Circuit/System Description

WARNING: This page is about a different car, the 2016 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.

The ultrasonic parking assist system is designed to identify and notify the driver of an object in the vehicle's path when moving in reverse at speeds of less than 8 km/h (5 MPH). The distance and location of the object is determined by 4 object sensors, located in the rear bumper.

The parking assist system is enabled and disabled through the parking assist switch. When enabled, the parking assist indicator will illuminate. The parking assist switch and indicator are connected to the rear parking assist control module. The rear parking assist control module supplies a signal voltage to the parking assist switch. When the switch is pressed, the signal circuit is grounded. The 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 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 rear parking assist control module will send serial data to the radio and memory seat module to provide either an audible alert or haptic feedback through the active safety seat (if equipped). The driver can select between audible or haptic alerts in the vehicle personalization menu.