Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Transfer Case Control Schematics DEFINITION: 4WD indicator illuminated when ignition is ON. Transfer case and axle pump operate normally. | |||
1 | Did you review the Transfer Case Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Transfer Case |
2 |
Does the 4WD indicator turn off? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Test the 4WD indicator control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 4 |
4 | Inspect for a poor connection at the harness connector of the Powertrain Control Module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 6 | Go to Step 5 |
5 | Replace the PCM. Refer to the following in Engine Controls: Did you complete the replacement? | Go to Step 6 | -- |
6 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
