Cabin Compartment Node (CCN)

U0164-LOST COMMUNICATION WITH HVAC CONTROL MODULE

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Continuously when the ignition is on.

Battery voltage between 10 and 16 volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

- Set Condition:
Bus messages not received from the HVAC Control Module for approximately two to five seconds.





VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE

NOTE: Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

1. With the scan tool, read active Cluster DTCs.

Is this DTC active?

Yes

- Totally Integrated Power Module (TIPM) Perform the U0164-Lost Communication with HVAC Control Module diagnostic procedure.

No

- Stored Lost Communication DTCsPerform the Stored Lost Communication DTCs diagnostic procedure.