2005 INFINITI QX4 check transmission fluid

TRANSMISSION ASSEMBLY
AT-249
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Revision: October 20052005 QX56
INSTALLATION
Installation of the remaining components is in the reverse order of removal, while paying attention to the fol-
lowing:

When installing transmission to the engine, attach the bolts as shown.
NOTE:
*: No.2 bolt also secures air breather vent.

Align the positions of bolts for drive plate with those of the torque
converter, and temporarily tighten the bolts. Then, tighten the
bolts with the specified torque, using Tool to secure drive plate.
CAUTION:

When turning crankshaft, turn it clockwise as viewed from
the front of the engine.

After converter is installed to drive plate, rotate crankshaft
several turns and check to be sure that transmission
rotates freely without binding.

Install crankshaft position sensor (POS).

After completing installation, check fluid leakage, fluid level, and the positions of A/T. Refer to MA-22,
"Checking A/T Fluid" , AT-228, "Checking of A/T Position" , AT- 2 2 8 , "Adjustment of A/T Position" . Transmission to engine
bolts: 113 N·m (12 kg-m, 83 ft-lb)
LCIA0371E
Tool number : — (J-47245)
LCIA0335E

EM-72Revision: October 2005
ENGINE ASSEMBLY
2005 QX56
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:

When replacing an engine or transmission you must make sure the dowels are installed correctly
during re-assembly.

Improper alignment caused by missing dowels may cause vibration, oil leaks or breakage of driv-
etrain components.
INSPECTION AFTER INSTALLATION

Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are
lower than required quantity, fill to the specified level. Refer to MA-11, "
RECOMMENDED FLUIDS AND
LUBRICANTS" .

Use procedure below to check for fuel leakage.

Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel
leakage at the connection points.

Start engine. With engine speed increased, check again for fuel leakage at connection points.

Run engine to check for unusual noise and vibration.

Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids includ-
ing engine oil and engine coolant.

Bleed air from passages in lines and hoses, such as in cooling system.

After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary.

Summary of the inspection items:
*Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluids* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gas — Leakage —

