
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.
H
H
H
HH
HH
H
HH
HH
H
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/

DIAGNOSTIC PROCEDURE 3
(Door unlock sensor check)
CHECK DOOR UNLOCK SENSOR INPUT SIG-
NAL.
Remove time control unit from fuse block.
Note: Junction block (J/B) is very fragile.
TCU should be removed carefully to avoid
breaking the locking bars.
Check continuity between time control unit termi-
nalsq
25,q35,q36and ground.
NG
EOK
Door unlock sensor
is OK.
CHECK DOOR UNLOCK SENSOR.
1. Disconnect door unlock sensor connector.
2. Check continuity between door unlock sensor terminals.
OK
ENG Replace door
unlock sensor.
Check the following:
IDoor unlock sensor ground circuit
I Harness for open or short between control unit
and door unlock sensor
Terminals
Condition Continuity
!@
Driver
side door
U35Ground Locked No
Unlocked Yes
Passen- ger
side door
U36Ground Locked No
Unlocked Yes
Rear door
U25Ground Locked No
Unlocked Yes
Terminals Condition Continuity
Front with
super lock and rear q
2-
q5Locked No
Unlocked Yes
Front with- out super lock q
2-
q4Locked No
Unlocked Yes
YEL342D
YEL905E
H
H
THEFT WARNING SYSTEM
Trouble Diagnoses (Cont'd)
EL-271
http://vnx.su/

Use the chart below to find out what each wiring
diagram code stands for.
Refer to the wiring diagram code in the alphabetical
index to find the location (page number) of each
wiring diagram.
Code Section Wiring Diagram Name
A/C, M HA MANUAL AIR CONDITIONER
A/CCUT EC AIR CONDITIONER CUT CONTROL
ABS BR ANTI-LOCK BRAKE SYSTEM
ACC/SW EC ACCELERATOR SWITCH (FC)
APS AT, EC ACCELERATOR POSITION SEN-
SOR
AT/C EC A/T CONTROL
AUDIO EL AUDIO
BA/FTS AT A/T FLUID TEMPERATURE SEN-
SOR AND TCM POWER SUPPLY
BACK/L EL BACK-UP LAMP
BOOST EC TURBOCHARGER BOOST SEN-
SOR
BRK/SW EC BRAKE SWITCH
CHARGE SC CHARGING SYSTEM
CHIME EL WARNING CHIME
CIGAR EL CIGARETTE LIGHTER
CKPS EC CRANK SHAFT POSITION SEN-
SOR (OBD)
CLOCK EL CLOCK
COOL/F EC COOLING FAN CONTROL
D/LOCK EL POWER DOOR LOCK
DEF EL REAR WINDOW DEFOGGER
DTRL EL HEADLAMP Ð WITH DAYTIME
LIGHT SYSTEM
ECMRLY EC ECM RELAY
ECTS EC ENGINE COOLANT TEMPERA-
TURE SENSOR
EGRC/V EC EGR VALVE AND EVAP CANISTER
PURGE CONTROL SOLENOID
VA LV E
EGVC/V EC EGR VOLUME CONTROL VALVE
ENGSS AT ENGINE SPEED SIGNAL
F/FOG EL FRONT FOG LAMP
FTS AT A/T FLUID TEMPERATURE SEN-
SOR
GLOW EC QUICK GLOW SYSTEM
H/AIM EL HEADLAMP AIMING CONTROL
SYSTEM
H/LAMP EL HEADLAMP
HEATER HA HEATER SYSTEM
Code Section Wiring Diagram Name
HEATUP EC HEAT UP SWITCH
HLC EL HEADLAMP CLEANER
HORN EL HORN
HSEAT EL HEATED SEAT
ILL EL ILLUMINATION
INJPMP EC ELECTRONIC CONTROL FUEL
INJECTION PUMP
INT/L EL INTERIOR AND MAP LAMPS
INT/V EC INTAKE AIR CONTROL VALVE
CONTROL SOLENOID VALVE
LPSV AT LINE PRESSURE SOLENOID
VA LV E
MAFS EC MASS AIR FLOW SENSOR
MAIN AT MAIN POWER SUPPLY AND
GROUND CIRCUIT
MAIN EC MAIN POWER SUPPLY AND
GROUND CIRCUIT
METER EL SPEEDOMETER, TACHOMETER,
TEMP. AND FUEL GAUGES
MIL EC MALFUNCTION INDICATOR
MIL/DL EC MIL AND DATA LINK CONNEC-
TORS
MIRROR EL DOOR MIRROR
MULTI EL REMOTE KEYLESS ENTRY SYS-
TEM
NATS EL NISSAN ANTI-THEFT SYSTEM
NLS EC NEEDLE LIFT SENSOR
NONDTC AT NON-DETECTABLE ITEMS
OILPSW EC OIL PRESSURE SWITCH
OILP/W EC OIL PRESSURE WARNING
OVRCSV AT OVER RUN CLUTCH SOLENOID
VA LV E
PNP/SW AT PARK/NEUTRAL POSITION
SWITCH
PNP/SW EC NEUTRAL POSITION SWITCH
R/FOG EL REAR FOG LAMP
REMOTE EL AUDIO (REMOTE CONTROL
SWITCH)
S/LOCK EL POWER DOOR LOCK-SUPER
LOCK
S/SIG EC START SIGNAL
SROOF EL SUNROOF
SRS RS SUPPLEMENTAL RESTRAINT SYS-
TEM
SSV/A AT SHIFT SOLENOID VALVE A
SSV/B AT SHIFT SOLENOID VALVE B
WIRING DIAGRAM CODES (CELL CODES)
EL-326
http://vnx.su/

Code Section Wiring Diagram Name
START SC STARTING SYSTEM
STOP/L EL STOP LAMP
SWL/V EC SWIRL CONTROL VALVE CON-
TROL SOLENOID VALVE
TAIL/L EL PARKING, LICENSE, TAIL AND
STOP LAMPS
TCV AT TORQUE CONVERTER CLUTCH
SOLENOID VALVE
THEFT EL VEHICLE SECURITY (THEFT
WARNING) SYSTEM
THLCNT EC THROTTLE CONTROL SOLENOID
VA LV E
TURN EL TURN SIGNAL AND HAZARD
WARNING LAMPCode Section Wiring Diagram Name
TVC&SO EC TVC AND SHUT OFF
VNT EC VARIABLE NOZZLE TURBO-
CHARGER CONTROL SOLENOID
VA LV E
VSS EC VEHICLE SPEED SENSOR
VSSA/T AT VEHICLE SPEED SENSOR A/T
(REVOLUTION SENSOR)
VSSMTR AT VEHICLE SPEED SENSOR MTR
WARN EL WARNING LAMPS
WINDOW EL POWER WINDOW
WIP/R EL REAR WIPER AND WASHER
WIPER EL FRONT WIPER AND WASHER
WIRING DIAGRAM CODES (CELL CODES)
EL-327
http://vnx.su/

A
ABS (anti-lock brake system).........................BR-36
