2001 INFINITI QX4 lock

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

Component Connector No. Power terminal Ground terminal
IVCS switch R10 2 12
Display & NAVI control unit M117, M118 8 24
A/C auto amp. M102 24 25
Clock M39 3 4
Globe box lamp M30 1 2
The ground for all of the components except for compass, glove box lamp and ashtray are controlled through
terminals 2 and 3 of the illumination control switch and body grounds M77 and M111.
BATTERY SAVER CONTROLNBEL0035S02When the ignition switch is turned from ON (or START) to OFF (or ACC) positions while illumination lamps
are illuminated, the RAP signal is supplied to terminal 10 of the headlamp battery saver control unit from smart
entrance control 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 1 of the tail lamp relay from headlamp battery saver control unit
teminals 6 and 14 is terminated.
Then illumination lamps are turned off.
Illumination lamps are turned off when driver or passenger side door is opened even if 45 seconds have not
passed after the ignition switch is turned from ON (or START) to OFF (or ACC) positions while illumination
lamps are illuminated.
When the lighting switch is turned from OFF to 1ST (or 2ND) after illumination lamps are turned off by the
battery saver control, ground is supplied
Ito headlamp battery saver control unit terminals 5 and 13 from lighting switch terminal 11, and
Ito tail lamp relay terminal 1 from headlamp battery saver control unit terminals 6 and 14.
Then illumination lamps illuminate again.
NOTE:
For Trouble Diagnoses for battery saver control, refer to ªPARKING, LICENSE AND TAIL LAMPSº
(EL-66).
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
ILLUMINATION
System Description (Cont'd)
EL-81

System DescriptionNBEL0038POWER SUPPLY AND GROUNDNBEL0038S06Power is supplied at all times:
Ithrough 7.5A fuse [No. 24, located in the fuse block (J/B)]
Ito key switch terminal 2 and
Ito smart entrance control unit terminal 10.
When the key is removed from ignition key cylinder, power is interrupted:
Ithrough key switch terminal 1
Ito smart entrance control unit terminal 32.
With the ignition key switch in the ON or START position, power is supplied:
Ithrough 7.5A fuse [No. 11, located in the fuse block (J/B)]
Ito smart entrance control unit terminal 33.
Ground is supplied:
Ito smart entrance control unit terminal 16
Ithrough body grounds terminals M77 and M111.
When the front driver side door is opened, ground is supplied:
Ithrough body grounds B11, B22 and D210
Ito front door switch (LH) terminal 2
Ifrom front door switch (LH) terminal 1
Ito smart entrance control unit terminal 29.
When the front passenger side door is opened, ground is supplied:
Ithrough case ground of front door switch (RH)
Ifrom front door switch (RH) terminal 1
Ito smart entrance control unit terminal 40.
When any other door (except front door) is opened, ground is supplied to smart entrance control unit termi-
nal 28 in the same manner as the front door switch (front passenger side).
When the front driver side door is unlocked, the smart entrance control unit receives a ground signal:
Ithrough body grounds terminals M77 and M111
Ito front door lock actuator (driver side unlock sensor) terminal 2
Ifrom front door lock actuator (driver side unlock sensor) terminal 4
Ito smart entrance control unit terminal 36.
When a signal, or combination of signals is received by the smart entrance control unit, ground is supplied:
Ithrough smart entrance control unit terminal 8
Ito interior lamp terminal 2.
With power and ground supplied, the interior lamp illuminates.
SWITCH OPERATIONNBEL0038S07When interior lamp switch is ON, ground is supplied:
Ithrough case grounds of interior lamp
Ito interior lamp.
And power is supplied:
Ito interior lamp terminal 1
Ifrom smart entrance control unit terminal 17.
When spot lamp (LH and/or RH) is ON, ground is supplied:
Ithrough body grounds M4, M66 and M147
Ito spot lamp terminal 2.
And power is supplied:
Ito spot lamp terminal 1
Ifrom smart entrance control unit terminal 17.
When vanity mirror illumination (LH and/or RH) is ON, ground is supplied:
Ithrough body grounds M4, M66 and M147
Ito vanity mirror illuminations (LH and RH) terminals 2.
INTERIOR, SPOT, VANITY MIRROR AND LUGGAGE ROOM LAMPS
System Description
EL-88

And power is supplied:
Ito vanity mirror illuminations (LH and RH) terminals 1
Ifrom smart entrance control unit terminal 17.
With power and ground supplied, interior lamps turn ON.
INTERIOR LAMP TIMER OPERATIONNBEL0038S08When interior lamp switch is in the ªDOORº position, the smart entrance control unit keeps the interior lamp
illuminated for about 30 seconds when:
Iunlock signal is supplied from driver's door unlock sensor while all doors are closed and key is removed
from ignition key cylinder
Iunlock signal is supplied from multi-remote controller while all doors are closed and driver's door is locked
Ikey is removed from ignition key cylinder while all doors are closed
Idriver's door is opened and then closed while key is removed from the iginition key cylinder. (However, if
the driver's door is closed with the key insered in the ignition key cylinder after the driver's door is opened
with the key removed, the timer is operated.)
The timer is canceled when:
Idriver's door is locked,
Idriver's door is opened, or
Iignition switch is turned ON.
ON-OFF CONTROLNBEL0038S09When the driver side door, front passenger door, rear LH, RH door or back door is opened, the interior room
lamp turns on while the interior room lamp switch is in the ªDOORº position.
BATTERY SAVERNBEL0038S10The lamp turns off automatically when interior lamp, luggage room lamp, spot lamp and/or vanity mirror illu-
mination is illuminated with the ignition key is in OFF position, if the lamp remains lit by the door switch open
signal or if the lamp switch is in ON position for more than 10 minutes.
After lamps turn OFF by the battery saver system, the lamps illuminate again when:
Idriver's door is locked or unlocked,
Idoor is opened or closed,
Ikey is inserted or removed in ignition key cylinder.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
INTERIOR, SPOT, VANITY MIRROR AND LUGGAGE ROOM LAMPS
System Description (Cont'd)
EL-89

POWER SUPPLY AND GROUND CIRCUITNBEL0042S08Power is supplied at all times
Ithrough 7.5A fuse [No. 24, located in the fuse block (J/B)]
Ito combination meter terminal 62.
With the ignition switch in the ON or START position, power is supplied
Ithrough 10A fuse [No. 8, located in the fuse block (J/B)]
Ito combination meter terminal 66.
Ground is supplied
Ito combination meter terminal 59
Ithrough body grounds M4, M66 and M147.
WATER TEMPERATURE GAUGENBEL0042S01The water temperature gauge indicates the engine coolant temperature. The reading on the gauge is based
on the resistance of the thermal transmitter.
As the temperature of the coolant increases, the resistance of the thermal transmitter decreases. A variable
ground is supplied to terminal 18 of the combination meter for the water temperature gauge. The needle on
the gauge moves from ªCº to ªHº.
TACHOMETERNBEL0042S02The tachometer indicates engine speed in revolutions per minute (rpm).
The tachometer is regulated by a signal
Ifrom terminal 25 of the ECM
Ito combination meter terminal 16 for the tachometer.
FUEL GAUGENBEL0042S03The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by a variable ground signal supplied
Ito combination meter terminal 17 for the fuel gauge
Ifrom terminal 3 of the fuel level sensor unit
Ithrough terminal 2 of the fuel level sensor unit and
Ithrough body grounds B11, B22 and D210.
SPEEDOMETERNBEL0042S04The vehicle speed sensor provides a voltage signal to the combination meter for the speedometer.
The voltage is supplied
Ifrom combination meter terminal 15 for the speedometer
Ito terminal 2 of the vehicle speed sensor.
The speedometer converts the voltage into the vehicle speed displayed.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
METERS AND GAUGES
System Description (Cont'd)
EL-95

SEL179WB
POWER SUPPLY AND GROUND CIRCUIT CHECK=NBEL0201S03Power Supply Circuit CheckNBEL0201S0301
Terminals Ignition switch position
(+) (þ) OFF ACC ON
62 GroundBattery
voltageBattery
voltageBattery
voltage
66 Ground 0V 0VBattery
voltage
If NG, check the following.
I10A fuse [No. 12, located in fuse block (J/B)]
I10A fuse [No. 30, located in fuse block (J/B)]
IHarness for open or short between fuse and combination
meter
SEL180WA
Ground Circuit CheckNBEL0201S0302
Terminals Continuity
59 - Ground Yes
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
METERS AND GAUGES
Trouble Diagnoses (Cont'd)
EL-103

