PCM Communication Failure (Active)

Test 1 - 3:

SYMPTOM
PCM COMMUNICATION FAILURE (ACTIVE)

TEST NOTE
This symptom is diagnosed using the test ENGINE GAUGE RX FAILURE (ACTIVE).

WHEN MONITORED
With the ignition on.

SET CONDITION
This DTC Will set if the A/C - Heater Control Module does not receive the message from the PCM for more than 5 seconds. This message provides Engine RPM and Vehicle Speed.

POSSIBLE CAUSES
- Check for additional HVAC DTCs
- Check for PCM DTCs
- A/C - Heater control module
- PCM - No message to A/C - Heater control module