lock INFINITI QX4 2001 Factory Service Manual

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

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.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
WARNING CHIME
Trouble Diagnoses (Cont'd)
EL-133

System DescriptionNBEL0057WIPER OPERATIONNBEL0057S01The front wiper switch is controlled by a lever built into the combination switch.
There are three wiper switch positions:
ILO speed
IHI speed
IINT (Intermittent)
With the ignition switch in the ACC or ON position, power is supplied
Ithrough 20A fuse [No. 19, located in the fuse block (J/B)]
Ito front wiper motor terminal 4, and
Ito front wiper switch terminal 15.
Low and High Speed Wiper OperationNBEL0057S0101Ground is supplied to front wiper switch terminal 17 through body grounds E13 and E41.
When the wiper switch is placed in the LO position, ground is supplied
Ithrough terminal 14 of the front wiper switch
Ito front wiper motor terminal 3.
With power and ground supplied, the front wiper motor operates at low speed.
When the front wiper switch is placed in the HI position, ground is supplied
Ithrough terminal 16 of the front wiper switch
Ito front wiper motor terminal 1.
With power and ground supplied, the front wiper motor operates at high speed.
Auto Stop OperationNBEL0057S0102With front wiper switch turned OFF, front wiper motor will continue to operate until wiper arms reach windshield
base.
When wiper arms are not located at base of windshield with front wiper switch OFF, ground is provided
Ifrom terminal 14 of the front wiper switch
Ito front wiper motor terminal 3, in order to continue front wiper motor operation at low speed.
Ground is also supplied
Ito terminal 13 of the front wiper switch
Ithrough front wiper motor terminal 2
Ithrough terminal 6 of the front wiper motor, and
Ithrough body grounds M77 and M111.
When wiper arms reach base of windshield, front wiper motor terminals 2 and 4 are connected instead of ter-
minals 2 and 6. Wiper motor will then stop wiper arms at the PARK position.
Intermittent OperationNBEL0057S0103The front wiper motor operates the wiper arms one time at low speed at a set interval of approximately 2 to
13 seconds. This feature is controlled by the wiper amplifier built in the front wiper switch.
When the front wiper switch is placed in the INT position, ground is supplied
Ito wiper amplifier (INT SW)
Ifrom wiper switch terminal 17
Ithrough body grounds E13 and E41, and
Ito wiper motor terminal 3
Ithrough the wiper switch terminal 14
Ithrough wiper amplifier (OUTPUT)
WASHER OPERATIONNBEL0057S02With the ignition switch in the ACC or ON position, power is supplied
Ithrough 20A fuse [No. 19, located in the fuse block (J/B)]
Ito washer motor terminal 1.
When the lever is pulled to the WASH position, ground is supplied
Ito washer motor terminal 2
Ithrough terminal 18 of the wiper switch
FRONT WIPER AND WASHER
System Description
EL-136

System DescriptionNBEL0063WIPER OPERATIONNBEL0063S01Power Supply and GroundNBEL0063S0101With ignition switch in the ACC or ON position, power is supplied
Ithrough 10A fuse [No. 29, located in the fuse block (J/B)]
Ito rear wiper amp. terminal 6.
When the glass hatch switch is OPEN, ground is supplied
Ito rear wiper amp. terminal 3
Ithrough glass hatch switch terminal 1 and 2
Ithrough body grounds B11, B22 and D210.
Ground is supplied
Ito rear wiper amp. terminal 9
Ithrough body grounds B11, B22 and D210.
Low Speed Wiper OperationNBEL0063S0103When the rear wiper switch is turned ON, ground is supplied
Ito rear wiper amp. terminal 2
Ithrough combination switch terminals 22 and 24.
Ithrough body grounds E13 and E41
Then, power is supplied
Ithrough rear wiper amp. terminal 11
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, the wiper motor operates at low speed.
Auto Stop OperationNBEL0063S0104With rear wiper switch turned OFF, rear wiper motor will continue to operate until wiper arm reaches rear wiper
stopper.
When rear wiper arm is not located at rear wiper stopper with wiper switch OFF, ground is supplied
Ito rear wiper amp. terminal 10
Ithrough wiper motor terminals 7 and 8
Ithrough body grounds B11, B22 and D210.
Then rear wiper motor continues to operate until wiper arm reaches bottom.
When wiper arm reaches bottom, power is supplied
Ithrough 10A fuse [No. 29, located in the fuse block (J/B)]
Ithrough rear wiper motor terminals 6 and 7 and
Ithrough rear wiper amp. terminals 10 and 8
Ito rear wiper motor terminal 3.
Ground is supplied
Ito rear wiper motor 4
Ithrough rear wiper amp. terminal 11.
Then wiper motor turns the other way and wiper arm moves once until wiper arm reaches stopper.
Intermittent OperationNBEL0063S0105The rear wiper motor operates the wiper arms at low speed approximately every 7 seconds. This feature is
controlled by the wiper amp.
When the wiper switch is placed in the INT position, ground is supplied
Ito wiper amp. terminal 4
Ithrough rear combination switch terminal 21 and 24
Ithrough body grounds E13 and E41.
Then, power is supplied
Ithrough rear wiper amp. terminal 11
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
REAR WIPER AND WASHER
System Description
EL-141

