Chime/buzzer - Service Information: Removal & Installation RAM Pickup 3500

REMOVAL

1. Lower the headliner to access the module. Refer to «HEADLINER , Removal»(ref-457777-S39657840342012030200000) .
2. Disconnect the two body wire harness connectors (5) from the park assist module connector receptacles.
3. Remove the two fasteners (4) that secure the module to the mounting bracket.
4. Remove the module from behind the headliner.

INSTALLATION

1. Position the park assist module (1) at the mounting bracket (2) bonded to the back of the headliner (3).
2. Secure the module to the bracket with two fasteners (4).
3. Reconnect the two body wire harness connectors (5) to the module connector receptacles.
4. Reinstall the vehicle headliner. Refer to «HEADLINER , Installation»(ref-457777-S18376966342012030200000) .
5. Reconnect the battery negative cable.

Scheme 5

Vehicles equipped with the park assist system have four park assist sensors (1) installed on the rear bumper. Only the membrane (3) of each sensor is visible through a hole in the outer vertical surface of the bumper. The remainder of each sensor including the sensor mounting bracket, the sensor spacer and the sensor wiring connection is concealed behind the bumper. A sensor wire harness behind the bumper connects the sensors to the vehicle electrical system.

Each of the four sensors is identical in construction and is interchangeable. The electronic circuitry and a communication chip for each sensor is enclosed and protected within the molded black plastic sensor housing. The housing includes an integral connector receptacle (4) and two integral latch tabs (2). The sensor membrane extends from the surface of the sensor housing, and is finished to match or contrast with the outer surface of the bumper.

Scheme 6

The numbering system for the park assist sensors allows for up to twelve sensors on the vehicle, six front and six rear. The sensors are numbered in a clockwise manner starting at the left front bumper. The left front sensor (if equipped with front park assist) is the number 1 sensor. The numbering continues in a clockwise direction around the vehicle. Since this vehicle uses only four rear sensors, sensor numbers 7 and 12 are omitted, so the left rear sensor is the number 11 sensor.

Scheme 7

A resilient O-ring spacer around the circumference of each of the four sensor membranes (2) isolates the membrane from the openings in the fascia (1). Each sensor is snapped into its own dedicated molded plastic mounting bracket.

The park assist sensors cannot be adjusted or repaired. If inoperative or damaged they must be replaced. The sensors and the spacers are each available for individual service replacement.

Note. The park assist sensors (3) and the sensor spacers (O-rings) are each available for separate service replacement.

1. If removed, insert the sensor mounting bracket into the opening in the bumper face, until all locking tabs engage.
2. Engage the O-ring spacer around the circumference of the sensor membrane protrusion. NOTE: Production and all service replacement O-ring spacers are tapered. The wide side (base) of the O-ring should be seated against the sensor housing and the narrow side should be oriented toward the outer surface of the sensor membrane and the rear bumper.
3. Align and insert the sensor (3) into the sensor bracket (5) on the back of the rear bumper (2) until the bracket latch features (1) are fully engaged over the top and bottom latch tabs of the sensor. Be certain that the sensor membrane is flush with the outer surface of the bumper. NOTE: Be certain that each sensor membrane is properly centered in the openings of the rear fascia and that the O-ring spacers are not pinched. Improper centering or pinched O-rings can be detrimental to proper park assist sensor operation.
4. From the back of the bumper, reconnect the wire harness connector (4) to the sensor connector receptacle.
5. Reconnect the battery negative cable.