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 the message from the PCM for more than 5 seconds. This message provides Engine RPM and Vehicle Speed.

POSSIBLE CAUSES
- Check for active HVAC DTC's and system test fault messages
- Stored code(s) test complete