ABS - Wiring diagram ....................................BR-51
A/C air flow .......................................................HA-8
A/C compressor precaution..............................HA-5
A/C control operation (manual A/C) .................HA-6
A/C relay.........................................................HA-61
A/C symptom chart (manual A/C) ..................HA-36
A/C trouble diagnoses (manual A/C) .............HA-27
A/C, M - Wiring diagram ................................HA-43
ACC/SW - Wiring diagram ...........................EC-106
Accelerator control system ...........................FE-2, 5
Accelerator position sensor .........EC-130, 391, 394
Accelerator position switch ..................EC-392, 394
Accelerator switch (F/C) ...............................EC-104
Accelerator wire adjustment .............................FE-5
Accelerator work unit....................................EC-388
A/CCUT - Wiring diagram ............................EC-308
Air bag ..............................................................RS-8
Air bag disposal..............................................RS-22
Air bag precautions ...........................................GI-3
Air bleeding (hydraulic clutch) ..........................CL-6
Air bleeding for brake system ..........................BR-8
Air cleaner filter replacement ..............MA-5, 20, 24
Air conditioner cut control ..............EC-22, 334, 463
Air control cable adjustment...........................HA-62
Air flow meter - See Mass air flowsensor .................................................EC-88, 379
Alternator ........................................................SC-27
Angular tightening application..........................EM-3
Antenna.................................................EL-134, 150
Anti-lock brake system - See ABS .................BR-38
Anti-lock brake system - Wiring diagram .......................................................BR-51
APS - Wiring diagram ..................................EC-133
ASCD vacuum hose ......................................MA-40
A/T - Wiring diagram .........................................AT-7
A/T - Wiring diagram - AT - PNP/SW .............AT-89
A/T - Wiring diagram - AT - VSS A/T ..............AT-51
A/T control ....................................................EC-160
A/T diagnosis communication line ...............EC-160
A/T fluid checking ............................................AT-27
A/T fluid temperature sensor...........................AT-78
A/T mode switch..............................................AT-99
A/T self-diagnoses ....................................AT-14, 19
A/T Wiring diagram - AT - ENG SS ................AT-81
A/T Wiring diagram AT - BA/FTS ....................AT-77
A/T Wiring diagram AT - LPSV .......................AT-84
A/T Wiring diagram AT - OVRCSV .................AT-70
A/T Wiring diagram AT - SSV/A ......................AT-64
A/T Wiring diagram AT - SSV/B ......................AT-67
A/T Wiring diagram AT - TCV .........................AT-73
A/T Wiring diagram AT - TPS..........................AT-58
A/T Wiring diagram AT - VSSMTR .................AT-54
AT/C - Wiring diagram..................................EC-162
Audio .....................................................EL-134, 136
AUDIO - Wiring diagram ...............................EL-138 Audio and A/C control removal and
installation - See Instrument panel .............BT-16
Auto lock free running hub .............................FA-14
Automatic transmission number ......................GI-29
Axle housing (rear) ...........................................RA-8
B
Back Door .......................................................BT-14
Back door opener - See Back door ................BT-14
Back door trim.................................................BT-18
Back door window...........................................BT-43
Back-up lamp ..................................................EL-53
Back-up lamp switch (M/T) ........................MT-6, 10
BACK/L - Wiring diagram................................EL-53
Ball joint front axle ..........................................FA-36
Basic inspection .....................................EC-50, 361
Battery ..............................................................SC-3
Blower motor ..................................................HA-60
Blower resistor................................................HA-60
