Inspection Procedure 4

INSPECTION PROCEDURE 4: More Than Two ACD MODE Indicator Lights Remain Lit Even After The Engine Is Started









CIRCUIT OPERATION
The AWD-ECU displays a control mode (tarmac, gravel, snow) on the ACD mode indicator light on the combination meter.

COMMENT
The output circuit of the ACD mode indicator light may be faulty.

TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CONDITION:)
^ Damaged harness and connector
^ Malfunction of the ACD mode indicator light assembly
^ Malfunction of the AWD-ECU

DIAGNOSIS
STEP 1. Check the ACD mode indicator light illumination.





1. Disconnect the AWD-ECU connector C-138.
2. Turn the ignition switch to the ON position.
3. The ACD mode indicator light does not illuminate.
4. Turn the ignition switch to the LOCK (OFF) position.
Q: Is the ACD mode indicator light not illuminate?
YES: Replace the AWD-ECU.
NO: Go to Step 2.

STEP 2. Check combination meter connector C-01, intermediate connector C-137 and AWD-ECU connector C-138 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q: Are the connectors and terminals in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged components.

STEP 3. Check the harness for open circuit short circuit between combination meter connector C-01 (terminals 10, 14, 15) and AWD-ECU connector C-138 (terminals 40, 52, 51).





Q: Is the harness wire in good condition?
YES: Replace the ACD mode indicator light assembly.
NO: Repair or replace the harness wire.