2001 INFINITI QX4 4WD

System DescriptionNBEL0035The illumination lamp operation is controlled by the lighting switch which is built into the combination switch
and headlamp battery saver control unit. The battery saver system is controlled by the headlamp battery saver
control unit and smart entrance control unit.
Power is supplied at all times
Ito tail lamp relay terminals 2 and 3
Ithrough 10A fuse (No. 61, located in the fuse and fusible link box), and
Ito headlamp battery saver control unit terminal 7, and
Ito smart entrance control unit terminal 10
Ithrough 7.5A fuse [No. 24, located in the fuse block (J/B)].
When ignition switch is in ON or START position, power is supplied
Ito headlamp battery saver control unit terminal 1
Ithrough 10A fuse [No. 16, located in the fuse block (J/B)], and
Ito headlamp battery saver control unit terminal 10, and
Ito smart entrance control unit terminal 33
Ithrough 7.5A fuse [No. 11, located in the fuse block (J/B)].
Ground is supplied to headlamp battery saver control unit terminals 4 and 11.
LIGHTING OPERATION BY LIGHTING SWITCHNBEL0035S01When lighting switch is 1ST (or 2ND) position, ground is supplied
Ito tail lamp relay terminal 1 from headlamp battery saver control unit terminals 6 and 14
Ithrough headlamp battery saver control unit terminals 5 and 13, and
Ithrough body grounds E13 and E41.
Tail lamp relay is then energized and illumination lamps illuminate.
The lighting switch must be in the 1ST or 2ND position for illumination.
LIGHTING OPERATION BY AUTO LIGHT CONTROL SYSTEMNBEL0035S03When auto light operation is operated, ground is supplied
Ito tail lamp relay terminal 1 from headlamp battery saver control unit terminals 6 and 14
Ithrough headlamp battery saver control unit terminals 5 and 13, and
Ithrough auto light control unit terminal 7.
Tail lamp relay is then energized and the illumination lamps illuminate.
The illumination control switch that controls the amount of current to the illumination system. As the amount
of current increases, the illumination becomes brighter.
The following chart shows the power and ground connector terminals for the components included in the illu-
mination system.
Component Connector No. Power terminal Ground terminal
Illumination control switch M19 1 3
4WD shift switch M141 7 8
Ashtray M54 1 2
A/T indicator B59 3 4
Cigarette lighter M57 3 4
Audio unit M48 8 7
Compass and thermometer R4 5 2
Hazard switch M35 7 8
Rear window defogger switch M36 5 6
Headlamp aiming switch M16 3 4
Power window main switch D6 16 18
Front power window switch RH D36 10 17
ILLUMINATION
System Description
EL-80

3 CHECK IGN SW. ON SIGNAL
1. Turn ignition switch ON.
2. Check voltage between terminal 7 of IMMU and ground with CONSULT-II or tester.
SEL303WF
OK or NG
OK©GO TO 4.
NG©Check the following
I10A fuse [No. 16, located in the fuse block (J/B)]
IHarness for open or short between fuse and IMMU connector
Ref. part No. C2
4 CHECK GROUND CIRCUIT FOR IMMU
1. Turn ignition OFF.
2. Check harness continuity between IMMU terminal 4 and ground.
SEL304WD
OK or NG
OK©GO TO 5.
NG©Repair harness.Ref. part No. C3
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Trouble Diagnoses (Cont'd)
EL-338

9. Remove the crankshaft position sensors (REF and POS).
10. Remove drive belts and idler pulley with bracket.
11. Remove power steering oil pump, then put it aside holding with
a suitable wire.
12. Remove alternator.
SEM605G
13. Install engine slingers.
14. Remove front propeller shaft. (4WD)
Refer to PD-6, ªRemoval and Installationº.
15. Remove exhaust front tube heat insulators, then remove rear
heat oxygen sensors.
16. Remove exhaust front tube from both sides.
Refer to FE-8, ªRemoval and Installationº.
17. Remove front final drive. (4WD)
Refer to PD-18, ªRemoval and Installationº.
18. Remove starter motor.
19. Disconnect oil pressure switch harness connector.
SEM528G
20. Loosen and disconnect the bolts fixing the steering column
assembly lower joint and the power steering gear.
SEM471G
21. Set a suitable transmission jack under the front suspension
member and hoist engine with engine slingers.
EMQ0357D
22. Remove front engine mounting nuts from both sides.
OIL PAN
Removal (Cont'd)
EM-16

