
DIAGNOSTIC PROCEDURE 6
ªSECURITY INDICATOR LAMP DOES NOT LIGHT UPº
Check 10A fuse (No.16 , located in the
fuse block).
OK
ENG Replace fuse.
NATS INITIALIZATION
1. Install the 10A fuse.
2. Perform initialization with CONSULT-II. For the operation of initialization, refer
to ªCONSULT-II operation manual
NATSº.
Turn ignition switch ªOFFº.
Start engine and turn ignition switch
ªOFFº.
Check the security ind. lighting.
NG
EOK INSPECTION END
Check voltage between combination meter
connector terminal q27and ground.
Voltage: Battery voltage
OK
ENG Check harness for open or
short between fuse and
combination meter.
CHECK SECURITY INDICATOR LAMP.
OK
ENGRepair or replace combina-
tion meter.
CHECK HARNESS BETWEEN COMBI-
NATION METER AND NATS IMMU.
1. Disconnect combination meter and
NATS IMMU connector.
2. Check continuity between combination meter terminal q
40and NATS IMMU
harness connector terminal q5.
Continuity should exist.
3. Check continuity between combination meter harness connector terminal q
40and ground.
Continuity should not exist.
OK
ENG
Repair or replace harness.
CHECK NATS IMMU FUNCTION.
1. Connect combination meter connector
and NATS IMMU connector.
2. Check continuity between NATS IMMU terminal q
5and ground.
Continuity should exist intermit-
tently.
OK
ENG NATS IMMU is malfunc-
tioning. Replace IMMU.
Perform initialization
with CONSULT-II.
For the operation of
initialization, refer to
ªCONSULT-II opera-
tion manual NATSº.
INSPECTION END
YEL330D
YEL899E
YEL331D
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NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-241
http://vnx.su/  

SETTING THE THEFT WARNING SYSTEM
Initial condition
(1) Close all doors.
(2) Close hood.
Pre-armed phase and armed phase
The theft warning system turns into the ªpre-armedº phase when hood and all doors are closed and locked by
key or multi-remote controller. (The security indicator lamp blinks intermittently for 30 seconds.)
After about 30 seconds, the system automatically shifts into the ªarmedº phase (the system is set).
CANCELING THE SET THEFT WARNING SYSTEM
When the following (a) or (b) operation is performed, the armed phase is canceled.
(a) Unlock the doors with the multi-remote controller.
(b) Insert key in ignition key cylinder and turn it to ON. Then NATS IMMU will send a disarm signal to the timecontrol unit.
ACTIVATING THE ALARM OPERATION OF THE THEFT WARNING SYSTEM
Make sure the system is in the armed phase. When the following operation (a) (b) (c) or (d) is performed, the
system sounds the horns and flashes the hazard lamp for about 30 seconds.
(a) Engine hood or any door is opened before unlocking door with the multi-remote controller.
(b) A door is unlocked without using the multi-remote controller.
(c) The ignition is switched ON without using a NATS registered key.
(d) The ultrasonic sensing is triggered.
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times.
IThrough 10A fuse [No.
16, located in the fuse block (J/B)]
I to combination meter (security indicator lamp) terminal q
27.
I through 10A fuse [No.
5, located in the fuse block (J/B)]
I to time control unit terminal
U09.
With the ignition switch in the ON or START position, power is supplied
I through 10A fuse [No.
26, located in the fuse block (J/B)]
I to time control unit terminal
U01.
Ground is supplied
I to time control unit terminal
U16
Ithrough body groundsF36andF47(LHD models), orM33andM754(RHD models).
INITIAL CONDITION TO ARM THE SYSTEM
The operation of the theft warning system is controlled by all the doors and hood.
To activate the theft warning system, the time control unit must receive signals indicating all the doors and
hood are closed and the doors are locked.
When a door is open, time control unit terminal
U06orU07receives a ground signal from each door switch.
When a door is unlocked, time control unit terminal
U25,U35orU36receives a ground signal from each door
unlock sensor.
When the hood is open, time control unit terminal
U32receives a ground signal
I from the hood switch
I through body grounds
M33andM754.
THEFT WARNING SYSTEM
System Description (Cont'd)
EL-245
http://vnx.su/  

THEFT WARNING SYSTEM ARMING (With key or remote controller used to lock doors)
If the key is used to lock doors, time control unit terminalU29receives a ground signal
I from terminal q
2of the key cylinder switch
I through body grounds
B18andB10.
If this signal or lock signal from remote controller is received by the time control unit, the theft warning sys-
tem will arm automatically.
When arming the theft warning system, time control unit terminal
U18supplies ground intermittently to termi-
nal q
40of the combination meter. The security lamp will blink intermittently for approximately 30 seconds (and
then blink every 2.6 seconds, due to NATS).
Now the theft warning system is in armed phase.
THEFT WARNING SYSTEM ALARM OPERATION
The theft warning system is triggered by
I opening a door
I opening back door
I opening the hood
I unlocking door without using the multi-remote controller
I switching the ignition ON without a NATS registered key
I triggering the ultrasonic sensors
Once the theft warning system is in armed phase, if the time control unit receives a signal at terminal
U25,
U35,U36(door unlock sensor),U06,U07(door switch),U32(hood switch), orU30(ultrasonic sensor) the theft
warning system will be triggered. The hazard lamps flash and the horn sounds intermittently.
Power is supplied at all times
I through 10A fuse [No.
16, located in the fuse block (J/B)]
I to theft warning horn relay.
If the theft warning system is triggered, ground is supplied
I from terminal
U43of the time control unit
I to theft warning horn relay.
The hazard lamps flash and the horn sounds intermittently.
The alarm automatically turns off after 30 seconds but will reactivate if the vehicle is tampered with again, or
if the initial cause remains present.
THEFT WARNING SYSTEM ALARM DISARMING
The theft warning system alarm operation can be deactivated by either unlocking the vehicle with the remote
controller, or turning the ignition to the ªONº position with a registered NATS key.
THEFT WARNING SYSTEM
System Description (Cont'd)
EL-246
http://vnx.su/  

