battery MERCEDES-BENZ SPRINTER 2006 Service Manual

(5) Pull SKREEM straight out of rear of instru-
ment cluster (Fig. 4) and remove from vehicle.
SENTRY KEY REMOTE ENTRY MODULE TRAN-
SPONDER RING
(1) Open hood, disconnect and isolate the battery
negative cable.
(2) Wait two minutes for the system reserve capac-
itor to discharge before beginning any system or com-
ponent service.
(3) Remove the steering column shrouds.
(4) Unsnap the SKREEM transponder from the
ignition cylinder (Fig. 5).(5) Remove top cover - cluster (Refer to 23 -
BODY/INSTRUMENT PANEL/TOP COVER - CLUS-
TER - REMOVAL).
(6) Disconnect the transponder electrical connector
from the SKREEM (Fig. 4).
(7) Maneuver wiring from instrument panel and
remove transponder from vehicle.
INSTALLATION
SENTRY KEY REMOTE ENTRY MODULE
(1) Push SKREEM straight into the rear of instru-
ment cluster (Fig. 4).
(2) Connect the one electrical connector to the
SKREEM (Fig. 4).
(3) Install the top cover - cluster (Refer to 23 -
BODY/INSTRUMENT PANEL/TOP COVER - CLUS-
TER - INSTALLATION)
(4) Connect the battery negative cable.
(5) Verify vehicle and system operation.
(6) Close hood.
SENTRY KEY REMOTE ENTRY MODULE TRAN-
SPONDER RING
(1) Maneuver wiring through instrument panel
(Fig. 5).
(2) Connect the transponder electrical connect or
to the SKREEM (Fig. 4).
(3) Install the top cover - cluster (Refer to 23 -
BODY/INSTRUMENT PANEL/TOP COVER - CLUS-
TER - INSTALLATION)
(4) Snap the SKREEM transponder in place
around the ignition cylinder (Fig. 5).
(5) Install the steering column shrouds.
(6) Connect the battery negative cable.
(7) Verify vehicle and system operation.
(8) Close hood.
SIREN
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove mounting fasteners.
(3) Disconnect wire harness connector from siren.
INSTALLATION
(1) Connect wire harness connector to siren.
(2) Position siren. Install and tighten mounting
fasteners.
(3) Connect battery negative cable.
Fig. 4 SENTRY KEY REMOTE ENTRY MODULE
(SKREEM) - REMOVE/INSTALL
1 - SENTRY KEY REMOTE ENTRY MODULE (SKREEM)
2 - INSTRUMENT CLUSTER (REAR)
3 - INSTRUMENT PANEL
Fig. 5 TRANSPONDER RING
1 - TRANSPONDER RING
2 - STEERING COLUMN
8Q - 4 VEHICLE THEFT SECURITYVA

other minor debris from the outside windshield glass
surface that might be encountered while driving the
vehicle under numerous types of inclement operating
conditions.
Two wiper systems are available: the standard
intermittent wipe system, or an optional automatic
wipe system. The vehicle operator initiates all wiper
and washer system functions with the multi-function
switch wiper control stalk that extends from the
right side of the steering column, just below the
steering wheel. Depressing, raising, or pulling the
right control stalk of the multi-function switch
selects the desired wiper system operating mode (Fig.
2). The wiper system allows the vehicle operator to
select from two continuous wiper speeds, Hi or Lo,
either a fixed interval intermittent wipe mode or an
auto wipe mode (as the vehicle is equipped), and a
pulse wipe mode. Pushing the knob on the end of the
control stalk towards the steering column activates
the washer pump/motor, which dispenses washer
fluid onto the windshield glass through the washer
nozzles.
The hard wired inputs to and outputs from the
wiper and washer system components may be diag-
nosed and tested using conventional diagnostic tools
and methods. Refer to the appropriate diagnostic
information. Refer to the owner's manual in the vehi-
cle glove box for more information on the features
and operation of the wiper and washer system.
