Step | Action | Yes | No |
|---|---|---|---|
DEFINITION: The 4WD indicator does not illuminate with 4WD engaged. All other engine and transmission functions are normal. Refer to: Electric Motor and Actuator Check in Driveline/Axle-Front Axle (w/diff). | |||
1 | Did you review the transfer case operation and perform the necessary inspections? | Go to Step 2 | Go to Transfer Case Diagnostic System Check |
2 | With the engine on, place the transfer case into 4WD. Does the 4WD indicator illuminate? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 | Test the 4WD indicator control circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
4 | Replace the PCM. Refer to PCM Replacement in Engine Controls. Did you complete the repair? | Go to Step 5 | -- |
5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
