Possible Causes
| POSSIBLE CAUSES |
|---|
| CAN BUS OPEN OR SHORTED CONDITION |
| TRANSMISSION HARDWARE OR SOFTWARE ISSUE |
| TRANSMISSION CONTROL MODULE (TCM) |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .