Possible Causes
| Possible Causes |
|---|
| (T78) BANK 1 SOLENOID POWER SUPPLY CIRCUIT OPEN |
| (T818) SHIFT SOLENOID D (4) CONTROL CIRCUIT OPEN |
| SHIFT SOLENOID D (4) |
| TRANSMISSION CONTROL MODULE (TCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to 6F24 PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .