Lexus NX: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use these procedures to troubleshoot the LIN communication system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

INSPECT AUXILIARY BATTERY VOLTAGE

(a) Measure the auxiliary battery voltage with the power switch off.

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.

NEXT

3.

CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check the CAN communication function to ensure that there are no malfunctions in the communication system.

Click here

DTCs output

GO TO CAN COMMUNICATION SYSTEM

No DTCs output

4.

CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

(a) Using the Techstream, check the LIN communication function to ensure that there are no malfunctions in the communication system.

DTCs output

GO TO DIAGNOSTIC TROUBLE CODE CHART

No DTCs output

5.

PROBLEM SYMPTOMS TABLE

(a) Refer to the Problem Symptoms Table.

Click here

Fault is listed in problem symptoms table

ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE

Fault is not listed in problem symptoms table

6.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Data List / Active Test

Click here

(b) Terminals of ECU

Click here

NEXT

7.

ADJUST, REPAIR OR REPLACE

NEXT

END

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 Problem Symptoms Table

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