Diagnostic Test
- CHECK ECM FOR CAN BUS DTCS
- With the scan tool, check for any ECM CAN BUS DTCs.
Are there any ECM CAN BUS DTCs set?
Yes
- Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing and perform the appropriate diagnostic procedure.
No
- Go to step 2
- With the scan tool, check for any ECM CAN BUS DTCs.
- CHECK THE TRANSMISSION CONTROL MODULE
Repair
- 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 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 .