C121C

C121C-TORQUE REQUEST SIGNAL DENIED






- 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.






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.

Does the scan tool display: C121C-TORQUE REQUEST SIGNAL DENIED?

Yes

- Go To 2

No

- Refer to the ABS-INTERMITTENT CONDITION TEST. Component Tests and General Diagnostics

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.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

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