Diagnosis System [03/2019 - 09/2020]

CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION

The systems (ECUs and sensors) that use CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed to the vehicle.

Techstream display and installed systems

HINT:

The names of ECUs and sensors shown on the Techstream display may differ from those shown in DTC Table by ECU.

Connected to	Code	ECU/Sensor Name	Techstream Display	Applicability
V bus	CGW	Central gateway ECU (network gateway ECU)	CAN Gateway1 CAN Gateway2	Installed on all vehicles
V bus	DLC3	DLC3	-	Installed on all vehicles
Bus 2	ENG	ECM	ECM (Engine)	Installed on all vehicles
	MET	Combination meter assembly	Combination Meter	Installed on all vehicles
	EPS	Power steering ECU assembly	Power Steering (EPS)	Installed on all vehicles
	A/C	Air conditioning amplifier assembly	Air Conditioning Amplifier	Installed on all vehicles
	SMT	Certification ECU (smart key ECU assembly)	Certification (Smart)	Installed on all vehicles
	MB	Main body ECU (multiplex network body ECU)	Main Body	Installed on all vehicles
	ASC	Stereo component equalizer assembly	ASC	Vehicles with ASC system
	BRK	Skid control ECU (brake actuator assembly)	Skid Control (ABS/VSC/TRAC)	Installed on all vehicles
	YGS	Yaw rate sensor	Yaw Rate Sensor	Installed on all vehicles
	SRS	Airbag ECU assembly	Airbag	Installed on all vehicles
	STR	Steering sensor	Spiral cable (Steering Angle Sensor)	Installed on all vehicles
	TVD	Torque vectoring differential ECU assembly	TVD	Vehicles with torque vectoring differential system
	RSC	Spoiler control ECU assembly	Active Rear Wing	Vehicles with active rear wing system
Bus 3	AV	Radio receiver assembly	Display and Navigation (AVN)	Installed on all vehicles
	DCM	Telematics transceiver	DCM	Vehicles with Lexus Enform remote compatible type
	YGW	Option connector (bus buffer ECU)	Accessory Gateway	Vehicles with CAN compatible optional devices
	YGW2	Option connector (bus buffer ECU) (for data logger)	-	Installed on all vehicles
Bus 5	CS	Clearance warning ECU assembly	Clearance Warning (Intuitive Parking Assist)	Vehicles with intuitive parking assist system
	SUS	Absorber control ECU	Suspension Control (Air Suspension)	Installed on all vehicles
	DS	Driving support ECU assembly	Driving Support (Cruise Control-ACC)	Installed on all vehicles
	F-CAM	Forward recognition camera	Front Camera Module	Installed on all vehicles
	F-MR	Millimeter wave radar sensor assembly	Front Radar	Installed on all vehicles
	BSM	Blind spot monitor sensor LH	Blind Spot Monitor Master	Vehicles with blind spot monitor system
	R-CA	Rear Television Camera Assembly	Parking Assist Monitor System / Rear Camera	Installed on all vehicles
Sub bus 1	MB	Main body ECU (multiplex network body ECU)	-	Installed on all vehicles
	MIR-L	Outer mirror control ECU assembly (for driver side)	Outer Mirror Control (L Seat)	Vehicles with seat position memory system
	MIR-R	Outer mirror control ECU assembly (for front passenger side)	Outer Mirror Control (R Seat)	Vehicles with seat position memory system
	T&T	Multiplex tilt and telescopic ECU	Multiplex Tilt and Telescopic	Installed on all vehicles
	DST	Position control ECU and switch assembly LH	D-Seat	Installed on all vehicles
	LITM	Headlight ECU sub-assembly LH	Headlight swivel (AFS)	Installed on all vehicles
	PST	Position control ECU and switch assembly RH	P-Seat	Installed on all vehicles

CAN BUS CHECK

HINT:

The ECUs and sensors that are properly connected to the CAN communication system can be displayed using the Techstream.

Using the Techstream, select the CAN Bus Check screen.

NOTE:

It may be possible to select buses that do not have ECUs or sensors from the bus selection pull-down menu. This is not a malfunction. (This occurs when optional devices are not on a sub bus that is monitored by a gateway function equipped ECU.)
In the bus selection pull down menu, all buses applicable to the model are displayed (e.g. LIN communication buses are also displayed). Therefore, refer to the wiring diagrams to check the names of sub buses for CAN communication.
Refer to SYSTEM DIAGRAM [03/2019 - 09/2020]

HINT:

Different connection statuses are indicated by the background color of ECUs and sensors that are displayed.

EXPLANATION OF CAN BUS CHECK SCREEN

Bus Type	Background Color	Connection Status
Bus	White	Communication has been normal.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Currently not communicating (either of the following): Not communicating since the start of the CAN bus check Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
	Not displayed	Either of the following: The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream.4 No ECUs or sensors are connected to the bus.5
Sub bus with a gateway function equipped ECU that does not memorize connected ECUs or sensors*2	White	Communication has been normal since the start of the CAN bus check.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
	Not displayed	Communication stop has continued since the start of the CAN bus check.*1
Sub bus with a gateway function equipped ECU that memorizes connected ECUs and sensors*3	White	Communication has been normal.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Currently not communicating (either of the following): Not communicating since the start of the CAN bus check Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
	Not displayed	Either of the following: The gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU).6 No ECUs or sensors are connected to the sub bus.7

Gateway function equipped ECUs relay signals between ECUs and sensors connected to different buses.
*1: An ECU or sensor is installed to the vehicle but is not displayed on the "Communication Bus Check" screen.
*2: The gateway function equipped ECU does not memorize ECUs and sensors connected to its respective sub bus.
*3: The gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus.
*4: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream, the name of buses, sub buses, ECUs and sensors will not be displayed.
*5: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.
*6: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.
*7: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.
If there is no communication between the Techstream and the vehicle, or no ECUs or sensors are displayed as connected, check the central gateway ECU (network gateway ECU) and V bus (the bus that connects the DLC3 to the central gateway ECU (network gateway ECU)) for malfunctions.

Observe the connection response screen for approximately 2 minutes to check for a change in connection status of the connected ECUs and sensors.
HINT:
- If an open occurs in one of the lines of a CAN branch (except DLC3), output from the other branch line (the line that is not open) will be unstable and it may interfere with the response (display) of other ECUs and sensors.
- If the connection status changes during the inspection, repair the open in the branch line of the ECU or sensor that does not respond (is not detected) and then perform the CAN bus check again.

HOW TO INTERPRET CAN BUS CHECK SCREEN

When a communication stop is currently occurring, the probable malfunctioning part can be determined from the CAN bus check and by using the following methods.
NOTE:
The following CAN bus wiring diagram is provided only as an example. This wiring diagram is different from the actual wiring diagram for this vehicle.

HINT:
- When a communication stop is currently occurring, it is easier to determine the probable malfunctioning part from the CAN bus check rather than from communication DTCs.
- Wait for approximately 2 minutes after turning the engine switch on (IG) (or simulate the driving conditions that enable the malfunction to be reproduced) and select "CAN Bus Check". Then observe the communication status of each ECU on the screen.

If a communication error of only 1 ECU or sensor is indicated on the CAN Bus Check screen, a communication stop of the ECU or sensor is suspected.

Example: Open in both CAN branch lines of HV on the bus 4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Bus 2	*b	Bus 4
*c	Sub Bus	*d	V Bus
*e	Location of Malfunction	*f	Background color is red

HINT:

When there are communication stops, ECUs that are present in the vehicle may not be displayed on the CAN Bus Check screen.

If communication errors for multiple ECUs or sensors are indicated on the CAN Bus Check screen, then a communication stop of the ECU or sensor that shows a more serious communication stop (an ECU or sensor whose background color is red) is suspected.

Example: Open in a CAN branch line for HV on the bus 4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Background color is red	*b	Background color intermittently becomes yellow or red
*c	Not displayed or background color is yellow or red	-	-

EXPLANATION OF CAN BUS CHECK SCREEN

Bus Type	Background Color	Connection Status
Bus	White	Communication has been normal.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Currently not communicating (either of the following): Not communicating since the start of the CAN bus check Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
	Not displayed	Either of the following: The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream.4 No ECUs or sensors are connected to the bus.5
Sub bus with a gateway function equipped ECU that does not memorize connected ECUs or sensors*2	White	Communication has been normal since the start of the CAN bus check.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
	Not displayed	Communication stop has continued since the start of the CAN bus check.*1
Sub bus with a gateway function equipped ECU that memorizes connected ECUs and sensors*3	White	Communication has been normal.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Currently not communicating (either of the following): Not communicating since the start of the CAN bus check Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
	Not displayed	Either of the following: The gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU).6 No ECUs or sensors are connected to the sub bus.7

Gateway function equipped ECUs relay signals between ECUs and sensors connected to different buses.
*1: An ECU or sensor is installed to the vehicle but is not displayed on the "Communication Bus Check" screen.
*2: The gateway function equipped ECU does not memorize ECUs and sensors connected to its respective sub bus.
*3: The gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus.
*4: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream, the name of buses, sub buses, ECUs and sensors will not be displayed.
*5: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.
*6: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.
*7: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.
The example of the CAN Bus Check screen in the illustration shows the result of electrical noise on the CAN bus which is caused by an open in a CAN branch line of HV is also unstable. In addition, in this example, MB is equipped with a gateway function. Therefore, communication is also unstable between the Sub bus ECUs of MB and the bus 4.
The example in the illustration shows that HV has a red background color on the CAN Bus Check screen. This indicates a more significant communication stop. In this case, a communication stop of HV is suspected.

If a communication error is indicated on both the bus 4 and Sub bus on the CAN Bus Check screen, suspect any communication stop displayed for the bus 4 first.

Example: Open in both CAN branch lines of MB on the bus 4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Background color is red

Not displayed

HINT:

In the CAN bus check, it is possible to confirm the communication status of ECUs connected to the bus after connecting the Techstream to the DLC3. As for sub bus, it is possible to confirm which sub bus connected ECUs can communicate with a gateway function equipped ECU on the bus.
If a gateway function equipped ECU has a communication error, ECUs connected to the gateway function equipped ECU are also affected, and communication stops will be indicated.
The CAN Bus Check screen in the illustration shows that MB has a gateway function and a communication stop in MB is suspected.

If the CAN Bus Check screen indicates a communication stop only in the sub bus, a communication stop in the sub bus is suspected.

Example: Open in both CAN branch lines of MIR-R on the sub bus

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Background color is red

HINT:

A communication error in a sub bus does not affect the other buses.
When a gateway function equipped ECU has memorized the ECUs that are connected to the sub bus, if any of the ECUs connected to the gateway function equipped ECU has a communication error, the background color changes to yellow or red. (The displayed name will not disappear.)

If both of the bus 2 main bus lines are open, ECUs or sensors that are located farther away from the central gateway ECU (network gateway ECU) than the open part will be displayed as a communication stop on the CAN Bus Check screen.

(In this case, HVB, R-MGC and ENG background color changes to red.)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Bus 2	*b	Bus 4
*c	Sub Bus	*d	V Bus
*e	Location of Malfunction	*f	Background color is red

HINT:

If a communication error occurs in an ECU, it is not displayed on the CAN Bus Check screen even though the ECU is present.

If both of the sub bus main bus lines are open, ECUs that are located farther away from the gateway function equipped ECU than the open part will be displayed as a communication stop on the CAN Bus Check screen.

(In this case, MIR-L background color changes to red.)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Bus 2	*b	Bus 4
*c	Sub Bus	*d	V Bus
*e	Location of Malfunction	*f	Background color is red

When any of the following malfunctions occur, CAN communication cannot be established and almost all ECUs and sensors on the bus show a communication error on the CAN Bus Check screen.

DETAILS OF MALFUNCTION

Short between CAN lines (CANH and CANL)

Short between a CAN line (CANH or CANL) and +B

Short between a CAN line (CANH or CANL) and ground

Open in a CAN main bus line

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	When any of the following malfunctions occur on the bus 4	*b	When any of the following malfunctions occur on a sub bus
*c	Background color is red	*d	Not displayed

HINT:

When a malfunction occurs in the bus, almost all ECUs and sensors on the bus and sub bus indicate a communication error (almost all ECUs are not displayed). As communication with the gateway function equipped ECU that is connected to the bus stops, communication from the ECUs connected to the sub bus that is monitored by the gateway function equipped ECU also stops (these ECUs are not displayed).
When a malfunction occurs in a sub bus, almost all ECUs connected to the sub bus indicate a communication error.
A communication error in a sub bus does not affect the other buses.
The malfunctioning part can be determined by checking for a short circuit between CAN bus lines or between a CAN bus line and ground or +B short using an electrical tester.

If a communication error of all ECUs and sensors is indicated on the CAN Bus Check screen, a communication stop of the V bus (DLC3 - central gateway ECU (network gateway ECU)) is suspected.

Open in both CAN branch lines in the V bus

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Bus 2	*b	Bus 4
*c	Sub Bus	*d	V Bus
*e	Location of Malfunction	*f	Not displayed

HINT:

When there is no communication between the Techstream and the vehicle, no ECUs or sensors will be displayed.

DTC TABLE BY ECU

HINT:

In the CAN communication system, the CAN communication DTCs of each ECU can be displayed using the Techstream.
If CAN communication system DTCs are output, the malfunction cannot be determined only by the DTCs. Perform troubleshooting according to How to Proceed with Troubleshooting.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2019 - 01/2023]
If there is a malfunction currently, DTCs can be checked by performing steps in the DTC check procedure.

ECM / Techstream Display "Engine"

Powertrain > Engine > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to SFI System.
Refer to DIAGNOSTIC TROUBLE CODE CHART [03/2019 - 09/2020]

ECM / TECHSTREAM DISPLAY "ENGINE"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0101*	Lost Communication with TCM	The ECM does not receive data from the TCM for 1.25 seconds or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage of the ECM is 10.5 V or more.	Turn the engine switch on (IG) and wait at least 2.5 seconds.	MIL illuminates.	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster Control Module (Combination Meter)	The ECM does not receive data from the combination meter assembly for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the ECM is 10.5 V or more.	Turn the engine switch on (IG) and wait at least approximately 6 seconds.	MIL illuminates.	DTC is stored until it is cleared using the Techstream.

TCM / Techstream Display "ECT"

Powertrain > ECT > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Automatic Transmission System.
Refer to DIAGNOSTIC TROUBLE CODE CHART [03/2019 - 01/2023]

TCM / TECHSTREAM DISPLAY "ECT"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100*	Lost Communication with ECM / PCM "A"	The TCM does not receive data from the ECM for 1.25 seconds or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage of the ECM is 10.5 V or more.	Turn the engine switch on (IG) and wait at least 2.25 seconds.	MIL illuminates.	DTC is stored until it is cleared using the Techstream.

Skid Control ECU (Brake Actuator Assembly) / Techstream Display "Brake"

Chassis > Brake > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) / TECHSTREAM DISPLAY "BRAKE"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0074-88	Control Module Communication Bus "B" Off Bus Off	One of the following conditions is met: Delayed reception of data from the steering sensor or yaw rate sensor continues for 1 second or more. The following condition occurs 10 times or more within 60 seconds: Delayed reception of data from the steering sensor occurs once or more within 5 seconds. Delayed reception of data from the yaw rate sensor occurs once or more within 5 seconds. Bus off condition is detected.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage (+BS terminal voltage) of the skid control ECU (brake actuator assembly) is between 9.5 and 17.4 V.	Turn the engine switch on (IG) and wait at least 63 seconds.	ABS warning light illuminates. Slip indicator light illuminates.	DTC is stored until it is cleared using the Techstream.
U0100-87	Lost Communication with ECM/PCM "A" Missing Message	The skid control ECU (brake actuator assembly) does not receive data from the ECM for 2 seconds or more.	All conditions are met: The engine switch is on (IG) for 3 seconds or more. Vehicle speed is 15 km/h (9 mph) or more. The power source voltage (+BS terminal voltage) of the skid control ECU (brake actuator assembly) is between 9.5 and 17.4 V.	Turn the engine switch on (IG) and drive the vehicle at a speed of 15 km/h (9 mph) or more for 5 seconds or more.	Slip indicator light illuminates.	DTC is stored until it is cleared using the Techstream.
U0101-87	Lost Communication with TCM Missing Message	The skid control ECU (brake actuator assembly) does not receive data from the ECM for 2 seconds or more.	All conditions are met: The engine switch is on (IG) for 3 seconds or more. Vehicle speed is 15 km/h (9 mph) or more. The power source voltage (+BS terminal voltage) of the skid control ECU (brake actuator assembly) is between 9.5 and 17.4 V.	Turn the engine switch on (IG) and drive the vehicle at a speed of 15 km/h (9 mph) or more for 5 seconds or more.	Slip indicator light illuminates.	DTC is stored until it is cleared using the Techstream.
U0125-87	Lost Communication with Multi-axis Acceleration Sensor Module Missing Message	Either of the following conditions is met: The skid control ECU (brake actuator assembly) does not receive data from the yaw rate sensor for 1 second or more. The following condition occurs 10 times or more within 60 seconds: The skid control ECU (brake actuator assembly) does not receive data from the yaw rate sensor once or more within 5 seconds.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage (+BS terminal voltage) of the skid control ECU (brake actuator assembly) is between 9.5 and 17.4 V.	Turn the engine switch on (IG) and wait at least 63 seconds.	ABS warning light illuminates. Slip indicator light illuminates.	DTC is stored until it is cleared using the Techstream.
U0126-87	Lost Communication with Steering Angle Sensor Module Missing Message	Either of the following conditions is met: The skid control ECU (brake actuator assembly) does not receive data from the steering sensor for 1 second or more. The following condition occurs 10 times or more within 60 seconds: The skid control ECU (brake actuator assembly) does not receive data from the steering sensor once or more within 5 seconds.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage (+BS terminal voltage) of the skid control ECU (brake actuator assembly) is between 9.5 and 17.4 V.	Turn the engine switch on (IG) and wait at least 63 seconds.	Slip indicator light illuminates.	DTC is stored until it is cleared using the Techstream.
U0132-87	Lost Communication with Suspension Control Module "A" Missing Message	The skid control ECU (brake actuator assembly) does not receive data from the absorber control ECU for 1 second or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage (+BS terminal voltage) of the skid control ECU (brake actuator assembly) is between 9.5 and 17.4 V.	Turn the engine switch on (IG) and wait at least 4 seconds.	-	DTC is stored until it is cleared using the Techstream.