QUICK REFERENCE CHART: QX42001
Engine model VQ35DE
Firing order 1-2-3-4-5-6
Idle speed rpmA/T
(in ªNº position)750 50
Ignition timing (degree BTDC at idle speed) 15É 2É
CO% at idleIdle mixture screw is preset and
sealed at factory.
Drive belt deflection (Cold) mm (in) Used belt
Deflection of
new belt
LimitDeflection
after
adjustment
Alternator
Power steering oil pump
Fan7 (0.28)4-5
(0.16 - 0.20)3.5 - 4.5
(0.138 - 0.177)
Air conditioner compressor 12 (0.472)9-10
(0.354 - 0.394)8-9
(0.31 - 0.35)
Applied pressed force
N (kg, lb)98 (10, 22)
Drive belt tension adjustment (Cold)
N (kg, lb)Used belt
New belt
LimitAfter
adjustment
Alternator
Power steering pump
Fan294 (30, 66)730 - 818
(74.4 - 83.5,
164 - 184)838 - 926
(85.4 - 94.5,
188 - 208)
Air conditioner compressor 196 (20, 44)348 - 436
(35.5 - 44.5,
78 - 98)470 - 559
(47.9 - 57.0,
106 - 126)
Radiator cap relief pressure
kPa (kg/cm
2, psi)78 - 98 (0.8 - 1.0, 11 - 14)
Cooling system leakage testing pressure
kPa (kg/cm
2, psi)157 (1.6, 23)
Compression pressure
kPa (kg/cm
2, psi)/rpmStandard 1,275 (13.0, 185)/300
Minimum 981 (10.0, 142)/300
Spark plugStandard PLFR5A-11
Cold PLFR6A-11
Hot PLFR4A-11
Applied model 245/70 R16 tire
Camber
Degree minute
(Decimal degree)Minimum þ0É35¢(þ0.58É)
Nominal 0É10¢(0.17É)
Maximum 0É55¢(0.92É)
Left and right
difference45¢(0.75É) or less
Caster
Degree minute
(Decimal degree)Minimum 2É15¢(2.25É)
Nominal 3É00¢(3.00É)
Maximum 3É45¢(3.75É)
Left and right
difference45¢(0.75É) or less
Total toe-in Minimum 1 (0.04)
Distance (A þ B)
mm (in)Nominal 2 (0.08)
Maximum 3 (0.12)
Angle (left plus right)
Degree minute
(Decimal degree)Minimum 5¢(0.08É)
Nominal 10¢(0.17É)
Maximum 15¢(0.25É)
Wheel turning angle
(Full turn)Minimum 30É00¢(30.00É)
Inside
Degree minute
(Decimal degree)Nominal 33É00¢(33.00É)
Maximum 34É00¢(34.00É)
Outside
Degree minute
(Decimal degree)Minimum 28É00¢(28.00É)
Nominal 31É00¢(31.00É)
Maximum 32É00¢(32.00É)
* Fuel, radiator coolant and engine oil full.
Spare tire, jack, hand tools and mats in designated positions.
Unit: mm (in)Front brake
Pad wear limit 2.0 (0.079)
Rotor repair limit 26.0 (1.024)
Rear brake
Lining wear limit 1.5 (0.059)
Drum repair limit 296.5 (11.67)
Pedal free height 175 - 185 (6.89 - 7.28)
Pedal depressed height*1 70 (2.76)
Parking brake
Number of notches*2 6 - 8
*1 Under force of 490 N (50 kg, 110 lb) with engine running
*2 At pulling force: 196 N (20 kg, 44 lb)
Unit Liter US measure
Coolant with reservoir 9.2 9-3/4 qt
Engine*With oil filter 5.0 5-1/4 qt
Without oil filter 4.8 5-1/8 qt
Dry engine (engine overhaul) 6.8 7-1/4 qt
Transmis-
sionA/T2WD
8.5 9 qt
4WD
All-mode 4WD transfer 3.0 2-5/8 qt
Differential carrierFront 1.85 3-7/8 pt
Rear 2.8 5-7/8 pt
Power steering system 0.9 1 qt
Air conditioning systemRefrigerant 0.60 - 0.70 kg 1.32 - 1.54 lb
Compressor
oil0.20 6.8 fl oz
* For further details, see ªChanging Engine Oilº in MA section.
Preload
(At hub bolt)
N (kg, lb)Wheel bearing lock nut
78-98(8-10,58-72)
Tightening torque
N×m (kg-m, ft-lb)
Retightening torque after loosen-
ing wheel bearing lock nut
N×m (kg-m, in-lb)0.5 - 1.5 (0.05 - 0.15, 4.3 - 13.0)
Axial end play
mm (in)0 (0)
Starting force at wheel hub bolt
N (kg, lb)A
Turning angle
degree15É - 30É
Starting force at wheel hub bolt
N (kg, lb)B
Wheel bearing preload at wheel hub
bolt
B þ A N (kg, lb)7.06 - 20.99 (0.72 - 2.14, 1.59 - 4.72)

