Possible Causes
| Possible Causes |
|---|
| OPEN TAP SWITCH SIGNAL CIRCUIT |
| SHORTED TAP SWITCH SIGNAL CIRCUIT |
| OPEN TAP SHIFT GROUND CIRCUIT |
| UPSHIFT (+) SWITCH |
| TRANSMISSION CONTROL MODULE (TCM) |
Always perform the DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .