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
- Perform the U0103-LOST COMMUNICATION WITH ELECTRONIC SHIFT MODULE (ESM) diagnostic procedure. Refer to DTC INDEX .
No
- Refer to STORED LOST COMMUNICATION DTCS and perform the STORED LOST COMMUNICATION DTCS diagnostic procedure.