Chrysler Pacifica. Manual — part 546

INSTALLATION

(1) Place the rear wiper arm on the rear wiper

motor shaft. align the wiper blade with lower EBL
line.

(2) Install the rear wiper am retaining nut (Fig. 6).

Torque nut to 9 ± 1.5 N·m (80 ± 15 in. lbs.).

(3) Flip down the rear wiper arm nut cover. (Fig.

6).

(4) Verify wiper arm position. Adjust as necessary.

REAR WIPER MOTOR

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Remove rear wiper arm (Refer to 8 - ELECTRI-

CAL/WIPERS/WASHERS/REAR

WIPER

ARM

-

REMOVAL).

(3) Open liftgate, remove liftgate trim panel (Refer

to 23 - BODY/INTERIOR/LIFTGATE TRIM PANEL -
REMOVAL).

(4) Disconnect the rear wiper motor electrical con-

nector (Fig. 7).

(5) Remove the three rear wiper motor mounting

screws (Fig. 8).

(6) Remove rear wiper motor from liftgate/vehicle.

Fig. 6 REAR WIPER ARM - REMOVE/INSTALL

1 - REAR WIPER ARM

3 - REAR WIPER ARM RETAINING NUT COVER

2 - REAR WIPER ARM RETAINING NUT

Fig. 7 REAR WIPER MOTOR ELECTRICAL

CONNECTOR

1 - REAR WIPER MOTOR MOUNTING SCREW
2 - LIFTGATE
3 - REAR WIPER MOTOR ELECTRICAL CONNECTOR

CS

WIPERS/WASHERS

8R - 13

REAR WIPER ARM (Continued)

INSTALLATION

(1) Position the rear wiper motor into position on

the liftgate and install the three rear wiper motor
mounting screws (Fig. 8). Torque screws to 6 ± 1 N·m
(55 ± 10 in. lbs.).

(2) Connect the rear wiper motor electrical connec-

tor (Fig. 7).

(3) Install the liftgate trim panel (Refer to 23 -

BODY/INTERIOR/LIFTGATE

TRIM

PANEL

-

INSTALLATION).

(4) Install the rear wiper arm (Refer to 8 - ELEC-

TRICAL/WIPERS/WASHERS/REAR WIPER ARM -
INSTALLATION).

(5) Connect the battery negative cable.
(6) Verify vehicle and system operation.

RIGHT MULTI-FUNCTION
SWITCH

DESCRIPTION

The right (wiper) multi-function switch is secured

to the right side of the multi-function switch mount-
ing housing at the top of the steering column, just
below the steering wheel (Fig. 9). The only visible
component of the right multi-function switch is the
control stalk that extends through a dedicated open-

ing in the right side of the steering column shrouds.
The remainder of the right multi-function switch is
concealed beneath the steering column shrouds. The
switch is secured to the multi-function switch mount-
ing housing near the top of the steering column by
two screws.

The control stalk has a control knob on its end

with a flattened face to allow it to be easily rotated.
Just below the control knob is a knurled control
sleeve. The right multi-function switch is the primary
control for the front and rear wiper and washer sys-
tems, and contains switches and circuitry to provide
signals to the Body Control Module (BCM) and the
rear wiper motor.

The right (wiper) multi-function switch cannot be

adjusted or repaired. If any function of the switch is
faulty, or if the switch is damaged, the entire switch
unit must be replaced.

The right (wiper) multi-function switch supports:
• Continuous Front Wipe Modes - The internal

circuitry and hardware of the right (wiper) multi-
function switch control knob provide two continuous
front wipe switch positions, low speed or high speed.

• Continuous Rear Wipe Mode - The internal

circuitry and hardware of the right (wiper) multi-
function switch control sleeve provides one continu-
ous rear wipe switch position.

• Front Washer Mode - The internal circuitry

and hardware of the right (wiper) multi-function
switch control stalk provide front washer system
operation.

• Front Wipe-After-Wash Mode - The internal

circuitry and hardware of the right (wiper) multi-

Fig. 8 REAR WIPER MOTOR - REMOVE/INSTALL

1 - LIFTGATE
2 - REAR WIPER BLADE/ARM
3 - REAR WIPER ARM RETAINING NUT
4 - REAR WIPER MOTOR ELECTRICAL CONNECTOR
5 - REAR WIPER MOTOR
6 - REAR WIPER MOTOR MOUNTING SCREWS

Fig. 9 RIGHT (WIPER) MULTI-FUNCTION SWITCH -

TYPICAL

1 - CONTROL STALK
2 - REAR WIPER CONTROL SLEEVE
3 - FRONT WIPER CONTROL KNOB
4 - RIGHT (WIPER) MULTI-FUNCTION SWITCH

8R - 14

WIPERS/WASHERS

CS

REAR WIPER MOTOR (Continued)

function switch control stalk provide a wipe-after-
wash mode.

• Front Wiper Mist Mode - The internal cir-

cuitry and hardware of the right (wiper) multi-func-
tion switch control stalk provide a front wiper system
mist mode.

• Intermittent Front Wipe Mode - The internal

circuitry and hardware of the right (wiper) multi-
function switch control knob provide an intermittent
front wipe mode with five delay interval positions,
except on models equipped with the optional auto-
matic wiper system.

• Intermittent Rear Wipe Mode - The internal

circuitry and hardware of the right (wiper) multi-
function switch control ring provide one fixed inter-
val intermittent rear wipe mode switch position.

• Rear Washer Mode - The internal circuitry and

hardware of the right (wiper) multi-function switch
control stalk provide rear washer system operation.

OPERATION

The right (wiper) multi-function switch uses a com-

bination of resistor multiplexed and conventionally
switched outputs to control the many functions and
features it provides. The switch receives battery cur-
rent on a fused ignition switch output (run-acc) cir-
cuit from a fuse in the Integrated Power Module
(IPM) whenever the ignition switch is in the On or
Accessory positions, and receives ground from the
Body Control Module (BCM) on a windshield wiper
switch return circuit. The right (wiper) multi-func-
tion switch may be diagnosed using conventional
diagnostic tools and methods.

• Continuous Front Wipe Modes - The control

knob on the end of the right (wiper) multi-function
switch control stalk is rotated to an intermediate
detent that is one detent rearward (counterclockwise)
from the full forward (clockwise) detent to select the
low speed continuous front wiper mode, or to its full
forward (clockwise) detent to select the high speed
continuous front wiper mode. For the low speed
mode, the multi-function switch provides a resistor
multiplexed output to the Body Control Module
(BCM) on a windshield wiper switch mux circuit, and
the BCM responds by sending a bus message to the
IPM to energize the wiper on/off relay in the IPM for
the front low speed continuous wipe mode. For the
high speed mode, the multi-function switch provides
the same resistor multiplexed output to the BCM on
the windshield wiper switch mux circuit as the low
speed mode, but also provides a ground output to the
BCM on a wiper high control circuit. The BCM
responds to these inputs by sending a bus message to
the IPM to energize the wiper on/off relay and the
wiper high/low relay in the IPM for the front high
speed continuous wipe mode.

• Continuous Rear Wipe Mode - The control

ring on the right (wiper) multi-function switch con-
trol stalk is rotated to the most forward (clockwise)
detent to select the continuous rear wiper mode. The
multi-function switch provides a battery current out-
put to the rear wiper motor on a rear wiper motor
control circuit to signal the rear wiper module to
operate the rear wiper motor in the continuous wipe
mode.

• Front Washer Mode - The control stalk of the

right (wiper) multi-function switch is pulled toward
the steering wheel to momentarily activate the front
washer pump/motor in the front washer mode. The
front washer pump will continue to operate in the
front washer mode until the control stalk is released.
The right (wiper) multi-function switch provides a
battery current output to the BCM which will in turn
send a buss message to the IPM to provide power to
the washer pump motor to energize the front washer
pump in the front washer mode.

• Front Wiper Mist Mode - The control stalk of

the right (wiper) multi-function switch is pushed
towards the floor to momentarily activate the front
wiper motor in the mist mode. The front wiper motor
will continue to operate in the mist mode until the
control stalk is released. The right (wiper) multi-
function switch provides a resistor multiplexed out-
put to the Body Control Module (BCM) on a
windshield wiper switch mux circuit, and the BCM
responds sending a bus message to the IPM to ener-
gize the wiper on/off relay in the IPM to operate the
front wiper motor momentarily at low speed to pro-
vide the front wiper mist mode.

• Intermittent Front Wipe Mode - The control

knob on the end of the right (wiper) multi-function
switch control stalk is rotated to one of five minor
intermediate detents to select the desired intermit-
tent front wipe delay interval. The control knob is
rotated rearward (counterclockwise) to increase the
delay, or forward (clockwise) to decrease the delay.
The right (wiper) multi-function switch provides a
resistor multiplexed output to the Body Control Mod-
ule (BCM) on a windshield wiper switch mux circuit.
The BCM responds by monitoring electronic vehicle
speed messages received from the Next Generation
Controller (NGC) over the Programmable Communi-
cations Interface (PCI) data bus, then sends a bus
message to the IPM to energize the wiper on/off relay
in the IPM to operate the front wiper motor at the
proper delay intervals.

• Intermittent Rear Wipe Mode - The control

ring on the right (wiper) multi-function switch con-
trol stalk is rotated to the center detent to select the
intermittent rear wiper mode. The right (wiper)
multi-function switch provides a battery current out-
put to the rear wiper motor on a rear wiper motor

CS

WIPERS/WASHERS

8R - 15

RIGHT MULTI-FUNCTION SWITCH (Continued)

delay control circuit to signal the rear wiper module
to operate the rear wiper in the intermittent wipe
mode.

• Rear Washer Mode - The right (wiper) multi-

function switch control stalk is pushed forward
toward the instrument panel to a momentary posi-
tions to activate the rear washer pump/motor in the
rear washer mode. The rear washer pump will con-
tinue to operate in the rear washer mode until the
control stalk is released. The right (wiper) multi-
function switch outputs information to the BCM
which will in turn send a bus message to the IPM to
energize the rear washer pump motor in the rear
washer mode.

DIAGNOSIS AND TESTING - RIGHT MULTI-
FUNCTION SWITCH

(1) Disconnect and isolate the battery negative

cable.

(2) Remove the right multi-function switch from

the steering column and disconnect the instrument
panel wire harness connector for the switch from the
switch connector (Refer to 8 - ELECTRICAL/WIP-
ERS/WASHERS/RIGHT

MULTI-FUNCTION

SWITCH - REMOVAL).

(3) Using an ohmmeter, check the right multi-func-

tion switch continuity and resistances at the switch
terminals as shown in the RIGHT (WIPER) MULTI-
FUNCTION SWITCH CONTINUITY/RESISTANCE.

RIGHT (WIPER) MULTI-FUNCTION SWITCH CONTINUITY/RESISTANCE

FRONT WIPER/WASHER SWITCH

SWITCH POSITION

CONTINUITY BETWEEN

RESISTANCE

BETWEEN

RESISTANCE

Off

-

Pins 7 & 8

4286-4379

V

Intermittent Wipe 1

-

Pins 7 & 8

1445-1480

V

Intermittent Wipe 2

-

Pins 7 & 8

847-870

V

Intermittent Wipe 3

-

Pins 7 & 8

556-573

V

Intermittent Wipe 4

-

Pins 7 & 8

367-380

V

Intermittent Wipe 5

-

Pins 7 & 8

218-229

V

Low Speed

-

Pins 7 & 8

99-106

V

High Speed

Pins 7 & 9

Pins 7 & 8

99-106

V

Mist

-

Pins 7 & 8

49-56

V

Wash

Pins 1 & 3

-

-

REAR WIPER/WASHER SWITCH

Off

-

-

-

Delay

Pins 1 & 6

-

-

On

Pins 1 & 5

-

-

Wash

Pins 1 & 5 & 6 & 2

-

-

(4) If the right multi-function switch fails any of

the continuity or resistance tests, replace the faulty
right multi-function switch as required.

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Wait two minutes for the airbag system reserve

capacitor to discharge before beginning any steering
column service.

(3) Remove the upper and lower steering column

shrouds (Fig. 10)(Refer to 19 - STEERING/COLUMN/
UPPER SHROUD - REMOVAL) and (Refer to 19 -
STEERING/COLUMN/LOWER

SHROUD

-

REMOVAL).

(4) Disconnect the instrument panel wire harness

connector for the right multi-function switch.

(5) Remove the two screws that secure the right

multi-function switch to the multi-function switch
mounting housing (Fig. 11).

(6) Remove the right multi-function switch from

the multi-function switch mounting housing.

8R - 16

WIPERS/WASHERS

CS

RIGHT MULTI-FUNCTION SWITCH (Continued)