How To Proceed With Troubleshooting [12/2017 - 10/2020]: Procedure

VEHICLE BROUGHT TO WORKSHOP
Result

Proceed to

NEXT

Result:

NEXT

See step 2

CUSTOMER PROBLEM ANALYSIS

When troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.

The following 5 items are important points for problem analysis:

What	Vehicle model, system name
When	Date, time, occurrence frequency
Where	Road conditions
Under what conditions?	Driving conditions, weather conditions
How did it happen?	Problem symptoms

Result

Proceed to
NEXT

Result:

See step 3

INSPECT BATTERY VOLTAGE

Measure the battery voltage.

Standard voltage

11 to 14 V

HINT:

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

Result

Proceed to
NEXT

Result:

See step 4

CHECK CABIN

Check that condensation is not likely to occur in the cabin and that the temperature is not high or extremely low in the cabin.

Condensation is not likely being produced and the temperature is not high or extremely low.

HINT:

A humid cabin and a rapid change in temperature may lead to condensation. Condensation in the cabin may cause a short circuit.
The navigation system may not operate normally when the temperature is -20°C (-4°F) or lower, or 65°C (149°F) or higher.

Result

Proceed to
OK
NG

Result:

SET CABIN TO APPROPRIATE TEMPERATURE

Result:

See step 5

CHECK NAVIGATION SYSTEM NORMAL CONDITION

Refer to Check System Normal Condition.

Refer to OPERATION CHECK [12/2017 - 10/2020]

Result

Result	Proceed to
Symptom is not normal operation.	A
Symptom is normal operation.	B

Result:

SYMPTOM IS NORMAL OPERATION

Result:

See step 6

CHECK CAN COMMUNICATION SYSTEM*

Check if CAN communication system DTCs are output.

Refer to DIAGNOSIS SYSTEM [12/2017 - 09/2018] , or refer to DIAGNOSIS SYSTEM [09/2018 - 09/2019] , or refer to DIAGNOSIS SYSTEM [09/2019 - 10/2020]

Result

Result	Proceed to
CAN DTCs are not output.	A
CAN DTCs are output.	B

Result:

GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020]

Result:

See step 7

CHECK FOR DTC*

Refer to DTC Check / Clear.

Refer to DTC CHECK / CLEAR [12/2017 - 10/2020]

Body Electrical > Navigation System > Trouble Codes

HINT:

Following DTC will not continue to output when clear DTC is performed even if the malfunction is continuing. Therefore, refer to the troubleshooting flowchart before clearing the DTC when the following DTC is output.

B1323
B1324
B1325
B1326

Result

Result	Proceed to
DTCs other than B1323, B1324, B1325 or B1326 are output.	A
DTCs B1323, B1324, B1325 or B1326 is output.	B
DTCs are not output.	C

Result:

GO TO DTC B1323. Refer to DTC B1323: Lost Communication with Haptic Device; DTC B1324: Lost Communication with Meter; DTC B1325: Lost Communication with HUD; DTC B1326: Lost Communication with Clock Device (Local-CAN) [12/2017 - 10/2020]

Result:

See step 11

Result:

See step 8

DTC CLEAR*

Refer to DTC Check / Clear.

Refer to DTC CHECK / CLEAR [12/2017 - 10/2020]

Body Electrical > Navigation System > Clear DTCs

HINT:

The present DTCs may not indicate actual malfunctions depending on the vehicle operating conditions.

Result

Proceed to
NEXT

Result:

See step 9

RECHECK FOR DTC*

Refer to DTC Check / Clear.

Refer to DTC CHECK / CLEAR [12/2017 - 10/2020]

HINT:

Even if the malfunction symptom is not confirmed, check for DTCs. This is because the system stores history DTCs.
If more information is needed, perform a recheck using the "System Check Mode" screen after rechecking for DTCs using the Techstream.
Check the DTCs and inspect the area that the code indicates.

Body Electrical > Navigation System > Trouble Codes

Result

Result	Proceed to
DTCs are output.	A
DTCs are not output.	B

Result:

See step 11

Result:

See step 10

DIAGNOSTIC TROUBLE CODE CHART

*1: w/ Parking Assist Monitor System
*2: w/ Panoramic View Monitor System
*3: w/ Rear Seat Entertainment System

Find the output code in Diagnostic Trouble Code Chart.

Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2017 - 10/2020]

NOTE:

The navigation system outputs DTCs for the following systems.
When DTCs other than those in Diagnostic Trouble Code Chart for the navigation system are output, refer to Diagnostic Trouble Code Chart for the relevant system.
Refer to Parking Assist Monitor System*1
Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2017 - 10/2020]
Refer to Panoramic View Monitor System*2
Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2017 - 09/2018] , or refer to DIAGNOSTIC TROUBLE CODE CHART [09/2018 - 09/2019] , or refer to DIAGNOSTIC TROUBLE CODE CHART [09/2019 - 10/2020]
Refer to Safety Connect System
Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2017 - 10/2020]
Refer to Lexus Enform System
Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2017 - 10/2020]
Refer to Rear Seat Entertainment System*3
Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2017 - 10/2022]

Result

Result	Proceed to
DTCs for the parking assist monitor system are output.	A
DTCs for the panoramic view monitor system are output.	B
DTCs for the safety connect system are output.	C
DTCs for the LEXUS Enform system are output.	D
DTCs for the rear seat entertainment system are output.	E
DTCs for the navigation system are output.	F

Result:

GO TO PARKING ASSIST MONITOR SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 10/2020]

Result:

GO TO PANORAMIC VIEW MONITOR SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 10/2020]

Result:

GO TO SAFETY CONNECT SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 10/2020]

Result:

GO TO LEXUS ENFORM SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 10/2020]

Result:

GO TO REAR SEAT ENTERTAINMENT SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 10/2022]

Result:

See step 13

PROBLEM SYMPTOMS TABLE

Refer to Problem Symptoms Table.

Refer to PROBLEM SYMPTOMS TABLE [12/2017 - 09/2018] , or refer to PROBLEM SYMPTOMS TABLE [09/2018 - 10/2020]

Result

Result	Proceed to
Fault is not listed in Problem Symptoms Table.	A
Fault is listed in Problem Symptoms Table.	B

HINT:

If the symptom does not recur and no DTCs are output, attempt to reproduce the symptoms.

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020]

Result:

See step 13

Result:

See step 12

PERFORM TROUBLESHOOTING BASED ON MALFUNCTION SYMPTOM

Refer to Terminals of ECU.

Refer to TERMINALS OF ECU [12/2017 - 10/2020]

Result

Proceed to
NEXT

Result:

See step 13

CHECK CIRCUIT

Adjust, repair or replace as necessary.

Result

Proceed to
NEXT

Result:

See step 14

RECHECK FOR DTC

After clearing DTCs, recheck for DTCs.

Refer to DTC CHECK / CLEAR [12/2017 - 10/2020]

Body Electrical > Navigation System > Clear DTCs

Body Electrical > Navigation System > Trouble Codes

Result

Proceed to
NEXT

Result:

See step 15

PERFORM CONFIRMATION TEST
Result

Proceed to

NEXT

Result:

NEXT

END