Power Steering ECU Assembly / Techstream Display "EMPS"

Chassis > EMPS > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

POWER STEERING ECU ASSEMBLY / TECHSTREAM DISPLAY "EMPS"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The power steering ECU assembly does not receive data from the ECM for 5 minutes or more.	All conditions are met: The engine switch is on (IG) for 3 seconds or more. Vehicle speed is 20 km/h (12 mph) or more. The power source voltage of the power steering ECU assembly is 9 V or more.	Drive the vehicle at a speed of 20 km/h (12 mph) or more for 5 minutes or more.	-	DTC remains stored only while malfunction is occurring.
U0129	Lost Communication with Brake System Control Module	The power steering ECU assembly does not receive data from the skid control ECU (brake actuator assembly) for 2.34 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the power steering ECU assembly is 9 V or more.	Turn the engine switch on (IG) and wait at least 5.34 seconds.	EPS warning light illuminates.	DTC remains stored only while malfunction is occurring.
U0132	Lost Communication with Ride Level Control Module	The power steering ECU assembly does not receive data from the absorber control ECU for 6.1 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the power steering ECU assembly is 9 V or more.	Turn the engine switch on (IG) and wait at least 9.1 seconds.	-	DTC remains stored only while malfunction is occurring.
U1104	Lost Communication with Driving Support ECU	The power steering ECU assembly does not receive data from the forward recognition camera for 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the power steering ECU assembly is 9 V or more.	Turn the engine switch on (IG) and wait at least 8 seconds.	-	DTC remains stored only while malfunction is occurring.

Main Body ECU (Multiplex Network Body ECU) / Techstream Display "Main Body"

Body Electrical > Main Body > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) / TECHSTREAM DISPLAY "MAIN BODY"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication With ECM/PCM "A"	The main body ECU (multiplex network body ECU) does not receive data from the ECM for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0101	Lost Communication with TCM	The main body ECU (multiplex network body ECU) does not receive data from the TCM for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0120	Lost Communication With Starter / Generator Control Module	The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The main body ECU (multiplex network body ECU) does not receive data from the skid control ECU (brake actuator assembly) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0151	Lost Communication with Restraints Control Module	The main body ECU (multiplex network body ECU) does not receive data from the airbag ECU assembly for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The main body ECU (multiplex network body ECU) does not receive data from the combination meter assembly for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0182	Lost Communication with AFS	The main body ECU (multiplex network body ECU) does not receive data from the headlight ECU sub-assembly LH for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0199	Lost Communication with "Door Control Module A"	The main body ECU (multiplex network body ECU) does not receive data from the outer mirror control ECU assembly (for front passenger side) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0200	Lost Communication with "Door Control Module B"	The main body ECU (multiplex network body ECU) does not receive data from the outer mirror control ECU assembly (for driver side) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0208	Lost Communication with "Seat Control Module A"	The main body ECU (multiplex network body ECU) does not receive data from the position control ECU and switch assembly LH for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0209	Lost Communication with "Seat Control Module B"	The main body ECU (multiplex network body ECU) does not receive data from the Position control ECU and switch assembly RH for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U023A	Lost Communication With Image Processing Module "A"	The main body ECU (multiplex network body ECU) does not receive data from the forward recognition camera for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0327	Software Incompatibility with Vehicle Security Control Module	The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U1002	Lost Communication with Gateway Module	The main body ECU (multiplex network body ECU) detects communication errors between itself and the position control ECU and switch assembly LH, Position control ECU and switch assembly RH, outer mirror control ECU assembly (for front passenger side), outer mirror control ECU assembly (for driver side), headlight ECU sub-assembly LH and multiplex tilt and telescopic ECU.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U1115	Lost Communication with Tilt & Telescopic Module	The main body ECU (multiplex network body ECU) does not receive data from the multiplex tilt and telescopic ECU for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U1117	Lost Communication with Accessory Gateway	The main body ECU (multiplex network body ECU) does not receive data from the option connector (bus buffer ECU) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.

Certification ECU (Smart Key ECU Assembly) / Techstream Display "Smart Access"

Body Electrical > Smart Access > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) / TECHSTREAM DISPLAY "SMART ACCESS"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The certification ECU (smart key ECU assembly) does not receive data from the ECM for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The certification ECU (smart key ECU assembly) does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The certification ECU (smart key ECU assembly) does not receive data from the combination meter assembly for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U1117	Lost Communication with Accessory Gateway	The certification ECU (smart key ECU assembly) does not receive data from the option connector (bus buffer ECU) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.

Certification ECU (Smart Key ECU Assembly) / Techstream Display "Power Source Control"

Body Electrical > Power Source Control > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) / TECHSTREAM DISPLAY "POWER SOURCE CONTROL"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	ECM Communication	The certification ECU (smart key ECU assembly) does not receive data from the ECM for 3.1 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 3.1 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0140	Lost Communication with Body Control Module	The certification ECU (smart key ECU assembly) does not receive data from the main body ECU (multiplex network body ECU) for 3 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The certification ECU (smart key ECU assembly) does not receive data from the combination meter assembly for 3.1 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 3.1 seconds.	-	DTC is stored until it is cleared using the Techstream.
U1117	Lost Communication with Accessory Gateway	The certification ECU (smart key ECU assembly) does not receive data from the option connector (bus buffer ECU) for 5 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	DTC is stored until it is cleared using the Techstream.

Certification ECU (Smart Key ECU Assembly) / Techstream Display "Starting Control"

Body Electrical > Starting Control > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) / TECHSTREAM DISPLAY "STARTING CONTROL"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The certification ECU (smart key ECU assembly) does not receive data from the ECM for 2 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 10.5 V or more.	Turn the engine switch on (IG) and wait at least 2 seconds.	-	DTC remains stored only while malfunction is occurring.

Headlight ECU Sub-assembly LH / Techstream Display "HL AutoLeveling"

Body Electrical > HL AutoLeveling > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: The headlight ECU sub-assembly LH stores U1000 if an internal error related to the CAN communication system is detected.
Refer to DIAGNOSTIC TROUBLE CODE CHART [03/2019 - ]

HEADLIGHT ECU SUB-ASSEMBLY LH / TECHSTREAM DISPLAY "HL AUTOLEVELING"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0073	Control Module Communication Bus OFF	The headlight ECU sub-assembly LH does not send/receive data for 1 second or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 4 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0100	Lost Communication with ECM/PCM "A"	The headlight ECU sub-assembly LH does not receive data from the ECM for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0101	Lost Communication with TCM	The headlight ECU sub-assembly LH does not receive data from the ECM for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The headlight ECU sub-assembly LH does not receive data from the skid control ECU (brake actuator assembly) for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The headlight ECU sub-assembly LH does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The headlight ECU sub-assembly LH does not receive data from the combination meter assembly for 30 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 33 seconds.	-	DTC is stored until it is cleared using the Techstream.
U1000*	CAN Communication Failure (Message Registry)	When the engine switch is turned on (IG), a CAN communication malfunction is detected.	The engine switch is on (IG).	Turn the engine switch on (IG).	-	DTC remains stored only while malfunction is occurring.

Telematics Transceiver (for Lexus Enform Remote Compatible Type) / Techstream Display "Telematics"

Body Electrical > Telematics > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

TELEMATICS TRANSCEIVER / TECHSTREAM DISPLAY "TELEMATICS"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0142	Lost Communication with Body Control Module "B"	The telematics transceiver does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 10 seconds or more. The power source voltage of the telematics transceiver is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The telematics transceiver does not receive data from the combination meter assembly for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 10 seconds or more. The power source voltage of the telematics transceiver is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0163	Lost Communication with Navigation Control Module	The telematics transceiver does not receive data from the radio receiver assembly for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 10 seconds or more. The power source voltage of the telematics transceiver is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.

