PCM Communication Failure (Active)

Tests 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 any one of the following messages from the PCM for more than 8 seconds: Engine RPM, 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