C121C–TORQUE REQUEST SIGNAL DENIED
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
With the ignition on.
- Set Condition:
When the Anti-Lock Brake Module indicates if engine management relevant for Automatic Yaw Control/Traction Control System control can be accomplished.
| Possible Causes |
| ANTI-LOCK BRAKE MODULE |
| POWERTRAIN CONTROL MODULE |
Diagnostic Test
1.CHECK FOR A DTC C121C-TORQUE REQUEST SIGNAL DENIEDNOTE: This DTC must be active for the results of this test to be valid and this DTC may set while driving under severe load conditions.
Does the scan tool display: C121C-TORQUE REQUEST SIGNAL DENIED?
Yes
- Go To 2
No
- Refer to the INTERMITTENT CONDITION diagnostic procedure.
- Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
2.ESP TORQUE REQUEST SIGNAL
Was the Allow ESP Torque Request showing NOT set?
Yes
- Replace the Powertrain Module in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
- Replace the Anti-Lock Brake Module in accordance with the Service Information.
- Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).