engine coolant INFINITI QX4 2005 Factory Service Manual

IDX-4
ALPHABETICAL INDEX
Drive chain (Transfer) ......................... TF-147, TF-174
Drive pinion diff. inspection ............................. RFD-13
Drive pinion height .......................................... RFD-18
Drive shaft (rear) ............................................... RAX-7
Driver air bag .................................................. SRS-46
DTC work support ............................................ EC-136
DTRL - Wiring diagram ....................................... LT-37
Duct and grilles .............................................. ATC-170
DVD Player ........................................................ AV-60
E
ECM input/output signal ..................... EC-117
, EC-141
ECM power supply ............................. EC-157, EC-393
ECM relay ........................................................ EC-157
ECM/PW - Wiring diagram ............................... EC-394
ECTS - Wiring diagram .................................... EC-197
Electric sunroof .................................................. RF-10
Electric throttle control actuator ......... EC-397, EC-399
Electrical load signal circuit .............................. EC-648
Electrical units location ...................................... PG-63
Electronic ignition (EI) system ........................... EC-26
Engine control circuit diagram ......................... EC-115
Engine control component parts location ......... EC-108
Engine control module (ECM) .......................... EC-383
Engine control system diagram ......................... EC-23
Engine coolant .................................................. CO-10
Engine coolant temperature sensor (ECTS) ... EC-195,
EC-208
Engine fail-safe system .................................... EC-103
Engine oil ............................................................. LU-7
Engine oil filter replacement ............................. MA-17
Engine oil precautions .......................................... GI-7
Engine oil replacement ..................................... MA-17
Engine removal ................................................. EM-69
Engine room cover ............................................ EM-11
Engine serial number .......................................... GI-48
ETC1 - Wiring diagram .................................... EC-400
ETC2 - Wiring diagram .................................... EC-407
ETC3 - Wiring diagram .................................... EC-411
EVAP canister .................................................... EC-35
EVAP canister purge volume control solenoid valve ....
EC-318
, EC-531
EVAP canister vent control valve ....... EC-325, EC-539
EVAP control system (small leak) diagnosis .. EC-309,
EC-349
, EC-357
EVAP control system pressure sensor .... EC-332, EC-
335, EC-341
EVAP control system purge flow monitoring diagnosis
EC-304
EVAP vapor lines inspection ............................. MA-20
Evaporative emission (EVAP) system ............... EC-32
Evaporator ..................................................... ATC-186
Exhaust manifold .............................................. EM-19
Exhaust system ................................................... EX-3
Exhaust system inspection .................................. EX-3
Expansion valve ............................................. ATC-188
F
F/FOG - Wiring diagram ..................................... LT-71
F/PUMP - Wiring diagram ............................... EC-638
Final drive pre-inspection .................. FFD-14, RFD-13
Final drive removal and installation ... FFD-11, RFD-10
Flow charts .......................................................... GI-27
Fluid temperature sensor (A/T) ........................ AT-126
Fluids ................................................................ MA-11
Fluorescent leak detector .............................. ATC-189
Fog lamp, front ................................................... LT-69
Foot lamp ......................................................... LT-130
Freeze frame data ............................... EC-54, EC-130
Front brake solenoid valve ................. AT-144, AT-146
Front bumper ...................................................... EI-13
Front case (Transfer) .......................... TF-147, TF-174
Front combination lamp removal and installation LT-32
Front door ............................. BL-128, BL-131, GW-68
Front Door Trim ................................................... EI-32
Front drive shaft (Transfer) ................. TF-147, TF-174
Front fog lamp .................................................... LT-69
Front passenger air bag .................................. SRS-51
Front seat ........................................................... SE-97
Front seat belt ...................................................... SB-3
Front seat belt pre-tensioner ............... SRS-3, SRS-58
Front washer ...................................................... WW-4
Front wiper ......................................................... WW-4
FTTS - Wiring diagram ...................... EC-255, EC-260
Fuel cut control (at no load high engine speed) EC-27
Fuel filter replacement ......................................... FL-5
Fuel gauge ............................................................ DI-5
Fuel injection system (Bank 1) .......... EC-236, EC-245
Fuel injection system (Bank 2) .......... EC-236, EC-245
Fuel injector and fuel tube ................................. EM-29
Fuel level sensor ................. EC-366, EC-368, EC-370
Fuel line inspection .............................................. FL-3
Fuel pressure check .......................................... EC-93
Fuel pressure release ....................................... EC-93
Fuel pump ....................................................... EC-637
Fuel pump and gauge .......................................... FL-5
Fuel system .......................................................... FL-3
Fuel tank .............................................................. FL-9
Fuel tank temperature sensor ........... EC-253, EC-259
Fuel tank vacuum relief valve ........................... EC-35
FUELB1 - Wiring diagram ................. EC-238, EC-247
FUELB2 - Wiring diagram ................. EC-239, EC-248
Fuse ...................................................... PG-66, PG-77
Fuse and fusible link box .................................. PG-77
Fuse block ......................................................... PG-76
Fusible link ............................................ PG-66, PG-77
G
Garage jack and safety stand ............................. GI-40
Gauges ................................................................. DI-5
Generator .......................................................... SC-17
Generic scan tool (GST) ................................. EC-139
Glass ...................................... GW-11, GW-68, GW-71
Glove box lamp ................................................ LT-153

