Diagnostic Test
- 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 DTC INDEX and perform the U0155-Lost Communication with Cluster/CCN - Missing Message diagnostic procedure.
No
- Refer to DIAGNOSIS AND TESTING and perform the Stored Lost Communication DTCs diagnostic procedure.