No TCM Messages Received

Test 1-3:

Test 4-5:

SYMPTOM
NO TCM MESSAGES RECEIVED

WHEN MONITORED
With the ignition on.

SET CONDITION
The PRNDL display or Manual Shift Data message from NGC Transmission is missing.

POSSIBLE CAUSES
- Intermittent condition
- No communication with TCM
- PCI BUS CKT open to park assist module
- Park assist module