C1231
DTC C1231
Circuit Description
The electronic brake control module (EBCM) monitors the steering wheel position sensor signal for vehicle stability control (VSC) system operation.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C1231 Steering Position Sensor Circuit Malfunction
Conditions for Running the DTC
DTC C1231 can be set anytime the ignition is in the ON position.
Conditions for Setting the DTC
The EBCM does not receive data from the steering wheel position sensor.
Action Taken When the DTC Sets
* The traction control and VSC is disabled.
* The VSC warning indicator turns ON.
Conditions for Clearing the DTC
The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
Diagnostic Aids
Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction.
The following are possible causes of the malfunction:
* An open, high resistance, or short to ground in the steering wheel position sensor ignition positive voltage circuits
* An internal steering wheel position sensor malfunction
If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections. Component Tests and General Diagnostics
Test Description
The number below refers to the step number on the diagnostic table.
3. This step tests for correct voltage of steering wheel position sensor ignition positive voltage circuits.
