NO.2 4x4/4L INDICATOR DOSE NOT ILLUMINATE [WL-C, WE-C (AT)]

id0303c3802600

2
4x4/4L INDICATOR DOSE NOT ILLUMINATE
DESCRIPTION
4x4/4L indicator dose not illuminate when select 4H or 4L position.
TROUBLESHOOTING HINTS
•  Instrument cluster malfunction
•  TCM malfunction
•  4x4 control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT CONTINUITY FOR 4x4 CONTROL MODULE AND TCM
•  Between 4x4 control module terminal S and TCM terminal BB.
•  Between 4x4 control module terminal R and TCM terminal BA.
•  Is there continuity?
Yes
Go to next step.
No
Repair wiring harness between 4x4 control module terminal and TCM.
Then go to Step 5.
2
INSPECT CONTINUITY FOR TCM AND INSTRUMENT CLUSTER
•  Between TCM terminal N and instrument cluster terminal 1D.
•  Between TCM terminal R and instrument cluster terminal 1F.
•  Is there continuity?
Yes
Inspect the instrument cluster.
Then go to next step.
No
Repair wiring harness between TCM and instrument cluster.
Then go to Step 5.
3
INSPECT FOR CONTINUITY BETWEEN 4x4 CONTROL MODULE CONNECTOR TERMINAL W, X AND GROUND
•  Turn engine switch OFF.
•  Is there continuity?
Yes
Go to next step.
No
Repair wiring harness between 4x4 control module and ground.
Then go to Step 5.
4
MEASURE VOLTAGE BETWEEN 4x4 CONTROL MODULE CONNECTOR TERMINAL T, Y, Z AND GROUND
•  Turn engine switch ON.
•  Is the voltage greater than 10 V?
Yes
Go to next step.
No
Repair related wiring harness and related fuses.
Then go to Step 5.
5
•  Verify test results.
―  If normal, return to the diagnostic index to service any additional symptoms.
―  If malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.
•  If the vehicle is repaired, troubleshooting completed.
•  If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM.