Diagnostic Test
WARNING: This page is about a different car, the 2012 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.
- 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 DTC's.
- With the scan tool, read and record Freeze Frame information.
- With the scan tool, erase DTC's.
- Cycle the ignition switch from off to on.
- Start Engine.
- With the scan tool, read and record DTC's.
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 DTC's
- With the scan tool, read and record Powertrain DTC's.
Were any Powertrain ESP related DTC's found?
Yes
- Replace the Powertrain Module in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to 1500 & 2500 - 3.7L, 4.7L & 5.7L - POWERTRAIN VERIFICATION TEST or 2500 & 3500 - POWERTRAIN VERIFICATION TEST - 6.7L .
No
- Replace the Antilock Brake Module in accordance with the Service Information.
- Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
- With the scan tool, read and record Powertrain DTC's.