light INFINITI QX4 2001 Factory Repair Manual

TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
89 ORIntake valve timing
control position sen-
sors (LH)[Engine is running]
IWarm-up condition
IIdle speedApproximately 0.5V
SEF351Z
[Engine is running]
IWarm-up condition
IEngine speed is 2,000 rpm.Approximately 0.5V
SEF352Z
On Board Diagnosis LogicNBEC0694Malfunction is detected when:
(Malfunction A)
The alignment of the intake valve timing control has been misreg-
istered.
(Malfunction B)
There is a gap between angle of target and phase-control angle
degree.
FAIL-SAFE MODENBEC0694S01When malfunction A or B is detected, the ECM enters fail-safe
mode and the MIL lights up.
Detected items Engine operating condition in fail-safe mode
Intake valve timing control The signal is not energized to the solenoid valve and the valve control does not function.
Possible CauseNBEC0695MALFUNCTION A OR BNBEC0695S01IHarness or connectors
(Intake valve timing control position sensor circuit is open or
shorted.) Refer to EC-482.
ICrankshaft position sensor (REF)
ICrankshaft position sensor (POS)
ICamshaft position sensor (PHASE)
DTC P1110 (RIGHT, -B1), P1135 (LEFT, -B2) INTAKE VALVE TIMING CONTROL
ECM Terminals and Reference Value (Cont'd)
EC-448

4 CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect rear window defogger relay.
4. Check harness continuity between ECM terminal 52 and rear window defogger relay terminals 7.
SEF031Z
5. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 6.
NG©GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors E1, M1
IHarness connectors M33, F22
IDiode M37
IHarness for open and short between ECM and rear window defigger relay
©Repair open circuit or short to ground or short to power in harness or connectors.
6 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-140.
©INSPECTION END
7 CHECK HEADLAMP FUNCTION
1. Start engine.
2. Turn the lighting switch ªONº at 1st position with high beam.
3. Check that headlamps are illuminated.
OK or NG
OK©GO TO 8.
NG©Refer to EL-60, ªHEADLAMP (FOR USA)º or EL-123, ªHEADLAMP (FOR CANADA) Ð
DAYTIME LIGHT SYSTEMº.
ELECTRICAL LOAD SIGNAL
Diagnostic Procedure (Cont'd)
EC-646

8 CHECK HEADLAMP INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect headlamp LH relay.
4. Check harness continuity between ECM terminal 52 and headlamp LH relay terminal 7 under the following conditions.
SEF031Z
5. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 10.
NG©GO TO 9.
9 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors E1, M1
IHarness connectors M33, F22
IDiode E121
IHarness for open and short between ECM and headlamp LH relay or daytime light control unit
©Repair open circuit or short to ground or short to power in harness or connectors.
10 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-140.
©INSPECTION END
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ELECTRICAL LOAD SIGNAL
Diagnostic Procedure (Cont'd)
EC-647

Fuel Pressure RegulatorNBEC0408
Fuel pressure at idling kPa (kg/cm2, psi)
Vacuum hose is connected. Approximately 235 (2.4, 34)
Vacuum hose is disconnected. Approximately 294 (3.0, 43)
Idle Speed and Ignition TimingNBEC0409
Target idle speed*1 No-load*2 (in ªPº or Nº position) 750±50 rpm
Air conditioner: ON In ªPº or Nº position 825 rpm or more
Ignition timing*1 In ªPº or Nº position 15ɱ5É BTDC
Throttle position sensor idle position0.15 - 0.85V
*1: Throttle position sensor harness connector connected
*2: Under the following conditions:
IAir conditioner switch: OFF
IElectric load: OFF (Lights, heater fan & rear window defogger)
ISteering wheel: Kept in straight-ahead position
Mass Air Flow SensorNBEC0411
Supply voltageBattery voltage (11 - 14)V
Output voltage at idle1.2 - 1.8*V
Mass air flow (Using CONSULT-II or GST)2.0 - 6.0 g´m/sec at idle*
7.0 - 20.0 g´m/sec at 2,500 rpm*
*: Engine is warmed up to normal operating temperature and running under no-load.
Engine Coolant Temperature SensorNBEC0412
Temperature ÉC (ÉF) Resistance kW
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
Heated Oxygen Sensor 1 Heater (Front)NBEC0414
Resistance [at 25ÉC (77ÉF)]2.3 - 4.3W
Fuel PumpNBEC0415
Resistance [at 25ÉC (77ÉF)]0.2 - 5.0W
IACV-AAC ValveNBEC0416
Resistance [at 20ÉC (68ÉF)]Approximately 20 - 24W
InjectorNBEC0417
Resistance [at 20ÉC (68ÉF)]13.5 - 17.5W
ResistorNBEC0418
Resistance [at 25ÉC (77ÉF)]Approximately 2.2 kW
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SERVICE DATA AND SPECIFICATIONS (SDS)
Fuel Pressure Regulator
EC-649

