No Response From TCM

SYMPTOM LIST
* NO RESPONSE FROM TCM

TEST NOTE All symptoms listed above are diagnosed using the same tests. The title for the tests will be EATX PRNDL MESSAGE TEST FAILED.

WHEN MONITORED
When engine is running.

SET CONDITION
The engine is running above 450 rpm and the body control module has not received a transmission PRNDL message.

POSSIBLE CAUSES
- No response TCM bus (+) CKT open
- NO response TCM bus(-) CKT open
- No response BCM/TCM bus (-) open
- No response BCM/TCM bus(+) open
- No response TCM default