DTC U1002: Lost Communication with Gateway Module (Network Gateway ECU) [09/2014 - 10/2015]: Procedure

CHECK SUB BUS

Disconnect the cable from the negative (-) battery terminal.

Measure the resistance according to the value(s) in the table below.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component with harness connected (Network Gateway ECU)

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
O46-13 (CA2H) - O46-12 (CA2L)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	Below 54 Ω: Short circuit between bus lines
O46-13 (CA2H) - O46-12 (CA2L)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	70 Ω or higher: Open circuit in main bus lines
O46-13 (CA2H) - O46-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground
O46-12 (CA2L) - O46-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground
O46-13 (CA2H) - O46-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
O46-12 (CA2L) - O46-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

Result

Result	Proceed to
OK	A
Open circuit in CAN main bus lines	B
Short circuit between bus lines	C
Short to ground +B short	D

Result:

See step 3

Result:

See step 9

Result:

See step 16

Result:

See step 2

CHECK FOR DTC OUTPUT

Reconnect the cable to the negative (-) battery terminal.
Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Clear the DTCs.
Body Electrical > Gateway > Clear DTCs
Turn the engine switch off.
Turn the engine switch on (IG).

Check for DTCs.

Body Electrical > Gateway > Trouble Codes

Result

Result	Proceed to
DTC U1002 is not output from network gateway ECU (Techstream display: Gateway)	A
DTC U1002 is output from network gateway ECU (Techstream display: Gateway)	B

Result:

SYMPTOM SIMULATION. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 10/2015]

Result:

REPLACE NETWORK GATEWAY ECU. Refer to REMOVAL [09/2014 - 11/2017]

CHECK FOR OPEN IN SUB BUS MAIN LINES (NETWORK GATEWAY ECU)

Disconnect the O46 network gateway ECU connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Network Gateway ECU)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
O46-13 (CA2H) - O46-12 (CA2L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE NETWORK GATEWAY ECU. Refer to REMOVAL [09/2014 - 11/2017]

Result:

See step 4

CHECK FOR OPEN IN SUB BUS MAIN LINES (NO. 2 CAN JUNCTION TERMINAL)

Reconnect the O46 network gateway ECU connector.

Disconnect the O102 No. 2 CAN junction terminal connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 2 CAN Junction Terminal)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
O102-3 (CANH) - O102-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE NO. 2 CAN JUNCTION TERMINAL

Result:

See step 5

CHECK FOR OPEN IN SUB BUS MAIN LINES (NO. 5 CAN JUNCTION CONNECTOR)

Reconnect the O102 No. 2 CAN junction terminal connector.

Disconnect the O108 No. 5 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 5 CAN Junction Connector)
*b	to No. 3 CAN Junction Connector
*c	to Network Gateway ECU

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
O108-9 (CANH) - O108-20 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 3 CAN junction connector
O108-10 (CANH) - O108-21 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Network gateway ECU

Result

Result	Proceed to
OK	A
NG (Network gateway ECU main lines)	B
NG (No. 3 CAN junction connector main lines)	C

Result:

REPLACE NO. 5 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NETWORK GATEWAY ECU - NO. 5 CAN JUNCTION CONNECTOR)

Result:

See step 6

CHECK FOR OPEN IN SUB BUS MAIN LINES (NO. 3 CAN JUNCTION CONNECTOR)

Reconnect the O108 No. 5 CAN junction connector.

Disconnect the O106 No. 3 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 3 CAN Junction Connector)
*b	to No. 5 CAN Junction Connector
*c	to No. 10 CAN Junction Connector

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
O106-7 (CANH) - O106-18 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 5 CAN junction connector
O106-8 (CANH) - O106-19 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 10 CAN junction connector

Result

Result	Proceed to
OK	A
NG (No. 5 CAN junction connector main lines)	B
NG (No. 10 CAN junction connector main lines)	C

Result:

REPLACE NO. 3 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

Result:

See step 7

CHECK FOR OPEN IN SUB BUS MAIN LINES (NO. 10 CAN JUNCTION CONNECTOR)

Reconnect the O106 No. 3 CAN junction connector.

