Diagnostic Test

READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN
1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
3. With the scan tool, erase all DTCs.
4. Turn the ignition off for a minimum of 10.0 seconds.
5. Turn the ignition on.
6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
7. With the scan tool, read DTCs.
Did the DTC return?

Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK FOR TRANSMISSION CONTROL MODULE (TCM) DTCS
NOTE:
This DTC could set during towing if the Manual Park Release Cable was not fully pulled and the pawl is in an intermediate position for too long.
1. With the scan tool, read TCM DTCs.
  Does the TCM have a DTC set for the Park/Neutral Switch or TRS Signal circuits?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to 3.6L (GPEC 2A) - DIAGNOSTIC CODE INDEX .
  No
  - Replace the Transmission Control Module in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .