Audible Parking Aid System Operation
The rear parking aid system calculates the distance to an object around the rear of the vehicle using 4 ultrasonic sensors. The rear parking aid sensors detect objects approximately 180 cm (70 in) from the rear of the vehicle, 50 cm (20 in) from the rear side of the vehicle, and 30 cm (12 in) above the ground. To detect objects behind the vehicle, the PAM supplies voltage and ground to the rear ultrasonic sensors while monitoring a signal return circuit from each sensor. The 4 rear sensors share common voltage and ground circuits.
The front parking aid system calculates the distance to an object around the front of the vehicle using 4 ultrasonic sensors. The front parking aid sensors detect objects approximately 70 cm (27 in) from the front of the vehicle, 50 cm (20 in) from the front side of the vehicle, 30 cm (12 in) above the ground. To detect objects in front of the vehicle, the PAM supplies voltage and ground to the front ultrasonic sensors while monitoring a signal return circuit from each sensor. The 4 front sensors share common voltage and ground circuits. Vehicles equipped with active park assist must be equipped with front parking aid.
The rear parking aid is not active when the vehicle is in drive.
Only objects that reflect a sufficient amount of sound waves are detected by the parking aid sensors. The surface properties, size and composition of an object can affect the ability of the parking aid system to detect the object.
Parking aid operation may also be affected by:
- Improper sensor installation or alignment
- Dirt or ice covered sensors
- Heavy rain or snow
The parking aid system detects objects under the following conditions:
- The vehicle is in REVERSE (rear parking aid).
- The vehicle is in motion in any gear except NEUTRAL (front parking aid and side sensing system, if equipped).
- The vehicle is moving toward the object.
- The vehicle is stationary and the object is moving toward the vehicle.
- The vehicle and object are both moving toward one another.
The following may trigger false detections when driving at slow/creeping speeds (could be decelerating, or accelerating) less than 12 km/h (8 mph), but not at standstill:
- Near another vehicle equipped with park aid sensors. The other vehicle could be several meters away (it does not have to be within the detection zone of the host vehicle).
- Near a semi truck or school bus with air brakes (while the bus/truck is applying their brake)
- Near some other interfering signal near the ultrasonic sensor frequency
As the distance to the obstacle decreases, the indicator blocks illuminate and move toward the vehicle icon as displayed on the FCDIM or FDIM. If there is no obstacle detected, the distance indicator blocks show greyed out.