Air Conditioning Amplifier Assembly / Techstream Display "Air Conditioner"

Body Electrical > Air Conditioner > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

AIR CONDITIONING AMPLIFIER ASSEMBLY / TECHSTREAM DISPLAY "AIR CONDITIONER"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The air conditioning amplifier assembly does not receive data from the ECM for 5 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0131	Lost Communication With Power Steering Control Module	The air conditioning amplifier assembly does not receive data from the power steering ECU assembly for 5 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication With Body Control Module "B"	The air conditioning amplifier assembly does not receive data from the main body ECU (multiplex network body ECU) for 5 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0151	Lost Communication With Restraints Control Module	The air conditioning amplifier assembly does not receive data from the airbag ECU assembly for 5 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication With Instrument Panel Cluster (IPC) Control Module	The air conditioning amplifier assembly does not receive data from the combination meter assembly for 5 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0163	Lost Communication With Navigation Control Module	The air conditioning amplifier assembly does not receive data from the radio receiver assembly for 5 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	DTC is stored until it is cleared using the Techstream.

Radio Receiver Assembly / Techstream Display "Navigation System"

Body Electrical > Navigation System > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

RADIO RECEIVER ASSEMBLY / TECHSTREAM DISPLAY "NAVIGATION SYSTEM"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0073	Sending Malfunction (Navigation to APGS)	The radio receiver assembly does not send/receive data.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the radio receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0100	Engine ECU Communication	The radio receiver assembly does not receive data from the ECM for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the radio receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0129	VSC (ECB) ECU Communication	The radio receiver assembly does not receive data from the skid control ECU (brake actuator assembly) for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the radio receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0140	Lost Communication with Body Control Module	The radio receiver assembly does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the radio receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0155	Meter ECU Communication	The radio receiver assembly does not receive data from the combination meter assembly for 30 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the radio receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 33 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0164	Air Conditioner ECU Communication	The radio receiver assembly does not receive data from the air conditioning amplifier assembly for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the radio receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0198	Lost Communication with Telematic Control Module	The radio receiver assembly does not receive data from the telematics transceiver for 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the radio receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 6 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0265	Lost Communication with Image Processing Sensor A	The radio receiver assembly does not receive data from the rear television camera assembly for 11.08 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the radio receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 14.08 seconds.	-	DTC is stored until it is cleared using the Techstream.
U1110	Clearance Sonar ECU Communication	The radio receiver assembly does not receive data from the clearance warning ECU assembly for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the radio receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	DTC is stored until it is cleared using the Techstream.

Combination Meter Assembly / Techstream Display "Combination Meter"

Body Electrical > Combination Meter > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

COMBINATION METER ASSEMBLY / TECHSTREAM DISPLAY "COMBINATION METER"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The combination meter assembly does not receive data from the ECM for 2 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the combination meter assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 2 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The combination meter assembly does not receive data from the skid control ECU (brake actuator assembly) for 3 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the combination meter assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0131	Lost Communication with Power Steering Control Module	The combination meter assembly does not receive data from the power steering ECU assembly for 3 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the combination meter assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	EPS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The combination meter assembly does not receive data from the main body ECU (multiplex network body ECU) for 3 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the combination meter assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0151	Lost Communication with Restraints Control Module	The combination meter assembly does not receive data from the airbag ECU assembly for 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the combination meter assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	SRS warning light illuminates. Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0163	Lost Communication With Navigation Control Module	The combination meter assembly does not receive data from the radio receiver assembly for 3 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the combination meter assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0182	Lost Communication with Lighting Control Module Front	The combination meter assembly does not receive data from the headlight ECU sub-assembly LH for 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the combination meter assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	-	DTC is stored until it is cleared using the Techstream.
U023A	Lost Communication with Front Camera Module	The combination meter assembly does not receive data from the forward recognition camera for 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the combination meter assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1104	Lost Communication with Driving Support ECU	The combination meter assembly does not receive data from the driving support ECU assembly for 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the combination meter assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.

Outer Mirror Control ECU Assembly (for Front Passenger Side with Seat Position Memory System) / Techstream Display "Mirror R"

Body Electrical > Mirror R > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

OUTER MIRROR CONTROL ECU ASSEMBLY (FOR FRONT PASSENGER SIDE) / TECHSTREAM DISPLAY "MIRROR R"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0142	Lost Communication With Body Control Module "B"	The outer mirror control ECU assembly (for front passenger side) does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the outer mirror control ECU assembly (for front passenger side) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.

Outer Mirror Control ECU Assembly (for Driver Side with Seat Position Memory System) / Techstream Display "Mirror L"

Body Electrical > Mirror L > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

OUTER MIRROR CONTROL ECU ASSEMBLY (FOR DRIVER SIDE) / TECHSTREAM DISPLAY "MIRROR L"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0142	Lost Communication With Body Control Module "B"	The outer mirror control ECU assembly (for driver side) does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the outer mirror control ECU assembly (for driver side) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC is stored until it is cleared using the Techstream.

Multiplex Tilt and Telescopic ECU / Techstream Display "Tilt & Telescopic"

Body Electrical > Tilt&Telescopic > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

MULTIPLEX TILT AND TELESCOPIC ECU / TECHSTREAM DISPLAY "TILT & TELESCOPIC"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0142	Lost Communication with Body ECU	The multiplex tilt and telescopic ECU does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the multiplex tilt and telescopic ECU is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC remains stored only while malfunction is occurring.
U0208	Lost Communication with D-Seat ECU	The multiplex tilt and telescopic ECU does not receive data from the position control ECU and switch assembly LH for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the multiplex tilt and telescopic ECU is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	DTC remains stored only while malfunction is occurring.

Driving Support ECU Assembly / Techstream Display "Radar Cruise"

Powertrain > Radar Cruise > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Dynamic Radar Cruise Control System.
Refer to DIAGNOSTIC TROUBLE CODE CHART [03/2019 - 01/2023]

DRIVING SUPPORT ECU ASSEMBLY / TECHSTREAM DISPLAY "RADAR CRUISE"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The driving support ECU assembly does not receive data from the ECM for 0.92 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Vehicle speed is 36 km/h (22 mph) or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Drive the vehicle at a speed of 36 km/h (22 mph) or more for 1.92 seconds or more.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0125	Lost Communication with Yaw Rate Sensor Module	The driving support ECU assembly does not receive data from the yaw rate sensor for 0.72 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Vehicle speed is 36 km/h (22 mph) or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Drive the vehicle at a speed of 36 km/h (22 mph) or more for 1.72 seconds or more.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The driving support ECU assembly does not receive data from the steering sensor for 5.04 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Vehicle speed is 36 km/h (22 mph) or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Drive the vehicle at a speed of 36 km/h (22 mph) or more for 6.04 seconds or more.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The driving support ECU assembly does not receive data from the skid control ECU (brake actuator assembly) for 1.08 seconds or more.	All conditions are met: The engine switch is on (IG) for 2 seconds or more. Vehicle speed is 36 km/h (22 mph) or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Drive the vehicle at a speed of 36 km/h (22 mph) or more for 3.08 seconds or more.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0235*	Lost Communication with Cruise Control Front Distance Range Sensor	The driving support ECU assembly does not receive data from the millimeter wave radar sensor assembly for 1.6 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Vehicle speed is 36 km/h (22 mph) or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Drive the vehicle at a speed of 36 km/h (22 mph) or more for 2.6 seconds or more.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1104*	Lost Communication with Driving Support ECU	The millimeter wave radar sensor assembly does not receive data from the driving support ECU assembly for 0.2 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Vehicle speed is 36 km/h (22 mph) or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Drive the vehicle at a speed of 36 km/h (22 mph) or more for 1.2 seconds or more.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

Driving Support ECU Assembly / Techstream Display "Pre-Collision 2"

Body Electrical > Pre-Collision 2 > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Pre-collision System.
Refer to DIAGNOSTIC TROUBLE CODE CHART [03/2019 - 01/2023]

DRIVING SUPPORT ECU ASSEMBLY / TECHSTREAM DISPLAY "PRE-COLLISION 2"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The driving support ECU assembly does not receive data from the ECM for 5.12 seconds or more.	All conditions are met: The engine switch is on (IG) for 3 seconds or more. Vehicle speed is 5 km/h (3 mph) or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more for 8.12 seconds or more.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U0125	Lost Communication with Yaw Rate Sensor Module	The driving support ECU assembly does not receive data from the yaw rate sensor for 0.72 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 3.72 seconds.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The driving support ECU assembly does not receive data from the steering sensor for 5.04 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 8.04 seconds.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The driving support ECU assembly does not receive data from the skid control ECU (brake actuator assembly) for 4.92 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 7.92 seconds.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U0235*	Lost Communication with Cruise Control Front Distance Range Sensor	The driving support ECU assembly does not receive data from the millimeter wave radar sensor assembly for 0.3 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 3.3 seconds.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U023A*	Lost Communication with Image Processing Module "A"	The driving support ECU assembly does not receive data from the forward recognition camera for 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 6 seconds.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U1002*	Lost Communication with Gateway Module	The driving support ECU assembly does not receive data from the millimeter wave radar sensor assembly and forward recognition camera for 0.5 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 3.5 seconds.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U1104*	Lost Communication with Driving Support ECU	One of the following conditions is met: The millimeter wave radar sensor assembly does not receive data from the driving support ECU assembly for 0.144 seconds or more. The forward recognition camera does not receive data from the driving support ECU assembly for 0.224 seconds or more. The skid control ECU (brake actuator assembly) does not receive data from the driving support ECU assembly for 1.456 seconds or more.	Both conditions are met: The engine switch is on (IG) for 2 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 3.456 seconds.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.

