Body Control Module Internal Failure

Body Control Module Internal Failure:

WHEN MONITORED
Continuous.

SET CONDITION
If the Body Control Module (BCM) detects an internal malfunction, the DTC is set.

POSSIBLE CAUSES
- No power to body control module
- Body control module

Diagnostic Test




1. MEASURE THE VOLTAGE OF THE BCM POWER CIRCUIT

Turn the ignition off.
Disconnect the BCM harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Measure the voltage of the Fused B(+) circuit (cavity 75) at the BCM C4 harness connector.

Q: Is the voltage between 12 and 16 volts?

YES: Go to 2
NO: System voltage must be between 12 and 16 volts. Repair the voltage concern as necessary. Perform BODY VERIFICATION TEST. Body Verification Test




2. MEASURE THE VOLTAGE OF THE BCM POWER CIRCUIT

Measure the voltage of the Fused B(+) circuit (cavity 44) at the BCM C4 harness connector.

Q: Is the voltage between 12 and 16 volts?

YES: Go to 3
NO: System voltage must be between 12 and 16 volts. Repair the voltage concern as necessary. Perform BODY VERIFICATION TEST. Body Verification Test




3. MEASURE THE VOLTAGE OF THE BCM POWER CIRCUIT

Measure the voltage of the Fused B(+) circuit (cavity 4) at the BCM C4 harness connector.

Q: Is the voltage between 12 and 16 volts?

YES: Replace the Body Control Module. Perform BODY VERIFICATION TEST. Body Verification Test
NO: System voltage must be between 12 and 16 volts. Repair the voltage concern as necessary. Perform BODY VERIFICATION TEST. Body Verification Test