Jeep Grand Cherokee WK. Manual — part 287
•
Ensure that the parking brake is not applied.
If “Service Park Assist System” appears in the EVIC after making sure the rear bumper is clean, proceed to diag-
nose the system using a scan tool and the appropriate diagnostic information.
To diagnose the Park Assist Module, use a scan tool and the appropriate body diagnostic information.
REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Lift up rear seat to expose the park assist module
and final drive control module.
3. Disconnect the module electrical connector (1).
4. Using a trim stick (special tool #C-4755) or equiv-
alent, gently pry back on the retaining tabs on the
mounting plate (2) and remove module.
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INSTALLATION
1. Place the park assist module (3) in its location on
the mounting plate (2) and firmly snap into place.
2. Connect the electrical connector (1).
3. Lower the rear seat back down into position.
4. Connect the battery negative cable.
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PARK ASSIST SENSOR
DESCRIPTION
The Park Assist Sensors generate ultrasonic pulses
when triggered by the park assist module when an
obstacle is detected. The sensors then signal the
module when reflected ultrasonic pulses are received.
The Park Assist Sensors are located in the rear
bumper fascia mounted equally apart. The sensors
detect objects with an ultrasonic pulse that reflects off
the object and then is sent to the module to determine
the distance of the object.
OPERATION
The Park Assist Sensors:
•
Generate ultrasonic pulses when triggered by the Park Assist Module.
•
Reception/filtering of ultrasonic energy received.
•
Signalling the module of received ultrasonic pulses that meet threshold criteria.
The sensors are supplied power by the module. The sensor supply is enabled when the sensor function is neces-
sary.
The sensors detection length from the rear of the vehicle is 0.3 meters to 1.5 meters. This area extends around the
rear side of the vehicle. The sensor detection height from the ground is 0.2 meters to about 1.5 meters.
•
Ensure that the rear bumper (sensors) is free of dirt and debris to keep the system operating properly.
•
Jackhammers, large trucks, and other vibrations could affect the performance of the system.
•
Ensure that the parking brake is not applied.
If “Service Park Assist System” appears in the EVIC after making sure the rear bumper is clean, proceed to diag-
nose the system using a scan tool and the appropriate diagnostic information.
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REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Remove rear fascia (Refer to 13 - FRAME & BUMPERS/BUMPERS/REAR FASCIA - REMOVAL).
3. Unsnap Park Assist Sensor (1) from the retaining
housing (2) and remove from fascia.
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