width INFINITI QX4 2005 Factory User Guide

EC-146Revision: October 2005
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
2005 QX56
TROUBLE DIAGNOSIS - SPECIFICATION VALUEPFP:00031
DescriptionUBS00L0F
The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI-
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items:

B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)

A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)

MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Testing ConditionUBS00L0G

Vehicle driven distance: More than 5,000 km (3,017 miles)

Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm2 , 14.25 - 15.12 psi)

Atmospheric temperature: 20 - 30°C (68 - 86°F)

Engine coolant temperature: 75 - 95°C (167 - 203°F)

Transmission: Warmed-up*1

Electrical load: Not applied*2

Engine speed: Idle
*1: After the engine is warmed up to normal operating temperature, drive vehicle until “ATF TEMP SE 1” (A/T
fluid temperature sensor signal) indicates more than 60°C (140°F).
*2: Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.
Inspection ProcedureUBS00L0H
NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1. Perform EC-72, "
Basic Inspection" .
2. Confirm that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2”
and “MAS A/F SE-B1” in “DATA MONITOR (SPEC)” mode with
CONSULT-II.
4. Make sure that monitor items are within the SP value.
5. If NG, go to EC-147, "
Diagnostic Procedure" .
SEF 6 01 Z

INTAKE MANIFOLD
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INSTALLATION
Installation is in the reverse order of removal.

Tighten the intake manifold bolts in numerical order as shown.

Install the EVAP canister purge control solenoid valve connector with it facing front of engine.

Tighten the electronic throttle control actuator bolts of the electric throttle control actuator equally and
diagonally in several steps.

After installation perform procedure in EM-18, "INSPECTION AFTER INSTALLATION" .

Install the water hose so that its overlap width for connection is between 27 mm (1.06 in) and 32 mm (1.26
in) (target: 27 mm 1.06 in).
Connecting Quick Connector of Fuel Tube
Install quick connector as follows (the steps are the same for quick connectors on both engine side and vehi-
cle side except for the quick connector cap).
1. Make sure no foreign substances are deposited in and around tube and quick connector, and they are not
damaged.
2. Thinly apply new engine oil around the fuel tube from tip end to the spool end.
3. Align center to insert quick connector straight into fuel tube.

Insert until the paint mark for engagement identification
(white) goes completely inside quick connector so that you
cannot see it from the straight side of the connected part. Use
a mirror to check this where it is not possible to view directly
from the straight side, such as quick connector on vehicle
side.

Insert fuel tube into quick connector until top spool is com-
pletely inside quick connector, and 2nd level spool exposes
right below quick connector on engine side.
CAUTION:

Hold "A" position in illustration when inserting fuel
tube into quick connector.

Carefully align center to avoid inclined insertion to pre-
vent damage to O-ring inside quick connector.

Insert until you hear a “click” sound and actually feel
the engagement.

To avoid misidentification of engagement with a similar
sound, be sure to perform the next step.
4. Pull quick connector by hand holding "A" position. Make sure it is completely engaged (connected) so that
it does not come out from fuel tube.
NOTE:
Recommended pulling force is 50 N (5.1 kg, 11.2 lb).
KBIA2462E
PBIC0017E
KBIA0272E

EM-96Revision: October 2005
CYLINDER BLOCK
2005 QX56
Measure inside diameter of connecting rod bearing.
(Oil clearance) = (Inside diameter of connecting rod bearing) –
(Crankshaft pin diameter)

If clearance cannot be adjusted within the standard, grind crank-
shaft pin and use undersized bearing. Refer to EM-85, "
HOW
TO SELECT MAIN BEARING" .
Method of Using Plastigage

Remove oil and dust on the crankshaft pin and surfaces of each
bearing completely.

Cut a plastigage slightly shorter than the bearing width, and
place it in the crankshaft axial direction, avoiding oil holes.

Install the connecting rod bearings to the connecting rod and
connecting rod bearing cap, and tighten the connecting rod bolts
to the specified torque.
CAUTION:
Do not rotate crankshaft with plastigage installed.

