INFINITI QX56 2004 Factory Service Manual

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FRONT WIPER AND WASHER SYSTEM
Revision: August 20072004 QX56
2. IPDM E/R TO FRONT WIPER MOTOR CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and front wiper motor connector.
3. Check continuity between IPDM E/R harness connector terminal
and front wiper motor harness connector terminal.
4. Check continuity between IPDM E/R harness connector terminal
and ground.
OK or NG
OK >> Connect connectors. GO TO 3.
NG >> Repair harness or connector.
3. IPDM E/R TO FRONT WIPER MOTOR AUTO STOP CIRCUIT INSPECTION
1. Turn ignition switch ON.
2. While front wiper motor is stopped and while operating, measure
voltage between IPDM E/R terminal 43 and ground.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-29, "Removal and
Installation of IPDM E/R" .
NG >> Replace front wiper motor. Refer to WW-29, "
Removal and Installation of Wiper Motor and Link-
age" .
IPDM E/R Front wiper motor
Continuity
ConnectorTe r m i n a l
(wire color)ConnectorTe r m i n a l
(wire color)
E122 43 (L/Y) E23 6 (L/Y) Yes
WKIA2084E
IPDM E/R
Continuity
Connector Terminal (wire color)
E122 43 (L/Y) Ground No
WKIA2088E
IPDM E/R
(–) ConditionVoltag e
(Approx.) (+)
ConnectorTe r m i n a l
(wire color)
E122 43 (L/Y) GroundWiper operating Fluctuating
Wiper stopped 0V
WKIA2085E

FRONT WIPER AND WASHER SYSTEM
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Removal and Installation of Front Wiper Arms, Adjustment of Wiper Arms Stop
Location
EKS007FH
REMOVAL
1. Operate the wiper motor, and stop it at the auto stop position.
2. Remove the wiper arm mounting covers.
3. Remove the wiper arm mounting nuts, then remove the wiper arms.
INSTALLATION
1. Prior to wiper arm installation, turn on wiper switch to operate
wiper motor and then turn it “OFF” (Auto Stop).
2. Lift the blade up and then set it down onto glass surface to set
the blade center to clearance “L1” and “L2” immediately before
tightening nut.
3. Eject washer fluid. Turn on wiper switch to operate wiper motor
and then turn it “OFF”.
4. Ensure that wiper blades stop within clearance “L1” and “L2”.

Before reinstalling wiper arm, clean up the pivot area as illus-
trated. This will reduce possibility of wiper arm looseness.

Tighten wiper arm nuts to specified torque.
Removal and Installation of Wiper Motor and Linkage EKS007FI
REMOVAL
1. Operate the wiper motor, and stop it at the auto stop position.Clearance “L1” : 41.5 - 56.5 mm (1.634 - 2.224 in)
Clearance “L2” : 52.5 - 67.5 mm (2.067 - 2.657 in)
Front wiper arm
nuts: 23.6 N·m
(2.4 kg-m, 17 ft-lb)
SEL543TA
SEL024J
LKIA0408E
1. Wiper arm mounting covers 2. Wiper arm mounting nuts 3. Front RH wiper arm and blade assembly
4. Wiper frame mounting bolts 5. Wiper frame assembly 6. Wiper motor to frame mounting bolts
7. Wiper motor mounting spacer 8. Wiper motor 9. Front LH wiper arm and blade assembly

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FRONT WIPER AND WASHER SYSTEM
Revision: August 20072004 QX56
2. Remove wiper arms from the vehicle. Refer to WW-29, "Removal and Installation of Front Wiper Arms,
Adjustment of Wiper Arms Stop Location" .
3. Remove the cowl top extension. Refer to EI-18, "
COWL TOP" .
4. Disconnect wiper motor connector.
5. Remove cowl top extension bracket.
6. Remove wiper frame assembly mounting bolts, and remove
wiper frame assembly.
7. Remove wiper motor from wiper frame assembly.
INSTALLATION
CAUTION:

Do not drop the wiper motor or cause it to contact other parts.

Check the grease conditions of the motor arm and wiper link joint(s). Apply grease if necessary.
1. Connect wiper motor to connector. Turn the wiper switch ON to operate wiper motor, then turn the wiper
switch OFF (auto stop).
2. Disconnect wiper motor connector.
3. Install wiper motor to wiper frame assembly, and install assembly into the vehicle.
4. Install cowl top extension bracket.
5. Connect wiper motor connector. Turn the wiper switch ON to operate the wiper motor, then turn wiper
switch OFF (auto stop).
6. Install cowl top extension. Refer to EI-18, "
COWL TOP" .
7. Install wiper arms. Refer to WW-29, "
Removal and Installation of Front Wiper Arms, Adjustment of Wiper
Arms Stop Location" .
Washer Nozzle Adjustment EKS007FJ

This vehicle is equipped with non-adjustable washer nozzles.