Disconnect the W13 No. 10 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 10 CAN Junction Connector)
*b	to No. 3 CAN Junction Connector
*c	to No. 8 CAN Junction Connector

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
W13-1 (CANH) - W13-7 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 3 CAN junction connector
W13-2 (CANH) - W13-8 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 8 CAN junction connector

Result

Result	Proceed to
OK	A
NG (No. 3 CAN junction connector main lines)	B
NG (No. 8 CAN junction connector main lines)	C

Result:

REPLACE NO. 10 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

Result:

See step 8

CHECK FOR OPEN IN SUB BUS MAIN LINES (NO. 8 CAN JUNCTION CONNECTOR)

Reconnect the W13 No. 10 CAN junction connector.

Disconnect the U53 No. 8 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 8 CAN Junction Connector)
*b	to No. 10 CAN Junction Connector
*c	to No. 2 CAN Junction Terminal

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
U53-1 (CANH) - U53-12 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 10 CAN junction connector
U53-2 (CANH) - U53-13 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 2 CAN junction terminal

Result

Result	Proceed to
OK	A
NG (No. 10 CAN junction connector main lines)	B
NG (No. 2 CAN junction terminal main lines)	C

Result:

REPLACE NO. 8 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL)

CHECK FOR SHORT IN SUB BUS LINES (NETWORK GATEWAY ECU)

Disconnect the O46 network gateway ECU connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Network Gateway ECU)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
O46-13 (CA2H) - O46-12 (CA2L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE NETWORK GATEWAY ECU. Refer to REMOVAL [09/2014 - 11/2017]

Result:

See step 10

CHECK FOR SHORT IN SUB BUS LINES (NO. 2 CAN JUNCTION TERMINAL)

Reconnect the O46 network gateway ECU connector.

Disconnect the O102 No. 2 CAN junction terminal connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 2 CAN Junction Terminal)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
O102-3 (CANH) - O102-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE NO. 2 CAN JUNCTION TERMINAL

Result:

See step 11

CHECK FOR SHORT IN SUB BUS LINES (NO. 5 CAN JUNCTION CONNECTOR)

Reconnect the O102 No. 2 CAN junction terminal connector.

Disconnect the O108 No. 5 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 5 CAN Junction Connector)
*b	to Absorber Control ECU (w/ AVS System)
*c	to 4WD ECU Assembly (for AWD)
*d	to No. 3 CAN Junction Connector
*e	to Network Gateway ECU
*f	to Telematics Transceiver (for Lexus Enform Remote Compatible Type with VGRS System)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
O108-7 (CANH) - O108-18 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Absorber control ECU*1
O108-8 (CANH) - O108-19 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	4WD ECU assembly*2
O108-9 (CANH) - O108-20 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 3 CAN junction connector
O108-10 (CANH) - O108-21 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Network gateway ECU
O108-11 (CANH) - O108-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Telematics transceiver*3

*1: w/ AVS System
*2: for AWD
*3: for Lexus Enform Compatible Type with VGRS System

Result

Result	Proceed to
OK	A
NG (Network gateway ECU main lines)	B
NG (ECU or sensor branch lines)	C
NG (No. 3 CAN junction connector main lines)	D

Result:

REPLACE NO. 5 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NETWORK GATEWAY ECU - NO. 5 CAN JUNCTION CONNECTOR)

Result:

See step 15

Result:

See step 12

CHECK FOR SHORT IN SUB BUS LINES (NO. 3 CAN JUNCTION CONNECTOR)

Reconnect the O108 No. 5 CAN junction connector.

Disconnect the O106 No. 3 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 3 CAN Junction Connector)
*b	to No. 5 CAN Junction Connector
*c	to No. 10 CAN Junction Connector
*d	to Option Connector (Bus Buffer ECU)
*e	to Driving Support ECU Assembly (w/ Pre-collision System)
*f	to Clearance Warning ECU Assembly (w/ Intuitive Parking Assist System)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
O106-7 (CANH) - O106-18 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 5 CAN junction connector
O106-8 (CANH) - O106-19 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 10 CAN junction connector
O106-9 (CANH) - O106-20 (CANL)	Cable disconnected from negative (-) battery terminal	1 MΩ or higher	Option connector (bus buffer ECU)
O106-10 (CANH) - O106-21 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Driving support ECU assembly*1
O106-11 (CANH) - O106-22 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Clearance warning ECU assembly*2

*1: w/ Pre-collision System
*2: w/ Intuitive Parking Assist System

Result

Result	Proceed to
OK	A
NG (No. 5 CAN junction connector main lines)	B
NG (ECU or sensor branch lines)	C
NG (No. 10 CAN junction connector main lines)	D

Result:

REPLACE NO. 3 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

Result:

See step 15

Result:

See step 13

CHECK FOR SHORT IN SUB BUS LINES (NO. 10 CAN JUNCTION CONNECTOR)

Reconnect the O106 No. 3 CAN junction connector.

Disconnect the W13 No. 10 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 10 CAN Junction Connector)
*b	to No. 3 CAN Junction Connector
*c	to No. 8 CAN Junction Connector
*d	to Lane Departure Warning Camera (w/ Lane Departure Alert System)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
W13-1 (CANH) - W13-7 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 3 CAN junction connector
W13-2 (CANH) - W13-8 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 8 CAN junction connector
W13-3 (CANH) - W13-9 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Lane departure warning camera*

*: w/ Lane Departure Alert System

Result

Result	Proceed to
OK	A
NG (No. 3 CAN junction connector main lines)	B
NG (ECU or sensor branch lines)	C
NG (No. 8 CAN junction connector main lines)	D

Result:

REPLACE NO. 10 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

Result:

See step 15

Result:

See step 14

CHECK FOR SHORT IN SUB BUS LINES (NO. 8 CAN JUNCTION CONNECTOR)

Reconnect the W13 No. 10 CAN junction connector.

Disconnect the U53 No. 8 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 8 CAN Junction Connector)
*b	to No. 10 CAN Junction Connector
*c	to No. 2 CAN Junction Terminal
*d	to Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
U53-1 (CANH) - U53-12 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 10 CAN junction connector
U53-2 (CANH) - U53-13 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 2 CAN junction terminal
U53-3 (CANH) - U53-14 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Blind spot monitor sensor LH*

*: w/ Blind Spot Monitor System

Result

Result	Proceed to
OK	A
NG (No. 10 CAN junction connector main lines)	B
NG (ECU or sensor branch lines)	C
NG (No. 2 CAN junction terminal main lines)	D

Result:

REPLACE NO. 8 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL)

Result:

See step 15

CHECK FOR SHORT IN SUB BUS LINES (ECU, SENSOR)

Reconnect all wire harness connectors.
Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short circuited branch line is connected.
Refer to TERMINALS OF ECU [09/2014 - 10/2015]

Measure the resistance according to the value(s) in the table below.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component with harness connected (Network Gateway ECU)

Standard Resistance

Tester Connection	Condition	Specified Condition
O46-13 (CA2H) - O46-12 (CA2L)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

HINT:

If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.

Result

Result
OK
NG

Result:

REPLACE CORRESPONDING ECU OR SENSOR

Result:

REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINES OR CONNECTOR

CHECK FOR SHORT IN SUB BUS LINE (NO. 5 CAN JUNCTION CONNECTOR)

Disconnect the O108 No. 5 CAN junction connector.

Measure the resistance according to the value(s) in the table below.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	DLC3	-	-
*a	Front view of wire harness connector (to No. 5 CAN Junction Connector)	*b	to Absorber Control ECU (w/ AVS System)
*c	to 4WD ECU Assembly (for AWD)	*d	to No. 3 CAN Junction Connector
*e	to Network Gateway ECU	*f	to Telematics Transceiver (for Lexus Enform Remote Compatible Type with VGRS System)