INTERMITTENT WIPE SYSTEM
When the ignition switch is in the On position, bat-
tery current from a fuse in the fuse block underneath
the steering column is provided through a fused igni-
tion switch output (run-start) circuit to the intermit-tent wipe logic circuitry of the wiper, turn signals
and engine start control module within the fuse
block, the multi-function switch, the wiper relay and
the wiper motor park switch. The internal circuitry
of the multi-function switch provides a direct hard
wired battery current output to the low speed or high
speed brushes of the wiper motor when the Low,
High, or Pulse position is selected, which causes the
wipers to cycle at the selected speed for as long as
that switch position remains selected.
In order to provide the intermittent wipe and wipe-
after-wash features, the intermittent wipe logic cir-
cuitry of the wiper, turn signals and engine start
control module within the fuse block monitors inputs
from the intermittent wipe and washer switch cir-
cuitry of the multi-function switch and the park
switch in the wiper motor. When the intermittent
wipe position is selected with the multi-function
switch control stalk, the intermittent wipe logic cir-
cuitry responds by energizing the wiper relay and
calculating the correct delay interval. The energized
wiper relay directs battery current through the inter-
mittent wipe position circuitry of the multi-function
switch to the low speed brush of the wiper motor.
The intermittent wipe logic circuit monitors the
wiper motor operation through the wiper on/off relay
output circuit, which allows it to determine the
proper timing to begin the next wiper blade sweep.
The normal delay interval is about five seconds.
When the Off position of the multi-function switch
wiper control stalk is selected, one of two events is
possible. The event that will occur depends upon the
position of the wiper blades on the windshield at the
moment that the Off position is selected. If the wiper
blades are in the down position on the windshield
when the Off position is selected, the park switch
that is integral to the wiper motor is closed to
ground, the intermittent wipe logic circuit de-ener-
gizes the wiper relay, and the wiper motor ceases to
operate.
If the wiper blades are not in the down position on
the windshield at the moment the Off position is
selected, the park switch is closed to battery current
through the fused ignition switch output (run-start)
circuit. The intermittent wipe logic circuit energizes
the wiper relay and the wiper on-off relay output cir-
cuit directs battery current to the low speed brush of
the wiper motor through the normally open contact
of the wiper relay, then through the internal Off posi-
tion circuitry of the multi-function switch. This
causes the wiper motor to continue running until the
wiper blades are in the down position on the wind-
shield and the park switch is again closed to ground.
When the Wash position of the control knob on the
right control stalk of the multi-function switch is
selected, the washer switch circuitry directs battery
current to the washer pump motor and to the inter-
mittent wipe logic circuitry. When the washer switch
Fig. 2 Windshield Wiper/Washer Switch
1 - INTERMITTENT WIPE MODE (OR AUTO WIPE MODE IF
EQUIPPED)
2 - CONTINUOUS LOW SPEED WIPE MODE
3 - CONTINUOUS HIGH SPEED WIPE MODE
4 - WASHER MODE
5 - PULSE WIPE MODE
8R - 4 WIPERS/WASHERSVA

is closed with the wiper system turned Off, the inter-
mittent wipe logic circuitry operates the wiper motor
in the same manner as it does to provide the inter-
mittent wipe mode operation. After the state of the
washer switch changes to open, the intermittent wipe
logic circuitry monitors the wiper motor through the
wiper on-off relay output circuit, which allows it to
monitor the number of wiper blade sweeps. After the
appropriate number of wiper sweeps the intermittent
wipe logic circuitry operates the wiper motor to
return the wipers to their park position, then de-en-
ergizes the wiper relay.
AUTOMATIC WIPE SYSTEM
When the ignition switch is in the On position, bat-
tery current from a fuse in the fuse block underneath
the steering column is provided through a fused igni-
tion switch output (run-start) circuit to the rain sen-
sor control module under the instrument panel, to
the rain sensor within the base of the inside rear
view mirror on the windshield, and to the multi-func-
tion switch. The internal circuitry of the multi-func-
tion switch provides direct hard wired battery
current outputs to the rain sensor control module to
indicate the selected wiper operating mode. The con-
trol module logic monitors the inputs from the multi-
function switch as well as from the rain sensor and
the wiper motor park switch in order to provide the
outputs necessary to operate the wiper motor and the
washer pump motor as requested.
When the automatic wipe position is selected with
the multi-function switch control stalk, the rain sen-
sor control module logic circuitry responds by provid-
ing an acknowledgment sweep of the wipers. The
rain sensor calculates the correct wiper speed and
wiper sweep intervals required to remove the mois-
ture detected on the windshield glass and provides
this input to the rain sensor control module. The con-
trol module then energizes and de-energizes the
wiper motor automatically. The automatic wipe logic
will also provide a wipe-after-wash feature to clear
washer fluid that is directed onto the windshield
when the washer system is utilized.
When the Off position of the multi-function switch
wiper control stalk is selected, one of two events is
possible. The event that will occur depends upon the
position of the wiper blades on the windshield at the
moment that the Off position is selected. If the wiper
blades are in the down position on the windshield
when the Off position is selected, the park switch
that is integral to the wiper motor is closed to
ground, and the rain sensor control module logic cir-
cuit de-energizes the wiper motor. If the wiper blades
are not in the down position at the moment the Off
position is selected, the park switch is an open cir-
cuit. The control module logic circuit directs battery
current to the low speed brush of the wiper motor,
which causes the wiper motor to continue runninguntil the wiper blades are in the down position on
the windshield and the park switch is again closed to
ground.
When the Wash position of the control knob on the
right control stalk of the multi-function switch is
selected with the wiper system turned Off, the rain
sensor control module logic circuitry operates the
wiper motor in the same manner as it does to provide
the automatic wipe mode operation. After the state of
the washer switch changes to open the control mod-
ule monitors the wiper motor through the wiper park
switch sense circuit, which allows it to monitor the
number of wiper blade sweeps. After the appropriate
number of wiper sweeps the control module operates
the wiper motor to return the wipers to their park
position, then de-energizes the wiper motor.
OPERATING MODES
The components of the wiper and washer system
are designed to provide the following operating
modes:
²Automatic Wipe Mode- On vehicles so
equipped, the internal circuitry of the multi-function
switch, the rain sensor control module and the rain
sensor work in concert to provide wiper system oper-
ation automatically whenever moisture is detected on
the windshield glass.
²Continuous Wipe Mode- The two-speed wiper
motor, the internal circuitry of the multi-function
switch, and the wiper system logic circuits work in
concert to provide two continuous wipe cycles, low
speed or high speed.
²Intermittent Wipe Mode- On vehicles so
equipped, the internal circuitry of the multi-function
switch, the intermittent wipe circuitry of the wiper,
turn signals and engine start control module in the
fuse block, and the wiper relay work in concert to
provide an intermittent wipe mode with a single,
fixed delay interval.
²Pulse Wipe Mode- The internal circuitry of
the multi-function switch and the wiper system logic
circuits work in concert to provide a pulse wipe mode
that will allow the wiper motor to be operated for a
single, complete wipe cycle.
²Washer Mode- When the washer system is
activated with the multi-function switch while the
wiper system is operating, washer fluid will be dis-
pensed onto the windshield glass through the washer
nozzles for as long as the washer pump/motor is
energized.
²Wipe-After-Wash Mode- The wiper system
logic circuitry provides a wipe-after-wash feature. If
the wipers are turned Off, this feature will operate
the washer pump/motor and the wipers for as long as
the washer system is activated, then provide several
additional wipe cycles after the washer system is
deactivated before parking the wiper blades near the
base of the windshield.
VAWIPERS/WASHERS 8R - 5

DIAGNOSIS AND TESTING - WIPER &
WASHER SYSTEM
If the wiper motor operates, but the wipers do not
move on the windshield, replace the faulty wiper
linkage module. If the washer pump/motor operates,
but no washer fluid is dispensed on the glass; or, if
the wipers operate, but chatter, lift, or do not clear
the glass, clean and inspect the wiper and washer
system components as required. (Refer to 8 - ELEC-
TRICAL/WIPERS/WASHERS - CLEANING) and
(Refer to 8 - ELECTRICAL/WIPERS/WASHERS -
INSPECTION). For diagnosis and testing of the
multi-function switch (Refer to 8 - ELECTRICAL/
LAMPS/LIGHTING - EXTERIOR/MULTI-FUNC-
TION SWITCH - DIAGNOSIS AND TESTING).
Refer to the appropriate wiring information. The wir-
ing information includes wiring diagrams, proper
wire and connector repair procedures, details of wire
harness routing and retention, connector pin-out
information and location views for the various wire
harness connectors, splices and grounds.
The hard wired circuits and components of the
wiper and washer system may be diagnosed andtested using conventional diagnostic tools and proce-
dures. However, conventional diagnostic methods
may not prove conclusive in the diagnosis of the
intermittent wipe logic circuitry contained within the
fuse block underneath the steering column, the rain
sensor within the base of the rear view mirror on the
windshield, or the rain sensor control module under
the instrument panel.
WARNING: To avoid personal injury or death, on
vehicles equipped with airbags, disable the supple-
mental restraint system before attempting any
steering wheel, steering column, airbag, seat belt
tensioner, or instrument panel component diagno-
sis or service. Disconnect and isolate the battery
negative (ground) cable, then wait two minutes for
the system capacitor to discharge before perform-
ing further diagnosis or service. This is the only
sure way to disable the supplemental restraint sys-
tem. Failure to take the proper precautions could
result in accidental airbag deployment.
INTERMITTENT WIPER SYSTEM
CONDITION POSSIBLE CAUSES CORRECTION
WIPERS INOPERATIVE IN
ALL SWITCH POSITIONS1. Faulty or missing fuse. 1. Test and replace the fuse as required.
2. Faulty wiper motor ground circuit. 2. Test and repair the open ground circuit
as required.
3. Faulty multi-function switch feed
circuit.3. Test and repair the open fused ignition
switch output circuit between the fuse and
the multi-function switch as required.
4. Faulty multi-function switch. 4. Test and replace the multi-function
switch as required.
5. Faulty wiper motor. 5. Test and replace the wiper motor as
required.
WIPERS INOPERATIVE IN
INTERMITTENT POSITION
AND NO WIPE AFTER
WASH FEATURE1. Faulty wiper relay. 1. Test and replace the wiper relay as re-
quired.
2. Faulty multi-function switch. 2. Test and replace the multi-function
switch as required.
3. Faulty intermittent wipe logic cir-
cuit.3. Replace the steering column fuse block
as required.
WIPERS INOPERATIVE IN
LOW POSITION AND NO
PULSE FEATURE1. Faulty low speed circuit. 1. Test and repair the open low speed cir-
cuit between the multi-function switch and
the wiper motor as required.
2. Faulty multi-function switch. 2. Test and replace the multi-function
switch as required.
3. Faulty wiper low speed brush. 3. Test and replace the wiper motor as
required.
8R - 6 WIPERS/WASHERSVA

RAIN SENSOR
DESCRIPTION
The rain sensor provides the primary input for the
optional automatic wiper system (Fig. 6). The rain
sensor is located on the inside of the windshield,
where it is concealed within the molded plastic trim
cover that snaps over the base of the rear view mir-
ror arm. The sensor fits within the center of a ring-
like molded plastic bracket that is glued to the inside
of the windshield glass and that also serves as the
support for the rear view mirror.
The rain sensor is contained within a circular
molded black plastic housing with a short pigtail
wire and a connector insulator containing three ter-
minal cavities that exits one side of the housing. This
pigtail connects the rain sensor to the vehicle electri-
cal system through a dedicated take out and connec-
tor of the overhead wire harness that extends from
above the headliner. A molded plastic trough routes
and conceals the pigtail wires on the inside of the
windshield between the rear view mirror base and
the headliner.
