Test Description
The numbers below refer to the step numbers on the diagnostic table.
- 2: Tests for an open in the body control module (BCM) battery positive voltage circuits and the ignition voltage circuits.
- 3: Tests for an open in the BCM ground circuits.
Cannot Enter BCM Diagnostics
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Body Control System Schematics Connector End View Reference: Computer/Integrating Systems Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Test the battery positive voltage circuits, the ignition voltage input circuits and the ignition voltage output circuits of the body control module (BCM) for an open or short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Diagnostic System Check - Vehicle in Vehicle DTC Information | Go to Step 3 |
| 3 | Test the ground circuits of the BCM for an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Diagnostic System Check - Vehicle in Vehicle DTC Information | Go to Step 4 |
| 4 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Diagnostic System Check - Vehicle in Vehicle DTC Information | Go to Step 5 |
| 5 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Is the repair complete? |
Diagnostic System Check - Vehicle in Vehicle DTC Information | - |