No Communication With Body Control Module and Central Locking Pump/Security System

NO COMMUNICATION WITH BODY CONTROL MODULE AND CENTRAL LOCKING PUMP/SECURITY SYSTEM

No Communication With Body Control Module And Central Locking Pump/Security System Module:

WHEN MONITORED
Continuous.

SET CONDITION
CAN Bus communication failure between the Body Control Module (BCM) and the Central Locking Pump/Security System Module (CLP/SSM).

POSSIBLE CAUSES
- CAN B BUS (+) circuit open
- CAN B BUS (-) circuit open
- Central locking pump/security system module internal failure

DIAGNOSTIC TEST

1. MEASURE THE RESISTANCE OF THE CAN B BUS (+) CIRCUIT




Turn the ignition off.
Disconnect the CLP/SSM C1 harness connector.
Disconnect the BCM harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance of the CAN B Bus (+) circuit from the CLP/SSM C1 harness connector to the BCM harness connector.

Q: Is the resistance below 1.0 ohm?

YES: Go to 2
NO: Repair the CAN B Bus (+) circuit for an open. Perform BODY VERIFICATION TEST. Body Verification Test

2. MEASURE THE RESISTANCE OF THE CAN B BUS (-) CIRCUIT




Measure the resistance of the CAN B Bus (-) circuit from the CLP/SSM C1 harness connector to the BCM harness connector.

Q: Is the resistance below 1.0 ohm?

YES: Replace the Central Locking Pump/Security System Module. Perform BODY VERIFICATION TEST. Body Verification Test
NO: Repair the CAN B Bus (-) circuit for an open. Perform BODY VERIFICATION TEST. Body Verification Test