Possible Causes
| Possible Causes |
|---|
| (T77) SHIFT PRESSURE CONTROL CIRCUIT OPEN |
| (T77) SHIFT PRESSURE CONTROL CIRCUIT SHORTED TO GROUND |
| (T77) SHIFT PRESSURE CONTROL CIRCUIT SHORTED TO ANOTHER CIRCUIT |
| SHIFT PRESSURE SOLENOID |
| TRANSMISSION CONTROL MODULE (TCM) |
Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to STANDARD PROCEDURE .