2004 INFINITI QX56 Revers

REMOVAL AND INSTALLATION
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REMOVAL AND INSTALLATIONPFP:00000
RemovalEDS0018V
1. Remove A/T undercover using power tools.
2. Remove center exhaust tube and muffler. Refer to EX-3, "
EXHAUST SYSTEM" .
3. Remove front and rear propeller shafts. Refer to PR-5, "
REMOVAL" (front) and PR-9, "REMOVAL"
(rear).
CAUTION:
Be careful not to damage spline, sleeve yoke and rear oil seal when removing the rear propeller
shaft
NOTE:
Insert a plug into rear oil seal after removing rear propeller shaft.
4. Remove A/T mount bolts. Refer to AT-255, "
TRANSMISSION ASSEMBLY" .
5. Position two suitable jacks under A/T and transfer assembly.
6. Remove crossmember. Refer to TF-109, "
REMOVAL AND INSTALLATION" .
WAR NIN G:
Support A/T and transfer assembly using two suitable jacks while removing crossmember.
7. Disconnect the ATP switch, neutral 4LO switch, wait detection switch, transfer motor and transfer control
device electrical connectors.
8. Remove breather hoses from the actuator, transfer rear case and transfer motor.
9. Remove the shift actuator from the extension housing.
10. Remove transfer to A/T bolts.
WAR NIN G:
Support transfer assembly with suitable jack while removing it.
11. Remove transfer assembly.
InstallationEDS0018W
1. Installation is in the reverse order of removal.
Bolt length : 45 mm (1.77 in)
Transfer bolt torque : 36 N·m (3.7 kg-m, 26 ft-lb)
SMT872C

CENTER CASE
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8. Remove O-rings from each solenoid valve, switch and terminal body.
9. Place control valve with lower body facing up, remove two
mounting bolts, and then remove lower body and separator plate
from upper body.
CAUTION:
Be careful not to drop relief balls. Detach lower body care-
fully.
10. Make sure reverse balls, relief balls and relief springs, accumu-
lator pistons and valve springs are securely installed as shown,
and remove them.
11. Remove retainer plates.
12. Remove each plug (2), control valve (3) and spring (4) from the
upper body (5).
SDIA2125E
SDIA2126E
SDIA2127E
WDIA0284E

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CENTER CASE
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CONTROL VALVE
1. Clean upper body, control valves and springs with cleaning agent, and dry with compressed air.
2. Dip control valves in ATF, and apply ATF to the valve-mounting area of upper body.
3. Install each control valve (3), spring (4) and plug (2) to upper
body (5), and install retainer plates (1) to hold them in place.
CAUTION:

To insert control valves into upper body, place upper
body on a level surface in order to prevent flaw or dam-
age.

Make sure each control valve is smoothly inserted.
4. Install reverse balls, relief balls and relief springs, accumulator
pistons and valve springs to upper body.
5. Install lower body and separator plate to upper body.
NOTE:
Do not reuse separator plates.
WDIA0284E
SDIA2127E
SDIA2126E
SDIA2125E

TF-152
ASSEMBLY
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15. Install air breather into rear case.
16. Apply specified Anaerobic Liquid Gasket or equivalent to entire
rear case mounting surface of center case as shown. Refer to
GI-45, "
Recommended Chemical Products and Sealants" .
CAUTION:
Be careful not to allow Liquid Gasket to the stem bleeder
hole.
NOTE:
Remove all foreign materials such as water, oil, and grease from
center case and rear case mating surfaces.
17. Install rear case to center case, and tighten bolts to specified
torque.
18. Installation of the remaining components is in the reverse order of removal.
SDIA2206E
Center case bolts : 45 N·m 4.6 kg-m, 33 ft-lb)
SDIA2100E

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

WW-32
FRONT WIPER AND WASHER SYSTEM
Revision: August 20072004 QX56
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

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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.