4WD Shift Indicator Lamp And 4LO Indicator Lamp Do Not Turn ON

4WD SHIFT INDICATOR LAMP AND 4LO INDICATOR LAMP DO NOT TURN ON


Description

4WD shift indicator lamp and 4LO indicator lamp do not turn ON for approx. 1 second when turning ignition switch to ON.





4WD SHIFT INDICATOR LAMP AND 4LO INDICATOR LAMP DO NOT TURN ON


Diagnosis Procedure

Regarding Wiring Diagram information, [1][2]Electrical Diagrams.
1.CHECK TRANSFER CONTROL UNIT POWER SUPPLY AND GROUND CIRCUITS
P1811.
Are the inspection results normal?
YES - GO TO 2.
NO - Repair as necessary.
2.CHECK COMBINATION METER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect combination meter harness connector.





3. Check voltage between combination meter harness connector terminal and ground.










4. Turn ignition switch ON. (Do not start engine.)
5. Check voltage between combination meter harness connector terminal and ground.






Are the inspection results normal?
YES - GO TO 3.
NO - Check the following. If any items are damaged, repair or replace damaged parts.
- 10A fuse [No. 14 located in the fuse block (J/B)].
- Harness for short or open between battery and combination meter harness connector M24 terminal 24.
- Ignition switch.
3.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector.





3. Check continuity between the following terminals.
- Transfer control unit harness connector E142 terminal 2 and combination meter harness connector M24 terminal 32.
- Transfer control unit harness connector E142 terminal 11 and combination meter harness connector M24 terminal 31.
- Transfer control unit harness connector E142 terminal 12 and combination meter harness connector M24 terminal 33.
- Transfer control unit harness connector E142 terminal 21 and combination meter harness connector M24 terminal 30.

Continuity should exist.

Also check harness for short to ground and short to power.
Are the inspection results normal?
YES - GO TO 4.
NO - Repair or replace damaged parts.
4.CHECK INDICATOR LAMP CIRCUIT
1. Connect combination meter harness connector.
2. Turn ignition switch ON.





3. Ground the following terminals using suitable wiring.
- Transfer control unit harness connector E142 terminal 2 and ground.
- Transfer control unit harness connector E142 terminal 11 and ground.
- Transfer control unit harness connector E142 terminal 12 and ground.
- Transfer control unit harness connector E142 terminal 21 and ground.
Do indicator lamps turn on?
YES - GO TO 5.
NO - Replace combination meter. Refer to Service and Repair".
5.SYMPTOM CHECK
Check again.
Are the inspection results normal?
YES - Inspection End.
NO - GO TO 6.
6.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Pinout Values and Diagnostic Parameters.
Are the inspection results normal?
YES - Inspection End.
NO - Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.