Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. With the scan tool, read Transmission Control Module (TCM) DTCs and record on the repair order.
2. Record the Event Data and Environmental Data.
3. With the scan tool, erase DTCs.
4. Using the recorded Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. With the scan tool, read TCM DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Go To 3
CHECK MANUAL PARK RELEASE (MPR) LEVER
1. Check MPR Lever and, if equipped, Cable for activation, obstruction, or damage that could cause this condition.
  NOTE:
  Only early build vehicles will be equipped with an MPR cable, late builds use a special tool that threads in to the transmission to operate the MPR.
  
  Is the MPR Lever or, if equipped, Cable causing this condition?
  
  Yes
  - Repair MPR Lever or Cable as necessary.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Using the schematics as a guide, check the Transmission Control Module (TCM) connector and all related in-line connector terminals for corrosion, damage, or pushed out terminals. Pay particular attention to power and ground circuits. Check Service Bulletins for possible causes that may apply. Remove the Transmission oil pan and the TCM. Refer to MODULE, TRANSMISSION CONTROL (TCM), REMOVAL AND INSTALLATION . Inspect and clean the solenoid terminals at the wiring harness leadframe for metallic contamination. Reinstall the TCM. Refer to MODULE, TRANSMISSION CONTROL (TCM), REMOVAL AND INSTALLATION . Connect the scan tool and erase the Diagnostic Trouble Code (DTC)s. Road test the vehicle and check for DTCs. If the DTC returns, replace and program the Transmission Control Module (TCM) in accordance with the Service Information. Refer to MODULE, TRANSMISSION CONTROL (TCM), REMOVAL AND INSTALLATION .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
CHECK WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle the wires while checking for shorted and open circuits.
4. Check for any Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  - Test Complete.