Diagnostic Test

READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR DTC TO RETURN 

1. Verify that the IOD fuse is installed and the battery is fully charged.
2. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
3. With the scan tool, run a vehicle Scan Report or record the Environmental Data related to the DTCs.
4. With the scan tool, erase all DTCs.
5. Turn the ignition off for a minimum of 10 seconds.
6. Turn the ignition on.
7. Using the Environmental Data or When Monitored Conditions, operate the vehicle within the conditions that set the DTC.
8. With the scan tool, read DTCs.

   Did the DTC return?

   Yes 

   • Perform the diagnostic procedure for DTC U0141. Refer to U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM) .

   No 

   • Perform the Stored Lost Communication DTCs diagnostic procedure. Refer to STORED LOST COMMUNICATION DTCS .