No CCD Message From TCM

Name of Code:
No CCD Messages From TCM

When Monitored:
With the engine running.

Set Condition:
No CCD messages are received from the TCM for 10 seconds.

Theory of Operation:
The PCM and TCM communicate across the CCD bus system. Information is needed from either module to operate their respective systems.

Possible Causes:
- Open COD bus (+) or (-) circuit between the modules
- TCM not powered up
- Failed TCM
- Failed PCM