Wheels & Tires ..........................................................44
LIFTING POINTS AND TOW TRUCK TOWING...........45
Screw Jack ................................................................45
Garage Jack and Safety Stand .................................46
2-pole Lift ...................................................................47
Tow Truck Towing ......................................................472WD MODELS.........................................................48
4WD MODELS.........................................................48
VEHICLE RECOVERY..............................................49
TIGHTENING TORQUE OF STANDARD BOLTS........50
SAE J1930 TERMINOLOGY LIST................................51
SAE J1930 Terminology List .....................................51
CONTENTS(Cont'd)
GI-2

ISERVICE DATA AND SPECIFICATIONSare contained at the end of each section for quick reference of
data.
IThe followingSYMBOLS AND ABBREVIATIONSare used:
SYMBOL ABBREVIATION SYMBOL ABBREVIATION
Tightening torque
2WD2-Wheel Drive
Should be lubricated with grease. Unless oth-
erwise indicated, use recommended multi-pur-
pose grease.A/CAir Conditioner
Should be lubricated with oil. P/S Power Steering
Sealing point SST Special Service Tools
Checking point SAE Society of Automotive Engineers, Inc.
Always replace after every disassembly. ATF Automatic Transmission Fluid
qP
Apply petroleum jelly.
D1Drive range 1st gear
Apply ATF. D2Drive range 2nd gear
HSelect with proper thickness. D
3Drive range 3rd gear
IAdjustment is required. D
4Drive range 4th gear
SDS Service Data and Specifications OD Overdrive
LH, RH Left-Hand, Right-Hand 2
22nd range 2nd gear
FR, RR Front, Rear 2
12nd range 1st gear
M/T Manual Transaxle/Transmission 1
21st range 2nd gear
A/T Automatic Transaxle/Transmission 1
11st range 1st gear
,
4WD4-Wheel Drive
HOW TO USE THIS MANUAL
GI-10

