2001 INFINITI QX4 horn

Smart Entrance Control Unit Inspection TableNBEL0126
Terminal
No.Wire
colorConnections Operated conditionVoltage
(Approximate
values)
2 G/B Rear window defogger relay OFF,ON (Ignition key is in ªONº position) 0V,12V
4 PU/W Theft warning horn/lamp relay When panic alarm is operated using remote controller 12V,0V
5 R/YHeadlamp battery saver control
unitWhen headlamp battery saver timer is operated 12V
7 P Multi-remote control relay When doors are locked using remote controller 12V,0V
8 R/B Interior lampWhen interior lamp is operated using remote controller.
(Lamp switch in ªDOORº position)0V,12V
10 G/R Power source (Fuse) Ð 12V
11 W/R Power source (C/B) Ð 12V
13 W/PU Driver door lock actuator
Door lock & unlock switchFree 0V
14 Y/B Passenger door lock actuator Unlocked 12V
15 L Door lock actuators Door lock & unlock switchFree 0V
Locked 12V
16 B Ground Ð Ð
17 R/W Battery saver (Interior lamp) Battery saver is not operate,Operate 12V,0V
19 LG/B Horn relayWhen doors are locked using remote controller with horn
chirp mode.12V,0V
21 G/W Ignition switch (ACC) ªACCº position 12V
22 B/P Seat belt buckle switch Unfasten,Fasten (Ignition key is in ªONº position) 0V,12V
23 BR Door lock & unlock switches Neutral,Locks 5V,0V
26 Y/R Rear door unlock sensors All doors are locked,One or more doors are unlocked 5V,0V
27 Y/B Hood open signal ON (Open),OFF (Closed) 0V,5V
28 R/L Rear and back door switches OFF (Closed),ON (Open) 5V,0V
29 G/R Driver door switch OFF (Closed),ON (Open) 5V,0V
30 LG Door key cylinder unlock switch OFF (Neutral),ON (Unlocked) 12V,0V
31 BR/Y Theft warning indicator Goes off,Illuminates 12V,0V
32 W/R Ignition key switch (Insert) key inserted,key removed from IGN key cylinder 12V,0V
33 W/B Ignition switch (ON) Ignition key is in ªONº position 12V
35 LG/R Door lock & unlock switches Neutral,Unlocks 5V,0V
36 Y/G Driver door unlock sensor Driver door: Locked,Unlocked 5V,0V
37 Y/L Passenger door unlock sensor Passenger door: Locked,Unlocked 5V,0V
38 L/W Glass hatch switch ON (Open),OFF (Closed) 0V,12V
39 OR Rear window defogger switch OFF,ON 5V,0V
40 Y Passenger door switch OFF (Closed),ON (Open) 5V,0V
41 Y Door key cylinder lock switch OFF (Neutral),ON (Locked) 5V,0V
42 G/B Back door key unlock switch OFF (Neutral),ON (Unlock) 5V,0V
SMART ENTRANCE CONTROL UNIT
Smart Entrance Control Unit Inspection Table
EL-324

TELEPHONE STEERING SWITCH CHECK=NBEL0184S14
1 CHECK POWER SUPPLY FOR STEERING SWITCH
Check power supply for steering switch.
Does horn work?
Ye s©Check the following.
I10A fuse (No. 54, located in fuse and fusible link box)
IHorn relay
IHarness for open or short
No©GO TO 2.
2 CHECK STEERING SWITCH SUB-HARNESS
1. Remove driver's air bag module. For removal procedure, refer to RS section.
2. Check steering switch sub-harness for open or short and ground screw.
For details of the harness circuit, refer to ªSTEERING SWITCHº, EL-30.
OK or NG
OK©Check harness for open or short between telephone steering switch and IVCS unit. If the
circuit is OK, replace telephone steering switch.
NG©Replace or repair the harness.
Trouble Diagnoses for Intermittent IncidentNBEL0185DESCRIPTIONNBEL0185S01An intermittent incident may be occurring if all of the following conditions exist.
