2001 INFINITI QX4 key

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.
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INTERIOR, SPOT, VANITY MIRROR AND LUGGAGE ROOM LAMPS
System Description (Cont'd)
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System DescriptionNBEL0153
SEL713U
This unit displays following items:
IEarth magnetism and heading direction of vehicle.
IOutside air temperature.
ICaution for frozen road surfaces.
OUTSIDE TEMPERATURE DISPLAYNBEL0153S01Push the switch when the ignition key is in the ªACCº or ªONº position. The outside temperature will be dis-
played in ªÉFº.
ISelecting the indication range
Push the switch to change from ªÉFº to ªÉCº.
IWhen the outside temperature drops below freezing point, ICE is displayed on the unit.
IWhen the outside temperature is between 55ÉC (130ÉF) and 70ÉC (158ÉF), the display shows 55ÉC
(130ÉF).
IWhen the outside temperature is lower than þ30ÉC (þ20ÉF) or higher than 70ÉC (158ÉF), the display shows
only ª---º though it is operating. This is not a problem.
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.)
DIRECTION DISPLAYNBEL0153S02Push the switch when the ignition key is in the ªACCº or ªONº position. The direction will be displayed.
COMPASS AND THERMOMETER
System Description
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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
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WARNING CHIME
Component Parts and Harness Connector Location
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Trouble DiagnosesNBEL0055SYMPTOM CHARTNBEL0055S01
REFERENCE PAGE (EL- ) 129 131 133 134 135
SYMPTOM
POWER SUPPLY AND GROUND CIRCUIT CHECK
LIGHTING SWITCH INPUT SIGNAL CHECK
KEY SWITCH (INSERT) CHECK
SEAT BELT BUCKLE SWITCH CHECK
DRIVER SIDE DOOR SWITCH CHECK
Light warning chime does not acti-
vate.XX X
Ignition key warning chime does not
activate.XXX
Seat belt warning chime does not
activate.XX
All warning chimes do not activate. X
SEL301X
POWER SUPPLY AND GROUND CIRCUIT CHECKNBEL0055S02Power Supply Circuit CheckNBEL0055S0201
Terminals Ignition switch position
(+) (þ) OFF ACC ON
10 GroundBattery
voltageBattery
voltageBattery
voltage
33 Ground 0V 0VBattery
voltage
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WARNING CHIME
Trouble Diagnoses
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KEY SWITCH (INSERT) CHECK=NBEL0055S04
1 CHECK KEY SWITCH INPUT SIGNAL
Check voltage between smart entrance control unit terminal 32 and ground.
SEL307X
OK or NG
OK©Key switch is OK.
NG©GO TO 2.
2 CHECK KEY SWITCH (INSERT)
Check continuity between terminals 1 and 2.
SEL308X
OK or NG
OK©Check the following.
I7.5A fuse [No. 24, located in fuse block (J/B)]
IHarness for open or short between key switch and fuse
IHarness for open or short between smart entrance control unit and key switch
NG©Replace key switch.
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WARNING CHIME
Trouble Diagnoses (Cont'd)
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Ito rear wiper motor terminal 4.
Ground is supplied
Ito rear wiper motor terminal 3
Ithrough rear wiper amp. terminal 8.
With power and ground supplied, rear wiper operates at low speed intermittent.
WIPER OPERATION PROHIBIT CONTROLNBEL0063S03When glass hatch is open with back door key cylinder while rear wiper is operated, wiper operation is stopped.
(Wiper operation prohibit control)
When glass hatch is closed and rear wiper switch turns from OFF and then rear wiper switch is turned to ON,
wiper operation prohibit control is canceled.
WASHER OPERATIONNBEL0063S02When the rear wiper switch is turned to WASH position, ground is supplied
Ito rear wiper amp. terminal 1
Ithrough terminals 23 and 24
Ithrough body grounds E13 and E41.
Then, power is supplied
Ithrough rear wiper amp. terminal 7
Ito rear washer motor terminal 2.
Ground is supplied
Ito rear washer motor terminal 1
Ithrough body grounds E13 and E41.
With power and ground supplied, the rear washer motor operates.
When the rear wiper switch is turned to WASH position for one second or more, the rear wiper motor oper-
ates at low speed for approximately 3 seconds after the rear wiper switch is released. This feature is controlled
by the rear wiper amp. in the same manner as the low speed operation.
REAR WIPER AND WASHER
System Description (Cont'd)
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