2002 NISSAN TERRANO engine control

System Description
NATS has the following immobiliser functions:
IThis version of NATS has dongle control unit to improve its anti-theft performance (RHD models). Dongle
control unit has its own ID which is registered into NATS IMMU. So if dongle unit is replaced, initialization
must be carried out.
IWhen malfunction of dongle unit is detected:
The security indicator lamp illuminates for about 15 minutes after ignition switch is turned to ON.
Ð When dongle control unit has a malfunction, and the indicator lamp is illuminated, engine can not be
started. However engine can be started only one time when security indicator lamp turns off in about
15 minutes after ignition switch is turned to ON.
ISince only NATS ignition keys, whose ID nos. have been registered into the ECM and IMMU of NATS,
allow the engine to run, operation of a stolen vehicle without a NATS registered key is prevented by NATS.
That is to say, NATS will immobilize the engine if someone tries to start it without the registered key of
NATS.
IAll of the originally supplied ignition key IDs have been NATS registered.
If requested by the vehicle owner, a maximum of five key IDs can be registered into the NATS compo-
nents.
IThe NATS security indicator (NATS security ind.) blinks when the ignition switch is in ªOFFº or ªACCº
position. Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system.
IWhen NATS detects trouble, the security indicator lamp lights up as follows.
Condition IGN ON andWith dongle Without dongle
MIL Security indicator MIL Security indicator
NATS malfunction
(except dongle control
unit) is detectedÐ 6 times blinking
Staying ON after ignition
switch is turned ONÐ Staying ON
Only malfunction of
dongle control unit is
detected.Ð Staying ON for about 15
minutes after ignition
switch is turned ONÐÐ
Malfunction of NATS and
engine related parts are
detected.Staying ON 6 times blinking
Staying ON after ignition
switch is turned ONStaying ON Staying ON
Only engine related part
malfunction is detected.Staying ON Ð Staying ON Ð
Just after initialization of
NATSÐ 6 times blinking Ð Ð
INATS trouble diagnoses, system initialisation and additional registration of other NATS ignition key IDs
must be carried out using CONSULT-II hardware and CONSULT-II NATS software.
Regarding the procedures of NATS initialisation and NATS ignition key ID registration, refer to CONSULT-II
operation manual, NATS.
IWhen servicing a malfunction of the NATS (indicated by lighting up of security Indicator Lamp) or
registering another NATS ignition key ID no., it may be necessary to re-register original key iden-
tification. Therefore, be sure to receive all keys and the PIN code from vehicle owner.
NATS (Nissan Anti-Theft System)
EL-186

System Composition
The immobiliser function of the NATS for Nissan model R20 consists of the following:
INATS ignition key
INATS immobiliser control unit (NATS IMMU), located in the ignition key cylinder
IEngine control module (ECM)
IDongle control unit (RHD models)
INATS security indicator
INATS audio link
YEL349D
NATS (Nissan Anti-Theft System)
EL-187

