2001 INFINITI QX4 relay

Component Parts and Harness Connector
Location
NBEL0111
SEL355X
System DescriptionNBEL0112INPUTSNBEL0112S01Power is supplied at all times
Ito smart entrance control unit terminal 11
Ithrough circuit breaker
Ithrough 40A fusible link (letterflocated in the fuse and fusible link box),
Ito key switch terminal 2, and
Ito smart entrance control unit terminal 10
Ithrough 7.5A fuse [No. 24, located in the fuse block (J/B)].
Ito multi-remote control relay terminals 1, 3 and 6
Ithrough 15A fuse [No. 20, located in the fuse block (J/B)].
Ito horn relay terminals 1 and 3
Ithrough 7.5A fuse [No. 52, located in the fuse block (J/B)].
Ito horn relay terminal 6
Ithrough 10A fuse [No. 54, located in the fuse block (J/B)].
When the ignition switch is in the ACC or ON position, power is supplied to smart entrance control unit termi-
nal 21.
When the key switch is ON (ignition key is inserted in key cylinder), power is supplied
Ithrough key switch terminal 1
Ito smart entrance control unit terminal 32.
MULTI-REMOTE CONTROL SYSTEM
Component Parts and Harness Connector Location
EL-270

When the front door switch LH is OPEN, ground is supplied
Ito smart entrance control unit terminal 29
Ithrough front door switch LH terminal 1
Ito front door switch LH terminal 2
Ithrough body grounds B11, B22 and D210.
When the front door switch RH is OPEN, ground is supplied
Ito smart entrance control unit terminal 40
Ithrough front door switch RH body ground.
When the other door switches are OPEN, ground is supplied
Ito smart entrance control unit terminal 28
Ithrough other door switches body grounds.
Remote controller signal is inputted to smart entrance control unit (The antenna of the system is combined
with smart entrance control unit).
OPERATIONNBEL0112S03The multi-remote control system controls operation of the
Ipower door lock
Iinterior lamp
Ipanic alarm
Ihazard and horn reminder
OPERATED PROCEDURENBEL0112S02Power Door Lock OperationNBEL0112S0201Smart entrance control unit receives a LOCK signal from remote controller. Smart entrance control unit locks
all doors with input of LOCK signal from remote controller.
When an UNLOCK signal is sent from remote controller once, driver's door will be unlocked.
Then, if an UNLOCK signal is sent from remote controller again within 5 seconds, all other door will be
unlocked.
Hazard and Horn ReminderNBEL0112S0204When smart entrance control unit receives LOCK or UNLOCK signal from remote controller with all doors
closed, ground is supplied
Ito multi-remote control relay terminal 2
Ithrough smart entrance control unit terminal 7, and
Ito horn relay terminal 2
Ithrough smart entrance control unit terminal 19
Multi-remote control relay and horn relay are now energized, and hazard warning lamp flashes and horn
sounds as a reminder.
The hazard and horn reminder has a horn chirp mode (C mode) and a non-horn chirp mode (S mode).
Operating function of hazard and horn reminder
Horn chirp mode (C mode) Non-horn chirp mode (S mode)
Hazard warning lamp
flashHorn soundHazard warning lamp
flashHorn sound
Lock Twice Once Twice Ð
Unlock Once Ð Ð Ð
How to change hazard and horn reminder mode
When LOCK and UNLOCK signals are sent from the remote controller for more than 2 seconds at the same
time, the hazard and horn reminder mode is changed and hazard warning lamp flashes and horn sounds as
follows:
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MULTI-REMOTE CONTROL SYSTEM
System Description (Cont'd)
EL-271

HAZARD REMINDER CHECK=NBEL0115S08
1 CHECK HAZARD INDICATOR
Check if hazard indicator flashes with hazard switch.
Does hazard indicator operate?
Ye s©GO TO 2.
No©Check ªhazard indicatorº circuit.
2 CHECK HAZARD REMINDER OPERATION
1. Disconnect smart entrance control unit connector.
2. Apply ground to control unit terminal 7.
SEL325X
Refer to wiring diagram in EL-276.
OK or NG
OK©Replace smart entrance control unit.
NG©GO TO 3.
3 CHECK MULTI-REMOTE CONTROL RELAY
Check multi-remote control relay.
OK or NG
OK©GO TO 4.
NG©Replace.
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MULTI-REMOTE CONTROL SYSTEM
Trouble Diagnoses (Cont'd)
EL-285

4 CHECK POWER SUPPLY FOR MULTI-REMOTE CONTROL RELAY
1. Disconnect multi-remote control relay connector.
2. Check voltage between terminal 1 and ground.
SEL326X
OK or NG
OK©GO TO 5.
NG©Check the following.
I15A fuse [No. 20, located in fuse block (J/B)]
IHarness for open or short between multi-remote control relay and fuse
5 CHECK MULTI-REMOTE CONTROL RELAY CIRCUIT
1. Disconnect multi-remote control relay connector.
2. Check voltage between terminals 3 and 5.
3. Check voltage between terminals 6 and 7.
SEL327X
OK or NG
OK©Check harness for open or short between smart entrance control unit and multi-remote
control relay.
NG©Check the following.
IHarness for open or short between multi-remote control relay and fuse
IHarness for open or short between multi-remote control relay and turn signal lamps
MULTI-REMOTE CONTROL SYSTEM
Trouble Diagnoses (Cont'd)
EL-286

HORN REMINDER CHECK=NBEL0115S11
1 CHECK HORN
Check if horn sounds with horn switch.
Does horn operate?
Ye s©GO TO 2.
No©Check horn circuit.
2 CHECK HORN REMINDER OPERATION
1. Disconnect smart entrance control unit connector.
2. Apply ground to smart entrance control unit terminal 19.
SEL328X
Refer to wiring diagram in EL-276.
OK or NG
OK©Replace smart entrance control unit.
NG©Check harness for open or short between smart entrance control unit and horn relay.
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MULTI-REMOTE CONTROL SYSTEM
Trouble Diagnoses (Cont'd)
EL-287

