Parking Assist Description And Operation: Notes
With ignition power and ground supplied, transmission in R, and the parking assist switch ON, the park assist system will detect obstacles within 1.8 m (5.9 ft.) of the rear object alarm sensors. The vehicle operator is notified of obstacles by varied rate of tone from the parking assist buzzer depending on distance of obstacle being sensed.
The parking assist system is made up of the following components:
- Parking assist control module
- Rear object alarm sensors
- Parking assist switch
- Parking assist switch indicator
- Parking assist speaker
Parking Assist Control Module
The parking assist control module provides a reference voltage and a low reference to the 4 object alarm sensors. The parking assist control module receives individual signals from each of the 8 sensors and determines the location and distance of an object based on these inputs. When an object is detected, the parking assist control module will power the buzzer creating an audible alert.
Object Alarm Sensors
The object alarm sensors are located in the rear bumper of the vehicle. The sensors are used to determine the distance between an object and the bumper. Each sensor emits an ultrasonic frequency which is reflected off any object located behind the vehicle. These reflections are received by the sensors. The time difference between the emission of the frequency and when the reflection is received is known as sensor echo time, it is used to determine the distance to the object. The sensors report this information to the parking assist control module.
Parking Assist Switch
The parking assist can be activated and deactivated by pressing the parking assist switch. By engaging the reverse gear the parking assist can also be activated. By subsequently pressing the parking assist switch the parking assist can be disabled again.
Parking Assist Switch Indicator
The indicator is illuminated when system is OFF
The indicator in the parking assist switch shows the status of the parking assist. If the lamp is ON, the parking assist is deactivated.
Parking Assist Speaker
When a failure in the system is present, the speaker will not emit sounds when the transmission is in reverse.
The parking assist speaker emits sounds for the status of the parking assist, and for distance related notifications to the driver. This is an actual speaker that emits different tones for distance, as well as when retrieving flash codes.