ATC Module Messages Not Received

Test 1-2:

SYMPTOM
ATC MODULE MESSAGES NOT RECEIVED

WHEN MONITORED
With the ignition in run, and the IOD fuse installed.

SET CONDITION
The BCM does not receive any messages from the Automatic Temperature Control (ATC) module for at least 0.125 seconds.

POSSIBLE CAUSES
- Attempt to communicate with the automatic temperature control module
- Body control module