Diagnostic Test

1. Record Environmental Data and then clear DTCs.
2. Road test the vehicle.
3. Maintain a minimum steady speed of 80 km/h (50 mph).
4. Using the AutoStick® feature, manually shift the transmission from fifth to sixth gear three times.

   Did the DTC reset?

   Yes 

   • Inspect valve body for possible hydraulic problem.
   • Disassemble transmission, inspect mechanical components and repair as necessary.
   • If no trouble is found, use the schematics as a guide, check the Transmission Control Module (TCM) terminals and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for any Service Information Tune-ups or Service Bulletins for possible causes that may apply. If no problems are found, replace and program the Transmission Control Module Assembly (TCMA) in accordance with the Service Information.
   • Perform the MPS6 VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .

   No 

   • Go to step  2

Repair 

• Check the transmission internal gearing for proper tolerances and operation concerning all shift forks and there respective components. If no problems are found, using the schematics as a guide, check the Transmission Control Module (TCM) terminals and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check the Service Information Bulletins for any possible causes that may apply. If no problems are found, replace and program the Transmission Control Module Assembly (TCMA) in accordance with the Service Information.
• Perform the MPS6 VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .