Chrysler Pacifica. Manual — part 477

INSTALLATION

(1) Position the Park Assist Module and install the

two attaching screws (Fig. 6). Torque screws to 3.5
N·m (30 in. lbs.).

(2) Connect the Park Assist Module electrical con-

nector (Fig. 5).

(3) Install the left quarter trim panel (Refer to 23 -

BODY/INTERIOR/QUARTER

TRIM

PANEL

-

INSTALLATION).

(4) Connect the battery negative cable.

PARK ASSIST SENSOR

DESCRIPTION

The Park Assist Sensors (Fig. 7) generate ultra-

sonic pulses when triggered by the park assist mod-
ule when an obstacle is detected. The sensors then
signal the module when reflected ultrasonic pulses
are received. 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.

The Park Assist Sensors are located in the rear

bumper fascia mounted equally apart (Fig. 8).

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
necessary.

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 detec-
tion 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 prop-
erly.

• 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,

Fig. 6 PARK ASSIST MODULE REMOVE/INSTALL

1 - PARK ASSIST MODULE
2 - MOUNTING SCREWS

Fig. 7 PARK ASSIST SENSOR

Fig. 8 PARK ASSIST SENSOR LOCATION

CS

CHIME/BUZZER

8B - 7

PARK ASSIST MODULE (Continued)

proceed to diagnose the system using a scan tool and
the appropriate diagnostic information.

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Remove rear fascia (Refer to 13 - FRAME &

BUMPERS/BUMPERS/REAR FASCIA - REMOVAL).

(3) Disconnect the sensor electrical connector (Fig.

9).

(4) Using a trim stick (special tool #C-4755) or

equivalent, gently pry out on the two retaining tabs
and pull the sensor straight out of the retaining bezel
(Fig. 10).

INSTALLATION

(1) Position the Park Assist Sensor over the retain-

ing bezel and firmly snap into place (Fig. 10).

(2) Connect the electrical connector (Fig. 9).
(3) Install the rear fascia (Refer to 13 - FRAME &

BUMPERS/BUMPERS/REAR FASCIA - INSTALLA-
TION).

(4) Connect the battery negative cable.

PARK ASSIST SENSOR BEZEL

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Remove rear fascia (Refer to 13 - FRAME &

BUMPERS/BUMPERS/REAR FASCIA - REMOVAL).

(3) Disconnect the sensor electrical connector (Fig.

11).

(4) Using a trim stick (special tool #C-4755) or

equivalent, gently pry out on the two retaining tabs
and pull the sensor straight out of the retaining bezel
(Fig. 12).

(5) If the bezel (Fig. 13) is either damaged or bro-

ken during removal of the sensor, gently press in on
the bezel retaining tabs and then push bezel out of
fascia.

Fig. 9 PARK ASSIST SENSOR CONNECTOR

1 - PARK ASSIST SENSOR
2 - ELECTRICAL CONNECTOR

Fig. 10 PARK ASSIST SENSOR REMOVE/INSTALL

1 - SENSOR RETAINING TABS
2 - SENSOR RETAINING BEZEL
3 - PARK ASSIST SENSOR

Fig. 11 PARK ASSIST SENSOR CONNECTOR

1 - PARK ASSIST SENSOR
2 - ELECTRICAL CONNECTOR

8B - 8

CHIME/BUZZER

CS

PARK ASSIST SENSOR (Continued)

INSTALLATION

(1) If bezel (Fig. 13) was damaged and replaced,

align over hole in fascia and firmly snap into place.

(2) Position the Park Assist Sensor over the retain-

ing bezel and firmly snap into place (Fig. 12).

(3) Connect the electrical connector (Fig. 11).
(4) Install the rear fascia (Refer to 13 - FRAME &

BUMPERS/BUMPERS/REAR FASCIA - INSTALLA-
TION).

(5) Connect the battery negative cable.

Fig. 12 PARK ASSIST SENSOR REMOVE/INSTALL

1 - SENSOR RETAINING TABS
2 - SENSOR RETAINING BEZEL
3 - PARK ASSIST SENSOR

Fig. 13 PARK ASSIST SENSOR BEZEL

CS

CHIME/BUZZER

8B - 9

PARK ASSIST SENSOR BEZEL (Continued)