Circuit/System Description

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

The object alarm system monitors how close a vehicle is to an object when backing up in a parking maneuver at speeds less than 8 km/h (5 mph). The distance between a vehicle and an object of interest is monitored by the 4 ultrasonic sensors located in the rear bumpers of the vehicle. The object alarm sensors receive the echo signal reflected off the object while the vehicle is backing up. The object alarm system uses visual displays and audible warnings from the radio speakers to warn the driver of an object of interest within the defined field of view. The visual display comprises of two amber and one red indicators, which illuminate based on the vehicle distance to the object. The object alarm sensor is a three-wire sensor that consists of supply voltage circuit, signal circuit and low reference circuit. Power and ground is provided to the object alarm sensor via the supply voltage circuit and low reference from the object detection alarm module. The typical object alarm sensor signal voltage when the system is active is between 7.2 V-9.2 V.