Diagnostic Aids
If the power windows operate properly under retained accessory power (RAP) conditions and the radio or vehicle interface unit (VIU) do not operate properly, the condition exists in the class 2 circuit of the radio, VIU, or instrument panel cluster (IPC), or one of the individual modules. Refer to Scan Tool Does Not Communicate with Class 2 Device .
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Retained Accessory Power (RAP) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Do the power windows operate? | Go to Step 3 | Go to Step 4 |
3 | Repair the short to battery in the power windows feed circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 9 | -- |
4 | Using a test lamp connected to a battery positive voltage circuit, probe the RAP relay control circuit. Does the test lamp illuminate? | Go to Step 6 | Go to Step 5 |
5 | Replace the RAP relay. Did you complete the repair? | Go to Step 9 | -- |
6 | Test the RAP relay 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 9 | Go to Step 7 |
7 | Inspect for poor connections at the harness connector of the body control module (BCM). 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 9 | Go to Step 8 |
8 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement procedure? | Go to Step 9 | -- |
9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
