Ac system INFINITI QX4 2001 Factory Service Manual

DOOR UNLOCK SENSOR CHECK=NBEL0123S06
1 CHECK DOOR UNLOCK SENSOR INPUT SIGNAL
Check voltage between smart entrance control unit terminals 26, 36 or 37 and ground.
SEL343X
Refer to wiring diagram in EL-304.
OK or NG
OK©Door unlock sensor is OK.
NG©GO TO 2.
2 CHECK DOOR UNLOCK SENSOR
1. Disconnect door unlock sensor connector.
2. Check continuity between door unlock sensor terminals.
SEL344X
OK or NG
OK©Check the following.
IDoor unlock sensor ground circuit
IHarness for open or short between smart entrance control unit and door unlock sensor
NG©Replace door unlock sensor.
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THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-313

FRONT DOOR KEY CYLINDER SWITCH CHECK=NBEL0123S07
1 CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL (LOCK/UNLOCK SIGNAL)
Check voltage between smart entrance control unit terminals 30 or 41 and ground.
SEL312X
Refer to wiring diagram in EL-303.
OK or NG
OK©Door key cylinder switch LH is OK.
NG©GO TO 2.
2 CHECK DOOR KEY CYLINDER SWITCH
1. Disconnect door key cylinder switch LH connector.
2. Check continuity between door key cylinder switch LH terminals.
SEL313X
OK or NG
OK©Check the following.
IDoor key cylinder switch LH ground circuit
IHarness for open or short between smart entrance control unit and door key cylinder
switch LH
NG©Replace door key cylinder switch LH.
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-314

BACK DOOR KEY CYLINDER SWITCH CHECK=NBEL0123S08
1 CHECK BACK DOOR KEY CYLINDER SWITCH INPUT SIGNAL (LOCK/UNLOCK SIGNAL)
Check voltage between smart entrance control unit terminals 30, 41 or 42 and ground.
SEL314X
Refer to wiring diagram in EL-304.
OK or NG
OK©Back door key cylinder switch is OK.
NG©GO TO 2.
2 CHECK BACK DOOR KEY CYLINDER SWITCH
1. Disconnect back door key cylinder switch connector.
2. Check continuity between back door key cylinder switch terminals.
SEL345X
OK or NG
OK©Check the following.
IBack door key cylinder switch ground circuit
IHarness for open or short between smart entrance control unit and back door key cyl-
inder switch
NG©Replace back door key cylinder switch.
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THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-315

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

4 CHECK HORN RELAY CIRCUIT
1. Disconnect horn relay connector.
2. Check voltage between terminals 3 and 5.
3. Check voltage between terminals 6 and 7.
SEL348X
OK or NG
OK©Check harness for open or short between horn relay and smart entrance control unit.
NG©Check harness for open or short.
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THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-317

THEFT WARNING HEADLAMP ALARM CHECK=NBEL0123S10
1 CHECK THEFT WARNING HEADLAMP ALARM OPERATION
1. Disconnect smart entrance control unit connector.
2. Apply ground to smart entrance control unit terminal 4.
SEL570X
Refer to wiring diagram in EL-304.
OK or NG
OK©Headlamp alarm is OK.
NG©GO TO 2.
2 CHECK HEADLAMP OPERATION
Does headlamp come on when turning lighting switch ªONº?
Ye s©Check harness for open or short between headlamp relay and smart entrance control
unit.
No©Check headlamp system. Refer to ªHEADLAMPº.
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-318

DescriptionNBEL0124The following systems are controlled by the smart entrance control unit.
IWarning chime
IRear window defogger and door mirror defogger timer
IPower door lock
IMulti-remote control system
ITheft warning system
IInterior lamp timer
IElectric sunroof and power window timer
IHeadlamp battery saver
IBattery saver
For detailed description and wiring diagrams, refer to the relevant pages for the each system.
The smart entrance control unit receives data from the switches and sensors to control their corresponding
system relays and actuators.
INPUT/OUTPUTNBEL0124S01
System Input Output
Power door lockDoor lock and unlock switch LH and RH
Key switch (Insert)
Door switches
Door key cylinder switchesDoor lock actuator
Multi-remote controlKey switch (Insert)
Ignition switch (ACC)
Door switches
Front door unlock sensor LH
Door lock and unlock switch LH
Remote controller signalHorn relay
Headlamp relay (LH and RH)
Interior lamp
Multi-remote control relay
Door lock actuator
Warning chimeKey switch (Insert)
Ignition switch (ON)
Lighting switch (1st)
Seat belt switch
Front door switch LHWarning chime (located in smart entrance
control unit)
Rear window defogger and
door mirror defogger timerIgnition switch (ON)
Rear window defogger switchRear window defogger relay
Theft warningIgnition switch (ACC, ON)
Door switches
Hood switch
Glass hatch switch
Door key cylinder switches (lock/unlock)
Door unlock sensoresHorn relay
Headlamp relay (LH and RH)
Security indicator
Interior lamp timerDoor switches
Front door unlock sensor LH
Ignition switch (ON)
Key switch (Insert)Interior lamp
Electric sunroof and power
window timerFront door switches
Ignition switch (ON)Power window relay
Headlamp battery saver timerFront door switches
Ignition switch (ON)Headlamp battery saver control unit
Battery saverIgnition switch (ON)
Door switches
Driver's door unlock sensor
Key switch (Insert)Interior lamp
Luggage room lamp
Spot lamp
Vanity mirror illumination lamp
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SMART ENTRANCE CONTROL UNIT
Description
EL-319

BATTERY SAVERNBEL0124S02The lamp turns off automatically when the interior lamp, luggage room lamp, spot lamp or/and vanity mirror
illumination is illuminated with the ignition key in the OFF position, if the lamp remains lit by the door switch
open signal or if the lamp switch is in the 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 in ignition key cylinder.
SMART ENTRANCE CONTROL UNIT
Description (Cont'd)
EL-320

Component Parts and Harness Connetor
Location
NBEL0170
SEL357X
NOTE:
If customer reports a ªNo Startº condition, request ALL KEYS
to be brought to an INFINITI dealer in case of an IVIS (NATS)
malfunction.
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
Component Parts and Harness Connetor Location
EL-328

System Description=NBEL0171NATS (Nissan Anti-Theft System) has the following immobilizer functions:
ISince only IVIS (NATS) ignition keys, whose ID nos. have been registered into the ECM and IMMU of IVIS
(NATS), allow the engine to run, operation of a stolen vehicle without an IVIS (NATS) registered key is
prevented by IVIS (NATS).
That is to say, IVIS (NATS) will immobilise the engine if someone tries to start it without the registered key
of IVIS (NATS).
IAll of the originally supplied ignition key IDs (except for card plate key) have been IVIS (NATS) registered.
If requested by the vehicle owner, a maximum of five key IDs can be registered into the IVIS (NATS) com-
ponents.
IThe security indicator blinks when the ignition switch is in ªOFFº or ªACCº position. Therefore, IVIS (NATS)
warns outsiders that the vehicle is equipped with the anti-theft system.
IWhen IVIS (NATS) detects trouble, the security indicator lamp lights up while ignition key is in the ªONº
position.
IIVIS (NATS) trouble diagnoses, system initialization and additional registration of other IVIS (NATS) igni-
tion key IDs must be carried out using CONSULT-II hardware and CONSULT-II IVIS (NATS) software.
When IVIS (NATS) initialization has been completed, the ID of the inserted ignition key is automatically
IVIS (NATS) registered. Then, if necessary, additional registration of other IVIS (NATS) ignition key IDs
can be carried out.
Regarding the procedures of IVIS (NATS) initialization and IVIS (NATS) ignition key ID registration, refer
to CONSULT-II operation manual, IVIS/NVIS.
IWhen servicing a malfunction of the IVIS (NATS) (indicated by lighting up of Security Indicator
Lamp) or registering another IVIS (NATS) ignition key ID no., it is necessary to re-register original
key identification. Therefore, be sure to receive ALL KEYS from vehicle owner.
System CompositionNBEL0172The immobiliser function of the IVIS (NATS) consists of the following:
IIVIS (NATS) ignition key
IIVIS (NATS) immobilizer control unit (IMMU) located in the ignition key cylinder
IEngine control module (ECM)
ISecurity indicator
SEL085WE
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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM Ð NATS)
System Description
EL-329