Circuit/System Description

The ultrasonic parking assist system is designed to identify and notify the driver of an object in the vehicle's path when moving reverse at speeds of less than 8 km/h (5 MPH). The distance and location of the object is determined by four object sensors, located in the rear bumper. The parking assist system will notify the driver using an audible signal through the radio.

The parking assist system is enabled and disabled through the parking assist switch. When enabled, the parking assist indicator will illuminate.

The switch and indicator are connected to the front and rear parking assist control module. The front and rear parking assist control module supplies a reference voltage to the parking assist switch. When the switch is pressed, the signal circuit is grounded. The front and rear parking assist control module can control the park assist indicator by grounding the control circuit to illuminate the LED which indicates that the system is enabled.

The front and rear parking assist control module supplies a reference voltage and a low reference to the object sensors. The sensors will return a signal based on the reflections from objects within range of the sensors.

When an object is detected, the front and rear parking assist control module will send serial data to the radio to provide an audible alert.