No CCD Message From Body Control Module

WHEN MONITORED
Anytime the ignition is ON.

SET CONDITION
No CCD messages are received from the BCM for 30 seconds.

THEORY OF OPERATION
The PCM and BCM communicate across the CCD bus system.

- Information is needed from either module to operate their respective systems.

PROBABLE CAUSES
- Open CCD bus (+) or (-) circuit between the modules
- BCM not powered up
- Failed BCM
- Failed PCM