Diagnostic Instructions

DTC Descriptors

DTC C0460 00: 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

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Steering Wheel Position Sensor 12-Volt Reference	C0460 00	C0460 00	C0460 00	--
Low Reference	C0460 00	C0460 00	C0460 00	--
Steering Wheel Position Signal Can HI	C0460 00	C0460 00	C0460 00	C0460 42, C0460 4B, C0460 5A, C0460 71, C0460 72
Steering Wheel Position Signal Can Lo	C0460 00	C0460 00	C0460 00	C0460 42, C0460 4B, C0460 5A, C0460 71, C0460 72

Circuit/System Description

The electronic brake control module (EBCM) provides the steering angle sensor a 12-volt ignition supply voltage.

The steering angle sensor provides a serial data signal to the EBCM that represents the steering wheel degree of rotation. The EBCM utilizes this signal to calculate the driver intended driving direction.

Conditions for Running the DTC

Conditions for Setting the DTC

Action Taken When the DTC Sets

Conditions for Clearing the DTC

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

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Verify that DTC C0460 is not set in the PSCM. If DTC is set refer to DTC C0460.
2. With the scan tool perform the steering position sensor calibration.
3. Clear DTC and operate the vehicle within the conditions for running the DTC. Verify the DTC does not reset.

⇒	If the DTC resets, refer to circuit testing.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Ignition ON, test for less than 1 volt between the following circuit terminals listed below and ground.

•	Reference voltage circuit terminal 5

•	Low Reference circuit terminal 40

•	CAN Bus High Serial Data circuit terminal 18

•	CAN Bus Low Serial Data circuit terminal 19

⇒	If greater than the specified range, test the appropriate circuit for a short to voltage.

3. Ignition OFF, test for infinite resistance between the following circuit terminals listed below and ground.

•	Reference voltage circuit terminal 5

•	Low Reference circuit terminal 40

•	CAN Bus High Serial Data circuit terminal 18

•	CAN Bus Low Serial Data circuit terminal 19

⇒	If less than the specified value, test the appropriate circuit for a short to ground.

4. Ignition OFF, disconnect the harness connector at the Steering Angle Sensor.
5. Test for less than 2 ohms between the following circuit terminals listed below.

•	Reference voltage circuit terminal 5 at the EBCM harness connector and terminal 1 at the steering angle sensor harness connector.

•	Low Reference circuit terminal 40 at the EBCM harness connector and terminal 6 at the steering angle sensor harness connector

•	CAN Bus High Serial Data circuit terminal 18 at the EBCM harness connector and terminal 3 at the steering angle sensor harness connector.

•	CAN Bus Low Serial Data circuit terminal 19 at the EBCM harness connector and terminal 4 at the steering angle sensor harness connector.

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

6. If all circuits test normal, replace the Steering Angle Sensor. If the DTC resets replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.