Lexus NX: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use the following procedure to troubleshoot the AFS (front-lighting adaptive system).
  • *: Use the Techstream

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK

NEXT

3.

INSPECT AUXILIARY BATTERY

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

Standard voltage:

11 to 14 V

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

NEXT

4.

CHECK CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Click here

Result

Proceed to

CAN communication system DTCs are not output

A

CAN communication system DTCs are output

B

B

GO TO CAN COMMUNICATION SYSTEM

A

5.

CHECK FOR DTC*

(a) Check for DTCs.

Click here

Body Electrical > AFS > Trouble Codes

(b) Clear the DTCs.

Click here

Body Electrical > AFS > Clear DTCs

(c) Recheck for DTCs.

Click here

Body Electrical > AFS > Trouble Codes

Result

Proceed to

DTC output does not reoccur

A

DTC output reoccurs

B

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

6.

PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result

Proceed to

Fault is not listed in Problem Symptoms Table

A

Fault is listed in Problem Symptoms Table

B

B

ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE

A

7.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check.

Click here

(b) Terminals of ECU.

Click here

(c) Data List / Active Test.

Click here

NEXT

8.

ADJUST, REPAIR OR REPLACE

NEXT

9.

CONFIRMATION TEST

NEXT

END

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