C0472

Circuit Description
The steering wheel position/speed sensor is a O to 5 volt device which is used to measure steering wheel position. The valid output voltage range from the sensor is 0.35 to 4.75 volts. The output voltage will increase or decrease within the valid voltage range as the steering wheel is rotated.
Vehicles that are not equipped with the Z55 option, Real Time Damping (RTD) have only 1 signal used by the Body Control Module (BCM). The sensor is mounted at the base of the steering column.


Conditions for Running the DTC
Vehicle speed is greater than 80.4 km/h (50 mph) for at least 10 seconds.


Conditions for Setting the DTC
The body control module detects a steering handwheel position/speed sensor out-of-range condition when the vehicle speed is greater than 80.4 km/h (50 mph) for at least 10 seconds.


Action Taken When the DTC Sets
The Electronic Variable Orifice (EVO) outputs will be disabled for the remainder of the ignition cycle.


Conditions for Clearing the DTC
- The body control module no longer detects a steering wheel speed/position sensor out-of-range condition.
- A history DTC will clear after not seeing the malfunction for 100 consecutive ignition cycles.
- Using the scan tool.


Diagnostic Aids
The following conditions may cause the malfunction to occur:
- There is a short to ground or voltage in the signal circuit.
- There is an open in the signal circuit.
- Perform a visual inspection for loose or poor connections at all related components.
- Refer to Testing for Intermittent and Poor Connections in Diagrams/Diagnostic Aids.


Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
2. Verifies sensor voltage range.
3. Tests for the proper operation of the circuit in the high voltage range.
4. Tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.
5. Tests for a short to ground and an open in the 5 volt reference circuit.
7. Tests for a short to voltage, a high resistance, or an open circuit.
14. The control module must be recalibrated when replacement is necessary.