NBGI0006
Function and System ApplicationNBGI0006S01
Diagnostic
test modeFunction ENGINEALL-
MODE
4WDA/T ABSAIR
BAGIVCS*1IVIS
(NATS)*2SMART
EN-
TRANCE
Work sup-
portThis mode enables a
technician to adjust some
devices faster and more
accurate by following the
indications on CONSULT-
II.x x ÐÐÐÐÐÐ
Self-diag-
nostic
resultsSelf-diagnostic results
can be read and erased
quickly.xxxxxxxÐ
Trouble
diagnostic
recordCurrent self-diagnostic
results and all trouble
diagnostic records previ-
ously stored can be read.ÐÐÐÐ x ÐÐÐ
ECU dis-
criminated
No.Classification number of
a replacement ECU can
be read to prevent an
incorrect ECU from being
installed.ÐÐÐÐ x ÐÐÐ
Data monitorInput/Output data in the
ECU (ECM) can be read.x x x xÐxÐÐ
Data monitor
(Spec.)The specified values will
be displayed when an
OK/NG jugement is diffi-
cult for the DATA MONI-
TOR items by Barchart
and Line Graph.x ÐÐÐÐÐÐÐ
DTC work
supportThis mode enables a
technician to set operat-
ing conditions to confirm
self-diagnosis status/
results.ÐÐ x ÐÐÐÐÐ
Active testDiagnostic Test Mode in
which CONSULT-II drives
some actuators apart
from the ECMs and also
shifts some parameters
in a specified range.x ÐÐ x ÐÐÐÐ
ECU (ECM)
part numberECU (ECM) part number
can be read.x x x xÐxÐÐ
Control unit
initializationAll registered ignition key
IDs in NATS components
can be initialized and
new IDs can be regis-
tered.ÐÐÐÐÐÐ x Ð
SRT & DTC
confirmationThe results of SRT (Sys-
tem Readiness Test) and
the self-diagnosis status/
results can be confirmed.x ÐÐÐÐÐÐÐ
Function
checkªRemote door unlock
functionº of IVCS system
can be checked in this
mode.ÐÐÐÐÐ x ÐÐ
CONSULT-II CHECKING SYSTEM
Function and System Application
GI-38

Diagnostic
test modeFunction ENGINEALL-
MODE
4WDA/T ABSAIR
BAGIVCS*1IVIS
(NATS)*2SMART
EN-
TRANCE
Registered
dataDisplay the VIN, etc. data
registered in the IVCS
unit.ÐÐÐÐÐ x ÐÐ
Configura-
tionIThe IVCS system can
be set up in the dem-
onstration mode to
confirm system opera-
tion.
IVarious data related to
both the Communica-
tor Response Center
contract and cellular
provider can be
written/rewritten in this
mode.ÐÐÐÐÐ x ÐÐ
REMO
CONT ID
SET UPA maximum of four IDs
(identifications) can be
registered in the memory
using the remote control-
ler. These IDs can be
also be confirmed and
erased as required.ÐÐÐÐÐÐÐ x
x: Applicable
*1: INFINITI Communicator (IVCS)
*2: IVIS (NATS) [INFINITI Vehicle Immobilizer System (Nissan Anti-Theft System)]
Nickel Metal Hydride Battery ReplacementNBGI0006S06CONSULT-II contains a nickel metal hydride battery. When replacing the battery obey the following:
WARNING:
Replace the nickel metal hydride battery with Genuine CONSULT-II battery only. Use of another bat-
tery may present a risk of fire or explosion. The battery may present a fire or chemical burn hazard if
mistreated. Do not recharge, disassemble of dispose of in fire.
Keep the battery out of reach of children and discard used battery conforming to the local regulations.
Checking EquipmentNBGI0006S07When ordering the below equipment, contact your NISSAN/INFINITI distributor.
Tool name Description
NISSAN CONSULT-II
q
1CONSULT-II unit (Tester internal soft:
Resident version 3.2.0) and accessories
q
2Program card AED99C (Version 3.0)
and UEN99A (For IVIS and IVCS)
To confirm the best combination of these
softwares, refer to CONSULT-II Operation
Manual.
SGI100A
NOTE:
IThe CONSULT-II must be used in conjunction with a program card.
CONSULT-II does not require loading (Initialization) procedure.
IBe sure the CONSULT-II is turned off before installing or removing a program card.
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
CONSULT-II CHECKING SYSTEM
Function and System Application (Cont'd)
GI-39