IBoth ªMAYDAYº emergency and ªINFORMATIONº indicators have shown that the system is malfunction-
ing.
ICONSULT-II self-diagnosis result screen indicates a trouble code with ªTIME=1orgreaterº.
IThe INFINITI Communicator system has not been previously serviced.
To find out the cause of a malfunction, follow the procedures shown below.
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INFINITI COMMUNICATOR (IVCS)
Trouble Diagnoses (Cont'd)
EL-377

NBEL0145
Use the chart below to find out what each wiring
diagram code stands for.
Refer to the wiring diagram code in the alphabetical
index to find the location (page number) of each
wiring diagram.
Code Section Wiring Diagram Name
1STSIG AT A/T 1ST Signal
2NDSIG AT A/T 2ND Signal
3RDSIG AT A/T 3RD Signal
4THSIG AT A/T 4TH Signal
A/C, A HA Auto Air Conditioner
AAC/V EC IACV-AAC Valve
ABS BR Anti-lock Brake System
AP/SEN EC Absolute Pressure Sensor
ASCD EL Automatic Speed Control Device
AT/C EC A/T Control
ATDIAG EC A/T Diagnosis Communication
Line
AT/IND EL A/T Indicator Lamp
AUDIO EL Audio
AUT/DP EL Automatic Drive Positioner
BA/FTS AT A/T Fluid Temperature Sensor
and TCM Power Supply
BACK/L EL Back-up Lamp
BYPS/V EC Vacuum Cut Valve Bypass Valve
CHARGE SC Charging System
CHIME EL Warning Chime
CIGAR EL Cigarette Lighter
CLOCK EL Clock
COMPAS EL Compass and Thermometer
D/LOCK EL Power Door Lock
DEF EL Rear Window Defogger
DTRL EL Headlamp Ð With Daytime Light
System Ð
ECTS EC Engine Coolant Temperature Sen-
sor
ENGSS AT Engine Speed Signal
F/FOG EL Front Fog Lamp
F/LID EL Fuel Lid Opener
F/PUMP EC Fuel Pump Control
FICD EC IACV-FICD Solenoid Valve
FLS1 EC Fuel Gauge
Code Section Wiring Diagram Name
FLS2 EC Fuel Gauge
FLS3 EC Fuel Gauge
FTS AT A/T Fluid Temperature Sensor
FUELLH EC Fuel Injection System Function
(Left Bank)
FUELRH EC Fuel Injection System Function
(Right Bank)
H/AIM EL Headlamp Aiming Control System
H/LAMP EL Headlamp
HORN EL Horn
HSEAT EL Heated Seat
IATS EC Intake Air Temperature Sensor
IGN/SG EC Ignition Signal
ILL EL Illumination
INJECT EC Injector
INT/L EL Interior, Spot, Vanity Mirror, and
Luggage Room Lamps
IVC-L EC Intake Valve Timing Control Sole-
noid Valve LH
IVC-R EC Intake Valve Timing Control Sole-
noid Valve RH
IVCS EL INFINITI Communicator
IVCS-L EC Intake Valve Timing Control Posi-
tion Sensor LH
IVCS-R EC Intake Valve Timing Control Posi-
tion Sensor RH
KS EC Knock Sensor
LAN AT A/T Communication Line
LOAD EC Electrical Load Signal
LPSV AT Line Pressure Solenoid Valve
MAFS EC Mass Air Flow Sensor
MAIN AT Main Power Supply and Ground
Circuit
MAIN EC Main Power Supply and Ground
Circuit
METER EL Speedometer, Tachometer, Temp.,
Oil, and Fuel Gauges
MIL/DL EC MIL and Data Link Connectors
MIRROR EL Door Mirror
MULTI EL Multi-remote Control System
NATS EL IVIS (Infiniti Vehicle Immobiliser
System)
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WIRING DIAGRAM CODES (CELL CODES)
EL-457

Fusible link ......................................................EL-16
G
Garage jack and safety stand .........................GI-46
Gauges............................................................EL-94
Generator - See Alternator .............................SC-28
Generic scan tool (GST) ................................EC-95
Glass ...............................................................BT-18
Glass hatch opener, electric .........................EL-178
Grease ............................................................MA-11
Ground distribution..........................................EL-17
H
Harness connector ............................................EL-5
Harness connector inspection .........................GI-21
Harness layout ..............................................EL-440
Hazard warning lamp ......................................EL-75
Headlamp ........................................................EL-31
Headlamp aiming control ................................EL-59
Headlining - See Roof trim .............................BT-32
Heated seat .......................................BT-43, EL-183
Height (Dimensions) ........................................GI-43
HFC134a (R134a) system precaution .............HA-2
HFC134a (R134a) system service
procedure ..................................................HA-144
HFC134a (R134a) system service tools ........HA-11
HFC134a system service equipment
precaution .....................................................HA-7
High clutch.....................................................AT-317
H/LAMP - Wiring diagram ...............................EL-36
Hood................................................................BT-12
Horn ..............................................................EL-147
HORN - Wiring diagram................................EL-147
How to erase DTC for OBD system...............EC-72
HSEAT - Wiring diagram...............................EL-183
I
IACV-AAC valve ...........................................EC-422
IATS - Wiring diagram ..................................EC-166
Identification .....................................................HA-4
Identification plate............................................GI-42
Idle air control valve (IACV) .........................EC-422
Idle mixture ratio.............................................EC-43
Idle speed .......................................................EC-43
IGN/SG - Wiring diagram .............................EC-501
Ignition control system .................................EC-499
Ignition timing .................................................EC-43
ILL - Wiring diagram .......................................EL-83
Illumination ......................................................EL-80
In vehicle sensor ..........................................HA-132
INFINITI COMMUNICATOR..........................EL-348
Infiniti communicator (IVCS) .........................EL-348
INJECT - Wiring diagram .............................EC-617
Injector ..........................................................EC-616Injector removal and installation ....................EC-41
Instrument panel .............................................BT-21
INT/L - Wiring diagram....................................EL-91
Intake air temparature sensor ......................EC-164
Intake door control linkage adjustment ..........HA-94
Intake door motor ...........................................HA-87
Intake manifold...............................................EM-12
Intake sensor ................................................HA-139
Integrated homelink transmitter ....................EL-325
Interior .............................................................BT-28
Interior lamp ....................................................EL-88
Interior lamp on-off control ..............................EL-89
Internal gear (Transfer) .................................TF-134
IVC-L - Wiring diagram.................................EC-453
IVC-R - Wiring diagram ................................EC-453
IVCS - Wiring diagram ..................................EL-359
IVCS-L - Wiring diagram ..............................EC-485
IVCS-R - Wiring diagram .............................EC-485
IVIS (Infiniti vehicle immobilizer
system) ......................................................EL-328
IVIS (Infiniti vehicle immobilizer sys-
tem) precautions ............................................GI-3
J
Jacking points ..................................................GI-45
Journal bearing assembly (propeller
shaft) .............................................................PD-9
Journal bearing disassembly (propeller
shaft) .............................................................PD-8
Junction box (J/B).........................................Foldout
K
Keyless entry system - See Multi-re-
mote control system ..................................EL-270
Knock sensor (KS) .......................................EC-328
Knuckle spindle ................................................AX-9
KS - Wiring diagram .....................................EC-330
L
Length (Dimensions) .......................................GI-43
License lamp ...................................................EL-61
Lifting points ....................................................GI-47
Limited slip diff. adjustment ............................PD-50
Limited slip diff. assembly ..............................PD-51
Limited slip diff. disassembly..........................PD-48
Limited slip diff. inspection .............................PD-49
Line pressure solenoid valve ........AT-147, 161, 167
Line pressure switch (Transfer) .....................TF-111
Line pressure test (A/T) ..................................AT-62
Liquid gasket application .................................EM-3
LOAD - Wiring diagram ................................EC-643
Location of electrical units ............................EL-436
Lock, door .......................................................BT-18
Low and reverse brake .................................AT-324
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ALPHABETICAL INDEX
IDX-5

System CheckNBLC0016WARNING:
Never remove the radiator cap when the engine is hot; serious
burns could be caused by high pressure fluid escaping from
the radiator.
