Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY CHECK FOR AN ACTIVE DTC

NOTE:

Make sure the IOD fuse is installed and the battery is fully charged before proceeding.

Turn the ignition on.
With the scan tool, read DTCs.
Is this DTC active?

Yes
- Refer to DIAGNOSIS AND TESTING and perform the U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM) diagnostic procedure.
No
- Refer to DIAGNOSIS AND TESTING and perform the STORED LOST COMMUNICATION DTCs diagnostic procedure.