FCM - PCM Messages Not Received

Tests 1 - 3:

SYMPTOM
FCM - PCM MESSAGES NOT RECEIVED

WHEN MONITORED
With the ignition ON.

SET CONDITION
The FCM does not receive any messages from the PCM for at least 5 seconds.

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