U0121-00-Lost Communication With Antilock Brake System (Abs) Control Module: Notes
For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .
| Possible Causes |
|---|
| OPEN CAN CIRCUIT BETWEEN THE TRANSMISSION CONTROL MODULE (TCM) AND THE ANTILOCK BRAKE SYSTEM (ABS) MODULE |
| SHORT TO GROUND ON THE CAN CIRCUITS BETWEEN THE TCM AND THE ABS |
| SHORT TO BATTERY ON THE CAN CIRCUITS BETWEEN THE TCM AND THE ABS |
| LOOSE CONNECTION AT BODY CONTROL MODULE (BCM) |
| LOOSE CONNECTION AT TCM |
| POWER OR GROUND CIRCUIT FAULTS FOR BCM |
| BCM |
| TCM |