Active Park Assist Sensors

The active park assist sensors are narrow beam ultrasonic sensors. The sensors continuously send out ultrasonic signals to detect an available parking space and communicate the information back to the PAM. The sensors are active when the vehicle is moving regardless of whether the operator has pressed the active park assist switch. Only objects that reflect a sufficient amount of sound waves are detected by the active park assist sensors. The surface properties, size and composition of an object can affect the ability of the sensors to detect the object. Incorrect sensor alignment, dirt covered sensors, heavy rain and snow can cause objects not to be recognized. Since ambient temperature affects the speed of sound, the PAM temperature compensates the sensor inputs.

The PAM supplies a 12v reference voltage and a ground. The signal circuit is a LIN used to communicate the sensor data with the PAM.