No PCM Messages Received (Active)

Test 1:

Tests 2 - 3:

SYMPTOM
NO PCM MESSAGE RECEIVED (ACTIVE) - MANUAL A/C

WHEN MONITORED
With the ignition ON.

SET CONDITION
This DTC will. set if the A/C - Heater Control Module does not see any messages from the PCM for more than 5 seconds.

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