Trouble Diagnoses
Alarm Trigger Feedback
To verify the last three triggers that activated the theft warning system, the Time Control Unit (TCU) can be
switched into Diagnostic Mode (see page EL-218 how to enter Diagnostic Mode).
Approximately 2 seconds after the TCU has finished flashing the hazard lamp to confirm that the Diagnostic
Mode has been successfully entered, the TCU will generate a short beep indicating the trigger that will be dis-
played. A single beep means the most recent trigger, three beeps means the oldest trigger. Following each
beep or group of beeps, the hazard lamp will flash to indicate the alarm trigger.
Source of Alarm TriggerNumber (of flashes)
Driver's door lock status switch 1
Passenger door lock status switch 2
Rear door lock status switch 3
Ignition line 4
Driver's door open switch 5
Other door open switch 6
Trunk or back door open switch 8
Hood switch 9
Ultrasonic sensors 10
In case there have been no alarm triggers, there will be no indicator flashes between the audible signals. After
completing the alarm trigger feedback, the TCU will enter Diagnostic Mode as described on page EL-218.
Before continuing trouble diagnoses on the next page, perform the checks as mentioned in the table on page
EL-219.
THEFT WARNING SYSTEM
EL-264
http://vnx.su/  

PRELIMINARY CHECK
The system operation is canceled by turning the ignition switch to ªONº at any step between START and
ARMED in the following flow chart.
System phaseSTART
Note: Before starting operation check, open front windows.
EDISARMED Turn ignition switch ªOFFº and remove the ignition key.
ªSECURITYº indicator lamp will blink every 2.6 seconds.
(NATS)
OK
ENGRefer to NATS
trouble diagno-
sis.
Close all doors, hood and trunk lid.
Press the ultrasonic cancel switch. The ªSECURITYº indicator lamp
will go on for approximately 6 seconds.
OK
ENGSYMPTOM 1
PRE-ARMED Lock doors using key or multi-remote controller.
ARMEDFor about 30 seconds, ªSECURITYº indicator lamp will blink inter-
mittently.
OK
ENGSYMPTOM 2
Disarm the system by unlocking the vehicle using the remote con-
troller. Arm the system again without excluding the ultrasonic sen-
sors.
ALARM Unlock any door without multi-remote controller, activate the ultra-
sonic sensors by inserting an object into the vehicle's interior, or
open hood or door.
........................................................................\
...............................
Alarm (horn and hazard lamp) will operate.
OK
ENGSYMPTOM 3
ENGSYMPTOM 4
EDISARMED Unlock the vehicle using the multi-remote controller or insert the
key in the ignition and switch it to ON.
Alarm (horn and hazard lamp) will stop.
OK
ENGSYMPTOM 5
System is OK.
After performing preliminary check, go to ªSYMPTOM CHARTº, EL-266.
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THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-265
http://vnx.su/  

Before starting trouble diagnoses below, perform ªPRELIMINARY CHECKº, EL-265.
Symptom numbers in the symptom chart correspond with those of Preliminary check.
SYMPTOM CHART
ProcedureÐPower supply
and ground cir- cuit check Diagnostic procedure Ð Ð
REFERENCE PAGE
EL-265
EL-267
EL-267
EL-268
EL-270
EL-271
EL-272
EL-273
EL-274
EL-204
EL-222
SYMPTOMPreliminary check
Power supply circuit check
Ground circuit check
Diagnostic Procedure 1
(Door, hood and back door switch check)
Diagnostic Procedure 2
(Security indicator lamp check)
Diagnostic Procedure 3
(Door unlock sensor check)
Diagnostic Procedure 4
(Door key cylinder switch check)
Diagnostic Procedure 5
(Theft warning horn alarm check)
Diagnostic procedure 6
(Hazard lamp alarm check)
Check ªMULTI-REMOTE
CONTROLº system.
Check ªNATS (Nissan Anti-Theft system)º.
1 Security indicator does not turn ªONº or
blinking. XXX X
2 Theft
warning
system
cannot
be set
by... All items
XXXX X
Door out side key X X X X
Multi-remote control X X X X
3 *1 Theft
warning
system
does not
alarm
when... Any door is opened.
XXXX
Any door is unlocked with-
out using key or multi-re-
mote controller XXX
X
4 Theft
warning
alarm
does not
activate. All function
XXXX X
Horn alarm X X X X
Hazard lamp X X X X
5 Theft
warning
system
cannot be
canceled
by... Turning the ignition ON *2 X X X
X
Multi-remote controller X X X X
X: Applicable
*1: Make sure the system is in the armed phase.
*2: Make sure the key is NATS registered.
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-266
http://vnx.su/  

POWER SUPPLY AND GROUND CIRCUIT CHECK
Main power supply circuit check
TerminalsIgnition switch position
!@ OFF ACC ON
U09GroundBattery
voltage Battery
voltage Battery
voltage
U01Ground 0V 0VBattery
voltage
Ground circuit check
Terminals Continuity
U16- GroundYes
NEL606
YEL336D
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-267
http://vnx.su/