The windshield side of the rain sensor housing is
open, but covered with a clear gelatin-like material
that protects the internal electronic sensor circuitry
and serves as the lens for the InfraRed (IR) diodes
and photocells within the sensor housing. This gel
coating must never be touched or the rain sensor
function may be impaired and the unit rendered
unusable. The rain sensor cannot be adjusted or
repaired and, if damaged or faulty, the entire sensor
must be replaced. The sensor bracket and a rear viewmirror adhesive kit are available for separate service
replacement.
OPERATION
The rain sensor operates on battery current and a
clean ground received from the rain sensor control
module. The rain sensor contains InfraRed (IR)
diodes that direct IR light beams at the windshield
at an angle. When the windshield glass is dry, most
of this IR light is reflected back to the sensor, which
uses photocell receivers to measure the intensity of
the light. When moisture accumulates on the wind-
shield glass, much of the IR light is refracted away
from the photocell receivers. This causes changes in
the signal output of the rain sensor. The rain sensor
control module monitors the signal output from the
sensor and then controls the wiper motor speed and
wipe intervals accordingly.
It is important to note that the default condition
for the wiper system is automatic wipers Off; there-
fore, if no message is received from the rain sensor
by the rain sensor control module, the automatic wip-
ers will be disabled. If automatic wipers are disabled,
normal low and high speed continuous wiper opera-
tion are unaffected. Also, due to the low voltage
nature of the rain sensor signal and the impact that
minor fluctuations in this signal strength can have
on wiper operation, grounded shielding circuits are
provided at the roof and control module connectors to
control electrical induction into the sensor signal cir-
cuit.
The hard wired rain sensor circuits may be diag-
nosed using conventional diagnostic tools and meth-
ods. However, conventional diagnostic methods may
not prove conclusive in the diagnosis of the internal
circuitry or the optics of the rain sensor. Refer to the
appropriate wiring information.
STANDARD PROCEDURE
RAIN SENSOR BRACKET REPLACEMENT
The rain sensor fits within the center of a ring-like
molded plastic bracket that is glued to the inside of
the windshield glass and that also serves as the sup-
port for the rear view mirror arm. If the bracket
should come loose from the windshield, it must be
reinstalled using a rear view mirror adhesive kit and
the procedure that follows.
Fig. 6 Rain Sensor
1 - HEADLINER
2 - TROUGH
3 - WINDSHIELD
4 - RAIN SENSOR
5 - MIRROR
8R - 12 WIPERS/WASHERSVA

WARNING: To avoid personal injury or death, on
vehicles equipped with airbags, disable the supple-
mental restraint system before attempting any
steering wheel, steering column, airbag, seat belt
tensioner, or instrument panel component diagno-
sis or service. Disconnect and isolate the battery
negative (ground) cable, then wait two minutes for
the system capacitor to discharge before perform-
ing further diagnosis or service. This is the only
sure way to disable the supplemental restraint sys-
tem. Failure to take the proper precautions could
result in accidental airbag deployment.
CAUTION: Do not touch the gel-like surface of the
rain sensor or the sensor function may be impaired
and the sensor rendered unusable.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the rear view mirror and the rain sen-
sor from the rain sensor bracket. (Refer to 8 - ELEC-
TRICAL/WIPERS/WASHERS/RAIN SENSOR -
REMOVAL).
(3) Cut diagonally through the nylon mesh fabric
from the rear view mirror adhesive kit (Fig. 7).
(4) Place the rain sensor bracket onto the nylon
mesh fabric (Fig. 8).(5) Cut the two sections of nylon mesh fabric to
the contours of the rain sensor.
NOTE: If the early version of the rain sensor
bracket is used, the nylon mesh material must be
cut so as not to lie over the bracket collar (Fig. 9).
(6) Complete the bracket installation following the
instructions provided with the rear view mirror adhe-
sive kit.
(7) Reinstall the rain sensor and the rear view
mirror onto the rain sensor bracket. (Refer to 8 -
ELECTRICAL/WIPERS/WASHERS/RAIN SENSOR -
INSTALLATION).
