GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Equinox 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 DTC C0460

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 provide overview of each diagnostic category.

DTC Descriptor

DTC C0460 00: Steering Position Sensor

Circuit/System Description

The power steering control module (PSCM) continuously monitors the position sensor sine wave frequency signals. The sine wave voltage signals of the position sensor and the angle difference between the steering column output and input shafts detected by the torque sensor are both processed by the PSCM to detect and calculate the steering wheel angle.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The PSCM detects open, short to ground or short between any of the motor rotational sensor circuits.

Actions Taken When DTC Sets
    • DTC C0460 00 is stored in memory.
    • The driver information center (DIC) displays the SERVICE POWER STEERING message.
    • No steering assist.

Conditions for Clearing the DTC
    • A current DTC will clear on the next malfunction free ignition cycle.
    • A history DTC will clear after 100 consecutive malfunction-free ignition cycles.

Reference Information

Schematic Reference

Power Steering Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Steering System 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 Testing
  1. Ignition OFF, disconnect the X2 harness connector at the PSCM.
  2. Ignition OFF, test for 10-200 Ω of resistance between the signal circuit terminal 1 and the signal circuit terminal 3.
    3. ⇒If not within the specified range, test both signal circuits for an a short to ground or an open/high resistance. If the circuits test normal, replace the steering column.
  3. Ignition OFF, test for 3K-10KΩ of resistance between the signal circuit terminal 6 and the signal circuit terminal 3.
    4. ⇒If not within the specified range, test both signal circuits for an a short to ground or an open/high resistance. If the circuits test normal, replace the steering column.
  4. Ignition OFF, test for 6K-20K Ω of resistance between the signal circuit terminal 5 and the signal circuit terminal 3.
    5. ⇒If not within the specified range, test both signal circuits for an a short to ground or an open/high resistance. If the circuits test normal, replace the steering column.
  5. Ignition OFF, test for greater than 1M Ω of resistance between the signal circuit terminal 3 and the motor flange.
    6. ⇒If less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the steering column.
  6. If all circuits test normal, replace the PSCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Control Module References
    •  Power Steering Assist Motor Replacement
    •  Electronic Power Steering Motor Control Module Replacement