Diagnostic Instructions
DTC Descriptors
DTC C0460 39: Steering Position Signal
DTC C0460 42: Steering Position Signal Initialization Not Accomplished
DTC C0460 4B: Steering Position Signal Calibration Not Accomplished
DTC C0460 5A: Steering Position Signal Not Plausible
DTC C0460 71: Steering Position Signal Internal Failure
DTC C0460 72: Steering Position Signal Rolling Count Invalid
Circuit/System Description
This vehicle received the steering wheel position signal from the power steering control module (PSCM) over GMLAN.
The steering angle sensor provides a GMLAN signal output to the EBCM that represents the steering wheel degree of rotation. The EBCM utilizes this signal to calculate the driver intended driving direction for vehicle stability enhancement system (VSES).
Conditions for Running the DTC
| • | Ignition voltage is greater than 9.5 volts. |
Conditions for Setting the DTC
| • | Steering angle sensor is reporting an internal electronic failure. |
| • | Steering angle sensor has not been initialized. |
| • | Steering angle sensor offset is greater than 15 degrees. |
Action Taken When the DTC Sets
| • | Vehicle stability enhancement system (VSES) are disabled. |
| • | The VSES indicator turns ON |
| • | The driver indicator turns ON |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present and the DTC is cleared with a scan tool. |
| • | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Reference Information
Schematic Reference
Power Steering Schematics
Connector End View Reference
Power Steering Connector End Views
Description and Operation Reference
Power Steering System Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
This vehicle received the steering wheel position signal from the power steering control module (PSCM) over GMLAN. After repairs are completed or diagnosing C0460 5A steering signal not plausible, perform the steering positions calibration for both power
steering control module, and electronic brake control module. For all electronic power steering and steering wheel position sensor diagnostics see power steering. Refer to
DTC C0460
.
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