Body alignment ...............................................BT-49
BOOST - Wiring diagram .............................EC-222
Boring/horning cylinder block.........................EM-74
Brake booster .................................................BR-18
Brake fluid change ...........................................BR-5
Brake fluid level ...........................MA-17, 36, 40, 43
Brake fluid level and line check .......................BR-5
Brake hydraulic line......................................BR-5, 6
Brake inspection ..........................MA-36, 40, 41, 42
Brake lines and cables inspection.....MA-36, 40, 42
Brake lining wear temporary checking ....MA-36, 42
Brake master cylinder ....................................BR-17
Brake pedal ....................................................BR-14
Brake switch .................................................EC-423
BRK/SW - Wiring diagram ...........................EC-210
Bumper, front ....................................................BT-6
Bumper, rear .....................................................BT-8C
Camshaft ........................................................EM-30
Camshaft position sensor (PUMP)...............EC-166
Center case (Transfer) ......................................TF-9
CHARGE - Wiring diagram ............................SC-24
Charge air pressure sensor .........................EC-220
Charging system ............................................SC-23
Chassis and body maintenance ....................MA-36
CIGAR - Wiring diagram ...............................EL-123
Cigarette lighter.............................................EL-122
Circuit breaker.................................................EL-19
CKPS - Wiring diagram ................................EC-154
Clock .............................................................EL-122
CLOCK - Wiring diagram ..............................EL-124
Clutch cover ..............................................CL-11, 12
Clutch disc ......................................................CL-11
Clutch fluid level ......................................MA-17, 36
Clutch master cylinder ..................................CL-7, 8
Clutch pedal .............................................CL-3, 4, 5
ALPHABETICAL INDEX
IDX-2
http://vnx.su/

Clutch release mechanism ...............................CL-9
Coil spring (rear) ......................................RA-14, 16
Collision diagnosis..........................................RS-59
Combination lamp, front, removal andinstallation .....................................................BT-6
Combination lamp, rear, removal and installation .....................................................BT-8
Combination meter (needle type) ...................EL-84
Combination meter removal and instal- lation - See Instrument panel......................BT-16
Combination switch...................................EL-25, 26
Component Location (manual A/C) ..................HA-7
Compression pressure ...................................EM-10
Compressor mounting ....................................HA-21
Connecting rod...............................................EM-73
Connecting rod bearing clearance.................EM-77
Connecting rod bushing clearance ................EM-73
Console box - See Instrument panel ..............BT-16
CONSULT for ABS .........................................BR-59
CONSULT for engine .............................EC-39, 350
CONSULT-II general information.....................GI-26
Control lever (M/T) .........................................MT-13
Control lever (Transfer) .....................................TF-8
Control sleeve position sensor .....................EC-437
Control valve (A/T) ........................................AT-118
COOL/F - Wiring diagram ............................EC-112
Coolant mixture ratio ...................MA-17, 20, 22, 31
Coolant replacement ...............MA-5, 17, 20, 22, 31
Cooling circuit (engine)...............................LC-9, 27
Cooling fan ...............................................LC-15, 33
Cooling fan control .......................................EC-109
Cooling fan relay ..........................................EC-449
Corrosion protection..........................................BT-5
Counter gear (M/T) .........................................MT-11
Counter gear (Transfer) ............................TF-10, 20
