Diagnostic Test

WARNING: This page is about a different car, the 2021 Jeep Grand Cherokee L. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY DTC IS ACTIVE

Turn the ignition on.
With the scan tool, read the active DTCs.
Does the scan tool display; U0140-00-LOST COMMUNICATION WITH BODY CONTROL MODULE as active?

Yes
- Refer to NO RESPONSE FROM ECU and perform the NO RESPONSE FROM BCM (BODY CONTROL MODULE) diagnostic procedure.
No
- Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.