Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC C0460 71: Steering Position Sensor Invalid DataDTC C0710 00: Steering Position Signal Malfunction
DTC C0710 42: Steering Position Signal Calibration Not Programmed
DTC C0710 5A: Steering Position Signal Not Plausible
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
12 V Reference | C0460 71, U0125, U0126 | C0460 71, U0125, U0126 | -- | -- |
CAN Bus High Serial Data | U0073, U0074, U0100, U0101, U0104, U0125, U0126, U0128, U0136, U0139, U0140 | U0073, U0074, U0100, U0101, U0104, U0125, U0126, U0128, U0136, U0139, U0140 | U0073, U0074, U0100, U0101, U0104, U0125, U0126, U0128, U0136, U0139, U0140 | C0460 71, C0710 5A |
CAN Bus Low Serial Data | U0073, U0074, U0100, U0101, U0104, U0125, U0126, U0128, U0136, U0139, U0140 | U0073, U0074, U0100, U0101, U0104, U0125, U0126, U0128, U0136, U0139, U0140 | U0073, U0074, U0100, U0101, U0104, U0125, U0126, U0128, U0136, U0139, U0140 | C0460 71, C0710 5A |
Ground | -- | C0460 71, U0126 | -- | -- |
Circuit/System Description
The steering angle sensor receives a 12 V reference voltage from the electronic brake control module (EBCM). The EBCM receives high speed controller area network (CAN) message inputs from the steering angle sensor identifying the position and direction of the steering wheel rotation. The EBCM utilizes this signal to calculate the driver intended driving direction.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
C0460 71
The control module received an invalid steering angle sensor signal.
C0710 00
The steering angle sensor signal is invalid.
C0710 42
The steering angle sensor is not calibrated.
C0710 5A
| • | No steering angle sensor signal |
| • | The steering angle sensor signal is not plausible with the yaw rate sensor signal. |
| • | The steering angle sensor offset is out of specified range. |
Action Taken When the DTC Sets
| • | The EBCM disables the stability control and hill start assist for the duration of the ignition cycle. |
| • | The traction control/stability control-active indicator turns ON. |
Conditions for Clearing the DTC
| • | A current DTC clears when the diagnostic runs and passes. |
| • | The EBCM will turn OFF the indicator in the next ignition cycle. |
Diagnostic Aids
The car should not pull in either direction causing the steering wheel to be OFF center while driving in a straight line on a level surface.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Steering Column Position parameter. As the steering wheel is turned, the reading should travel between -550° and 550°.
Circuit/System Testing
- Ignition ON, verify that DTC C0710 42 is not present.
- Ignition OFF, disconnect the harness connector at the B99 Steering Angle Sensor.
- Test for less than 5 Ω between the ground circuit terminal 6 and ground.
- Ignition ON, test for greater than 11 V between the 12 V reference circuit terminal 5 and ground.
- If all circuits test normal, replace the B99 Steering Angle Sensor and verify the DTC does not reset.
| ⇒ | If DTC C0710 42 is present, perform the Steering Angle Sensor Centering. |
| ⇒ | If greater than the specified value, test the ground circuit for an open/high resistance. |
| ⇒ | If less than the specified range, test the 12 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K17 Electronic Brake Control Module (EBCM). |
| ⇒ | If the DTC resets, replace the K17 Electronic Brake Control Module (EBCM). |
Repair Instructions
| • | Perform the Diagnostic Repair Verification after completing the diagnostic procedure. |
| • | Control Module References for EBCM replacement, setup and programming |
