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Infiniti QX4. Electrical System (2003 year). Manual - part 31

Description

NBEL0407

OUTLINE

NBEL0407S01

The smart entrance control unit totally controls the following body electrical system operations.

쐌

Headlamp auto light control system

쐌

Warning chime

쐌

Rear defogger and door mirror defogger timer

쐌

Power door lock

쐌

Remote keyless entry system

쐌

Vehicle security system

쐌

Interior lamp

In addition, the following timer operations are controlled by the smart entrance control unit.

쐌

Battery saver control

쐌

Retained power control

BATTERY SAVER CONTROL

NBEL0407S02

Headlamps/Parking Lamps/License Lamps/Tail Lamps/Fog Lamps/Illumination Lamps

NBEL0407S0201

While the headlamps (including parking, license, tail, fog and illumination lamps) are turned ON by “1ST” or
“2ND” of lighting switch, the exterior lamp battery saver control is activated when the ignition switch signal
changes from ON (or ACC) to OFF, and either one of LH or RH front door switch ON signal is received. The
headlamps (including parking, license, tail, fog and illumination lamps) are turned off after 5 minutes.
While the headlamps are turned ON by “AUTO” operation, the exterior lamp battery saver control is activated
when the ignition switch is turned from ON (or ACC) to OFF, and either LH or RH front door switch ON sig-
nal is input.
The smart entrance control unit controls timer activation as follows:

쐌

When the door switch signal changes from ON to OFF while the exterior lamp battery saver is activated,
the operation is discontinued, restarts and lasts for 45 seconds, then the headlamps (including parking,
license, tail, fog and illumination lamps) will be turned off.

쐌

When the door switch signal changes from OFF to ON while the exterior lamp battery saver is activated,
the operation is discontinued, restarts and lasts for 45 seconds, then the headlamps will be turned off.

쐌

When the one of four door switch signals changes from OFF to ON while the exterior lamp battery saver
is activated, the operation is discontinued, restarts and lasts for 5 minutes, then the headlamps (including
parking, license, tail, fog and illumination lamps) will be turned off.

쐌

When all the door switch ON signals are input while the exterior lamp battery saver is activated, the
operation is discontinued, restarts and lasts for 45 seconds, then the headlamps (including parking,
license, tail, fog and illumination lamps) will be turned off.

The “45” second timer’s duration can be changed with the function setting mode of CONSULT-II.

Interior Lamp/Luggage Room Lamp/Spot Lamp/Vanity Mirror Illumination

NBEL0407S0202

The lamps turn off automatically when the interior lamp, spot lamp or/and vanity mirror illumination are illumi-
nated 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 30 minutes.
After lamps are turned off by the battery saver system, the lamps illuminate again when:

쐌

Door is locked or unlocked with keyfob or door lock/unlock switch or door key cylinder.

쐌

Ignition switch ON.

쐌

Door is opened or closed,

쐌

Key is inserted or removed into ignition key cylinder.

Rear Window Defogger/Door Mirror Defogger

NBEL0407S0203

Rear window defogger and door mirror defogger are turned off in approximately 15 minutes after the rear win-
dow defogger switch is turned on.

RETAINED POWER CONTROL

NBEL0407S03

When the ignition switch is turned to OFF (or ACC) position from ON or START position, the following sys-
tems can be operated for 45 seconds by the RAP signal from the smart entrance control unit terminal 46.

쐌

Electric sunroof

쐌

Power window

The retained power operation is canceled when the driver or passenger side door is opened.

IDX

SMART ENTRANCE CONTROL UNIT

Description

EL-485

INPUT/OUTPUT

NBEL0407S04

System

Input

Output

Power door lock

Door lock and unlock switch LH and RH
Key switch (Insert)
Door switches
Door key cylinder switches

Door lock actuator

Remote keyless entry

Key switch (Insert)
Ignition switch (ACC)
Door switches
Keyfob signal
Door lock/unlock switch LH

Horn relay
Headlamp relay (LH and RH)
Hazard warning lamp
Interior lamp
Power window main switch
Door lock actuator
Opener actuator

Warning chime

Key switch (Insert)
Ignition switch (ON)
Lighting switch (1st)
Seat belt switch (driver’s seat)
Front door switch LH

Warning chime (located in smart entrance
control unit)

Rear window defogger and
door mirror defogger

Ignition switch (ON)
Rear window defogger switch

Rear window defogger relay

Vehicle security

Ignition switch (ACC, ON)
Door switches
Hood switch
Back door switch
Glass hatch switch
Door lock/unlock switches
Door key cylinder switches (lock/unlock)

Horn relay
Headlamp relay
Security indicator

Interior lamp

Door switches
Keyfob signal (lock/unlock)
Door lock/unlock switches (lock/unlock)
Door key cylinder switch (lock/unlock)
Ignition switch (ON)
Key switch (Insert)

