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.
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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
X
X
X
REAR DEFOGGER
Rear window defogger
X
X
KEY WARN ALM
Warning chime
X
X
LIGHT WARN ALM
Warning chime
X
X
SEAT BELT ALM
Warning chime
X
X
INT LAMP
Interior lamps
X
X
X
BATTERY SAVER
Battery saver control for
interior lamp
X
X
X
THEFT WAR ALM
Vehicle security system
X
X
X
RETAINED PWR
Retained power control
X
X
X
MULTI REMOTE ENT
Remote keyless entry
system
X
X
X
HEAD LAMP
Headlamp
X
X
X
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.
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SMART ENTRANCE CONTROL UNIT
CONSULT-II
EL-487
SEL670Y
CONSULT-II INSPECTION PROCEDURE
NBEL0408S03
1.
Turn ignition switch “OFF”.
2.
Connect “CONSULT-II” to the data link connector.
SKIA3098E
3.
Turn ignition switch “ON”.
4.
Touch “START (NISSAN BASED VHCL)”.
SEL398Y
5.
Touch “SMART ENTRANCE”.
SEL751Y
6.
Perform each diagnostic item according to “DIAGNOSTIC
ITEMS APPLICATION”. Refer to EL-487.
SMART ENTRANCE CONTROL UNIT
CONSULT-II (Cont’d)
EL-488
NOTE:
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SMART ENTRANCE CONTROL UNIT
CONSULT-II (Cont’d)
EL-489
Schematic
NBEL0409
MEL364Q
SMART ENTRANCE CONTROL UNIT
Schematic
EL-490
MEL365Q
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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)
1
G/OR
Driver door switch
OFF (Closed)
,
ON (Open)
12V
,
0V
2
Y
Passenger door switch
OFF (Closed)
,
ON (Open)
5V
,
0V
3
R/L
Rear door switch
OFF (Closed)
,
ON (Open)
5V
,
0V
6
Y/B
Hood switch
ON (Open)
,
OFF (Closed)
0V
,
12V
7
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
8
L/R
Auto light sensor (GND)
—
—
9
GY
Auto light sensor (Power)
Ignition switch (OFF
,
ON)
0V
,
5V
10
LG
Back door key cylinder unlock
switch
OFF (Neutral)
,
ON (Unlocked)
5V
,
0V
11
Y
Back door key cylinder lock
switch
OFF (Neutral)
,
ON (Locked)
5V
,
0V
12
W/PU
Back door key cylinder switch
OFF (Neutral)
,
ON (Unlock)
5V
,
0V
13
L/W
Glass hatch switch
ON (Open)
,
OFF (Closed)
5V
,
0V
14
OR
Rear window defogger switch
OFF
,
ON (Only when pushed)
5V
,
0V
19
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
0V
ON or START position
0V
Headlamps illuminate by auto light control. (Operate
,
Not operate)
Less than 1V
,
12V
20
G
Tail lamp switch
Light switch (OFF or AUTO
,
1ST or 2ND position)
12V
,
0V
21
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
0V
ON or START position
0V
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)
22
SB
Headlamp switch
Lighting switch
Except PASS or 2ND position
12V
PASS or 2ND position
0V
Headlamps illuminate by auto light control. (Operate
,
Not operate)
10V
,
12V
23
L/Y
Headlamp switch
Ignition switch
“ON” position
Lighting switch (Except AUTO
,
AUTO position)
12V
,
0V
25
W/R
Ignition key switch (Insert)
Key inserted
,
Key removed from IGN key cylinder
12V
,
0V
26
G/W
Ignition switch (ACC)
“ACC” position
12V
27
W/B
Ignition switch (ON)
Ignition key is in “ON” position
12V
28
B/Y
Seat belt buckle switch
Unfastened
,
Fastened (Ignition key is in “ON” posi-
tion)
0V
,
12V
31
R/B
Interior lamp
When doors are locked using keyfob (Lamp switch in
“DOOR” position)
0V
,
12V
33
BR
Communication interface
Door lock and unlock switches (Neutral
,
Lock/
unlock)
Refer to EL-492.
Front door key cylinder switch LH (Neutral
,
Lock/
unlock)
37
G/B
Rear window defogger relay
OFF
,
ON (Ignition key is in “ON” position)
12V
,
0V
38
BR/Y
Security indicator
Goes off
,
Illuminates
12V
,
0V
42
LG/B
Horn relay
When panic alarm is operated using keyfob (ON
,
OFF)
12V
,
0V
43
B
Ground
—
—
46
R/Y
Power window relay
Retained power operation is operated (ON
,
OFF)
12V
,
0V
47
GY/L
LH turn signal lamp
When door lock or unlock is operated using keyfob
(ON
,
OFF)
12V
,
0V
48
GY/R
RH turn signal lamp
When door lock or unlock is operated using keyfob
(ON
,
OFF)
12V
,
0V
49
G/R
Power source (Fuse)
—
12V
50
R/W
Battery saver (Interior lamp)
Battery saver operates
,
Does not operate (ON
,
OFF)
12V
,
0V
51
W/R
Power source (PTC)
—
12V
54
L
Door lock actuators
Door lock & unlock switch (Free
,
Lock)
0V
,
12V
55
W/PU
Driver door lock actuator
Door lock & unlock switch (Free
,
Unlock)
0V
,
12V
56
Y/B
Passenger, rear and back
doors lock actuator
Door lock & unlock switch (Free
,
Unlock)
0V
,
12V
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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)
57
R
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
0V
ON or START position
0V
Headlamps illuminate by auto light control. (Operate
,
Not operate)
Less than 1V
,
12V
58
G/W
Tail lamp switch
Lighting switch OFF or AUTO
,
1ST or 2ND
12V
,
0V
59
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
0V
ON or START position
0V
Headlamps illuminate by auto light control.
(Operate
,
Not operate)
Less than 1V
,
12V
60
L
Headlamp switch
Lighting switch
Except PASS or 2ND position
12V
PASS or 2ND position
0V
Headlamps illuminate by auto light control. (Operate
,
Not operate)
10V
,
12V
64
B
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
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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.
1
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.
No
䊳
GO TO 3.
2
CHECK HOMELINK UNIVERSAL TRANSCEIVER FUNCTION
Check homelink universal transceiver with Tool.
For details, refer to Technical Service Bulletin.
OK or NG
OK
䊳
Receiver or hand-held transmitter fault, not vehicle related.
NG
䊳
Replace homelink universal transceiver with sun visor assembly.
3
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
OK
䊳
GO TO 4.
NG
䊳
GO TO 5.
HOMELINK UNIVERSAL TRANSCEIVER
Trouble Diagnoses
EL-496
4
CHECK GROUND CIRCUIT
Check continuity between homelink universal transceiver harness connector R5 terminal 2 and ground.
SEL359X
OK or NG
OK
䊳
Replace homelink universal transceiver with sun visor assembly.
NG
䊳
Repair harness.
5
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
OK
䊳
GO TO 6.
NG
䊳
Check the following.
쐌
7.5A fuse No. 24, located in fuse block (J/B)
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HOMELINK UNIVERSAL TRANSCEIVER
Trouble Diagnoses (Cont’d)
EL-497
6
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
OK
䊳
Power supply and ground circuits are OK.
NG
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.
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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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