If not satisfied with washer fluid spray coverage, confirm that the
washer nozzle is installed correctly.

If the washer nozzle is installed correctly, and the washer fluid
spray coverage is not satisfactory, replace washer nozzle.
LKIA0409E
PKIA2552E

FRONT WIPER AND WASHER SYSTEM
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Washer Tube Layout EKS007FK
Removal and Installation of Wiper and Washer Switch EKS007FL
REMOVAL
1. Remove steering column covers.
2. Remove wiper washer switch connector.
3. Pinch tabs at wiper and washer switch base and slide switch
away from steering column to remove.
INSTALLATION
Installation is in the reverse order of removal.
Removal and Installation of Washer Tank EKS007FM
REMOVAL
1. Remove side washer tank screw.
WKIA1923E
WKIA0071E
LKIA0411E

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FRONT WIPER AND WASHER SYSTEM
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2. Remove front and rear washer motor connector, washer fluid
level sensor connector, and front and rear washer hoses.
3. Remove front washer tank screw, then remove washer tank.
INSTALLATION
CAUTION:
After installation, add water up to the upper level of the washer tank inlet, and check for water leaks.
Installation is in the reverse order of removal.
Removal and Installation of Washer Motor EKS007FN
1. Remove washer tank. Refer to WW-31, "Removal and Installation of Washer Tank" .
2. Pull out front and rear washer motor in the direction of the arrow
as shown, and remove the front and rear washer motor from the
washer tank.
CAUTION:
When installing front and rear washer motor, there should be no
packing twists, etc.
LKIA0412E
LKIA0413E
Washer tank installation screws: 5.5 N·m
(0.56 kg-m, 49 in-lb)
LKIA0414E

REAR WIPER AND WASHER SYSTEM
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REAR WIPER AND WASHER SYSTEMPFP:28710
Components Parts and Harness Connector LocationEKS007FO
System DescriptionEKS007FP

The wiper switch (combination switch) is composed of a combination of 5 output terminals and 5 input ter-
minals. Terminal combination status is read by the BCM (body control module) when switch is turned ON.

The BCM controls rear wiper ON and INT (intermittent) operation.
Power is supplied at all times

through 50A fusible link (letter f , located in the fuse and fusible link box)

to BCM terminal 70.
With the ignition switch in ON or START position, power is supplied at all times

through 10A fuse (No. 9, located in the fuse block J/B)

to combination switch terminal 14, and

through 10A fuse (No. 59, located in the fuse and relay box)

to BCM terminal 38.
Ground is supplied

to BCM terminal 67 and

to combination switch terminal 12

through grounds M57, M61 and M79.
REAR WIPER OPERATION
When the ignition switch is in the ON or START position, and the rear wiper switch is in the ON position, the
BCM detects a rear wiper ON request through the combination switch (wiper switch) reading function.
The BCM will first check the status of the glass hatch ajar switch before supplying power to the rear wiper
motor. If the glass hatch ajar switch is closed (ground) the BCM will not turn on the rear wiper motor. If the
glass hatch ajar switch is open (not grounded) the BCM will control the rear wiper motor as follows.
The BCM controls rear wiper motor operation by switching direction of current flow between the two rear wiper
motor output circuits.
WKIA3401E

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REAR WIPER AND WASHER SYSTEM
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Power is supplied to output circuit 1 for forward operation (counterclockwise sweep),

through BCM terminal 55

to rear wiper motor terminal 4.
Ground is supplied

to rear wiper motor terminal 6

through BCM terminal 54

through BCM terminal 67

through grounds M57, M61 and M79.
With output circuit 1 power and ground supplied, the rear wiper motor operates in a counterclockwise sweep
direction until auto stop switch 1 closes (full sweep position [position B]). Auto stop switch 1 supplies ground

to BCM terminal 44

through rear wiper motor terminal 2

through rear wiper motor terminal 5

through grounds B117 and B132.
When the BCM receives this ground signal it turns off output circuit 1 and turns on output circuit 2.
Power is supplied to output circuit 2 for reverse operation (clockwise sweep),

through BCM terminal 54

to rear wiper motor terminal 6.
Ground is supplied

to rear wiper motor terminal 4

through BCM terminal 55

through BCM terminal 67

through grounds M57, M61 and M79.
With output circuit 2 power and ground supplied the rear wiper motor operates in a clockwise sweep direction
until auto stop switch 2 closes (full sweep position [position A]). Auto stop switch 2 supplies ground

to BCM terminal 26

through rear wiper motor terminal 1

through rear wiper motor terminal 3

through grounds B117 and B132.
When the BCM receives this ground signal it turns off output circuit 2 and turns on output circuit 1. This pro-
cess repeats until the rear wiper switch or ignition switch is turned off.
If the ignition switch is turned to OFF during operation, the rear wiper motor will immediately stop. If the igni-
tion switch is turned ON after this condition, and the BCM does not receive a rear wiper switch ON or INT sig-
nal, the BCM will operate the rear wiper to the auto stop position.
If the BCM does not receive a change in status in either auto stop switch 1 or auto stop switch 2 within a 5 sec-
ond period of output circuit 1 or output circuit 2 operation, the BCM will turn off output circuit 1 and output cir-
cuit 2.
If the BCM detects the glass hatch ajar switch signal during rear wiper motor operation, the BCM will operate
the rear wiper motor to the auto stop position. Once the glass hatch ajar switch signal returns to open (not
grounded) for 5 or more seconds, the BCM will resume rear wiper motor operation.
INTERMITTENT OPERATION
The rear wiper motor operates the wiper arm at low speed approximately every 7 seconds.
When the wiper switch is in the rear wiper INT position, the BCM detects a rear wiper INT request through the
combination switch (wiper switch) reading function.
The BCM controls rear wiper motor operation by switching direction of current flow between the two rear wiper
motor output circuits.
Power is supplied to output circuit 1 for forward operation (counterclockwise sweep),

through BCM terminal 55

to rear wiper motor terminal 4.
Ground is supplied

to rear wiper motor terminal 6

through BCM terminal 54

REAR WIPER AND WASHER SYSTEM
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through BCM terminal 67

through grounds M57, M61 and M79.
With output circuit 1 power and ground supplied, the rear wiper motor operates in a counterclockwise sweep
direction until auto stop switch 1 closes (full sweep position). Auto stop switch 1 supplies ground

to BCM terminal 44

through rear wiper motor terminal 2

through rear wiper motor terminal 5

through grounds B117 and B132.
When the BCM receives this ground signal it turns off output circuit 1 and turns on output circuit 2.
Power is supplied to output circuit 2 for reverse operation (clockwise sweep),

through BCM terminal 54

to rear wiper motor terminal 6.
Ground is supplied

to rear wiper motor terminal 4

through BCM terminal 55

through BCM terminal 67

through grounds M57, M61 and M79.
With output circuit 2 power and ground supplied the rear wiper motor operates in a clockwise sweep direction
until auto stop switch 2 closes (full sweep position). Auto stop switch 2 supplies ground

to BCM terminal 26

through rear wiper motor terminal 1

through rear wiper motor terminal 3

through grounds B117 and B132.
When the BCM receives this ground signal it turns off output circuit 2 and starts the timing function of 7 sec-
onds. After approximately 7 seconds the BCM turns on output circuit 1. This process repeats until the rear
wiper switch or ignition switch is turned off.
AUTO STOP OPERATION
When the rear wiper switch is turned off, the BCM will continue the cycle of output circuit 1 or output circuit 2
until auto stop switch 1 and auto stop switch 2 are both in the closed position. When the BCM receives ground
signals from auto stop switch 1 and auto stop switch 2 simultaneously, output circuit 1 and output circuit 2 are
both turned off.
REAR WASHER OPERATION
When the ignition switch is in the ON or START position, and the front and rear washer switches are OFF, the
front and rear washer motor is supplied power

through 10A fuse [No. 9, located in the fuse block (J/B)]

through combination switch (wiper switch) terminal 14

through combination switch (wiper switch) terminal 11

to front and rear washer motor terminal 2, and

through combination switch (wiper switch) terminal 13

to front and rear washer motor terminal 1.
When the rear wiper switch is in rear washer position, the BCM detects a rear washer signal by BCM wiper
switch reading function. Combination switch ground is supplied

to front and rear washer motor terminal 1

through combination switch (wiper switch) terminal 13

through combination switch (wiper switch) terminal 12

through grounds M57, M61 and M79.
With ground supplied, the front and rear washer motor is operated in the rear direction.
When the BCM detects that the rear washer motor has operated for 0.4 seconds or longer, BCM operates the
rear wiper motor.
When the BCM detects that the rear washer switch is in OFF, the rear wiper motor cycles approximately 3
times and then stops.

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REAR WIPER AND WASHER SYSTEM
Revision: August 20072004 QX56
If the rear washer is operated with the rear wiper switch in the INT position, normal rear wiper operation will
take over. Once the rear washer switch is released the rear wiper will return to INT operation.
BCM WIPER SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION" .

REAR WIPER AND WASHER SYSTEM
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Wiring Diagram — WIP/R —EKS007FQ
WKWA1264E