ELECTRICAL SYSTEM
SECTION
EL
CONTENTS
PRECAUTIONS...............................................................4
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER²...............4
Wiring Diagrams and Trouble Diagnosis .....................4
HARNESS CONNECTOR................................................5
Description ...................................................................5
STANDARDIZED RELAY................................................7
Description ...................................................................7
POWER SUPPLY ROUTING...........................................9
Schematic ....................................................................9
Wiring Diagram - POWER - ......................................10
Inspection...................................................................16
GROUND........................................................................17
Ground Distribution ....................................................17
COMBINATION SWITCH..............................................28
Check .........................................................................28
Replacement ..............................................................29
STEERING SWITCH......................................................30
Check .........................................................................30
HEADLAMP (FOR USA) - XENON TYPE -..................31
Component Parts and Harness Connector
Location .....................................................................31
System Description ....................................................31
Schematic ..................................................................35
Wiring Diagram - H/LAMP -.......................................36
Trouble Diagnoses.....................................................40
Bulb Replacement/Xenon Type .................................43
Aiming Adjustment .....................................................44
HEADLAMP (FOR CANADA) - DAYTIME LIGHT
SYSTEM -......................................................................46
Component Parts and Harness Connector
Location .....................................................................46
System Description ....................................................46
Schematic ..................................................................50
Wiring Diagram - DTRL - ...........................................51
Trouble Diagnoses.....................................................56
Bulb Replacement .....................................................57
Aiming Adjustment .....................................................58
HEADLAMP - HEADLAMP AIMING CONTROL -........59System Description ....................................................59
Wiring Diagram - H/AIM - ..........................................60
PARKING, LICENSE AND TAIL LAMPS.....................61
System Description ....................................................61
Schematic ..................................................................62
Wiring Diagram - TAIL/L - ..........................................63
Trouble Diagnoses.....................................................66
STOP LAMP..................................................................67
Wiring Diagram - STOP/L - .......................................67
BACK-UP LAMP............................................................69
Wiring Diagram - BACK/L - .......................................69
FRONT FOG LAMP.......................................................70
System Description ....................................................70
Wiring Diagram - F/FOG - .........................................72
Aiming Adjustment .....................................................74
TURN SIGNAL AND HAZARD WARNING LAMPS.....75
System Description ....................................................75
Wiring Diagram - TURN - ..........................................77
Trouble Diagnoses.....................................................79
Electrical Components Inspection .............................79
ILLUMINATION..............................................................80
System Description ....................................................80
Schematic ..................................................................82
Wiring Diagram - ILL - ...............................................83
INTERIOR, SPOT, VANITY MIRROR AND
LUGGAGE ROOM LAMPS...........................................88
System Description ....................................................88
Schematic ..................................................................90
Wiring Diagram - INT/L - ...........................................91
METERS AND GAUGES...............................................94
Component Parts and Harness Connector
Location .....................................................................94
System Description ....................................................94
Combination Meter ....................................................96
Schematic ..................................................................98
Wiring Diagram - METER - .......................................99
Meter/Gauge Operation and Odo/Trip Meter
Segment Check in Diagnosis Mode ........................100
Trouble Diagnoses...................................................101
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Electrical Components Inspection ...........................108
COMPASS AND THERMOMETER............................. 110
System Description .................................................. 110
Wiring Diagram - COMPAS -................................... 111
Trouble Diagnoses................................................... 112
Calibration Procedure for Compass ........................ 113
WARNING LAMPS...................................................... 114
Schematic ................................................................ 114
Wiring Diagram - WARN - ....................................... 115
Fuel Warning Lamp Sensor Check .........................122
Electrical Components Inspection ...........................122
A/T INDICATOR...........................................................123
Wiring Diagram - AT/IND -.......................................123
