M–78
ON-BOARD DIAGNOSTIC
End Of Sie
3 INSPECT 4WD SOLENOID TO 4WD CM
(POWER SUPPLY CIRCUIT) FOR SHORT TO
GROUND
• Inspect for continuity between 4WD CM
terminal O and ground.
• Is there continuity?
Yes Repair or replace harness for short to ground between 4WD
CM and 4WD solenoid, then go to Step 9.
No Go to next step.
4 INSPECT 4WD SOLENOID TO 4WD CM
(GROUND CIRCUIT) FOR OPEN CIRCUIT
• Inspect for continuity between 4WD CM
terminal P and 4WD solenoid terminal A.
• Is there continuity?
Yes Replace 4WD CM, then go to next step.
No Repair or replace harness for open circuit between 4WD CM
and 4WD solenoid, then go to Step 9.
5 INSPECT 4WD CM POWER SUPPLY CIRCUIT
FOR OPEN CIRCUIT
• Measure voltage between 4WD CM terminal
K and ground.
• Is voltage B+?
Yes Replace 4WD CM, then go to Step 9.
No Go to next step.
6 INSPECT 4WD CM TO BATTERY FOR OPEN
CIRCUIT
• Disconnect 4WD CM connector and battery
positive terminal.
• Inspect for continuity between 4WD CM
terminal K and battery positive terminal.
• Is there continuity?
Yes Go to next step.
No Repair or replace harness for open circuit between 4WD CM
and battery positive terminal, then go to Step 9.
7 INSPECT 4WD CM TO BATTERY FOR SHORT
TO GROUND
• Inspect for continuity between 4WD CM
terminal K and ground.
• Is there continuity?
Yes Repair or replace harness for short to ground between 4WD
CM and battery positive terminal, then go to Step 9.
No Replace 4WD CM, then go to step 9.
8 INSPECT FUSE CONDITION
• Turn ignition key to OFF.
• Is ENG+B fuse (10A) okay?
Yes Go to next step.
No Replace fuse, then go to Step 9.
9 VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from memory.
(See M–76 Clearing DTCs Procedures)
• Drive vehicle.
• Is the same DTC present?
Yes Replace 4WD CM, then go to next step.
No Go to next step.
10 VERIFY AFTER REPAIR PROCEDURE
• Is there any other DTC present?
Yes Go to applicable DTC inspection.
No Troubleshooting completed.
STEP INSPECTION ACTION
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