Clearance Warning ECU Assembly (w/ Intuitive Parking Assist System) / Techstream Display "Intuitive P/A"

Body Electrical > Intuitive P/A > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

CLEARANCE WARNING ECU ASSEMBLY / TECHSTREAM DISPLAY "INTUITIVE P/A"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0101	Lost Communication with TCM	The clearance warning ECU assembly does not receive data from the ECM for 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for 5 seconds or more. The power source voltage of the clearance warning ECU assembly is 10.2 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The clearance warning ECU assembly does not receive data from the combination meter assembly for 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for 5 seconds or more. The power source voltage of the clearance warning ECU assembly is 10.2 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	-	DTC is stored until it is cleared using the Techstream.

Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System) / Techstream Display "Blind Spot Monitor Master"

Body Electrical > Blind Spot Monitor Master > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Blind Spot Monitor System.
Refer to DIAGNOSTIC TROUBLE CODE CHART [03/2019 - ]

BLIND SPOT MONITOR SENSOR LH / TECHSTREAM DISPLAY "BLIND SPOT MONITOR MASTER"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The blind spot monitor sensor LH does not receive data from the ECM for 10.85 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Blind spot monitor main switch is on. Vehicle speed is 5 km/h (3 mph) or more. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and drive the vehicle at a speed of 5 km/h (3 mph) or more for 11.85 seconds or more.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0125	Lost Communication with Yaw Rate Sensor Module	The blind spot monitor sensor LH does not receive data from the yaw rate sensor for 0.86 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Blind spot monitor main switch is on. Vehicle speed is 7 km/h (4 mph) or more. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and drive the vehicle at a speed of 7 km/h (4 mph) or more for 1.86 seconds or more.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The blind spot monitor sensor LH does not receive data from the steering sensor for 10.68 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait at least 11.68 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The blind spot monitor sensor LH does not receive data from the skid control ECU (brake actuator assembly) for 2.33 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait at least 3.33 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The blind spot monitor sensor LH does not receive data from the main body ECU (multiplex network body ECU) for 10.6 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait at least 11.6 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0232*	Lost Communication with Blind Spot Monitor Slave Module	The blind spot monitor sensor LH does not receive data from the blind spot monitor sensor RH for 10.6 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait at least 11.6 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1331*	Software Incompatibility with Body Control Module "B"	Destination information of the main body ECU (multiplex network body ECU) and blind spot monitor sensor do not match.	All conditions are met: The engine switch is on (IG) for 1 second or more. Blind spot monitor main switch is on.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait at least 1 second.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

Forward Recognition Camera / Techstream Display "LKA/LDA"

Chassis > LKA/LDA > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Lane Departure Alert System (w/ Steering Control).
Refer to DIAGNOSTIC TROUBLE CODE CHART [03/2019 - 01/2023]

FORWARD RECOGNITION CAMERA / TECHSTREAM DISPLAY "LKA/LDA"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The forward recognition camera does not receive data from the ECM for 5 seconds or more.	All conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. Vehicle speed is 1 km/h or 1 mph or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and drive the vehicle at a speed of 1 km/h or 1 mph or more for 7 seconds or more.	Displays messages on the multi-information display. Lane departure alert indicator (yellow) illuminates.	DTC is stored until it is cleared using the Techstream.
U0101	Lost Communication with TCM	The forward recognition camera does not receive data from the ECM for 5 seconds or more.	All conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. Vehicle speed is 1 km/h or 1 mph or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and drive the vehicle at a speed of 1 km/h or 1 mph or more for 7 seconds or more.	Displays messages on the multi-information display. Lane departure alert indicator (yellow) illuminates.	DTC is stored until it is cleared using the Techstream.
U0123	Lost Communication with Yaw Rate Sensor Module	The forward recognition camera does not receive data from the yaw rate sensor for 5 seconds or more.	All conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. Vehicle speed is 1 km/h or 1 mph or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and drive the vehicle at a speed of 1 km/h or 1 mph or more for 7 seconds or more.	Displays messages on the multi-information display. Lane departure alert indicator (yellow) illuminates.	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The forward recognition camera does not receive data from the steering sensor for 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least 7 seconds.	Displays messages on the multi-information display. Lane departure alert indicator (yellow) illuminates.	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The forward recognition camera does not receive data from the skid control ECU (brake actuator assembly) for 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least 7 seconds.	Displays messages on the multi-information display. Lane departure alert indicator (yellow) illuminates.	DTC is stored until it is cleared using the Techstream.
U0131	Lost Communication with Power Steering Control Module	The forward recognition camera does not receive data from the power steering ECU assembly for 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least 7 seconds.	Displays messages on the multi-information display. Lane departure alert indicator (yellow) illuminates.	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The forward recognition camera does not receive data from the main body ECU (multiplex network body ECU) for 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least 7 seconds.	Displays messages on the multi-information display. Lane departure alert indicator (yellow) illuminates.	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The forward recognition camera does not receive data from the combination meter assembly for 50 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least 52 seconds.	Displays messages on the multi-information display. Lane departure alert indicator (yellow) illuminates.	DTC is stored until it is cleared using the Techstream.
U0235*	Lost Communication with Cruise Control Front Distance Range Sensor	The forward recognition camera does not receive data from the millimeter wave radar sensor assembly for 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least 7 seconds.	Displays messages on the multi-information display. Lane departure alert indicator (yellow) illuminates.	DTC is stored until it is cleared using the Techstream.
U023A*	Lost Communication with Image Processing Module "A"	The forward recognition camera does not receive data from the power steering ECU assembly for 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least 7 seconds.	Displays messages on the multi-information display. Lane departure alert indicator (yellow) illuminates.	DTC is stored until it is cleared using the Techstream.
U1104*	Lost Communication with Driving Support ECU	The forward recognition camera does not receive data from the driving support ECU assembly for 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least 7 seconds.	Displays messages on the multi-information display. Lane departure alert indicator (yellow) illuminates.	DTC is stored until it is cleared using the Techstream.

Forward Recognition Camera / Techstream Display "Front Recognition Camera"

Chassis > Front Recognition Camera > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Forward Recognition Camera System.
Refer to DIAGNOSTIC TROUBLE CODE CHART [03/2019 - 01/2023]

FORWARD RECOGNITION CAMERA / TECHSTREAM DISPLAY "FRONT RECOGNITION CAMERA"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The forward recognition camera does not receive data from the ECM for 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. Vehicle speed is 1 km/h or 1 mph or more.	Drive the vehicle at a speed of 1 km/h or 1 mph or more for 7 seconds or more.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U0101	Lost Communication with TCM	The forward recognition camera does not receive data from the ECM for 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. Vehicle speed is 1 km/h or 1 mph or more.	Drive the vehicle at a speed of 1 km/h or 1 mph or more for 7 seconds or more.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0123	Lost Communication with Yaw Rate Sensor Module	The forward recognition camera does not receive data from the yaw rate sensor for 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more. Vehicle speed is 1 km/h or 1 mph or more.	Drive the vehicle at a speed of 1 km/h or 1 mph or more for 7 seconds or more.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The forward recognition camera does not receive data from the skid control ECU (brake actuator assembly) for 5 seconds or more.	The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more.	Turn the engine switch on (IG) and wait at least 7 seconds.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The forward recognition camera does not receive data from the main body ECU (multiplex network body ECU) for 5 seconds or more.	The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more.	Turn the engine switch on (IG) and wait at least 7 seconds.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U0235*	Lost Communication with Cruise Control Front Distance Range Sensor	The forward recognition camera does not receive data from the millimeter wave radar sensor assembly for 5 seconds or more.	The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more.	Turn the engine switch on (IG) and wait at least 7 seconds.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.
U1104*	Lost Communication with Driving Support ECU	The forward recognition camera does not receive data from the driving support ECU assembly for 5 seconds or more.	The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for 2 seconds or more.	Turn the engine switch on (IG) and wait at least 7 seconds.	Displays messages on the multi-information display. PCS warning light illuminates.	DTC is stored until it is cleared using the Techstream.

