2001 INFINITI QX4 ignition

Ito smart entrance control unit terminal 29.
Front door switch LH terminal 2 is grounded through body grounds B11, B22 and D210.
SEAT BELT WARNING CHIMENBEL0053S03With ignition switch turned ON and seat belt unfastened (seat belt switch ON), warning chime will sound for
approximately 6 seconds.
Ground is supplied
Ifrom seat belt switch terminal 1
Ito smart entrance control unit terminal 22.
Seat belt switch terminal 2 is grounded through body grounds B11, B22 and D210.
WARNING CHIME
System Description (Cont'd)
EL-126

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
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
WARNING CHIME
Trouble Diagnoses
EL-129

SEAT BELT BUCKLE SWITCH CHECK=NBEL0055S05
1 CHECK SEAT BELT BUCKLE SWITCH INPUT SIGNAL
1. Turn ignition switch ªONº.
2. Check voltage between smart entrance control unit terminal 22 and ground.
SEL380X
OK or NG
OK©Seat belt buckle switch is OK.
NG©GO TO 2.
2 CHECK SEAT BELT BUCKLE SWITCH
Check continuity between terminals 1 and 2 when seat belt is fastened and unfastened.
SEL381X
OK or NG
OK©Check the following.
ISeat belt buckle switch ground circuit
IHarness for open or short between smart entrance control unit and seat belt buckle
switch
NG©Replace seat belt buckle switch.
WARNING CHIME
Trouble Diagnoses (Cont'd)
EL-134

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

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