Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY DTC IS ACTIVE

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 active DTCs.
Is this DTC active?

Yes
- Refer to U0155-87-LOST COMMUNICATION WITH CLUSTER/CCN - MISSING MESSAGE and perform the U0155-Lost Communication with Cluster/CCN - Missing Message diagnostic procedure.
No
- Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.