LAN-6
[CAN]
CAN COMMUNICATION
Revision: October 20052005 QX56
Input/output signal chart
T: Transmit R: Receive
Signals ECM TCMDriver
seat
con-
trol
unitCom-
bina-
tion
meterDis-
play
con-
trol
unitBCMStee r-
ing
angle
sensorFront
air
control ABS
actua-
tor and
elec-
tric unit
(con-
trol
unit)IPDM
E/R
Engine speed signal T R R R R
Engine status signal T R R
Engine coolant temperature signal T R R R
A/T self-diagnosis signal R T
Accelerator pedal position signal T R R
Closed throttle position signal T R
Wide open throttle position signal T R
Battery voltage signal T R
Key switch signal R T
Ignition switch signal R T R
P range signal T R
Stop lamp switch signal R T
Parking brake switch signal T R
Fuel consumption monitor signalTR
TR
Turbine revolution signal R T
Output shaft revolution signal R T
A/C switch signal R T
A/C compressor request signal T R R
Blower fan motor switch signal R T R
A/C switch/indicator signalTR
RT
Cooling fan speed request signal T R R
Position light request signal R T R
Low beam request signal T R
Low beam status signal RT
High beam request signal R T R
High beam status signal RT
Front fog light request signal T R
Day time running light request signal T R
Vehicle speed signalRRT
RRRTRR R
Sleep wake up signal R T R
Door switch signal R R R T R
Turn indicator signal R T
Key fob ID signal R T
Key fob door unlock signal R T
Buzzer output signal R T

LAN-8
[CAN]
CAN COMMUNICATION
Revision: October 20052005 QX56
TYPE2
System diagram

Type2
Input/output signal chart
T: Transmit R: Receive
PKIA8134E
Signals ECM TCMICC
sen-
sorICC
unitDriver
seat
con-
trol
unitCom-
bina-
tion
mete
rDis-
play
con-
trol
unitBCMSteer-
ing
angle
sensorFront
air
con-
trol ABS
actu-
ator
and
elec-
tric
unit
(con-
trol
unit)IPD
M E/
R
Engine speed signal T R R R R R
Engine status signal T R R
Engine coolant temperature signal T R R R
A/T self-diagnosis signal R T
Accelerator pedal position signal T R R R
Closed throttle position signal T R R
Wide open throttle position signal T R
Battery voltage signal T R
Key switch signal R T
Ignition switch signal R T R
P range signal T R R
Stop lamp switch signal R T
Parking brake switch signal T R
Fuel consumption monitor signalTR
TR
Turbine revolution signal R T R
Output shaft revolution signal R T R
A/C switch signal R T
A/C compressor request signal T R R
Blower fan motor switch signal R T R

