Code 83 - TCC Solenoid Circuit: Notes

Fig 1: Code 83 Circuit Diagram

Courtesy of GENERAL MOTORS CORP.

The PCM/TCM quad driver has a fault detect circuit, which is monitored by PCM/TCM. PCM/TCM compares voltage values of fault detect circuit with acceptable values in PCM/TCM memory. If PCM/TCM senses voltage is not within acceptable range, Code 83 will be set.

1. This step checks TCC solenoid and circuits inside transmission for shorts.
2. Battery voltage should be present at TCC solenoid.
3. This step checks circuit 422 for shorts to ground.
4. This step checks if PCM/TCM can control TCC solenoid.