Diagnostic Test

CHECK WIRING AND CONNECTORS
1. Ignition on, engine not running.
2. With the scan tool, monitor the Transmission Temperature.
3. Apply the parking brake.
4. With the brakes firmly applied, place the gear selector in Drive.
5. While monitoring the scan tool, wiggle the wires and connectors from the TCM to the Electrohydraulic Control Unit.
  Did the transmission temperature fluctuate while wiggling the wires?
  
  Yes
  - Repair the wiring and/or connectors as necessary.
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
  No
  - Go To 2.
CHECK IF DTC RESETS
1. Replace the Transmission Temperature Sensor in accordance with the Service Information.
2. Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
3. With the scan tool, read Transmission DTCs.
  Did DTC P0714 reset?
  
  Yes
  - Using the schematics as a guide, check the Transmission Control Module (TCM) connectors and terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM in accordance with the Service Information.
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
  No
  - Test Complete.