C121C

C121C-TORQUE REQUEST SIGNAL DENIED

For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
With the engine running.

- Set Condition:
When the Powertrain Control Module indicates, for an extended period of time, that engine management relevant for Automatic Yaw Control/Traction Control System control can not be accomplished.





Diagnostic Test

1. CHECK FOR A DTC C121C-TORQUE REQUEST SIGNAL DENIED
NOTE: 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.

Turn the ignition on.
With the scan tool, read and record DTCs.
With the scan tool, read and record Freeze Frame information.
With the scan tool, erase DTCs.
Cycle the ignition switch from off to on.
Start Engine.
With the scan tool, read and record DTCs and monitor ESP Torque Request status.
Does the scan tool display: C121C-TORQUE REQUEST SIGNAL DENIED?

Yes

- Go to 2

No

- Refer to the ABS-INTERMITTENT CONDITION TEST. ABS Intermittent Condition Test

2. CHECK THE POWERTRAIN DTCS
With the scan tool, read and record Powertrain DTCs.
Were any Powertrain related DTCs found?

Yes

- Repair the Powertrain System.

No

- Go to 3

3. ESP TORQUE REQUEST SIGNAL
Engine started.
With the scan tool, read the Allow ESP Torque Request status bit.
Was the Allow ESP Torque Request showing NOT set?

Yes

- Replace the Powertrain Module.


No

- Replace the Anti-Lock Brake Module.
- Perform ABS VERIFICATION TEST. ABS Verification Test