Rear Television Camera Assembly / Techstream Display "Advanced Parking Guidance/Parking Assist Monitor"

Chassis > Advanced Parking Guidance/Parking Assist Monitor > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: The rear television camera assembly stores U1000 if an internal error related to the CAN communication system is detected.
Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2017 - ]

REAR TELEVISION CAMERA ASSEMBLY / TECHSTREAM DISPLAY "ADVANCED PARKING GUIDANCE/PARKING ASSIST MONITOR"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The rear television camera assembly does not receive data from the ECM for 12 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the rear television camera assembly is 5.5 V or more.	Turn the engine switch on (IG) and wait at least 15 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The rear television camera assembly does not receive data from the steering sensor for 12 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the rear television camera assembly is 5.5 V or more.	Turn the engine switch on (IG) and wait at least 15 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0140	Lost Communication with Body Control Module	The rear television camera assembly does not receive data from the main body ECU (multiplex network body ECU) for 11 seconds or more.	Both conditions are met: The engine switch is on (ACC) for 3 seconds or more. The power source voltage of the rear television camera assembly is 5.5 V or more.	Turn the engine switch on (IG) and wait at least 14 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0163	Lost Communication with Navigation Control Module	The rear television camera assembly does not receive data from the radio receiver assembly for 11 seconds or more.	Both conditions are met: The engine switch is on (ACC) for 3 seconds or more. The power source voltage of the rear television camera assembly is 5.5 V or more.	Turn the engine switch on (IG) and wait at least 14 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0233	Lost Communication with Blind Spot Monitor Master Module	The rear television camera assembly does not receive data from the blind spot monitor sensor LH for 11 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the rear television camera assembly is 5.5 V or more.	Turn the engine switch on (IG) and wait at least 14 seconds.	-	DTC is stored until it is cleared using the Techstream.
U1000*	CAN Communication Failure (Message Registry)	When the engine switch is turned on (IG), a CAN communication malfunction is detected.	The engine switch is on (IG).	Turn the engine switch on (IG).	-	DTC is stored until it is cleared using the Techstream.
U1110	Lost Communication with Intuitive Parking Assist Module	The rear television camera assembly does not receive data from the clearance warning ECU assembly for 11 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the rear television camera assembly is 5.5 V or more.	Turn the engine switch on (IG) and wait at least 14 seconds.	-	DTC is stored until it is cleared using the Techstream.

Stereo component equalizer assembly (w/ ASC System) / Techstream Display "ASC"

Body Electrical > ASC > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

STEREO COMPONENT EQUALIZER ASSEMBLY / TECHSTREAM DISPLAY "ASC"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication With ECM/PCM "A"	The stereo component equalizer assembly does not receive data from the ECM for 5.2 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the stereo component equalizer assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 8.2 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0122	Lost Communication With Vehicle Dynamics Control Module	The stereo component equalizer assembly does not receive data from the skid control ECU (brake actuator assembly) for 1.1 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the stereo component equalizer assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 4.1 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication With Body Control Module "B"	The stereo component equalizer assembly does not receive data from the main body ECU (multiplex network body ECU) for 3.1 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the stereo component equalizer assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 6.1 seconds.	-	DTC is stored until it is cleared using the Techstream.

Spoiler control ECU assembly (w/ Active Rear Wing System) / Techstream Display "Active Rear Wing"

Body Electrical > Active Rear Wing > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

SPOILER CONTROL ECU ASSEMBLY / TECHSTREAM DISPLAY "ACTIVE REAR WING"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0101	Lost Communication with TCM	The spoiler control ECU assembly does not receive data from the ECM for 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the spoiler control ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	-	DTC remains stored only while malfunction is occurring.
U0129	Lost Communication with Brake System Control Module	The spoiler control ECU assembly does not receive data from the skid control ECU (brake actuator assembly) for 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the spoiler control ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	-	DTC remains stored only while malfunction is occurring.
U0142	Lost Communication with Body Control Module "B"	The spoiler control ECU assembly does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the spoiler control ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	-	DTC remains stored only while malfunction is occurring.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The spoiler control ECU assembly does not receive data from the combination meter assembly for 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the spoiler control ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	-	DTC remains stored only while malfunction is occurring.

Torque vectoring differential ECU assembly (w/ Torque Vectoring Differential System) / Techstream Display "TVD"

Chassis > TVD > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

TORQUE VECTORING DIFFERENTIAL ECU ASSEMBLY / TECHSTREAM DISPLAY "TVD"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication With ECM/PCM "A"	The torque vectoring differential ECU assembly does not receive data from the ECM for 0.84 seconds or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage of the torque vectoring differential ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 1.84 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0122	Lost Communication With Vehicle Dynamics Control Module (ch1)	The torque vectoring differential ECU assembly does not receive data from the skid control ECU (brake actuator assembly) for 0.72 seconds or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage of the torque vectoring differential ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 1.72 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0123	Lost Communication With Yaw Rate Sensor Module	The torque vectoring differential ECU assembly does not receive data from the yaw rate sensor for 0.72 seconds or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage of the torque vectoring differential ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 1.72 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication With Steering Angle Sensor Module	The torque vectoring differential ECU assembly does not receive data from the steering sensor for 0.72 seconds or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage of the torque vectoring differential ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 1.72 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0131	Lost Communication With Power Steering Control Module	The torque vectoring differential ECU assembly does not receive data from the power steering ECU assembly for 0.8 seconds or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage of the torque vectoring differential ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 1.8 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1172	Lost Communication With Vehicle Dynamics Control Module (ch2)	The torque vectoring differential ECU assembly does not receive data from the skid control ECU (brake actuator assembly) for 0.72 seconds or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage of the torque vectoring differential ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 1.72 seconds.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

Absorber Control ECU / Techstream Display "Air suspension"

Chassis > Air suspension > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

ABSORBER CONTROL ECU / TECHSTREAM DISPLAY "AIR SUSPENSION"

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The absorber control ECU does not receive data from the ECM for 3 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Vehicle speed is 30 km/h (19 mph) or more. The power source voltage of the absorber control ECU is 10 V or more.	Drive the vehicle at a speed of 30 km/h (19 mph) or more for 4 seconds or more.	-	DTC is stored until it is cleared using the Techstream.
U0101	Lost Communication with TCM	The absorber control ECU does not receive data from the TCM for 6 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Vehicle speed is 30 km/h (19 mph) or more. The power source voltage of the absorber control ECU is 10 V or more.	Drive the vehicle at a speed of 30 km/h (19 mph) or more for 7 seconds or more.	-	DTC is stored until it is cleared using the Techstream.
U0122	Lost Communication with Vehicle Dynamics Control Module	The absorber control ECU does not receive data from the skid control ECU (brake actuator assembly) for 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for 2 seconds or more. The power source voltage of the absorber control ECU is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0124	Lost Communication with Lateral Acceleration Sensor Module	The absorber control ECU does not receive data from the yaw rate sensor for 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage of the absorber control ECU is 10 V or more.	Turn the engine switch on (IG) and wait at least 4 seconds.	-	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The absorber control ECU does not receive data from the steering sensor for 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage of the absorber control ECU is 10 V or more.	Turn the engine switch on (IG) and wait at least 4 seconds.	-	DTC is stored until it is cleared using the Techstream.

Central Gateway ECU (Network Gateway ECU) / Techstream Display "Central Gateway"
HINT:

The central gateway ECU (network gateway ECU) is connected to the CAN communication system, but the central gateway ECU (network gateway ECU) does not store or output CAN communication DTCs.
Yaw Rate Sensor
HINT:

The yaw rate sensor is connected to the CAN communication system, but the yaw rate sensor does not store or output CAN communication DTCs.
Steering Sensor
HINT:

The steering sensor is connected to the CAN communication system, but the steering sensor does not store or output CAN communication DTCs.
Position Control ECU and Switch Assembly LH
HINT:

The position control ECU and switch assembly LH is connected to the CAN communication system, but the position control ECU and switch assembly LH does not store or output CAN communication DTCs.
Position Control ECU and Switch Assembly RH
HINT:

The Position control ECU and switch assembly RH is connected to the CAN communication system, but the Position control ECU and switch assembly RH does not store or output CAN communication DTCs.
Airbag ECU Assembly
HINT:

The airbag ECU assembly is connected to the CAN communication system, but the airbag ECU assembly does not store or output CAN communication DTCs.
Millimeter Wave Radar Sensor Assembly
HINT:

The millimeter wave radar sensor assembly is connected to the CAN communication system, but the millimeter wave radar sensor assembly does not store or output CAN communication DTCs.

CAN BUS WAVEFORMS

HINT:

The following waveforms are measured between terminals CANH and GND, and terminals CANL and GND of the central gateway ECU (network gateway ECU). (Use this as a reference for diagnosis of CAN communication lines.)
When malfunctions in multiple ECUs are suspected based on the CAN bus check and DTCs checked using the Techstream, check the resistance of the CAN bus using an ohmmeter first. If no problems are found, check the following waveforms.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2019 - 01/2023]
If a waveform is not similar to one of the following 3 patterns (Group 1), then an open in a CAN main bus line, an open in a CAN branch line, or a short between a CAN line (CANH or CANL) and ground is suspected (Group 2).
Wiggle the connector and wire harness to check if the waveform changes.

