Principles of Operation (How Does It Work?)
PRINCIPLES OF OPERATIONNOTE: The liftgate must be closed for correct operation of the parking aid system.
The parking aid system detects objects behind the vehicle when the vehicle is in reverse gear. The parking aid module (PAM) does this by calculating the distance to an object by the use of two ultrasonic sensors and one radar sensor mounted in the rear bumper. The ultrasonic field is emitted in a semicircular area around the rear of the vehicle. The parking aid sensors can detect objects approximately 5 m (16.4 ft) when the vehicle is moving and 3 m (9.8 ft) when the vehicle is stationary to the rear of the vehicle, 50 cm (1.6 ft) to the rear side of the vehicle, and 16 cm (6 in) above ground. A 750 Hz variable warning tone is generated from a parking aid speaker attached to the PAM. The parking aid speaker increases its warning tone rate as the vehicle gets closer to an obstacle. When an object is detected within 45 cm (18 inches) of the sensors, the warning tone becomes continuous.
The parking aid system is enabled when the vehicle ignition is in RUN and reverse (R) gear is selected. The system can be disabled by pressing the menu button on the message center. The parking aid system will indicate it is disabled by illuminating the park assist off located in the message center. The system will always enable when the ignition is transitioned to RUN, or upon entry into REVERSE (R) gear is selected.
The parking aid system will be disabled if a fault is detected in one of the three sensors, the parking aid speaker or the PAM. This will be indicated by the parking assist off in the message center. The PAM is on the International Standards Organization (ISO) 9141 network and can be diagnosed with a diagnostic tool.