4WD Warning Light does not Come ON

MF1A TRANSFER / 4WD / AWD: ACTIVE TORQUE CONTROL 4WD SYSTEM: 4WD Warning Light does not Come ON

4WD Warning Light does not Come ON

DESCRIPTION

The 4WD control ECU is connected to the combination meter via the CAN communication system.
If the 4WD control ECU stores any DTCs which are related to the active torque control 4WD system, the 4WD warning light comes on in the combination meter.


WIRING DIAGRAM





INSPECTION PROCEDURE

Check the condition of each related circuit connector before troubleshooting Electronic Circuit Inspection Procedure.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM
(a) Check if the CAN communication system DTC is output.
Result:





HINT: When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

B -- REPAIR CAN COMMUNICATION SYSTEM
A -- Continue to next step.

2. INSPECT 4WD WARNING LIGHT




(a) Disconnect the 4WD control ECU connector.
(b) Turn the ignition switch to ON.




(c) Check that the 4WD warning light comes on.
OK:
4WD warning light comes on.
NG -- REPLACE COMBINATION METER
OK -- REPLACE 4WD CONTROL ECU