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
1. Go to 2).
No
1. Refer to ABS INTERMITTENT CONDITION .
2. Perform ABS VERIFICATION TEST .
2) 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
1. Replace the Powertrain Module in accordance with the Service Information.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Replace the Anti-Lock Brake Module in accordance with the Service Information.
2. Perform ABS VERIFICATION TEST .