Diagnostic Instructions

DTC Descriptors

DTC C0460 00 : Steering Position Signal

DTC C0460 4B : Steering Position Signal Calibration Not Learned

DTC C0460 42 : Steering Position Signal Calibration Data Set Not Programmed

DTC C0460 5A : Steering Position Signal Plausibility Failure

DTC C0460 71 : Steering Position Signal Invalid Serial Data Recieved

DTC C0460 72 : Steering Position Signal Alive Counter Incorrect

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+	C0460 00	C0460 00	C0460 00	--
Low Reference	C0460 00	C0460 00	--	--
Can Bus HI Serial Data	C0460 71	C0460 71	C0460 71	C0460 42, C0460 5A, C0460 71, C0460 72
Can Bus Low Serial Data	C0460 71	C0460 71	C0460 71	C0460 42, C0460 5A, C0460 71, C0460 72

Circuit/System Description

The steering angle sensor (SAS) measures the rotation and direction of the steering wheel. The electronic brake control module (EBCM) monitors the signals from the SAS, yaw rate sensor, brake pressure sensor, and wheel speed sensors to maintain optimum stability and control when a VSES event occurs.

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

Engine running and steering wheel centered, with a scan tool perform the steering angle sensor calibration procedure, and verify DTC does not reset. If DTC resets, refer to circuit testing.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the steering angle sensor.
2. Ignition OFF for 60 seconds, test for less than 5 ohms between the low reference circuit terminal 6 and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.

3. Ignition ON, test for ignition voltage between the ignition voltage circuit terminal 1 and ground.

⇒	If not within the specified range, test the ignition voltage circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the EBCM.

4. Ignition OFF, disconnect the harness connector at the EBCM.
5. Ignition ON, test for less than 1 volt between the following terminal listed below and ground.

•	CAN Bus High serial data circuit terminal 18

•	CAN Bus Low serial data circuit terminal 19

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

6. Ignition OFF, test for infinite resistance between the following terminal listed below and ground.

•	CAN Bus High serial data circuit terminal 18

•	CAN Bus Low serial data circuit terminal 19

⇒	If not the specified value, test the appropriate serial data circuit for a short to ground.

7. Test for less than 2 ohms between the appropriate serial data circuit terminals listed below.

•	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 range, test the appropriate serial data circuit for an open/high resistance.

8. Test for infinite resistance between the CAN Bus High serial data circuit terminal 18 and the CAN Bus Low serial data circuit terminal 19.

⇒	If not the specified value, repair the serial data circuits for a short together.

9. If all circuits test normal, replace the steering angle sensor. If DTC resets, replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.