Auto Temp Control Module No Response, ATC Messages Not Received
NAME OF CODEATC Messages Not Received
WHEN MONITORED
With ignition on
SET CONDITION
BCM has not received any PCI bus messages from the Automatic Temperature Control (ATC) head for at least 18 seconds.
THEORY OF OPERATION
BCM receives a variety of information from the ATC over the PCI bus. If the flow of information is stopped for over 18 seconds, the BCM will set this fault.
PROBABLE CAUSES
- Wiring open circuit
- Wiring short to ground
- Wiring short to battery
- Failed ATC
- Failed BCM