Cowl top ..........................................................BT-21
Cowl top cover ................................................BT-21
Crankcase emission control system - See positive crankcase ventilation .....EC-23, 335
Crankcase ventilation system - See Positive crankcase ventilation ............EC-23, 335
Crankshaft ......................................................EM-76
Crankshaft position sensor (TDC) .......EC-152, 408
Cylinder block ................................................EM-66
Cylinder head .................................................EM-52
D
Data link connector ................................EC-39, 350
Daytime light system ..........................EL-32, 33, 34
DEF - Wiring diagram ...................................EL-126
Defroster door control rod adjustment ...........HA-62
Diagnosis sensor unit .....................................RS-13
Diagnostic trouble code (DTC) for OBDsystem ................................................EC-33, 344
Differential carrier assembly ....................PD-29, 53
Differential carrier disassembly..........PD-18, 38, 40
Differential gear oil replacement .......MA-36, 38, 39
Dimensions ......................................................GI-30 D/LOCK - Wiring diagram .............................EL-166
Door glass .......................................................BT-10
Door lock .........................................................BT-10
Door mirror ......................................................BT-48
Door trim .........................................................BT-19
Door, front .......................................................BT-10
Door, rear ........................................................BT-12
Drive belt inspection ................................MA-20, 28
Drive chain (Transfer) .....................................TF-10
Drive pinion diff. inspection ......................PD-20, 42
Drive pinion height ...................................PD-21, 49
Drive plate runout ..........................................EM-94
Drive shaft ........................................................MA-5
Drive shaft (front)..................................FA-4, 12, 22
Driver air bag..................................................RS-16
Dropping resistor (A/T)....................................AT-88
Dual pressure switch (component
inspection) ..................................................HA-61
Dual pressure switch (description) ...................HA-9
E
ECM input/output signal .........................EC-69, 369
ECM relay ......................................EC-80, 214, 376
ECMRLY - Wiring diagram ...........................EC-215
ECTS - Wiring diagram ..................................EC-96
EGR control (EGRC) - solenoid valve .........EC-454
EGR control valve ........................................EC-462
EGR volume control valve ...........................EC-227
EGVC/V - Wiring diagram ............................EC-230
Electrical unit ................................................Foldout
Electronic fuel injection pump ......................EC-341
Engine compartment .......................................BT-50
Engine control circuit diagram ...............EC-16, 325
Engine control component partslocation ...............................................EC-12, 323
Engine control module (ECM) ......EC-69, 121, 205, 207, 218, 369, 430,
467
Engine control system diagram and chart....................................................EC-17, 326
Engine coolant temperature sensor (ECTS)................................................EC-95, 384
Engine oil filter replacement..........MA-5, 20, 21, 30
Engine oil precautions .......................................GI-6
Engine oil replacement ......................MA-20, 21, 29
Engine removal ..............................................EM-63
Engine room - See Engine compartment ...............................................BT-50
Engine serial number ......................................GI-29
Exhaust manifold ...........................................EM-18
Exhaust system ..........................................FE-4, 10
Exhaust system inspection ............................MA-36
Extension tube diff. ..................................PD-19, 28
Exterior ............................................................BT-21
Exterior lamp ...................................................EL-49
ALPHABETICAL INDEX
IDX-3
http://vnx.su/