Diagnostic Aids

The scan tool reads steering wheel position in volts. With the ignition switch in the ON position and as the steering wheel is rotated, the voltage should be between 0.2 - 4.9 volts. Voltage should increase at a steady rate up to 4.9 volts when the wheel is turned in either direction, one quarter revolution (90°).
^ above 0.2 volts.
^ below 4.9 volts when the steering wheel is rotated one quarter revolution (90°).

Using the scan tool, monitor the HWSS.
^ Turn the ignition ON.
^ Turn the steering wheel.

The scan tool display should show voltages from 0.2 - 4.9 volts as the steering wheel is turned one quarter revolution (90°). If the steering wheel voltage is not within specifications, verify that the Steering Handwheel Speed Sensor is not binding, grinding or damaged.