WARNING CHIME.......................................................125
Component Parts and Harness Connector
Location ...................................................................125
System Description ..................................................125
Wiring Diagram - CHIME - ......................................127
Trouble Diagnoses...................................................129
FRONT WIPER AND WASHER..................................136
System Description ..................................................136
Wiring Diagram - WIPER - ......................................138
Removal and Installation .........................................139
Washer Nozzle Adjustment .....................................140
Washer Tube Layout ...............................................140
REAR WIPER AND WASHER....................................141
System Description ..................................................141
Wiring Diagram - WIP/R -........................................143
Trouble Diagnoses...................................................145
Removal and Installation .........................................145
Washer Nozzle Adjustment .....................................146
Washer Tube Layout ...............................................146
Check Valve .............................................................146
HORN...........................................................................147
Wiring Diagram - HORN - .......................................147
CIGARETTE LIGHTER................................................148
Wiring Diagram - CIGAR -.......................................148
CLOCK.........................................................................150
Wiring Diagram - CLOCK -......................................150
REAR WINDOW DEFOGGER.....................................151
Component Parts and Harness Connector
Location ...................................................................151
System Description ..................................................151
Wiring Diagram - DEF - ...........................................153
Trouble Diagnoses...................................................155
Electrical Components Inspection ...........................157
Filament Check ........................................................157
Filament Repair .......................................................158
AUDIO..........................................................................160
System Description ..................................................160
Schematic ................................................................161
Wiring Diagram - AUDIO - .......................................162Trouble Diagnoses...................................................166
Inspection.................................................................167
Wiring Diagram - REMOTE -...................................168
AUDIO ANTENNA.......................................................169
System Description ..................................................169
Wiring Diagram - P/ANT - .......................................170
Trouble Diagnoses...................................................171
Location of Antenna .................................................171
Antenna Rod Replacement .....................................171
POWER SUNROOF.....................................................173
System Description ..................................................173
Wiring Diagram - SROOF - .....................................174
Trouble Diagnoses...................................................176
DOOR MIRROR...........................................................177
Wiring Diagram - MIRROR - ...................................177
GLASS HATCH OPENER...........................................178
System Description ..................................................178
Wiring Diagram - TLID - ..........................................179
FUEL FILLER LID OPENER.......................................180
Wiring Diagram - F/LID - .........................................180
POWER SEAT.............................................................181
Wiring Diagram - SEAT - .........................................181
HEATED SEAT............................................................183
Wiring Diagram - HSEAT - ......................................183
Seatback Heating Unit .............................................185
AUTOMATIC DRIVE POSITIONER............................186
Component Parts and Harness Connector
Location ...................................................................186
System Description ..................................................187
Schematic ................................................................190
Wiring Diagram - AUT/DP - .....................................191
On Board Diagnosis ................................................196
Trouble Diagnoses...................................................198
AUTOMATIC SPEED CONTROL DEVICE (ASCD)...221
Component Parts and Harness Connector
Location ...................................................................221
System Description ..................................................222
Schematic ................................................................224
Wiring Diagram - ASCD - ........................................225
Fail-safe System ......................................................229
Trouble Diagnoses...................................................230
Electrical Component Inspection .............................239
ASCD Wire Adjustment ...........................................240
POWER WINDOW.......................................................241
System Description ..................................................241
Schematic ................................................................244
Wiring Diagram - WINDOW - ..................................245
Trouble Diagnoses...................................................250
POWER DOOR LOCK.................................................254
Component Parts and Harness Connector
Location ...................................................................254
System Description ..................................................254
CONTENTS(Cont'd)
EL-2

