TCM Messages Not Received - MHSAPM

Test 1 - 2:

SYMPTOM
TCM MESSAGES NOT RECEIVED - MHSAPM

WHEN MONITORED
With the ignition in unlock.

SET CONDITION
The module does not receive any messages from the TCM. Time to mature for the MHSAPM is 5 seconds.

POSSIBLE CAUSES
- Attempt to communicate with the TCM
- Module