IDX-2
ALPHABETICAL INDEX
Numerics
2-4WD shift solenoid valve ..... TF-94
, TF-152, TF-165
4WD - Wiring diagram ....................................... TF-24
4WD shift switch ................................................ TF-66
4WD solenoid valve ................ TF-90, TF-152, TF-165
4WD system description .................................... TF-15
4WD system diagram ........................................ TF-19
A
A/C air flow ...................................................... ATC-29
A/C compressor clutch removal and installation .. ATC-
180
A/C compressor mounting ............................. ATC-179
A/C compressor precaution ............................. ATC-11
A/C compressor special service tool ................ ATC-14
A/C control operation (auto A/C) ...................... ATC-26
A/C diagnostic work flow (auto A/C) .............. ATC-132
A/C evaporator ............................................... ATC-186
A/C HFC134a (R134a) system identification ..... ATC-7
A/C HFC134a (R134a) system precaution ........ ATC-5
A/C HFC134a (R134a) system service procedure ATC-
175
A/C HFC134a (R134a) system service tools ... ATC-14
A/C HFC134a system service equipment precaution ...
ATC-11
A/C lubricant (R134a) ...................................... ATC-22
A/C lubrication oil ............................................. ATC-22
A/C operational check ....................... ATC-57, ATC-60
A/C self-diagnoses (auto A/C) ........ ATC-55, ATC-132
A/C service data specification ........................ ATC-193
A/C trouble diagnoses (auto A/C) .................... ATC-33
A/C, A - Wiring diagram ................................... ATC-43
A/T fluid checking ...................... AT-13, AT-50, MA-22
A/T fluid cooler cleaning .................................... AT-13
A/T fluid replacement ............................. AT-13, MA-24
A/T fluid temperature sensor ........................... AT-126
A/T IND - Wiring diagram .................................... DI-40
A/T indicator ........................................................ DI-40
A/T shift lock system ........................................ AT-222
A/T trouble diagnoses ........................................ AT-41
A/T Wiring diagram AT - CAN ............................ AT-96
A/T Wiring diagram AT - FTS .......................... AT-127
A/T Wiring diagram AT - MAIN ........................ AT-168
A/T Wiring diagram AT - NONDTC .................. AT-177
A/T Wiring diagram AT - PNP/SW ................... AT-105
A/T Wiring diagram AT - STSIG ...................... AT-100
A/T Wiring diagram AT - VSS A/T ................... AT-110
ABS - Wiring diagram ..................................... BRC-16
ABS (anti-lock brake system) ........................... BRC-7
Accelerator control system ............................... ACC-2
Accelerator pedal position (APP) sensor . EC-591, EC-
597, EC-611
Accelerator pedal released position learning ..... EC-90
AF1B1-Wiring diagram EC-461, EC-470, EC-479, EC-
489, EC-500, EC-510, EC-522
AF1B2-Wiring diagram EC-463, EC-472, EC-481, EC-
491, EC-502, EC-512, EC-524
AF1HB1-Wiring diagram ................................. EC-387
AF1HB2-Wiring diagram ................................. EC-389
Aiming adjustment .................................. LT-30, LT-78
Air bag ............................................................... SRS-3
Air cleaner and air duct ..................................... EM-14
Air cleaner filter replacement ............................ MA-16
Air conditioner cut control ................................. EC-28
Air flow meter - See Mass air flow sensor EC-174, EC-
183
Air fuel ratio sensor 1 .. EC-459, EC-468, EC-477, EC-
487, EC-497, EC-507, EC-519
Air fuel ratio sensor 1 heater ........................... EC-386
Air mix. door motor .......................................... ATC-70
Ambient sensor ............................. ATC-137, ATC-148
Angular tightening application ............................. EM-3
APPS1 - Wiring diagram ................................. EC-593
APPS2 - Wiring diagram ................................. EC-599
APPS3 - Wiring diagram ................................. EC-613
ASC/BS - Wiring diagram ............................... EC-571
ASC/SW - Wiring diagram .............................. EC-554
ASCBOF - Wiring diagram .............................. EC-658
ASCD ................................................................ EC-29
ASCD (automatic speed control device) ........... ACS-3
ASCD brake switch ........................... EC-569, EC-657
ASCD indicator lamp ....................................... EC-664
ASCD steering switch ..................................... EC-552
ASCIND - Wiring diagram ............................... EC-665
ATP switch ............................ TF-107, TF-110, TF-115
AUDIO - Wiring diagram .................................... AV-10
AUT/DP - Wiring diagram .................................. SE-20
Auto air conditioner - Wiring diagram .............. ATC-43
Auto anti-dazzling inside mirror ........... GW-75, GW-76
Autolamp ............................................................ LT-47
Automatic amplifier ......................................... ATC-61
Automatic drive positioner .................................. SE-11
Automatic transmission number .......................... GI-48
AV and NAVI control unit ................................... AV-63
AV communication line ...................................... AV-87
B
Back door ........................................................... BL-99
Back door trim ..................................................... EI-32
Back sonar .......................................................... DI-58
BACK/L - Wiring diagram ................................. LT-106
Back-up lamp ................................................... LT-106
Ball joint (front) ................................................ FSU-15
Basic inspection ................................................ EC-72
Battery ................................................................. SC-4
Battery/Starting/Charging System Tester SC-6, SC-12,
SC-19
BCM (Body control module) .............................. BCS-3
Block heater ...................................................... EM-73
Blower motor ................................... ATC-93, ATC-152
Body alignment ................................................ BL-172
Body component parts ..................................... BL-161
Body construction ............................................ BL-171
Body exterior paint color .................................. BL-160
Body mounting ................................................. BL-159

