Circuit/System Description
WARNING: This page is about a different car, the 2010 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The object alarm sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The rear object sensor control module supplies 8 volts to the object alarm sensors via the 8 volt reference circuit and provides ground via the low reference circuit. The rear object sensor control module triggers the sensors in a sequential loop. After each sensor transmits, the rear object sensor control module uses the sensor ring received through the signal circuit to calculate the distance and position of an object.