Wiring Diagram Ð CLOCK ÐNBEL0204
MEL814L
CLOCK
Wiring Diagram Ð CLOCK Ð
EL-150

Component Parts and Harness Connector
Location
NBEL0072
SEL465X
System DescriptionNBEL0073The rear window defogger system is controlled by the smart entrance control unit. The rear window defogger
operates only for approximately 15 minutes.
Power is supplied at all times
Ito rear window defogger relay terminal 3
Ithrough 20A fuse (No. 56, located in the fuse and fusible link box) and
Ito rear window defogger relay terminal 6
Ithrough 20A fuse (No. 57, located in the fuse and fusible link box)
Ito smart entrance control unit terminal 10
Ithrough 7.5A [No. 24, located in fuse block (J/B)]
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 the rear window defogger relay terminal 1, and
Ito smart entrance control unit terminal 33.
Ground is supplied
Ito terminal 1 of the rear window defogger switch
Ithrough body grounds M4, M66 and M147(with navigation system),
Ito terminal 32 of the A/C auto amp.
Ithrough body grounds M4, M66 and M147 (without navigation system), or
Ito smart entrance control unit terminal 16
Ithrough body grounds M77 and M111.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
REAR WINDOW DEFOGGER
Component Parts and Harness Connector Location
EL-151

Trouble DiagnosesNBEL0075DIAGNOSTIC PROCEDURENBEL0075S01SYMPTOM: Rear window defogger does not activate, or does
not go off after activating.
1 CHECK REAR WINDOW DEFOGGER OUTPUT SIGNAL
1. Turn ignition switch to ON position.
2. Check voltage between smart entrance control unit harness terminal 2 and ground.
SEL384X
OK or NG
OK©Check the following.
IRear window defogger relay
(Refer to EL-157.)
IRear window defogger circuit
IRear window defogger filament
(Refer to EL-157.)
NG©GO TO 2.
2 CHECK DEFOGGER RELAY COIL SIDE CIRCUIT
1. Disconnect smart entrance control unit connector.
2. Turn ignition switch to ON position.
3. Check voltage between smart entrance control unit terminal 2 and ground.
SEL385X
OK or NG
OK©GO TO 3.
NG©Check the following.
I7.5A fuse [No. 11, located in the fuse block (J/B)]
IRear window defogger relay
IHarness for open or short between rear window defogger relay and smart entrance
control unit
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
REAR WINDOW DEFOGGER
Trouble Diagnoses
EL-155

3 CHECK REAR WINDOW DEFOGGER SWITCH INPUT SIGNAL
Check continuity between smart entrance control unit terminal 39 and ground.
SEL386X
OK or NG
OK©GO TO 4.
NG©Check the following.
IRear window defogger switch (with navigation system)
(Refer to EL-157.)
IA/C auto amp. (without navigation system)
IHarness for open or short between smart entrance control unit and rear window defog-
ger switch (with navigation system) or A/C auto amp. (without navigation system)
IRear window defogger switch (with navigation system) or A/C auto amp. (without navi-
gation system) ground circuit
4 CHECK IGNITION INPUT SIGNAL
Check voltage between smart entrance control unit terminal 33 and ground.
SEL387X
OK or NG
OK©GO TO 5.
NG©Check the following.
I7.5A fuse [No. 11, located in the fuse block (J/B)]
IHarness for open or short between smart entrance control unit and fuse
REAR WINDOW DEFOGGER
Trouble Diagnoses (Cont'd)
EL-156

System DescriptionNBEL0079Refer to Owner's Manual for audio system operating instructions.
Power is supplied at all times
Ithrough 15A fuse [No. 4, located in the fuse block (J/B)]
Ito audio unit terminal 6,
Ito audio amp. relay terminal 3 and
Ito rear speaker amp. terminal 11.
With the ignition switch in the ACC or ON position, power is supplied
Ithrough 10A fuse [No. 10, located in the fuse block (J/B)]
Ito audio unit terminal 10.
Ground is supplied through the case of the audio unit.
Ground is supplied
Ito audio amp. relay terminal 2
Ithrough body grounds M4, M66 and M147
Ito front door speaker LH terminal 5 and
Ito front door speaker RH terminal 5
Ithrough body grounds M77 and M111
Ito rear speaker amp. terminal 24
Ithrough body grounds B11, B22 and D210.
When the audio unit POWER button is pressed, power is supplied
Ito rear speaker amp. terminal 9 and
Ito audio amp. relay terminal 1
Ifrom audio unit terminal 12.
Then audio amp. relay is energized and power is supplied
Ito front door speaker LH terminal 4 and
Ito front door speaker RH terminal 4.
Audio signals are supplied
Ithrough audio unit terminals 1, 2, 3, 4, 13, 14, 15 and 16
Ito terminals 2 and 6 of the LH and RH front speakers and terminals 5, 7, 18 and 20 of the rear speaker
amp.
Ito LH and RH tweeters through terminals 1 and 3 of the front speakers
Ito rear LH and RH speakers through terminals 1, 2, 25 and 26 of the rear speaker amp.
AUDIO
System Description
EL-160