MA-22
CHASSIS AND BODY MAINTENANCE
Revision: October 20052005 QX56
6. Install the lower glove box in the instrument panel and secure it
with the two hinge pins.
Checking Exhaust SystemELS001BZ
Check exhaust pipes, muffler and mounting for improper attachment,
leaks, cracks, damage, loose connections, chafing or deterioration.
Checking A/T FluidELS001C0
1. Warm up the engine.
2. Check for any fluid leaks.
3. Remove the tightening bolt for the ATF level gauge.
4. Before driving, the fluid level can be checked at fluid tempera-
tures of 30° to 50°C (86° to 122°F) using the “COLD” range on
the ATF level gauge as follows:
a. Park the vehicle on a level surface and set the parking brake.
b. Start the engine and move the selector lever through each gear
position. Shift the selector lever into the “P” position.
c. Check the fluid level with the engine idling.
d. Remove the ATF level gauge and wipe it clean with a lint-free
paper.
CAUTION:
When wiping the fluid from the ATF level gauge, always use
a lint-free paper, not a cloth.
e. Re-insert the ATF level gauge into the charging pipe until the
cap contacts the top of the charging pipe as shown.
CAUTION:
To check fluid level, insert the ATF level gauge until the cap
contacts the top of the charging pipe, with the gauge
reversed from the normal inserted position.
f. Remove the ATF level gauge and note the fluid level. If the fluid
level is at low side of range, add fluid to the transmission
through the charging pipe.
CAUTION:
Do not overfill the transmission with fluid.
5. Drive vehicle for approximately 5 minutes in urban areas.
WLIA0027E
SM A211 A
WLIA0014E
SCIA1684E

CHASSIS AND BODY MAINTENANCE
MA-23
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Revision: October 20052005 QX56
6. Drive the vehicle for at least five minutes or until the fluid temperature reaches approximately 65°C
(149°F).Use the CONSULT-II to monitor the fluid temperature as follows:
NOTE:
Fluid level will be greatly affected by temperature as shown. Therefore monitor the fluid temperature data
using the CONSULT-II.
a. Connect CONSULT-II to data link connector.
b. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
c. Read out the value of “ATF TEMP 1”.
7. Re-check the fluid level at fluid temperatures of approximately
65°C (149°F) using the “HOT” range on the A/T fluid level gauge
as shown.
CAUTION:

When wiping the fluid from the ATF level gauge, always
use lint-free paper, not a cloth.

To check the fluid level, insert the ATF level gauge until
the cap contacts the top of the charging pipe, with the
gauge reversed from the normal inserted position as
shown.
8. Check the fluid condition.

If the fluid is very dark or smells burned, there may be an
internal problem with the transmission. Refer to AT - 4 1 ,
"TROUBLE DIAGNOSIS" . Flush the transmission cooling
system after repairing the transmission.

If the ATF contains frictional material (clutches, bands, etc.),
replace the radiator and flush the transmission cooler lines
using cleaning solvent and compressed air after repairing the
transmission.
9. Install the ATF level gauge in the fluid charging pipe and install the level gauge bolt. Tighten the level
gauge bolt to specification.
SLIA0016E
WLIA0014E
Level gauge bolt : Refer to AT-250, "Components" .
SCIA1684E

MA-24
CHASSIS AND BODY MAINTENANCE
Revision: October 20052005 QX56
Changing A/T FluidELS001C1
1. Run the engine to warm up the ATF.
2. Stop the engine.
3. Remove the bolt for the ATF level gauge.
4. Drain the ATF from the drain plug hole and refill the transmission
with new ATF. Always refill same volume with drained fluid and
use the dipstick to check the fluid level as shown. Add fluid as
necessary.

To flush out the old fluid from the coolers, pour new fluid into the charging pipe with the engine idling
and at the same time drain the old fluid from the auxiliary transmission oil cooler hose return line.

When the color of the fluid coming out of the auxiliary transmission oil cooler hose return line is about
the same as the color of the new fluid, flushing out the old fluid is complete. The amount of new trans-
mission fluid used for flushing should be 30% to 50% of the specified capacity.
CAUTION:

Use only Genuine NISSAN ATF Matic Fluid J. Do not mix with other fluid.