Remove the connecting rod bearing cap and bearings. Measure
the platigage width using the scale on the plastigage bag.
NOTE:
The procedure when the measured value exceeds the repair limit is the same as that described in
“Method of Measurement.”
MAIN BEARING OIL CLEARANCE
Method of Measurement

Install the main bearings to the cylinder block and main bearing
cap. Measure the main bearing inside diameter with the bearing
cap bolt tightened to the specified torque. Refer to EM-77,
"ASSEMBLY" .
(Oil clearance) = (Inside diameter of main bearing) – (Crank-
shaft journal diameter)

If measured value exceeds the repair limit, select main bearings referring to the main bearing inside diam-
eter and crankshaft journal diameter, so that the oil clearance satisfies the standard. Refer to EM-85
. Standard : 0.020 - 0.039 mm (0.0008 - 0.0015 in)
Limit : 0.055 mm (0.0022 in)
PBIC1642E
KBIA2550E
Standard:
No. 1 and 5 journals
: 0.001 - 0.011 mm (0.00004 - 0.0004 in)
No. 2, 3 and 4 journals
: 0.007 - 0.017 mm (0.0003 - 0.0007 in)
Limit:
No. 1 and 5 journals
: 0.021 mm (0.0008 in)
No. 2, 3 and 4 journals
: 0.027 mm (0.0011 in)
PBIC1644E

CYLINDER BLOCK
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Revision: October 20052005 QX56
Method of Using Plastigage

Remove oil and dust on the crankshaft journal and surfaces of
each bearing completely.

Cut a plastigage slightly shorter than the bearing width, and
place it in crankshaft axial direction, avoiding oil holes.

Install the main bearings to the cylinder block and main bearing
cap, and tighten the main bearing bolts to the specified torque.
CAUTION:
Do not rotate crankshaft with plastigage installed.

Remove bearing cap and bearings. Measure plastigage width
using the scale on the plastigage bag.
NOTE:
The procedure when the measured value exceeds the repair limit is the same as that described in
“Method of Measurement”.
CRUSH HEIGHT OF MAIN BEARING

When the bearing cap is removed after being tightened to the
specified torque with main bearings installed, the tip end of the
bearing must protrude. Refer to EM-77, "
ASSEMBLY" for the
tightening procedure.

If standard is not met, replace main bearings.
CRUSH HEIGHT OF CONNECTING ROD BEARING

When connecting rod bearing cap is removed after being tight-
ened to the specified torque with the connecting rod bearings
installed, the tip end of the bearing must protrude. Refer to EM-
77, "ASSEMBLY" for the tightening procedure.

If standard is not met, replace connecting rod bearings.
MAIN BEARING CAP BOLT DIAMETER

Check for bolts (M9 and M12) installed from lower side using the
following procedure.
NOTE:

Side bolt (M10) is outside the target.

Figure shows M12 bolt.

Measure bolt diameter "d1" from tip of the bolt to dimension "a".

Measure bolt diameter "d"2 from the dimension between tip of
the bolt and dimension "b" as base station to dimension "c".
NOTE:
If a narrower part in the threads is determined by visual check,
measure ″d2″ at that point.

Calculate the difference between "d1" and "d2".
KBIA2551E
Standard : There must be crush height
SEM 50 2G
Standard : There must be crush height.
PBIC1646E
KBIA2497E

IDENTIFICATION INFORMATION
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Revision: October 20052005 QX56
DimensionsEAS001G4
Unit: mm (in)
Wheels & TiresEAS001G5
Drive type4x2 4x4
Overall length 5255 (206.9) 5255 (206.9)
Overall width 2001 (78.8) 2001 (78.8)
Overall height (with roof rack) 1976.8 (77.8) 1997.7 (78.7)
Front tread width 1725 (67.9) 1725 (67.9)
Rear tread width 1725 (67.9) 1725 (67.9)
Wheelbase 3130 (123.2) 3130 (123.2)
Minimum Running Ground Clearance (at front sus-
pension)With standard
undercover254.8 (10.03) 273.7 (10.77)
With oil pan skid
plate250.5 (9.86) 269.5 (10.61)
Drive Type Grade Road wheel Tire Spare tire size
All LE7-Spoke 18x8J Chromium Aluminum
AlloyP265/70R18 P265/70R18

