PCM Messages Not Received

Test 1 - 3:

SYMPTOM
PCM MESSAGES NOT RECEIVED

WHEN MONITORED
With the ignition in run.

SET CONDITION
The module does not receive any messages from the PCM. Time to mature for the BCM, DDM and PDM is 5 seconds. Time to mature for the IPM is 2 seconds.

POSSIBLE CAUSES
- PCM messages not received
- Attempt to communicate with the PCM
- PCI BUS circuit open
- Powertrain control module