Interior lamp
Step lamp
Door indicator

Battery saver control for
headlamps/parking lamps/
licence lamps/tail lamps/fog
lamps/illumination lamps

Ignition switch (ON)
Lighting switches

Headlamps
Parking lamps
Licence lamps
Tail lamps
Fog lamps
Illumination lamps

Battery saver control for inte-
rior lamp/spot lamp/vanity mir-
ror illumination

Ignition switch (ON)
Front door switches
Lamp switches

Interior lamp
Step lamp
Spot lamp
Vanity mirror illumination

Battery saver control for rear
window defogger and door
mirror defogger

Ignition switch (ON)
Rear window defogger switch

Rear window defogger relay

Retained power control for
electric sunroof

Ignition switch (ON)
Front door switches

Sunroof motor

Retained power control for
power window

Ignition switch (ON)
Front door switches

Power window relay

SMART ENTRANCE CONTROL UNIT

Description (Cont’d)

EL-486

CONSULT-II

NBEL0408

DIAGNOSTIC ITEMS APPLICATION

NBEL0408S01

Item (CONSULT-II

screen terms)

Diagnosed system

DATA MONITOR

ACTIVE TEST

WORK SUPPORT

DOOR LOCK

Power door lock

REAR DEFOGGER

Rear window defogger

KEY WARN ALM

Warning chime

LIGHT WARN ALM

Warning chime

SEAT BELT ALM

Warning chime

INT LAMP

Interior lamps

BATTERY SAVER

Battery saver control for
interior lamp

THEFT WAR ALM

Vehicle security system

RETAINED PWR

Retained power control

MULTI REMOTE ENT

Remote keyless entry
system

HEAD LAMP

Headlamp

X: Applicable
For diagnostic item in each control system, refer to the relevant pages for each system.

DIAGNOSTIC ITEM DESCRIPTION

NBEL0408S02

MODE

Description

DATA MONITOR

Input/output data in the smart entrance control unit can be
read.

ACTIVE TEST

Diagnostic Test Mode in which CONSULT-II drives some sys-
tems apart from the smart entrance control unit.

WORK SUPPORT for DOOR LOCK

쐌

Select unlock mode ON-OFF setting can be changed.

쐌

Key reminder door mode ON-OFF setting can be changed.

WORK SUPPORT for INT LAMP

Interior lamp timer mode ON-OFF setting can be changed.

WORK SUPPORT for BATTERY SAVER

Interior lamp battery saver period can be changed.

WORK SUPPORT for THEFT WAR ALM

쐌

The recorded trigger signal when vehicle security system
was activated can be checked.

쐌

Security alarm ON-OFF setting can be changed.

WORK SUPPORT for RETAINED PWR SET

RAP signal’s power supply period can be changed.

WORK SUPPORT for MULTI REMOTE ENT

쐌

ID code of keyfob can be registered and erased.

쐌

Hazard and horn reminder mode can be changed.

쐌

Pressing time of panic alarm and door unlock (for power
window down operation) buttons on keyfob can be changed.

쐌

Auto lock operation starting time can be changed.

WORK SUPPORT for HEADLAMP

쐌

Auto light sensitivity can be changed.

쐌

Exterior lamp battery saver control ON-OFF setting can be
changed.

쐌

Auto light delay off time can be changed.

IDX

SMART ENTRANCE CONTROL UNIT

CONSULT-II

EL-487

SEL670Y

CONSULT-II INSPECTION PROCEDURE

NBEL0408S03

Turn ignition switch “OFF”.

Connect “CONSULT-II” to the data link connector.

SKIA3098E

Turn ignition switch “ON”.

Touch “START (NISSAN BASED VHCL)”.

SEL398Y

Touch “SMART ENTRANCE”.

SEL751Y

Perform each diagnostic item according to “DIAGNOSTIC
ITEMS APPLICATION”. Refer to EL-487.

SMART ENTRANCE CONTROL UNIT

CONSULT-II (Cont’d)

EL-488

NOTE:

IDX

SMART ENTRANCE CONTROL UNIT

CONSULT-II (Cont’d)

EL-489

Schematic

NBEL0409

MEL364Q

SMART ENTRANCE CONTROL UNIT

Schematic

EL-490

MEL365Q

IDX

SMART ENTRANCE CONTROL UNIT

Schematic (Cont’d)

EL-491

Smart Entrance Control Unit Inspection Table

NBEL0492

Terminal

No.

Wire

color

Connections

Operated condition

Voltage

(Approximate val-

ues)

G/OR

Driver door switch

OFF (Closed)

ON (Open)

12V

Passenger door switch

OFF (Closed)

ON (Open)

R/L

Rear door switch

OFF (Closed)

ON (Open)

Y/B

Hood switch

ON (Open)

OFF (Closed)

12V

W/G

Auto light sensor (Signal)

Ignition switch
ON position

Light is applied to auto light sen-
sor.

1 to 5V

Light is not applied to auto light
sensor.

Less than 1V

L/R

Auto light sensor (GND)

—

Auto light sensor (Power)

Ignition switch (OFF

ON)

Back door key cylinder unlock
switch

OFF (Neutral)

ON (Unlocked)

Back door key cylinder lock
switch

OFF (Neutral)

ON (Locked)

W/PU

Back door key cylinder switch

OFF (Neutral)

ON (Unlock)

L/W

Glass hatch switch

ON (Open)

OFF (Closed)

Rear window defogger switch

OFF

ON (Only when pushed)

R/G

Tail lamp relay (Output)

Ignition switch
(with lighting
switch 1ST or
2ND)

ON or START

OFF position

More than 5
minutes after
ignition switch is
turned to OFF
position

12V

Within 5 minutes
after ignition
switch is turned
to OFF position

ON or START position

Headlamps illuminate by auto light control. (Operate

Not operate)

Less than 1V

12V

Tail lamp switch

Light switch (OFF or AUTO

1ST or 2ND position)

12V

PU/R

Headlamp LH relay

Ignition switch
(with lighting
switch 2ND)

ON or START

OFF position

More than 5
minutes after
ignition switch is
turned to OFF
position

12V

Within 5 minutes
after ignition
switch is turned
to OFF position

ON or START position

Headlamps illuminate by auto light control. (Operate

Not operate)

Less than 1V

12V

SMART ENTRANCE CONTROL UNIT

Smart Entrance Control Unit Inspection Table

EL-492

Terminal

No.

Wire

color

Connections

Operated condition

Voltage

(Approximate val-

ues)

Headlamp switch

Lighting switch

Except PASS or 2ND position

12V

PASS or 2ND position

Headlamps illuminate by auto light control. (Operate

Not operate)

10V

12V

L/Y

Headlamp switch

Ignition switch
“ON” position

Lighting switch (Except AUTO

AUTO position)

12V

W/R

Ignition key switch (Insert)

Key inserted

Key removed from IGN key cylinder

12V

G/W

Ignition switch (ACC)

“ACC” position

12V

W/B

Ignition switch (ON)

Ignition key is in “ON” position

12V

B/Y

Seat belt buckle switch

Unfastened

Fastened (Ignition key is in “ON” posi-

tion)

12V

R/B

Interior lamp

When doors are locked using keyfob (Lamp switch in
“DOOR” position)

12V

Communication interface

Door lock and unlock switches (Neutral

Lock/

unlock)

Refer to EL-492.

Front door key cylinder switch LH (Neutral

Lock/

unlock)

G/B

Rear window defogger relay

OFF

ON (Ignition key is in “ON” position)

12V

BR/Y

Security indicator

Goes off

Illuminates

12V

LG/B

Horn relay

When panic alarm is operated using keyfob (ON

OFF)

12V

Ground

—

R/Y

Power window relay

Retained power operation is operated (ON

OFF)

12V

GY/L

LH turn signal lamp

When door lock or unlock is operated using keyfob
(ON

OFF)

12V

GY/R

RH turn signal lamp

When door lock or unlock is operated using keyfob
(ON

OFF)

12V

G/R

Power source (Fuse)

—

12V

R/W

Battery saver (Interior lamp)

Battery saver operates

Does not operate (ON

OFF)

12V

W/R

Power source (PTC)

—

12V

Door lock actuators

Door lock & unlock switch (Free

Lock)

12V

W/PU

Driver door lock actuator

Door lock & unlock switch (Free

Unlock)

12V

Y/B

Passenger, rear and back
doors lock actuator

Door lock & unlock switch (Free

Unlock)

12V

IDX

SMART ENTRANCE CONTROL UNIT

Smart Entrance Control Unit Inspection Table (Cont’d)

EL-493

Terminal

No.

Wire

color

Connections

Operated condition

Voltage

(Approximate val-

ues)

Tail lamp relay

Ignition switch
(with lighting
switch 1ST or
2ND)

ON or START

OFF position

More than 5
minutes after
ignition switch is
turned to OFF
position

12V

Within 5 minutes
after ignition
switch is turned
to OFF position

ON or START position

Headlamps illuminate by auto light control. (Operate

Not operate)

Less than 1V

12V

G/W

Tail lamp switch

Lighting switch OFF or AUTO

1ST or 2ND

12V

PU/W

Headlamp RH relay

Ignition switch
(with lighting
switch OFF or
1ST)

ON or START

OFF position

More than 5
minutes after
ignition switch is
turned to OFF
position

12V

Within 5 minutes
after ignition
switch is turned
to OFF position

ON or START position

Headlamps illuminate by auto light control.
(Operate

Not operate)

Less than 1V

12V

Headlamp switch

Lighting switch

Except PASS or 2ND position

12V

PASS or 2ND position

Headlamps illuminate by auto light control. (Operate

Not operate)

10V

12V

Ground

—

SEL739Y

COMMUNICATION INTERFACE SIGNAL

NBEL0492S01

Voltage:

12 V

→

9V (10 sec.) measurement by analog circuit

tester.

SMART ENTRANCE CONTROL UNIT

Smart Entrance Control Unit Inspection Table (Cont’d)

EL-494

Wiring Diagram — TRNSCV —

NBEL0411

MEL627P

IDX

HOMELINK UNIVERSAL TRANSCEIVER

Wiring Diagram — TRNSCV —

EL-495

Trouble Diagnoses

NBEL0412

DIAGNOSTIC PROCEDURE

NBEL0412S01

SYMPTOM: Homelink universal transceiver does not activate
receiver.
Before conducting the procedure given below, make sure that sys-
tem receiver (garage door opener, etc.) operates with original,
hand-held transmitter. If NG, receiver or hand-held transmitter is at
fault, not vehicle related.

PRELIMINARY CHECK

1. Turn ignition switch “OFF”.
2. Does red light (LED) of homelink universal transceiver illuminate when any button is pressed?

SEL442UB

Yes or No

Yes

䊳

GO TO 2.

䊳

GO TO 3.

CHECK HOMELINK UNIVERSAL TRANSCEIVER FUNCTION

Check homelink universal transceiver with Tool.
For details, refer to Technical Service Bulletin.

OK or NG

䊳

Receiver or hand-held transmitter fault, not vehicle related.

䊳

Replace homelink universal transceiver with sun visor assembly.

CHECK POWER SUPPLY

1. Disconnect homelink universal transceiver connector.
2. Turn ignition switch “OFF”.
3. Check voltage between homelink universal transceiver harness connector terminal 1 and body ground.

SEL358X

OK or NG

䊳

GO TO 4.

䊳

GO TO 5.

HOMELINK UNIVERSAL TRANSCEIVER

Trouble Diagnoses

EL-496

CHECK GROUND CIRCUIT

Check continuity between homelink universal transceiver harness connector R5 terminal 2 and ground.

SEL359X

OK or NG

䊳

Replace homelink universal transceiver with sun visor assembly.

䊳

Repair harness.

CHECK MAIN POWER SUPPLY FOR SMART ENTRANCE CONTROL UNIT

1. Disconnect smart entrance control unit.
2. Check voltage between smart entrance control unit harness connector M123 terminal 49 (G/R) and ground.

SEL284Y

OK or NG

䊳

GO TO 6.

䊳

Check the following.

쐌

7.5A fuse No. 24, located in fuse block (J/B)

IDX

HOMELINK UNIVERSAL TRANSCEIVER

Trouble Diagnoses (Cont’d)

EL-497

CHECK GROUND CIRCUIT FOR SMART ENTRANCE CONTROL UNIT

Check continuity between smart entrance control unit harness connector M122 terminal 43 (B) or M123 terminal 64 (B)
and ground.

SEL285Y

OK or NG

䊳

Power supply and ground circuits are OK.

䊳

Check ground harness.

HOMELINK UNIVERSAL TRANSCEIVER

Trouble Diagnoses (Cont’d)

EL-498

Component Parts and Harness Connetor
Location

NBEL0413

SEL678YA

NOTE:
If customer reports a “No Start” condition, request ALL KEYS
to be brought to the INFINITI dealer in case of an IVIS (NATS)
malfunction.

IDX

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Component Parts and Harness Connetor Location

EL-499

System Description

=NBEL0482

NATS (Nissan Anti-Theft System) has the following immobilizer functions:

쐌

Since 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 immobilize the engine if someone tries to start it without the registered key
of IVIS (NATS).

쐌

All 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.

쐌

The security indicator blinks when the ignition switch is in “OFF” or “ACC” position. Therefore, IVIS (NATS)
warns outsiders that the vehicle is equipped with the anti-theft system.

쐌

When IVIS (NATS) detects trouble, the security indicator lamp lights up while ignition key is in the “ON”
position.

쐌

IVIS (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.

쐌

When 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 Composition

NBEL0483

The immobilizer function of the IVIS (NATS) consists of the following:

쐌

IVIS (NATS) ignition key

쐌

IVIS (NATS) immobilizer control unit (IMMU) located in the ignition key cylinder

쐌

Engine control module (ECM)

쐌

Security indicator

SEL085WE

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

System Description

EL-500

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