Trouble DiagnosesNBEL0048PRELIMINARY CHECK FOR THERMOMETERNBEL0048S02
1 COOL DOWN CHECK
1. Turn the ignition key switch to the ªACCº position.
2. Cool down the ambient air temperature sensor with water or ice, so that the indicated temperature falls.
Does the indicated temperature fall?
Ye s©GO TO 2.
No©The system is malfunctioning. Check the system following ªINSPECTION/COMPASS
AND THERMOMETERº.
2 WARM UP CHECK
1. Leave the vehicle for 10 minutes, so that the indicated temperature rises.
2. With the ignition key in the ªACCº position, disconnect and reconnect the ambient air temperature sensor connector.
Does the indicated temperature rise?
Ye s©The system is OK.
No©The system is malfunctioning. Check the system following ªINSPECTION/COMPASS
AND THERMOMETERº.
NOTE:
IWhen the outside temperature is between 55ÉC (130ÉF) and 70ÉC (158ÉF), the display shows 55ÉC
(130ÉF). When the outside temperature is lower than þ30ÉC (þ20ÉF) or higher than 70ÉC (158ÉF), the dis-
play shows only ª---º.
IThe indicated temperature on the thermometer is not readily affected by engine heat. It changes only when
one of the following conditions is present.
a) The temperature detected by the ambient air temperature sensor is lower than the indicated temperature
on the thermometer.
b) The difference in temperature detected during a period of 40 seconds is less than 1ÉC (1.8ÉF) when vehicle
speed has been greater than 24 km/h (15 MPH) for more than 100 seconds.
(This is to prevent the indicated temperature from being affected by engine heat or cooling fan operation
during low-speed driving.)
c) The ignition key has been turned to the ªOFFº position for more than 4 hours. (The engine is cold.)
INSPECTION/COMPASS AND THERMOMETERNBEL0048S01
Symptom Possible causes Repair order
No display at all 1. 10A fuse
2. Ground circuit
3. Compass and thermometer1. Check 10A fuse [No. 9, located in fuse block (J/B)].
Turn the ignition switch ON and verify that battery positive
voltage is at terminal 7 of compass and thermometer.
2. Check ground circuit for compass and thermometer.
3. Replace compass and thermometer.
Forward direction indi-
cation slips off the
mark or incorrect.1. In manual correction mode (Bar
and display vanish.)
2. Zone variation change is not done.1. Drive the vehicle and turn at an angle of 90É.
2. Perform the zone variation change.
Compass reading
remains unchanged.1. Vehicle speed sensor is not
entered.
2. Compass and thermometer1. Check harness for open or short between combination meter
terminal 13 and compass and thermometer terminal 1.
2. Replace compass and thermometer.
Displays wrong tem-
perature when ambient
temperature is between
þ30ÉC (þ20ÉF) and
55ÉC (130ÉF). (See
NOTE above.)1. Check operation
2. Ambient air temperature sensor
circuit
3. Vehicle speed sensor is not
entered.
4. Ambient air temperature sensor
5. Compass and thermometer1. Perform preliminary check shown above.
2. Check harness for open or short between ambient air tem-
perature sensor and compass and thermometer.
3. Check harness for open or short between combination meter
terminal 13 and compass and thermometer terminal 1.
4. Replace ambient air temperature sensor.
5. Replace compass and thermometer.
COMPASS AND THERMOMETER
Trouble Diagnoses
EL-112

Component Parts and Harness Connector
Location
NBEL0052
SEL046W
System DescriptionNBEL0053The warning chime is controlled by the smart entrance control unit.
The warning chime is located in the smart entrance control unit.
Power is supplied at all times
Ithrough 7.5A fuse [No. 24, located in the fuse block (J/B)]
Ito smart entrance control unit terminal 10, and
Ito key switch terminal 2, and
Ithrough 10A fuse [No. 61, located in the fuse block (J/B)]
Ito tail lamp relay terminals 2 and 3.
With the ignition switch in the ON or START position, power is supplied
Ithrough 7.5A fuse [No. 11, located in the fuse block (J/B)]
Ito smart entrance control unit terminal 33.
Ground is supplied to smart entrance control unit terminal 16 through body grounds M77 and M111.
IGNITION KEY WARNING CHIMENBEL0053S01With the key in the ignition switch in the OFF or ACC position, and the driver's door open, the warning chime
will sound. Power is supplied
Ifrom key switch terminal 1
Ito smart entrance control unit terminal 32.
Ground is supplied
Ifrom front door switch LH terminal 1
Ito smart entrance control unit terminal 29.
Front door switch LH terminal 2 is grounded through body grounds B11, B22 and D210.
LIGHT WARNING CHIMENBEL0053S02With ignition switch OFF or ACC, driver's door open, warning chime will sound. [Except when headlamp bat-
tery saver control operates (for 45 seconds after ignition switch is turned to OFF or ACC position) and head-
lamps do not illuminate.] Power is supplied.
Ifrom tail lamp relay terminal 5
Ito smart entrance control unit terminal 34.
Ground is supplied
Ifrom front door switch LH terminal 1
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
WARNING CHIME
Component Parts and Harness Connector Location
EL-125