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
O108-7 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	Absorber control ECU*1
O108-18 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	Absorber control ECU*1
O108-8 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	4WD ECU assembly*2
O108-19 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	4WD ECU assembly*2
O108-9 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	No. 3 CAN junction connector
O108-20 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	No. 3 CAN junction connector
O108-10 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	Network gateway ECU
O108-21 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	Network gateway ECU
O108-11 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	Telematics transceiver*3
O108-22 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	Telematics transceiver*3
O108-7 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Absorber control ECU*1
O108-18 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Absorber control ECU*1
O108-8 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	4WD ECU assembly*2
O108-19 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	4WD ECU assembly*2
O108-9 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	No. 3 CAN junction connector
O108-20 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	No. 3 CAN junction connector
O108-10 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Network gateway ECU
O108-21 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Network gateway ECU
O108-11 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Telematics transceiver*3
O108-22 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Telematics transceiver*3

*1: w/ AVS System
*2: for AWD
*3: for Lexus Enform Remote Compatible Type with VGRS System

HINT:

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus inspection.

Result

Result	Proceed to
OK	A
NG (Network gateway ECU main line)	B
NG (ECU or sensor branch line)	C
NG (No. 3 CAN junction connector main line)	D

Result:

REPLACE NO. 5 CAN JUNCTION CONNECTOR

Result:

See step 21

Result:

See step 18

Result:

See step 17

CHECK FOR SHORT IN SUB BUS LINE (NETWORK GATEWAY ECU)

Reconnect the O108 No. 5 CAN junction connector.

Disconnect the O46 network gateway ECU connector.

*a	Front view of wire harness connector (to Network Gateway ECU)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
O46-13 (CA2H) - O46-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground
O46-12 (CA2L) - O46-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground
O46-13 (CA2H) - O46-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
O46-12 (CA2L) - O46-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

HINT:

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus inspection.

Result

Result
OK
NG

Result:

REPLACE NETWORK GATEWAY ECU. Refer to REMOVAL [09/2014 - 11/2017]

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NETWORK GATEWAY ECU - NO. 5 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS LINE (NO. 3 CAN JUNCTION CONNECTOR)

Reconnect the O108 No. 5 CAN junction connector.
Disconnect the O106 No. 3 CAN junction connector.

Measure the resistance according to the value(s) in the table below.

*1	DLC3	-	-
*a	Front view of wire harness connector (to No. 3 CAN Junction Connector)	*b	to No. 5 CAN Junction Connector
*c	to No. 10 CAN Junction Connector	*d	to Option Connector (Bus Buffer ECU)
*e	to Driving Support ECU Assembly (w/ Pre-collision System)	*f	to Clearance Warning ECU Assembly (w/ Intuitive Parking Assist System)

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
O106-7 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	No. 5 CAN junction connector
O106-18 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	No. 5 CAN junction connector
O106-8 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	No. 10 CAN junction connector
O106-19 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	No. 10 CAN junction connector
O106-9 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	Option connector (bus buffer ECU)
O106-20 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	Option connector (bus buffer ECU)
O106-10 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	Driving support ECU assembly*1
O106-21 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	Driving support ECU assembly*1
O106-11 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	Clearance warning ECU assembly*2
O106-22 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	Clearance warning ECU assembly*2
O106-7 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	No. 5 CAN junction connector
O106-18 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	No. 5 CAN junction connector
O106-8 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	No. 10 CAN junction connector
O106-19 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	No. 10 CAN junction connector
O106-9 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Option connector (bus buffer ECU)
O106-20 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Option connector (bus buffer ECU)
O106-10 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Driving support ECU assembly*1
O106-21 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Driving support ECU assembly*1
O106-11 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Clearance warning ECU assembly*2
O106-22 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Clearance warning ECU assembly*2

*1: w/ Pre-collision System
*2: w/ Intuitive Parking Assist System

HINT:

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus inspection.

Result

Result	Proceed to
OK	A
NG (ECU or sensor branch line)	B
NG (No. 5 CAN junction connector main line)	C
NG (No. 10 CAN junction connector main line)	D

Result:

REPLACE NO. 3 CAN JUNCTION CONNECTOR

Result:

See step 21

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

Result:

See step 19

CHECK FOR SHORT IN SUB BUS LINE (NO. 10 CAN JUNCTION CONNECTOR)

Reconnect the O106 No. 3 CAN junction connector.
Disconnect the W13 No. 10 CAN junction connector.

Measure the resistance according to the value(s) in the table below.