CAN bus waveforms (Group 1)

Normal waveform

Open in both of the lines (CANH and CANL) of a CAN branch

HINT:

Waveforms (waveforms shown using dotted lines) are not present from an ECU or sensor connected to a CAN branch with an open circuit in both lines. (Waveforms from other ECUs or sensors are normal.)
Because this waveform is similar to a normal waveform, instead of using the waveform, the malfunctioning part can be narrowed down by performing a CAN bus check.

Short between the CAN bus lines (CANH and CANL)

HINT:

Waveforms disappear.
If the malfunction is in an ECU, disconnecting the ECU will change the waveform. If the waveform does not change, a malfunction in the wire harness is suspected.

CAN bus waveforms (reference) (Group 2)

NOTE:

The following CAN bus waveforms can be used only as reference. The actual measured waveform may differ significantly depending on the location of the open or short circuit.

Open in a CAN branch line (CANH)

HINT:

An abnormal waveform is output from an ECU with an open in one of its CAN branch lines. Because this abnormal output interferes with the signals from other ECUs, the output of other ECUs will also appear abnormal.
Narrow down the malfunctioning part by checking DTCs or performing a CAN bus check, or by checking waveform changes when ECUs or sensors are disconnected. The waveform will change to one for an open in both sides of a CAN branch when the ECU or sensor with an open CAN branch line is disconnected.

Open in a CAN branch line (CANL)

HINT:

An abnormal waveform is output from an ECU with an open in one of its CAN branch lines. Because this abnormal output interferes with the signals from other ECUs, the output of other ECUs will also appear abnormal.
Narrow down the malfunctioning part by checking DTCs or performing a CAN bus check, or by checking waveform changes when ECUs or sensors are disconnected. The waveform will change to one for an open in both sides of a CAN branch when the ECU or sensor with an open CAN branch line is disconnected.

Open in a CAN main bus line (CANH)

HINT:

Waveforms of ECUs or sensors that are closer to the central gateway ECU (network gateway ECU) than the open part are almost normal.
Waveforms of ECUs or sensors that are on the opposite side of the central gateway ECU (network gateway ECU) from the open part are abnormal.
An open in a CAN main bus line can be confirmed by measuring the resistance between the CANH and CANL terminals of any CAN branch.

Short between a CAN bus line (CANH) and ground

HINT:

Narrow down the shorted part by checking for waveform changes when disconnecting connectors from the CAN junction connectors or when disconnecting ECUs or sensors.
A short to ground in the CANH line can be confirmed by measuring the resistance between CANH and ground using an ohmmeter.

Short between a CAN bus line (CANL) and ground

HINT:

Narrow down the shorted part by checking for waveform changes when disconnecting connectors from the CAN junction connectors or when disconnecting ECUs or sensors.
A short to ground in the CANL line can be confirmed by measuring the resistance between CANL and ground using an ohmmeter.

DATA SENDING/RECEIVING TABLE

Data sending/receiving table

HINT:

If Data List items related to sent/received data are not displayed properly, the part for which communication is interrupted can be determined using the table below.

Data content	Data Detected and Sent by	Data Received by		Relevant Data List Item
Data content	Data Detected and Sent by	Can be Checked in the Data List	Cannot be Checked in the Data List	Selected System*5	Data List Item
Accelerator position	ECM	Skid control ECU (brake actuator assembly) Stereo component equalizer assembly	Radio receiver assembly Driving support ECU assembly Torque vectoring differential ECU assembly Forward recognition camera	Engine	Accelerator Position
				Brake	Accelerator Opening Angle %
				ASC	Accelerator Position
Engine speed	ECM	Skid control ECU (brake actuator assembly) Power steering ECU assembly Certification ECU (smart key ECU assembly) Combination meter assembly Absorber control ECU Stereo component equalizer assembly Torque vectoring differential ECU assembly	Air conditioning amplifier assembly Airbag ECU assembly Radio receiver assembly Main body ECU (multiplex network body ECU) Telematics transceiver Option connector (bus buffer ECU)	Engine	Engine Speed
				Brake	Engine Revolutions
				EMPS	Engine Revolution
				Starting Control	Engine Speed
				Combination Meter	Engine Rpm
				Air suspension	Engine Speed
				ASC	Engine Revolution
				TVD	Engine Speed
Engine coolant temperature	ECM	Air conditioning amplifier assembly Combination meter assembly Torque vectoring differential ECU assembly	Skid control ECU (brake actuator assembly) Power steering ECU assembly Radio receiver assembly Certification ECU (smart key ECU assembly)	Engine	Coolant Temp
				Air Conditioner	Engine Coolant Temp
				Combination Meter	Coolant Temperature
				TVD	Coolant Temperature
Vehicle speed	Skid control ECU (brake actuator assembly)	Power steering ECU assembly Combination meter assembly*3 Radio receiver assembly Stereo component equalizer assembly	Airbag ECU assembly Forward recognition camera Main body ECU (multiplex network body ECU) Telematics transceiver	Brake	Vehicle Speed
				EMPS	Meter Vehicle Velocity
				Combination Meter	Vehicle Speed Meter
				Navigation System	Vehicle Speed
				ASC	Vehicle Speed
	Combination meter assembly*3	Position control ECU and switch assembly LH Position control ECU and switch assembly RH Certification ECU (smart key ECU assembly)	Air conditioning amplifier assembly Main body ECU (multiplex network body ECU) Telematics transceiver Option connector (bus buffer ECU) Multiplex tilt and telescopic ECU Airbag ECU assembly Clearance warning ECU assembly	Combination Meter	Vehicle Speed Meter
				Driver Seat	Vehicle Speed
				Passenger Seat	Vehicle Speed
				Power Source Control	Vehicle Speed Signal
Wheel speed	Skid control ECU (brake actuator assembly)	Headlight ECU sub-assembly LH Torque vectoring differential ECU assembly Absorber control ECU	ECM Power steering ECU assembly Blind spot monitor sensor LH Forward recognition camera Airbag ECU assembly Radio receiver assembly Driving support ECU assembly	Brake	FR Wheel Speed
				HL AutoLeveling	Front Right Wheel Speed Value
				TVD	FR Wheel Speed
				Air suspension	FR Wheel Speed
Shift position	ECM	Radio receiver assembly Clearance warning ECU assembly Certification ECU (smart key ECU assembly) Blind spot monitor sensor LH Torque vectoring differential ECU assembly Skid control ECU (brake actuator assembly) Stereo component equalizer assembly Position control ECU and switch assembly LH Position control ECU and switch assembly RH	Combination meter assembly*2 Forward recognition camera Airbag ECU assembly Main body ECU (multiplex network body ECU) Driving support ECU assembly Telematics transceiver Rear television camera assembly Option connector (bus buffer ECU) Headlight ECU sub-assembly LH	Engine	Neutral Position SW Signal
				Navigation System	Reverse Signal
				Intuitive P/A	Parking Signal
				Power Source Control	Shift P Signal
				Blind Spot Monitor Master	Reverse (Only for AT/CVT)
				TVD	P Position
				Brake	Shift Lever Position
				ASC	Shift SW Status (N Range)
				Driver Seat	Shift SW Position
				Passenger Seat	Shift SW Position
Ambient temperature	Air conditioning amplifier assembly	Combination meter assembly ECM Torque vectoring differential ECU assembly	Power steering ECU assembly Radio receiver assembly Driving support ECU assembly Telematics transceiver Option connector (bus buffer ECU) Forward recognition camera	Air Conditioner	Ambient Temp Sensor
				Combination Meter	Ambient Temperature
				Engine	Ambient Temperature
				TVD	Outside Temperature
Driver door courtesy switch	Main body ECU (multiplex network body ECU)	-	Certification ECU (smart key ECU assembly) Combination meter assembly*2 Radio receiver assembly Telematics transceiver Option connector (bus buffer ECU)	Main Body	FL Door Courtesy SW
Steering angle sensor	Steering sensor	Skid control ECU (brake actuator assembly) Power steering ECU assembly Blind spot monitor sensor LH Driving support ECU assembly Torque vectoring differential ECU assembly Absorber control ECU	Airbag ECU assembly Radio receiver assembly Rear television camera assembly Forward recognition camera Combination meter assembly ECM Headlight ECU sub-assembly LH	Brake	Steering Angle Sensor
				EMPS	Steering Angle Velocity
				Blind Spot Monitor Master	Steering Angle
				Radar Cruise	Steering Angle
				TVD	Steering Angle
				Air suspension	Steering Angle
Yaw rate sensor	Yaw rate sensor	Skid control ECU (brake actuator assembly) Driving support ECU assembly Blind spot monitor sensor LH Torque vectoring differential ECU assembly	Power steering ECU assembly Forward recognition camera Airbag ECU assembly Radio receiver assembly	Brake	Yaw Rate Sensor
				Radar Cruise	Yaw Rate Sensor
				Blind Spot Monitor Master	Yaw Rate Sensor
				TVD	Yaw Rate Value
Acceleration sensor	Yaw rate sensor	Skid control ECU (brake actuator assembly) Driving support ECU assembly Torque vectoring differential ECU assembly	ECM Power steering ECU assembly Airbag ECU assembly Absorber control ECU Forward recognition camera Combination meter assembly Radio receiver assembly	Brake	Deceleration Sensor
				Radar Cruise	Deceleration Sensor 1
				TVD	Back and Forth G
Ignition switch condition	Main body ECU (multiplex network body ECU)	Position control ECU and switch assembly LH Position control ECU and switch assembly RH Multiplex tilt and telescopic ECU Certification ECU (smart key ECU assembly)	Outer mirror control ECU assembly (for driver side) Outer mirror control ECU assembly (for front passenger side) Rear television camera assembly Option connector (bus buffer ECU) Headlight ECU sub-assembly LH Combination meter assembly*2 Telematics transceiver Radio receiver assembly	Main Body	IG SW
				Driver Seat	Ignition Switch
				Passenger Seat	Ignition Switch
				Tilt&Telescopic	IG Switch
				Starting Control	Ignition
Stop light switch signal	Skid control ECU (brake actuator assembly)	Torque vectoring differential ECU assembly Absorber control ECU Driving support ECU assembly	Power steering ECU assembly Radio receiver assembly Airbag ECU assembly Telematics transceiver Option connector (bus buffer ECU)	Brake	Stop Light SW
				TVD	Stop Light SW
				Air suspension	Stop Light Switch
				Radar Cruise	Stop Light SW
Driver side buckle switch signal	Airbag ECU assembly	-	Main body ECU (multiplex network body ECU)*4 Telematics transceiver	SRS Airbag	Left side Buckle SW1 (MCPU)
Driver side buckle switch signal	Main body ECU (multiplex network body ECU)*4	-	Combination meter assembly*2 Telematics transceiver Radio receiver assembly	-	-
Headlight switch	Main body ECU (multiplex network body ECU)	Headlight ECU sub-assembly LH	Air conditioning amplifier assembly Combination meter assembly*2 Driving support ECU assembly Radio receiver assembly Forward recognition camera	Main Body	Dimmer SW
Headlight switch	Main body ECU (multiplex network body ECU)	Headlight ECU sub-assembly LH		HL AutoLeveling	Headlight High Beam State
Side turn signal	Combination meter assembly	Driving support ECU assembly Blind spot monitor sensor LH Forward recognition camera	Headlight ECU sub-assembly LH*6 Radio receiver assembly	Combination Meter	Turn Signal Switch (Right)
				Pre-Collision 2	Turn Light RH
				Blind spot monitor Master	Turn Switch State
				LKA/LDA	Turn Signal Switch (Right)
ECM power source voltage*1	ECM	-	-	Engine	Battery Voltage
Combination meter assembly power source voltage*1	Combination meter assembly	-	-	Combination Meter	+B Voltage Value
Skid control ECU (brake actuator assembly) power source voltage*1	Skid control ECU (brake actuator assembly)	-	-	Brake	IG1 Voltage Value
Power steering ECU assembly power source voltage*1	Power steering ECU assembly	-	-	EMPS	IG Power Supply
Radio receiver assembly power source voltage*1	Radio receiver assembly	-	-	Navigation System	Battery Voltage
Headlight ECU sub-assembly LH power source voltage*1	Headlight ECU sub-assembly LH	-	-	HL AutoLeveling	+B Voltage Value
Clearance sonar main switch condition*1	Clearance warning ECU assembly	-	-	Intuitive P/A	Main Switch
Blind spot monitor sensor LH power source voltage*1	Blind spot monitor sensor LH	-	-	Blind Spot Monitor Master	Power Supply Voltage
Outer mirror control ECU assembly (for driver side) power source voltage*1	Outer mirror control ECU assembly (for driver side)	-	-	Mirror L	+B Voltage Input Value
Outer mirror control ECU assembly (for front passenger side) power source voltage*1	Outer mirror control ECU assembly (for front passenger side)	-	-	Mirror R	+B Voltage Input Value
Position control ECU and switch assembly LH power source voltage*1	Position control ECU and switch assembly LH	-	-	Driver Seat	Power Voltage
Position control ECU and switch assembly RH power source voltage*1	Position control ECU and switch assembly RH	-	-	Passenger Seat	Power Voltage
Multiplex tilt and telescopic ECU power source voltage*1	Multiplex tilt and telescopic ECU	-	-	Tilt&Telescopic	Power Source Voltage
Torque vectoring differential ECU assembly power source voltage*1	Torque vectoring differential ECU assembly	-	-	TVD	Battery Voltage
Spoiler control ECU assembly power source voltage*1	Spoiler control ECU assembly	-	-	Active Rear Wing	ECU Battery Voltage

