DTC C0460 or C0461. Pontiac Montana SV6 Ext. 2007

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 2007 🢒 Montana SV6 Ext. 🢒 Brakes 🢒 Park Brake 🢒 DTC C0460 or C0461

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: Steering Position Sensor

DTC C0461: Steering Position Sensor Performance

The steering wheel position sensor supplies 2 analog inputs, Phase A and Phase B, to the electronic brake control module (EBCM). The 2 input signals are approximately 90 degrees out of phase. By interpreting the relationship between the 2 inputs, the EBCM can determine the position of the steering wheel and the direction of the steering wheel rotation.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

C0460

•	Both Phase A and Phase B are greater than 4.9 volts or less than 0.2 volt for 1.6 seconds.

•	The angle change in Phase A or Phase B is greater than 36 degrees between 2 consecutive signal samples.

C0461

The difference in the phase angle between Phase A and Phase B is greater than 16 degrees continuously for 0.25 second.

Action Taken When the DTC Sets

•	The EBCM disables vehicle stability enhancement system (VSES) for the duration of the ignition cycle.

•	A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

•	A current DTC will clear when the malfunction is no longer present.

•	A history DTC will clear after 100 consecutive malfunction-free ignition cycles or when the scan tool Clear DTCs function is used.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Scan Tool Data List for scan tool information

Circuit/System Testing

Ignition OFF, disconnect the harness connector at the steering wheel speed position sensor.
Test for less than 10 ohms between the low reference circuit terminal 2 and ground.

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

Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 1 and ground.

⇒	If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance.

⇒	If greater than the specified range, test the 5-volt reference circuit for a short to voltage.

Verify the scan tool SWPS signal A parameter is less than 0.2 volts.

⇒	If greater than the specified range, test the signal A circuit terminal 5 for a short to voltage.

Verify the scan tool SWPS signal B parameter is less than 0.2 volts.

⇒	If greater than the specified range, test the signal B circuit terminal 5 for a short to voltage.

Install a 3A fused jumper wire between the signal A circuit terminal 5 and the 5-volt reference circuit terminal 1. Verify the scan tool SWPS signal parameter is greater than 4.8 volts.

⇒	If less than the specified range, test the signal A circuit for a short to ground or an open/high resistance.

Install a 3A fused jumper wire between the signal B circuit terminal 6 and the 5-volt reference circuit terminal 1. Verify the scan tool SWPS signal parameter is greater than 4.8 volts.

⇒	If less than the specified range, test the signal B circuit for a short to ground or an open/high resistance.

If all circuits test normal, replace the steering wheel speed position sensor. If the DTC resets, replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement

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