PCM Communication Failure (Stored)

Test 1:

SYMPTOM
PCM COMMUNICATION FAILURE (STORED)

TEST NOTE
This symptom is diagnosed using the test A/C SWITCH FAULT (STORED).

WHEN MONITORED
With the ignition ON.

SET CONDITION
This DTC Will set if the A/C - Heater Control Module does not receive any one of the following messages from the PCM for more than 8 seconds: Engine RPM, Vehicle Speed.

POSSIBLE CAUSES
- Check for active HVAC DTCS, and cooldown test and door recalibration messages
- Stored code(s) test complete