IDX-8
ALPHABETICAL INDEX
Torque converter installation AT-245, AT-246, AT-248,
AT-249
Torque convertor clutch solenoid valve ... AT-115, AT-
117
Tow truck towing ................................................. GI-42
Towing point ....................................................... GI-43
TPS1 - Wiring diagram .................................... EC-266
TPS2 - Wiring diagram .................................... EC-203
TPS3 - Wiring diagram .................................... EC-606
Traction control system - Wiring diagram ....... BRC-16
Transfer control device ............. TF-76, TF-80, TF-138
Transfer control unit inspection table ................. TF-36
Transfer dropping resistor .................................. TF-90
Transfer fluid temperature sensor TF-104, TF-152, TF-
165
Transfer motor .................................... TF-102, TF-140
Transfer motor relay ........................................ TF-102
Transfer oil replacement ................................... MA-24
Transfer serial number ........................................ GI-48
Transmission serial number ................................ GI-48
Tread-FR&RR (Dimensions) ............................... GI-49
Trim ..................................................................... EI-35
TRNSCV - Wiring diagram .................. BL-140, BL-156
Trouble diagnoses .............................................. GI-11
Turbine revolution sensor ................................ AT-131
TURN - Wiring diagram ...................................... LT-83
Turn signal lamp ................................................. LT-80
Two trip detection logic ...................................... EC-48
Two-pole lift ........................................................ GI-41
V
Vacuum hose (brake system) ............................ BR-19
Vacuum hose drawing (Engine control) ........... EC-114
Valve clearance ................................................ EM-51
Valve guide ....................................................... EM-65
Vanity mirror lamp ............................................. LT-129
VDC (vehicle dynamics control) ........................ BRC-7
VDC -Wiring diagram ...................................... BRC-16
Vehicle identification number .............................. GI-47
Vehicle recovery (freeing a stuck vehicle) .......... GI-43
Vehicle security (theft warning) system ............. BL-75
Vehicle speed sensor (VSS) ............................ EC-372
VEHSEC - Wiring diagram ................................. BL-79
VENT/V - Wiring diagram .................. EC-327, EC-541
Video Monitor ..................................................... AV-60
VIN registration .................................................. EC-90
Viscosity number (SAE) .................................... MA-12
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W/ANT - Wiring diagram .................................... AV-49
Wait detection switch ......................................... TF-69
WARN - Wiring diagram ..................................... DI-31
Warning chime .................................................... DI-42
Warning lamps .................................................... DI-30
Washer, front ..................................................... WW-4
Washer, rear .................................................... WW-35
Water pump ...................................................... CO-17
Water temperature gauge ..................................... DI-5
Wheel alignment (front) ..................................... FSU-6
Wheel alignment (rear) ................................... RSU-27
Wheel bearing (front) ........................................ FAX-5
Wheel bearing (rear) ......................................... RAX-5
Wheel hub (rear) ............................................... RAX-5
Wheel size .......................................................... GI-49
Wheelbase (Dimensions) .................................... GI-49
Width (Dimensions) ............................................. GI-49
WINDOW - Wiring diagram .............................. GW-22
Window, door ...................................... GW-68, GW-71
Windshield ....................................................... GW-11
WIP/R - Wiring diagram ................................... WW-39
WIPER - Wiring diagram .................................. WW-11
Wiper, front ........................................................ WW-4
Wiper, rear ....................................................... WW-35
Wiring Diagram (Cell code) list ......................... PG-60
Wiring diagrams .................................................. GI-15
WT-T/WARN - Wiring diagram .......................... WT-11

TROUBLE DIAGNOSIS
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Revision: October 20052005 QX56
WORK SUPPORT
When there is no problem with transfer and 4WD system, following symptom in “AUTO” mode may be claimed
by a customer.

Vibration when accelerating on a low µ road (snow-covered or icy road)
It is possible to deal with these symptoms by changing “CLUTCH FORCE RELEASE LIMIT VALUE”.
However, be careful when changing the values because it may adversely affect driving performance.
NOTE:
A slight shock is felt at a few hertz as if it were being pushed lightly from behind.
Operation Procedure
1. Perform “CONSULT-II SETTING PROCEDURE”. Refer to TF-44, "CONSULT-II SETTING PROCEDURE"
.
2. Touch “WORK SUPPORT”.
3. Select from “CLUTCH/F RLS LIM ADJ”, screen of data monitor mode is displayed.
T/F F SPEED [km/h] or [mph]×–×Displayed, but do not use.
A/T R SPEED [km/h] or [mph]×–×Output shaft revolution signal (Revolution
sensor) calculated by TCM.
Signal input with CAN communication line.
AT GEAR POSI [1/2/3/4/5]×–×A/T actual gear position is displayed.
Voltage [V] – –×The value measured by the voltage probe is
displayed.
Frequency [Hz] – –×
The value measured by the pulse probe is
displayed. DUTY-HI (high) [%] – –×
DUTY-LOW (low) [%] – –×
PLS WIDTH-HI [msec] – –×
PLS WIDTH-LOW [msec] – –× Monitored item (Unit)Monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELEC-
TION FROM
MENU