*1	DLC3	-	-
*a	Front view of wire harness connector (to No. 10 CAN Junction Connector)	*b	to No. 3 CAN Junction Connector
*c	to No. 8 CAN Junction Connector	*d	to Lane Departure Warning Camera (w/ Lane Departure Alert System)

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
W13-1 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	No. 3 CAN junction connector
W13-7 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	No. 3 CAN junction connector
W13-2 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	No. 8 CAN junction connector
W13-8 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	No. 8 CAN junction connector
W13-3 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	Lane departure warning camera*
W13-9 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	Lane departure warning camera*
W13-1 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	No. 3 CAN junction connector
W13-7 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	No. 3 CAN junction connector
W13-2 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	No. 8 CAN junction connector
W13-8 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	No. 8 CAN junction connector
W13-3 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Lane departure warning camera*
W13-9 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Lane departure warning camera*

*: w/ Lane Departure Alert System

HINT:

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus inspection.

Result

Result	Proceed to
OK	A
NG (ECU or sensor branch line)	B
NG (No. 3 CAN junction connector main line)	C
NG (No. 8 CAN junction connector main line)	D

Result:

REPLACE NO. 10 CAN JUNCTION CONNECTOR

Result:

See step 21

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

Result:

See step 20

CHECK FOR SHORT IN SUB BUS LINE (NO. 8 CAN JUNCTION CONNECTOR)

Reconnect the W13 No. 10 CAN junction connector.
Disconnect the U53 No. 8 CAN junction connector.

Measure the resistance according to the value(s) in the table below.

*1	DLC3	-	-
*a	Front view of wire harness connector (to No. 8 CAN Junction Connector)	*b	to No. 10 CAN Junction Connector
*c	to No. 2 CAN Junction Terminal	*d	to Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System)

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
U53-1 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	No. 10 CAN junction connector
U53-12 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	No. 10 CAN junction connector
U53-2 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	No. 2 CAN junction terminal
U53-13 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	No. 2 CAN junction terminal
U53-3 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground	Blind spot monitor sensor LH*
U53-14 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground	Blind spot monitor sensor LH*
U53-1 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	No. 10 CAN junction connector
U53-12 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	No. 10 CAN junction connector
U53-2 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	No. 2 CAN junction terminal
U53-13 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	No. 2 CAN junction terminal
U53-3 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Blind spot monitor sensor LH*
U53-14 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Blind spot monitor sensor LH*

*: w/ Blind Spot Monitor System

HINT:

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus inspection.

Result

Result	Proceed to
OK	A
NG (No. 10 CAN junction connector main line)	B
NG (ECU or sensor branch line)	C
NG (No. 2 CAN junction terminal main line)	D

Result:

REPLACE NO. 8 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

Result:

See step 22

Result:

See step 21

CHECK FOR SHORT IN SUB BUS LINE (ECU, SENSOR)

Reconnect all wire harness connectors.
Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus line shorted to +B or shorted to GND is connected.
Refer to TERMINALS OF ECU [09/2014 - 10/2015]

Measure the resistance according to the value(s) in the table below.

*a	Component with harness connected (Network Gateway ECU)

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
O46-13 (CA2H) - O46-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground
O46-12 (CA2L) - O46-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground
O46-13 (CA2H) - O46-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
O46-12 (CA2L) - O46-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

HINT:

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus inspection.
If the resistance becomes normal when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus inspection.

Result

Result
OK
NG

Result:

REPLACE CORRESPONDING ECU OR SENSOR

Result:

REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINE OR CONNECTOR

CHECK FOR SHORT IN SUB BUS LINE (NO. 2 CAN JUNCTION TERMINAL)

Reconnect the U53 No. 8 CAN junction connector.

Disconnect the O102 No. 2 CAN junction terminal connector.

*1	DLC3
*a	Front view of wire harness connector (to No. 2 CAN Junction Terminal)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
O102-3 (CANH) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH short to ground
O102-2 (CANL) - O8-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL short to ground
O102-3 (CANH) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
O102-2 (CANL) - O8-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

HINT:

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus inspection.

Result

Result
OK
NG

Result:

REPLACE NO. 2 CAN JUNCTION TERMINAL

Result:

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION TERMINAL)