Transmission Control Module (TCM) - AS68RC

P0613-INTERNAL TRANSMISSION PROCESSOR

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Transmission Control Module (TCM) performs several internal checks on the processor. The controller checks the Check Sum of the ROM, the Read/Write integrity of the RAM, and the Check Sum of the EEPROM.

- When Monitored:
Continuously with the Ignition on and the engine running.

- Set Condition:
Transmission Control Module (TCM) detects an error in the RAM, ROM, or EEPROM.





Always perform the AS68RC Pre-Diagnostic Troubleshooting procedure before proceeding. . RLE And RFE Transmissions

TCM INTERNAL ERROR

Repair

- Using the schematics as a guide, check the Transmisssion Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for Service Information Tune-ups or Service Bulletins for any possible causes that may apply. If no problems are found, replace and program the TCM. With the scan tool, perform Quick Learn.
- Perform AS68RC TRANSMISSION VERIFICATION TEST AS68RC Transmission Verification Test.