Component Parts and Harness Connector
Location
NBEL0159
SEL460X
System DescriptionNBEL0188The headlamp operation is controlled by the lighting switch which is built into the combination switch and
headlamp battery saver control unit. And the headlamp battery saver system is controlled by the headlamp
battery saver control unit and smart entrance control unit.
OUTLINENBEL0188S01Power is supplied at all times
Ito headlamp LH relay terminals 1 and 3
Ithrough 15A fuse (No. 60, located in the fuse and fusible link box), and
Ito headlamp LH relay terminal 6
Ithrough 20A fuse (No. 32, located in the fuse and fusible link box), and
Ito headlamp RH relay terminals 1 and 3
Ithrough 15A fuse (No. 59, located in the fuse and fusible link box), and
Ito headlamp RH relay terminal 6
Ithrough 20A fuse (No. 31, 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 the ignition switch is in the 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,
Ito auto light control unit terminal 1 and
Ito smart entrance control unit terminal 33
Ithrough 7.5A fuse [No. 11, located in the fuse block (J/B)].
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HEADLAMP (FOR USA) Ð XENON TYPE Ð
Component Parts and Harness Connector Location
EL-31

When the ignition switch is in the ACC or ON position, power is supplied
Ito auto light control unit terminal 2
Ithrough 10A fuse [No. 9, located in the fuse block (J/B)]
Ground is supplied
Ito headlamp battery saver control unit terminals 4 and 11
Ithrough body grounds M77 and M111, and M4,M66 and M147
Ito auto light control unit terminal 5
Ithrough body grounds M4, M66 and M147.
Power Supply to Low Beam and High BeamNBEL0188S0101When lighting switch is in 2ND or PASS position, ground is supplied
Ito headlamp relay (LH and RH) terminal 2 from headlamp battery saver control unit terminals 2 and 8
Ithrough headlamp battery saver control unit terminals 3 and 9,
Ifrom lighting switch terminal 12.
Headlamp relays (LH and RH) are energized and then power is supplied to headlamps (LH and RH).
LOW BEAM OPERATIONNBEL0188S02When the lighting switch is turned to the 2ND position and placed in LOW (ªBº) position, power is supplied
Ifrom terminal 7 of each headlamp relay
Ito terminal 3 of each headlamp
Ground is supplied
Ito terminal 4 of each headlamp
Ithrough body grounds E13 and E41.
With power and ground supplied, the headlamp(s) will illuminate.
HIGH BEAM OPERATION/FLASH-TO-PASS OPERATIONNBEL0188S03When the lighting switch is turned to the 2ND position and placed in HIGH (ªAº) position or PASS (ªCº) position,
power is supplied
Ifrom terminal 5 of headlamp LH relay
Ito terminal 1 of headlamp LH, and
Ito combination meter terminal 26 for the HIGH BEAM indicator
Ifrom terminal 5 of headlamp RH relay
Ito terminal 1 of headlamp RH.
Ground is supplied
Ito headlamp LH terminal 2
Ito combination meter terminal 27 for the HIGH BEAM indicator
Ithrough lighting switch terminals 6 and 5
Ithrough body grounds E13 and E41, and
Ito headlamp RH terminal 2
Ithrough lighting switch terminals 9 and 8
Ithrough body grounds E13 and E41.
With power and ground supplied, the high beams and the high beam indicator illuminate.
BATTERY SAVER CONTROLNBEL0188S04When the ignition switch is turned from ON (or START) to OFF (or ACC) positions while headlamps illuminate,
the RAP signal is supplied to terminal 10 of the headlamp battery saver control unit from smart entrance con-
trol unit terminal 5.
After counting 45 seconds by the RAP signal from the smart entrance control unit to headlamp battery saver
control unit, the ground supply to terminal 2 of the headlamp LH and RH relay from headlamp battery saver
control unit terminals 2 and 8 is terminated.
Then the headlamps are turned off.
The headlamps are turned off when driver or passenger side door is opened even if 45 seconds have not
passed after ignition switch is turned from ON (or START) to OFF (or ACC) positions while headlamps are
illuminated.
When the lighting switch is turned from OFF to 2ND after headlamps are turned to off by the battery saver
control, ground is supplied
HEADLAMP (FOR USA) Ð XENON TYPE Ð
System Description (Cont'd)
EL-32

Ito headlamp battery saver control unit terminals 5 and 13 from lighting switch terminal 11, and
Ito headlamp LH and RH relays terminal 2 from headlamp battery saver control unit terminals 2 and 8
Ithrough headlamp battery saver control unit terminals 3 and 9, and
Ithrough lighting switch terminal 12.
Then headlamps illuminate again.
AUTO LIGHT OPERATIONNBEL0188S05When lighting switch is in ªAUTOº position, ground is supplied
Ito auto light control unit terminal 10
Ifrom lighting switch terminal 42.
When ignition switch is turn to ªONº or ªSTARTº position and outside brightness is darker than prescribed level.
Ground is supplied
Ito headlamp relay LH and RH terminals 2
Ithrough battery saver control unit
Ifrom auto light control unit terminal 6, and
Ito tail lamp relay terminal 1
Ithrough battery saver control unit
Ifrom auto light control unit terminal 7.
Then both headlamp relays and tail lamp relay are energized, headlamps (low or high) and tail lamps are illu-
minate according to switch position.
Auto light operation allows headlamps and tail lamps to go off when
IIgnition switch is turned to ªOFFº position or
IOutside brightness is brighter than prescribed level.
NOTE:
The delay time is varies up to maximum of 20 seconds as the outside brightness changes.
For parking, license and tail lamp auto operation, refer to ªPARKING, LICENSE AND TAIL LAMPSº.
THEFT WARNING SYSTEMNBEL0188S06The theft warning system will flash the low beams if the system is triggered. Refer to ªTHEFT WARNING
SYSTEMº (EL-296).
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HEADLAMP (FOR USA) Ð XENON TYPE Ð
System Description (Cont'd)
EL-33

XENON HEADLAMP=NBEL0188S07Xenon type headlamp is adopted to the low beam headlamps. Xenon bulbs do not use a filament. Instead,
they produce light when a high voltage current is passed between two tungsten electrodes through a mixture
of xenon (an inert gas) and certain other metal halides. In addition to added lighting power, electronic control
of the power supply gives the headlamps stable quality and tone color.
Following are some of the many advantage of the xenon type headlamp.
IThe light produced by the headlamps is white color approximating sunlight that is easy on the eyes.
ILight output is nearly double that of halogen headlamps, affording increased area of illumination.
IThe light features a high relative spectral distribution at wavelengths to the human eye is most sensitive,
which means that even in the rain, more light is reflected back from the road surface toward the vehicle,
for added visibility.
IPower consumption is approximately 25 percent less than halogen headlamps, reducing battery load.
SEL571X
HEADLAMP (FOR USA) Ð XENON TYPE Ð
System Description (Cont'd)
EL-34