Using automatic transmission fluid other than Genuine NISSAN ATF Matic Fluid J will cause
deterioration in driveability and automatic transmission durability, and may damage the auto-
matic transmission, which is not covered by the warranty.

When filling the transmission with fluid, do not spill the ATF on any heat generating parts such
as the exhaust manifold.
5. Check the fluid level and condition. Refer to MA-22, "
Checking A/T Fluid" . If the fluid is still dirty, repeat
steps 2 through 5.
6. Install the ATF level gauge in the fluid charging pipe and install the level gauge bolt. Tighten the level
gauge bolt to specification.
Changing Transfer FluidELS001H0
DRAINING
1. Stop the engine.
2. Remove the drain plug and gasket to drain the transfer fluid as
shown.
3. Install the new gasket on the drain plug and install the drain plug
in the transfer. Tighten the drain plug to specification.
CAUTION:
Do not reuse the gasket.
WLIA0014E
Transmission fluid type and capacity : Refer to MA-11, "Fluids and Lubricants" .
Drain plug : Refer to AT-250, "
Components" .
Level gauge bolt : Refer to AT-250, "
Components" .
Drain plug : Refer to TF-144, "
COMPONENTS" .
SM A44 4B

TF-18
ALL-MODE 4WD SYSTEM
Revision: October 20052005 QX56
LINE PRESSURE SWITCH

With the transfer system design, control of the oil pressure provides the transmission of drive torque to the
front wheels. The main pressure to control the oil pressure is referred to as the line pressure.

The line pressure switch determines whether or not adequate line pressure has built up under different
operating conditions.

The line pressure switch turns ON when line pressure is produced.

The line pressure switch senses line pressure abnormalities and turns the 4WD warning lamp ON.
CLUTCH PRESSURE SWITCH

The clutch pressure switch determines whether or not adequate clutch pressure has built up under differ-
ent operating conditions.

The clutch pressure switch turns ON when clutch pressure is produced.

The clutch pressure switch senses clutch pressure abnormalities and turns the 4WD warning lamp ON.
TRANSFER FLUID TEMPERATURE SENSOR
The transfer temperature sensor detects the transfer fluid temperature and sends a signal to the transfer con-
trol unit.
TRANSFER CONTROL UNIT

Transfer control unit controls transfer control device by input signals of each sensor and each switch.

Self-diagnosis can be done.
TRANSFER CONTROL DEVICE
The transfer control device changes the state of transfer assembly between 2WD, AUTO, 4H⇔4LO with the
2WD, AUTO, 4H and 4LO signals of 4WD shift switch.
NOTE:

To shift between 4H⇔4LO, stop the vehicle, depress the brake pedal and shift the transmission selector
to the "N" position. Depress and turn the 4WD shift switch. The shift switch will not shift to the desired
mode if the transmission is not in "N" or the vehicle is moving. The 4LO indicator lamp will be lit when the
4LO is engaged.

Actuator motor and actuator position switch are integrated.
4WD SHIFT SWITCH AND INDICATOR LAMP
4WD Shift Switch
The 4WD shift switch allows selection from 2WD, AUTO, 4H or 4LO.
4WD Shift Indicator Lamp

Displays driving conditions selected by 4WD shift switch with 2WD, AUTO and 4H indicators while engine
is running. (When 4WD warning lamp is turned on, all 4WD shift indicator lamps are turned off.)

Turns ON for approximately 1 second when ignition switch is turned ON, for purpose of lamp check.
4LO Indicator Lamp

Displays 4LO condition while engine is running. 4LO indicator lamp flashes if transfer gear does not shift
completely under 2WD, AUTO, 4H⇔4LO. (When 4WD warning lamp is turned on, 4LO indicator lamp is
turned off.)

Turns ON for approximately 1 second when ignition switch is turned ON, for purpose of lamp check.