PCM Communication Failure (Active)

Test 1:

Tests 2 - 3:

SYMPTOM
PCM COMMUNICATION FAILURE (ACTIVE) - MANUAL A/C

TEST NOTE
This symptom is diagnosed using the test 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 receive the Fuel message 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