CAN COMMUNICATION
LAN-11
[CAN]
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MA
B
LAN
Revision: October 20052005 QX56
Input/output signal chart
T: Transmit R: Receive
Signals ECM TCMDriver
seat
con-
trol
unitCom-
bina-
tion
meterDis-
play
con-
trol
unitBCMStee r-
ing
angle
sen-
sorFront
air
con-
trolTran s-
fer
con-
trol
unitABS
actua-
tor
and
elec-
tric
unit
(con-
trol
unit)IPDM
E/R
A/T self-diagnosis signal R T
Stop lamp switch signal R T
Parking brake switch signal T R
Battery voltage signal T R
Key switch signal R T
Ignition switch signal R T R
P range signal T R
Closed throttle position signal T R
Wide open throttle position signal T R
Engine speed signal T R R R R R
Engine status signal T R R
Engine coolant temperature signal T R R R
Accelerator pedal position signal T R R R
Fuel consumption monitor signalTR
TR
Turbine revolution signal R T
Output shaft revolution signal R T R
A/C switch signal R T
A/C compressor request signal T R R
Blower fan motor switch signal R T R
A/C switch/indicator signalTR
RT
Cooling fan speed request signal T R R
Position light request signal R T R
Low beam request signal T R
Low beam status signal RT
High beam request signal R T R
High beam status signal RT
Front fog light request signal T R
Day time running light request signal T R
Vehicle speed signalRRRT
RRRT RR R
Sleep wake up signal R T R
Door switch signal R R R T R
Turn indicator signal R T
Key fob ID signal R T
Key fob door unlock signal R T

CAN COMMUNICATION
LAN-13
[CAN]
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B
LAN
Revision: October 20052005 QX56
TYPE 4
System diagram

Ty p e 4
Input/output signal chart
T: Transmit R: Receive
PKIA8135E
Signals ECM TCMICC
sen-
sorICC
unitDriver
seat
con-
trol
unitCom-
bina-
tion
mete
rDis-
play
con-
trol
unitBCMStee r-
ing
angle
sen-
sorFront
air
con-
trolTra ns -
fer
con-
trol
unitABS
actu-
ator
and
elec-
tric
unit
(con-
trol
unit)IPD
M
E/R
A/T self-diagnosis signal R T
Stop lamp switch signal R T
Parking brake switch signal T R
Battery voltage signal T R
Key switch signal R T
Ignition switch signal R T R
P range signal T R R
Closed throttle position signal T R R
Wide open throttle position signal T R
Engine speed signal T R R R R R R
Engine status signal T R R
Engine coolant temperature sig-
nalTR R R
Accelerator pedal position signal T R R R R
Fuel consumption monitor signalTR
TR
Turbine revolution signal R T R
Output shaft revolution signal R T R R
A/C switch signal R T
A/C compressor request signal T R R
Blower fan motor switch signal R T R

LT-30
HEADLAMP (FOR USA)
Revision: October 20052005 QX56
Aiming AdjustmentEKS00B89
For details, refer to the regulations in your state.
Before performing aiming adjustment, check the following.
1. Ensure all tires are inflated to correct pressure.
2. Place vehicle and screen on level surface.
3. Ensure there is no load in vehicle other than the driver (or equivalent weight placed in driver's position).
Coolant and engine oil filled to correct level, and fuel tank full.
4. Confirm spare tire, jack and tools are properly stowed.
5. If equipped, confirm headlamp aiming switch is set to "0" (zero) position.
LOW BEAM AND HIGH BEAM
NOTE:
Aim each headlamp individually and ensure other headlamp beam pattern is blocked from screen.
1. Turn headlamp low beam on.
2. Use adjusting screw to perform aiming adjustment.
WKIA1859E

LT-78
FRONT FOG LAMP
Revision: October 20052005 QX56
Aiming AdjustmentEKS00B9M
The fog lamp is a semi-sealed beam type which uses a replaceable halogen bulb. Before performing aiming
adjustment, make sure of the following.

Keep all tires inflated to correct pressure.

Place vehicle on level ground.

See that vehicle is unloaded (except for full levels of coolant,
engine oil and fuel, and spare tire, jack, and tools). Have the
driver or equivalent weight placed in driver seat.
Adjust aiming in the vertical direction by turning the adjustment
screw.
NOTE:
Access adjustment screw from underneath front bumper. Turn screw
clockwise to raise pattern and counterclockwise to lower pattern.
1. Set the distance between the screen and the center of the fog
lamp lens as shown.
2. Turn front fog lamps ON.
3. Adjust front fog lamps using adjusting screw so that the top edge
of the high intensity zone is 200 mm (7.9 in) below the height of
the fog lamp centers as shown.

