C121C

C121C-TORQUE REQUEST SIGNAL DENIED

For a complete wiring diagram Refer to Diagrams/Electrical. Diagrams By Number


- 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.







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.

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

Yes

- Go To 2

No

- Perform the ABS Intermittent Condition diagnostic procedure. Testing and Inspection
- Perform ABS VERIFICATION TEST. ABS Verification Test


2. CHECK THE POWERTRAIN DTCs


With the scan tool, read and record Powertrain DTCs.

Were any Powertrain ESP related DTCs found?

Yes

- Replace the Powertrain Module.
- Perform the POWERTRAIN VERIFICATION TEST. Verification Tests

No

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