*1: Whether the ECU that sends data is functioning or not can be judged by using the Techstream to check items such as switches or sensors that send signals to the ECU via direct lines.
*2: Although the received contents cannot be checked in the Data List, whether or not the data is received normally can be checked by observing the combination meter assembly.
*3: The combination meter assembly receives a vehicle speed signal from the skid control ECU (brake actuator assembly) and sends the signal to other ECUs.
*4: The main body ECU (multiplex network body ECU) receives a driver seat buckle switch signal from the airbag ECU assembly and sends the signal to other ECUs.
*5: According to the display on the Techstream, read the Data List.
- Enter the following menus: Powertrain / Engine / Data List.
  Refer to DATA LIST / ACTIVE TEST [03/2019 - 09/2020]
- Enter the following menus: Chassis / Brake / Data List.
  Refer to DATA LIST / ACTIVE TEST [03/2019 - 01/2023]
- Enter the following menus: Body Electrical / ASC / Data List.
  Refer to DATA LIST / ACTIVE TEST [11/2017 - ]
- Enter the following menus: Chassis / EMPS / Data List.
  Refer to DATA LIST / ACTIVE TEST [09/2014 - ]
- Enter the following menus: Body Electrical / Power Source Control / Data List.
  Enter the following menus: Body Electrical / Starting Control / Data List.
  
  Refer to DATA LIST / ACTIVE TEST [09/2014 - 01/2023]
- Enter the following menus: Body Electrical / Combination Meter / Data List.
  Refer to DATA LIST / ACTIVE TEST [03/2019 - 01/2023]
- Enter the following menus: Chassis / Air suspension / Data List.
  Refer to DATA LIST / ACTIVE TEST [03/2019 - 01/2023]
- Enter the following menus: Chassis / TVD / Data List.
  Refer to DATA LIST / ACTIVE TEST [09/2014 - 01/2023]
- Enter the following menus: Body Electrical / Air Conditioner / Data List.
  Refer to DATA LIST / ACTIVE TEST [10/2015 - ]
- Enter the following menus: Body Electrical / Navigation System / Data List.
  Refer to DATA LIST / ACTIVE TEST [11/2017 - ]
- Enter the following menus: Body Electrical / Driver Seat, Passenger Seat / Data List.
  Refer to DATA LIST / ACTIVE TEST [11/2017 - ]
- Enter the following menus: Body Electrical / Intuitive P/A / Data List.
  Refer to DATA LIST / ACTIVE TEST [09/2014 - ]
- Enter the following menus: Body Electrical / HL AutoLeveling / Data List.
  Refer to DATA LIST / ACTIVE TEST [03/2019 - ]
- Enter the following menus: Body Electrical / Blind Spot Monitor Master / Data List.
  Refer to DATA LIST / ACTIVE TEST [09/2014 - ]
- Enter the following menus: Body Electrical / Main Body / Data List.
  Refer to DATA LIST / ACTIVE TEST [09/2014 - ]
  
  Refer to DATA LIST / ACTIVE TEST [03/2019 - ]
- Enter the following menus: Powertrain / Radar Cruise / Data List.
  Refer to DATA LIST / ACTIVE TEST [03/2019 - 01/2023]
- Enter the following menus: Body Electrical / Tilt & Telescopic / Data List.
  Refer to DATA LIST / ACTIVE TEST [09/2014 - ]
- Enter the following menus: Body Electrical / SRS Airbag / Data List.
  Refer to DATA LIST / ACTIVE TEST [09/2014 - ]
- Enter the following menus: Chassis / LKA/LDA / Data List.
  Refer to DATA LIST / ACTIVE TEST [11/2017 - 01/2023]
- Enter the following menus: Body Electrical / Pre-Collision 2 / Data List.
  Refer to DATA LIST / ACTIVE TEST [03/2019 - 01/2023]
- Enter the following menus: Body Electrical / Mirror L, Mirror R / Data List.
  Refer to DATA LIST / ACTIVE TEST [09/2014 - ]
- Enter the following menus: Body Electrical / Active Rear Wing / Data List.
  Refer to DATA LIST / ACTIVE TEST [09/2014 - ]