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.
  - Perform NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
  No
  - Go to step 2.
CHECK IF DTC RESETS
1. Replace the Transmission Temperature Sensor - P/N Switch in accordance with the Service Information.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
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) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM in accordance with the Service Information.
  - Perform NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
  No
  - Test Complete.