Fig. 7 Cut Nylon Mesh Fabric
1 - FABRIC
2 - DIAGONAL CUT
Fig. 8 Trim Nylon Mesh Fabric
1 - FABRIC
2 - BRACKET
Fig. 9 Rain Sensor Brackets
1 - COLLAR
2 - EARLY TYPE BRACKET
3 - LATE TYPE BRACKET
VAWIPERS/WASHERS 8R - 13

(8) Reconnect the battery negative cable.
REMOVAL
WARNING: To avoid personal injury or death, on
vehicles equipped with airbags, disable the supple-
mental restraint system before attempting any
steering wheel, steering column, airbag, seat belt
tensioner, or instrument panel component diagno-
sis or service. Disconnect and isolate the battery
negative (ground) cable, then wait two minutes for
the system capacitor to discharge before perform-
ing further diagnosis or service. This is the only
sure way to disable the supplemental restraint sys-
tem. Failure to take the proper precautions could
result in accidental airbag deployment.
(1) Disconnect and isolate the battery negative
cable.
(2) Unsnap the base covers from each other and
remove them from the rear view mirror arm at the
windshield (Fig. 10).
(3) Using a small thin-bladed screwdriver, gently
pry the retaining collar slightly upward while press-
ing the mirror arm downward parallel to the wind-
shield until the mirror arm unsnaps from the
bracket.
(4) Separate and remove the two halves of the
wire cover from the rain sensor pigtail wires.(5) Loosen the screws securing both inner sun
visor hinges to the windshield header.
(6) Pull the headliner down from the windshield
header far enough to pull the rain sensor pigtail wire
connector out from under the headliner.
(7) Remove the anti-rattle felt from the wire con-
nector insulators.
(8) Disconnect the sensor pigtail wire connector
from the roof wire harness connector.
CAUTION: Do not touch the gel-like surface of the
rain sensor or the sensor function may be impaired
and the sensor rendered unusable.
(9) Remove the rain sensor from the center of the
bracket.
INSTALLATION
WARNING: To avoid personal injury or death, on
vehicles equipped with airbags, disable the supple-
mental restraint system before attempting any
steering wheel, steering column, airbag, seat belt
tensioner, or instrument panel component diagno-
sis or service. Disconnect and isolate the battery
negative (ground) cable, then wait two minutes for
the system capacitor to discharge before perform-
ing further diagnosis or service. This is the only
sure way to disable the supplemental restraint sys-
tem. Failure to take the proper precautions could
result in accidental airbag deployment.
CAUTION: Do not touch the gel-like surface of the
rain sensor or the sensor function may be impaired
and the sensor rendered unusable.
(1) Position the rain sensor into the center of the
bracket on the windshield (Fig. 10).
(2) Reconnect the sensor pigtail wire connector to
the roof wire harness connector.
(3) Reinstall the anti-rattle felt over the wire con-
nector insulators.
(4) Pull the headliner down from the windshield
header far enough to tuck the rain sensor pigtail
wire connector under the headliner.
(5) Tighten the screws securing both inner sun
visor hinges to the windshield header.
(6) Align and install the two halves of the wire
cover over the rain sensor pigtail wires.
(7) Press the rear view mirror arm upward paral-
lel to the windshield until the mirror arm snaps onto
the bracket.
(8) Align and position the base covers to each
other and snap them over the rear view mirror arm
at the windshield.
(9) Reconnect the battery negative cable.
Fig. 10 Rain Sensor Remove/Install
1 - FELT
2 - CONNECTOR
3 - INNER VISOR HINGE (2)
4 - WIRE COVER
5 - BRACKET
6 - SENSOR
7 - RETAINING COLLAR
8 - BASE COVER
9 - MIRROR
10 - ARM
8R - 14 WIPERS/WASHERSVA

RAIN SENSOR CONTROL MOD-
ULE
DESCRIPTION
The Rain Sensor Control Module (RSCM) is the
primary component of the automatic wiper system
(Fig. 11). The RSCM is secured with two screws and
nuts to a bracket located under the instrument panel
above the throttle pedal within the passenger com-
partment. The rectangular molded plastic housing of
the RSCM has an integral mounting tab on each side
and an integral connector receptacle on one end,
which contains the module terminal pins. These ter-
minal pins connect the RSCM to the vehicle electrical
system through a dedicated take out and connector of
the instrument panel wiring. Concealed and pro-
tected within the RSCM housing is the electronic cir-
cuitry of the module.