Wrap a thick cloth around the cap and carefully remove it by
turning it a quarter turn to allow built-up pressure to escape
and then turn the cap all the way off.
CHECKING COOLING SYSTEM HOSESNBLC0016S01Check hoses for improper attachment, leaks, cracks, damage,
loose connections, chafing and deterioration.
CHECKING RADIATORNBLC0016S02Check radiator for mud or clogging. If necessary, clean radiator as
follows.
IBe careful not to bend or damage the radiator fins.
IWhen radiator is cleaned without removal, remove all sur-
rounding parts such as cooling fan, radiator shroud and horns.
Then tape the harness and connectors to prevent water from
entering.
1. Apply water by hose to the back side of the radiator core ver-
tically downward.
2. Apply water again to all radiator core surfaces once per
minute.
3. Stop washing if any stains no longer flow out from the radia-
tor.
4. Blow air into the back side of radiator core vertically downward.
IUse compressed air lower than 490 kPa (5 kg/cm
2, 71 psi) and
keep distance more than 30 cm (11.8 in).
5. Blow air again into all the radiator core surfaces once per
minute until no water sprays out.
SLC755A
CHECKING RADIATOR CAPNBLC0016S03To check radiator cap, apply pressure to cap with a tester.
Radiator cap relief pressure:
Standard
78-98kPa
(0.8 - 1.0 kg/cm
2, 11 - 14 psi)
Limit
59-98kPa
(0.6 - 1.0 kg/cm
2,9-14psi)
SMA967B
Pull the negative pressure valve to open it.
Check that it closes completely when released.
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ENGINE COOLING SYSTEM
System Check
LC-11

SBF814E
IReplace air bag module if it has been dropped or sus-
tained an impact.
IDo not expose the air bag module to temperatures exceed-
ing 90ÉC (194ÉF).
IDo not allow oil, grease or water to come in contact with
the air bag module.
SBF239F
3. Set steering wheel in the neutral position.
4. Disconnect horn connector and remove nuts.
5. Remove dynamic damper. Then using steering wheel puller,
remove steering wheel. Be careful not to over-tighten puller
bolt on steering wheel.
CAUTION:
IDo not tap or bump the steering wheel.
6. Remove steering column cover.
SRS384
7. Unlock the spiral cable connector. Then disconnect connectors
and remove the four screws. The spiral cable can then be
removed.
CAUTION:
IDo not attempt to disassemble spiral cable.
IDo not apply lubricant to the spiral cable.
SRS276
INSTALLATIONNBRS00151. Set the front wheels in the straight-ahead position.
2. Make sure that the spiral cable is in the neutral position.
The neutral position is detected by turning left about 2.5 revo-
lutions from the right end position. Align the two marks (
).
CAUTION:
IThe spiral cable may snap due to steering operation if the
cable is installed in an improper position.
IAlso, with the steering linkage disconnected, the cable
may snap by turning the steering wheel beyond the limited
number of turns. The spiral cable can be turned to the left
about 2.5 turns from the right end position.
3. Connect spiral cable connector and tighten with screws. Install
steering column cover.
4. Install steering wheel, aligning with spiral cable pin guides, and
pull spiral cable through.
5. Connect horn connector and engage spiral cable with pawls in
steering wheel. Move air bag module connector away from
steering wheel lower lid opening.
6. Tighten nut.
: 29.4 - 39.2 N´m (3.0 - 4.0 kg-m, 22 - 28 ft-lb)
7. Install dynamic damper.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Driver Air Bag Module and Spiral Cable (Cont'd)
RS-18