For 1990-2009 cars

### 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 Data
DTC 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

Component Connector End Views

#### Description and Operation

ABS Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### 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

1. Ignition ON, verify that DTC C0710 42 is not present.

⇒ | If DTC C0710 42 is present, perform the Steering Angle Sensor Centering.

2. Ignition OFF, disconnect the harness connector at the B99 Steering Angle Sensor.
3. Test for less than 5 Ω between the ground circuit terminal 6 and ground.

⇒ | If greater than the specified value, test the ground circuit for an open/high resistance.

4. Ignition ON, test for greater than 11 V between the 12 V reference circuit terminal 5 and ground.

⇒ | 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).

5. If all circuits test normal, replace the B99 Steering Angle Sensor and verify the DTC does not reset.

⇒ | If the DTC resets, replace the K17 Electronic Brake Control Module (EBCM).

### Repair Instructions

• | Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Steering Wheel Position Sensor Replacement

• | Control Module References for EBCM replacement, setup and programming