4WD Warning Lamp Does Not Turn Off

4WD WARNING LAMP DOES NOT TURN OFF

Inspection Procedure

SYMPTOM: DIFF LOCK indicator lamp does not turn ON when turning differential lock mode switch to "ON" after engine start.

DIAGNOSTIC PROCEDURE

1. CHECK DIFF LOCK INDICATOR LAMP
Confirm the DIFF LOCK indicator lamp proves out when ignition switch is turned ON.
Does DIFF LOCK indicator lamp turn ON?
YES >> GO TO 2.
NO >> Go to "Inspection Procedure".

2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to DLN-236, "DIFFERENTIAL LOCK CONTROL UNIT: Diagnosis Description". Scan Tool Testing and Procedures
Is any DTC detected by self-diagnosis?
YES >> Check the malfunctioning system. Refer to DLN-268, "DTC Index". DTC No. Index
NO >> GO TO 3.

3. CHECK DIFFERENTIAL LOCK MODE SWITCH OPERATION
Check differential lock mode switch. Refer to DLN-253, "Description". Differential Lock Mode Switch
Does the differential lock mode switch pass inspection?
YES >> GO TO 4.
NO >> Repair component, harness or connector.

4. CHECK DIFFERENTIAL LOCK CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Check differential lock control unit power supply and ground circuit. Refer to DLN-252, "DIFFERENTIAL LOCK CONTROL UNIT: Diagnosis Procedure". Power Supply and Ground Circuit
Is proper power and ground supplied?
YES >> Replace the differential lock control unit.
NO >> Repair harness or connector.