Diagnostic Test
- 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 Environmental Data to help identify the conditions in which the DTC was set.
- 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
- Perform the ABS-INTERMITTENT CONDITION diagnostic procedure. Refer to ABS-INTERMITTENT CONDITION .
- CHECK THE POWERTRAIN DTCS
- With the scan tool, read and record Powertrain DTCs.
Were any Powertrain related DTCs found?
Yes
- Repair the Powertrain diagnostics. Refer to 2.0L & 2.4L - DIAGNOSTIC CODE INDEX .
No
- Go To 3
- With the scan tool, read and record Powertrain DTCs.
- 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 in accordance with the Service Information.
- Perform POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Replace the Anti-Lock Brake Module in accordance with the Service Information.
- Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .