Handwheel Sensor

The PCM applies a 5-volt signal to the handwheel sensor and measures the return voltage on a monitored signal circuit. The handwheel sensor is used by the PCM to determine the rate at which the steering wheel is being turned. The PCM calculates the rate of change in the sensor signal to determine necessary changes to the PCM-controlled Electronic Variable Orifice (EVO) actuator solenoid. Changing the duty cycle of the actuator controls the amount of power assist applied to the steering gear.