41TE NGC

P0613-INTERNAL TRANSMISSION PROCESSOR



Theory of Operation

The internal watchdog is a separate hardware circuit which continuously monitors the microprocessor. To make sure the controller is operating properly, the watchdog must receive a signal from the microprocessor within a specific time window. After 10 seconds of vehicle operation and noted controller fault identification the transmission will be placed in limp-in and the MIL will illuminate.

- When Monitored:
After the ignition is turned to the run position and every 60 seconds thereafter.

- Set Condition:
Either of the following conditions occur 3 times in less than 590 milliseconds: The watchdog line remains high after the watchdog test or the transmission relay coil is energized and remains on after the watchdog delay expires.





Always perform the 40/41TE Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.
PCM - INTERNAL ERROR

Repair

- Using the schematics as a guide, check the Powertrain Control Module (PCM) 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 PCM. With the scan tool, perform Quick Learn Quick Learn Procedure.
- Perform the 40/41TE TRANSMISSION VERIFICATION TEST. 40/41TE Transmission Verification Test.