Ito smart entrance control unit terminal 33.
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 smart entrance control unit terminal 21.
Ground is supplied
Ito smart entrance control unit terminal 16
Ithrough body grounds M77 and M111.
INITIAL CONDITION TO ACTIVATE THE SYSTEMNBEL0120S02The operation of the theft warning system is controlled by the doors, hood and glass hatch.
To activate the theft warning system, the smart entrance control unit must receive signals indicating the doors,
hood and glass hatch are closed and the doors are locked.
When a door is open, smart entrance control unit terminal 28, 29 or 40 receives a ground signal from each
door switch.
When a door is unlocked, smart entrance control unit terminal 26, 36 or 37 receives a ground signal from ter-
minal 4 of each door unlock sensor or terminal 1 of back door unlock sensor.
When the hood is open, smart entrance control unit terminal 27 receives a ground signal
Ifrom terminal 1 of the hood switch
Ithrough body grounds E13 and E41.
When the glass hatch is open, smart entrance control unit terminal 38 receives a ground signal
Ifrom terminal 1 of the glass hatch switch
Ithrough body grounds D210, B11 and B22.
When the doors are locked with key or multi-remote controller and none of the described conditions exist, the
theft warning system will automatically shift to armed mode.
THEFT WARNING SYSTEM ACTIVATION (WITH KEY OR REMOTE CONTROLLER USED TO
LOCK DOORS)
NBEL0120S03If the key is used to lock doors, terminal 41 receives a ground signal
Ifrom terminal 3 of the key cylinder switch LH
Ithrough back grounds M77 and M111
Ifrom terminal 1 of the back door key cylinder switch
Ithrough body grounds B11, B22 and D210.
If this signal or lock signal from remote controller is received by the smart entrance control unit, the theft
warning system will activate automatically.
Once the theft warning system has been activated, smart entrance control unit terminal 31 supplies ground to
terminal 2 of the security indicator lamp.
The security lamp will illuminate for approximately 30 seconds and then blink.
Now the theft warning system is in armed phase.
THEFT WARNING SYSTEM ALARM OPERATIONNBEL0120S04The theft warning system is triggered by
Iopening a door
Iopening the hood or the glass hatch
Iunlocking door without using the key or multi-remote controller.
Once the theft warning system is in armed phase, if the smart entrance control unit receives a ground signal
at terminal 26, 36, 37 (door unlock sensor), 28, 29, 40 (door switch), 38 (glass hatch switch) or 27 (hood
switch), the theft warning system will be triggered. The headlamps flash and the horn sounds intermittently.
Power is supplied at all times
Ithrough 7.5A fuse (No. 52, located in fuse and fusible link box)
Ito horn relay terminals 1 and 3.
Ithrough 10A fuse (No. 54, located in fuse and fusible link box)
Ito horn relay terminal 6.
When the theft warning system is triggered, ground is supplied intermittently
Ifrom terminal 4 of the smart entrance control unit
Ito headlamp relay LH and RH terminal 2 and
Ifrom terminal 19 of the smart entrance control unit
THEFT WARNING SYSTEM
System Description (Cont'd)
EL-296

Ito horn relay terminal 2.
The headlamps flash and the horn sounds intermittently.
The alarm automatically turns off after 50 seconds but will reactivate if the vehicle is tampered with again.
THEFT WARNING SYSTEM DEACTIVATIONNBEL0120S05To deactivate the theft warning system, a door, the back door or the glass hatch must be unlocked with the
key or remote controller.
When the key is used to unlock the door, smart entrance control unit terminal 30 receives a ground signal
Ifrom terminal 1 of the LH key cylinder switch
Ifrom terminal 2 of the back door key cylinder switch.
When the key is used to open the glass hatch, smart entrance control unit terminal 42 receives a ground sig-
nal from terminal 3 of the back door key cylinder switch.
When the smart entrance control unit receives either one of these signals or unlock signal from remote
controller, the theft warning system is deactivated. (Disarmed phase)
PANIC ALARM OPERATIONNBEL0120S06Multi-remote control system may or may not operate theft warning system (horn and headlamps) as required.
When the multi-remote control system is triggered, ground is supplied intermittently.
Ifrom smart entrance control unit terminal 4
Ito headlamp relay LH and RH terminal 2 and
Ifrom terminal 19 of the smart entrance control unit
Ito horn relay terminal 2.
The headlamp flashes and the horn sounds intermittently.
The alarm automatically turns off after 30 seconds or when smart entrance control unit receives any signal
from multi-remote controller.
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THEFT WARNING SYSTEM
System Description (Cont'd)
EL-297

HORN ALARM CHECK=NBEL0123S09
1 CHECK HORN ALARM OPERATION
1. Disconnect smart entrance control unit connector.
2. Apply ground to smart entrance control unit terminal 19.
SEL346X
Refer to wiring diagram in EL-304.
OK or NG
OK©Horn alarm is OK.
NG©GO TO 2.
2 CHECK HORN RELAY
Check horn relay.
OK or NG
OK©GO TO 3.
NG©Replace horn relay.
3 CHECK POWER SUPPLY FOR HORN RELAY
1. Disconnect horn relay connector.
2. Check voltage between terminal 2 and ground.
SEL347X
OK or NG
OK©GO TO 4.
NG©Check the following.
I7.5A fuse (No. 52, located in the fuse and fusible link box)
IHarness for open or short between horn relay and fuse
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-316