C121C-00

C121C-00-TORQUE REQUEST SIGNAL DENIED

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on, engine running.

- Set Condition:
When the Powertrain Control Module (PCM) has informed the Anti-lock Brake System (ABS) Module that it can no longer allow the engine torque reduction requests.





NOTE: If any PCM DTCs are present, perform the appropriate diagnostic procedure. Testing and Inspection .

1. VERIFY THE DTC IS ACTIVE

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.

1. Turn the ignition on.
2. With the scan tool, read and record DTCs.
3. With the scan tool, read and record Freeze Frame information.
4. With the scan tool, erase DTCs.
5. Cycle the ignition switch from off to on.
6. Start the engine and raise the engine RPM to 2500.
7. With the scan tool, read and record DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

- Perform the ABS-INTERMITTENT CONDITION TEST. Testing and Inspection.

2. CHECK ENGINE IDLE
1. Allow the engine to idle.

Does the engine run rough at idle?

Yes

- Replace the Powertrain Control Module (PCM). Powertrain Control Module - Removal
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.

No

- Replace the Anti-Lock Brake System (ABS) Module. Anti-Lock Brake System Module - Removal.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.