The RSCM cannot be repaired and, if damaged or
faulty, the entire module must be replaced.
OPERATION
The microprocessor-based Rain Sensor Control
Module (RSCM) is only used in vehicles equipped
with an optional automatic wiper system. The RSCM
monitors inputs from the ignition switch, the wiper
and washer switch circuitry of the multi-function
switch on the steering column, the park switch
within the wiper motor, and the rain sensor on the
inside of the windshield glass. Based upon these
inputs the RSCM sends the proper control outputs to
the wiper motor and the washer pump motor to pro-
vide all of the requested wiper and washer system
functions.The RSCM operates on battery current received
from a fuse in the fuse block on a fused ignition
switch output (run-start) circuit so that the RSCM
will operate whenever the ignition switch is in the
On or Start positions. The RSCM receives ground at
all times through its connection to the instrument
panel wire harness. It is important to note that the
default condition for the wiper system is automatic
wipers Off; therefore, if no input is received from the
rain sensor by the RSCM, the automatic wipers will
be disabled and the RSCM will default the wiper and
washer system to normal manual operation for con-
tinuous low or high speed wiper or washer mode.
The hard wired RSCM circuits may be diagnosed
using conventional diagnostic tools and methods.
However, conventional diagnostic methods may not
prove conclusive in the diagnosis of the internal cir-
cuitry of the RSCM. Refer to the appropriate wiring
information.
REMOVAL
WARNING: To avoid personal injury or death, on
vehicles equipped with airbags, disable the supple-
mental restraint system before attempting any
steering wheel, steering column, airbag, seat belt
tensioner, or instrument panel component diagno-
sis or service. Disconnect and isolate the battery
negative (ground) cable, then wait two minutes for
the system capacitor to discharge before perform-
ing further diagnosis or service. This is the only
sure way to disable the supplemental restraint sys-
tem. Failure to take the proper precautions could
result in accidental airbag deployment.
(1) Disconnect and isolate the battery negative
cable.
(2) Locate the rain sensor control module on a
bracket under the instrument panel above the throt-
tle pedal (Fig. 12).
Fig. 11 Rain Sensor Control Module
1 - RAIN SENSOR CONTROL MODULE
2 - CONNECTOR RECEPTACLE
3 - MOUNTING TAB (2)
VAWIPERS/WASHERS 8R - 15

(3) Cut the tie wrap on the control module (Fig.
13).
(4) Unlock and disconnect the wire harness con-
nector from the module connector receptacle.
(5) Remove the two screws and nuts that secure
the module to the bracket.
(6) Remove the module from the bracket.
INSTALLATION
WARNING: To avoid personal injury or death, on
vehicles equipped with airbags, disable the supple-
mental restraint system before attempting any
steering wheel, steering column, airbag, seat belt
tensioner, or instrument panel component diagno-
sis or service. Disconnect and isolate the battery
negative (ground) cable, then wait two minutes for
the system capacitor to discharge before perform-
ing further diagnosis or service. This is the only
sure way to disable the supplemental restraint sys-
tem. Failure to take the proper precautions could
result in accidental airbag deployment.
(1) Position the rain sensor control module to the
bracket under the instrument panel above the throt-
tle pedal (Fig. 12).
(2) Install and tighten the two screws and nuts
that secure the module to the bracket (Fig. 13).
(3) Reconnect and lock the wire harness connector
to the module connector receptacle.
(4) Install a new tie wrap to secure the wire har-
ness to the control module.
(5) Reconnect the battery negative cable.
