P0613

P0613-INTERNAL TRANSMISSION PROCESSOR



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. Testing and Inspection.
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.