Diagnostic Test

VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE

NOTE:

Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

Turn the ignition on.
With the scan tool, read ORC DTCs.
Does the scan tool display active U0101-LOST COMMUNICATION WITH TCM DTC?

Yes
- Refer to the TIPM DIAGNOSTIC CODE INDEX and perform the U0101-Lost Communication with TCM diagnostic procedure.
No
- Perform the Stored Lost Communication DTCs diagnostic procedure. Refer to STORED LOST COMMUNICATION DTCS .