WASHER FLUID LEVEL
SWITCH
DESCRIPTION
The optional washer fluid level switch is a single
pole, single throw switch that is integral to a unique
version of the washer pump/motor unit, located rear-
ward facing side of the washer reservoir, which is
located in a dedicated hole on the top of the sump
area near the back of the windshield washer reser-
voir on the right front fender wheel house in the
engine compartment. Only a molded plastic nipple
with a clear vent tube are visible near the top of the
washer pump/motor unit that is equipped with the
optional fluid level switch when it is installed in the
reservoir. The vent tube is routed to and retained in
an integral clip located behind the reservoir filler cap
near the top of the reservoir. This version of the
washer pump/motor unit also has a third terminal
pin in its integral connector receptacle. The washer
fluid level switch cannot be adjusted or repaired. If
faulty or damaged, the entire washer pump/motor
unit must be replaced.
OPERATION
The washer fluid level switch monitors the level of
the washer fluid in the washer reservoir. When the
fluid level in the washer reservoir is at or above the
predetermined minimum, the switch contacts are
open. When the fluid level in the washer reservoir
Fig. 12 Rain Sensor Control Module Location
1 - INSTRUMENT PANEL
2 - RAIN SENSOR CONTROL MODULE
3 - THROTTLE PEDAL
Fig. 13 Rain Sensor Control Module Remove/Install
1 - SCREW (2)
2 - CONNECTOR
3 - NUT (2)
4 - TIE WRAP
5 - MODULE
8R - 16 WIPERS/WASHERSVA

OPERATION
The washer pump/motor unit is connected to the
vehicle electrical system through a single take out
and connector of the vehicle wire harness. The
washer pump/motor is grounded at all times through
a take out of the vehicle wire harness with a single
eyelet terminal connector that is secured under a
ground screw located near the right headlamp in the
engine compartment. The washer pump/motor
receives battery current on a washer switch sense
circuit through the closed contacts of the momentary
washer switch circuitry within the multi-function
switch. When the pump motor is energized, the rotor-
type pump pressurizes the washer fluid and forces it
through the pump outlet nipple, the washer plumb-
ing, and the washer nozzles onto the windshield
glass. The washer pump/motor unit can be diagnosed
using conventional diagnostic tools and methods.
REMOVAL
(1) Disconnect the vehicle wire harness connector
for the washer pump/motor from the motor connector
receptacle (Fig. 18).
(2) Disconnect the washer supply hose from the
barbed outlet nipple of the washer pump/motor and
allow the washer fluid to drain into a clean container
for reuse.(3) If the vehicle is so equipped, disconnect the
washer fluid level switch vent hose from the barbed
vent nipple near the top of the washer pump/motor
unit.
(4) Using hand pressure, firmly grasp and pull the
washer pump out of the rubber grommet seal in the
reservoir. Care must be taken not to damage the res-
ervoir.
(5) Remove the rubber grommet seal from the
washer pump mounting hole in the washer reservoir
and discard.
INSTALLATION
(1) Install a new rubber grommet seal into the
washer pump mounting hole in the washer reservoir.
Always use a new rubber grommet seal on the reser-
voir.
(2) Position the inlet nipple of the washer pump to
the rubber grommet seal in the reservoir.
(3) Using hand pressure, press firmly and evenly
on the washer pump until the inlet nipple is fully
seated in the rubber grommet seal in the washer res-
ervoir mounting hole (Fig. 18).
(4) If the vehicle is so equipped, reconnect the
washer fluid level switch vent hose to the barbed
vent nipple at the top of the washer pump/motor
housing.
(5) Reconnect the washer hose to the barbed outlet
nipple of the washer pump.
(6) Reconnect the vehicle wire harness connector
for the washer pump/motor unit to the motor connec-
tor receptacle.
(7) Refill the washer reservoir with the washer
fluid drained from the reservoir during the removal
procedure.
Fig. 18 Washer Pump/Motor Remove/Install
1 - WASHER RESERVOIR
2 - WASHER SUPPLY HOSE
3 - VENT HOSE (W/FLUID LEVEL SWITCH ONLY)
4 - WIRE HARNESS CONNECTOR
5 - WASHER PUMP/MOTOR
8R - 20 WIPERS/WASHERSVA