U1040

U1040-LOST COMMUNICATION WITH BODY CONTROL MODULE (BCM)

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

- When Monitored:
With the ignition on.

Battery voltage between 10 and 16 volts.

Body Control Module (BCM) is configured correctly.

- Set Condition:
This module has not received a Body Control Module (BCM) CAN Bus message for approximately two to five seconds.





ACTIVE DTC

NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.

1. Ignition on, engine not running.
2. With a scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Perform the U1040-00-Lost Communication with Body Control Module (BCM) diagnostic procedure.

No

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