When performing adjustment, if necessary, cover the headlamps
and opposite fog lamp.
SEL350X
MEL327G
MEL328GA

LU-2Revision: October 2005
PRECAUTIONS
2005 QX56
PRECAUTIONSPFP:00001
Precautions for Liquid GasketEBS00NIH
REMOVAL OF LIQUID GASKET SEALING

After removing the bolts and nuts, separate the mating surface
and remove the old liquid gasket sealing using Tool.
CAUTION:
Do not damage the mating surfaces.

Tap the seal cutter to insert it.

In areas where the Tool is difficult to use, lightly tap to slide it.
LIQUID GASKET APPLICATION PROCEDURE
1. Remove the old liquid gasket adhering to the gasket application
surface and the mating surface using suitable tool.

Remove the liquid gasket completely from the groove of the
liquid gasket application surface, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove adhering
moisture, grease and foreign material.
3. Attach the liquid gasket tube to the Tool.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-45, "
Recommended Chemical Products and Sealants" .
4. Apply the liquid gasket without breaks to the specified location
with the specified dimensions.

If there is a groove for the liquid gasket application, apply the
liquid gasket to the groove.

As for the bolt holes, normally apply the liquid gasket inside
the holes. If specified in the procedure, it should also be
applied outside the holes.

Within five minutes of liquid gasket application, install the mat-
ing component.

If the liquid gasket protrudes, wipe it off immediately.

Do not retighten after the installation.

Wait 30 minutes or more after installation before refilling the
engine with engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe them.Too l n u mb er : K V 1011110 0 (J -37228)
WBIA0566E
PBIC0003E
Tool number : WS39930000 ( — )
WBIA0567E
SEM 15 9F

ENGINE OIL
LU-7
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LU
Revision: October 20052005 QX56
ENGINE OILPFP:KLA92
InspectionEBS00LMS
OIL LEVEL

Before starting the engine make sure the vehicle is parked on a
flat and level surface, then check the oil level. If the engine is
already running, turn it off and allow 10 minutes before check-
ing.

Check that the oil level is within the low (L) and high (H) range
as indicated on the dipstick.

If the engine oil level is out of range, add oil as necessary. Refer
to GI-45, "
Recommended Chemical Products and Sealants" .
OIL APPEARANCE

Check the engine oil for a white milky appearance or excessive contamination.

If the engine oil is milky, it is highly probable that it is contaminated with engine coolant. Repair the broken
parts.
OIL LEAKAGE
Check for oil leakage around the following areas:

Oil pan

Oil pan drain plug

Oil pressure sensor

Oil filter

Oil cooler

Intake valve timing control cover

Intake valve timing control solenoid valve

Front cover

Mating surface between cylinder block and cylinder head

Mating surface between cylinder head and rocker cover

Crankshaft oil seal (front and rear)
OIL PRESSURE CHECK
WA RN ING:

Be careful not to burn yourself, as engine oil may be hot.

Put the selector lever in the Park “P” position.
1. Check the engine oil level. Refer to LU-7, "
OIL LEVEL" .
2. Remove engine front undercover using power tool.
3. Disconnect the oil pressure sensor harness connector.
4. Remove the oil pressure sensor.
SM A95 4C
WBIA0538E

OIL COOLER
LU-11
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Revision: October 20052005 QX56
OIL COOLERPFP:21305
Removal and InstallationEBS00LMV
WA RN ING:
Be careful not to burn yourself, as the engine oil and engine coolant are hot.
REMOVAL
1. Remove engine front undercover using power tool.
2. Disconnect water hoses, pinching hoses near oil cooler to prevent engine coolant from spilling.
CAUTION:
Do not spill engine coolant on the drive belt.
3. Remove oil filter. Refer to LU-10, "
Removal and Installation" .
CAUTION:
Do not spill engine oil on the drive belts.
4. Remove connector bolt, and remove oil cooler.
INSPECTION AFTER REMOVAL
Oil Cooler
Check oil cooler for cracks. Check oil cooler for clogging by blowing compressed air through engine coolant
inlet. If necessary, replace oil cooler assembly.
Relief Valve
Inspect relief valve for movement, cracks and breaks by pushing the ball. If replacement is necessary, remove
valve by prying it out using a suitable tool. Install a new valve in place by tapping it.
WBIA0414E
1. Oil pan 2. Water hose 3. Water pipe
4. Water hose 5. Oil cooler bolt 6. Oil filter
7. Oil cooler 8. O-ring 9. Relief valve
10. Water hose 11. Connector pipe 12. Gasket