Trouble Diagnoses
WORK FLOW
CHECK IN
Listen to customer complaints or request. (Get symptoms)
TROUBLEKEY SERVICE REQUEST (Additional key ID registration)H
Verify the security indicator and MI*.INITIALISATION
(Refer to CONSULT-II operation
manual NATS.)
EUsing the CONSULT-II program card for NATS check the
ªSELF-DIAG RESULTSº with CONSULT-II.F
Self-diagnostic results referring to NATS, but no information
about engine self-diagnostic results is displayed on CONSULT-
II.
Turn ignition switch ªOFFº.
Repair NATS.
(If necessary, carry out ªC/U INITIALIZATIONº with CONSULT-
II.)
Turn ignition switch ªONº.
Erase the NATS ªSELF-DIAG RESULTSº by using CONSULT-
II. (Touch ªERASEº.)
Start the engine.
NGVerify no lighting up of the security indicator.
OK
CHECK OUT
Perform running test with CONSULT-II in engine ªSELF-DIAG
RESULTSº mode.
NGVerify ªNO DTC IS DETECTEDº displayed on the CONSULT-II
screen.
OK
CHECK OUT
Self-diagnostic results referring to NATS and ªDON'T
ERASE BEFORE CHECKING ENG DIAGº are displayed on
CONSULT-II.
(This means that engine trouble data has been detected in
ECM.)
Turn ignition switch ªOFFº.
Repair NATS according to self-diagnostic results referring to
NATS.
(If necessary, carry out ªC/U INITIALIZATIONº with CON-
SULT-II.)
Do not erase the NATS ªSELF-DIAG RESULTSº by using
CONSULT-II.
Check the engine ªSELF-DIAG RESULTSº with CONSULT-II
by using the CONSULT-II generic program card.
(Engine diagnostic software included)
OK
F
Repair engine control system (Refer to EC section.) when
self-diagnostic results except ªNATS MALFUNCTIONº are
detected. When only ªNATS MALFUNCTIONº is detected,
erase the self-diagnostic results and go to the next step.
Start the engine. Does the engine start properly?NG
Erase the NATS and engine ªSELF-DIAG RESULTSº by
using the CONSULT-II program card for NATS and generic
program card.
Start the engine.
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NATS (Nissan Anti-Theft System)
EL-195

SYMPTOM MATRIX CHART 1
(Self-diagnosis related item)
SYMPTOMDisplayed ªSELF-DIAG
RESULTSº on
CONSULT-II screenDIAGNOSTIC
PROCEDURE
(Reference page)SYSTEM
(Malfunctioning part or mode)REFERENCE PART NO.
OF ILLUSTRATION ON
NEXT PAGE
ISecurity indicator light-
ing up*
IEngine does not startECM INT CIRC-IMMUPROCEDURE 1
(EL-198)ECM B
ISecurity indicator light-
ing up*
IEngine does not startCHAIN OF ECM-IMMUPROCEDURE 2
(EL-199)Open circuit in battery voltage line
of IMMU circuitC1
Open circuit in ignition line of IMMU
circuitC2
Open circuit in ground line of IMMU
circuitC3
Open circuit in communication line
between IMMU and ECMC4
Short circuit between IMMU and
ECM communication line and bat-
tery voltage lineC4
Short circuit between IMMU and
ECM communication line and
ground lineC4
ECM B
IMMU A
DIFFERENCE OF KEYPROCEDURE 3
(EL-201)Unregistered key D
IMMU A
CHAIN OF IMMU-KEYPROCEDURE 4
(EL-202)Malfunction of key ID chip E
IMMU A
Open circuit in ground line of
dongle circuitC6
Open or short circuit in communica-
tion line between IMMU and dongle
control unitC5
Dongle control unit G
ID DISCORD, IMM-ECMPROCEDURE 5
(EL-204)System initialisation has not yet
been completed.F
ECM B
LOCK MODEPROCEDURE 7
(EL-206)LOCK MODE D
IMI staying ON
ISecurity indicator light-
ing up*DON'T ERASE BEFORE
CHECKING ENG DIAGWORK FLOW
(EL-195)Engine trouble data and NATS
trouble data have been detected in
ECM.Ð
*: When NATS detects trouble, the security indicator lights up while ignition key is in the ªONº position.
*: When the vehicle is equipped with dongle control unit (RHD models), the security indicator blinks 6 times just after ignition switch is turned
to ON. Then the security indicator lights up while ignition key is in the ªONº position.
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-196

qA
CHECK HARNESS CONNECTOR CON-
NECTION.
Check the following harness connector
connection.
M720
Does the engine start?
No
EYe s
System is OK.
(The malfunction is caused
by improper connector
connection.)
CHECK GROUND CIRCUIT FOR
DONGLE UNIT.
Check continuity between dongle control
unit terminalq
3and ground.
Continuity should exist.
Ye s
ENo
Repair harness.
CHECK INTERFACE CIRCUIT.
1. Check continuity between IMMU termi-
nalq
2and dongle control unit terminal
q
5(Open circuit check)
Continuity should exist.
2. Check continuity between IMMU termi-
nalq
2and ground. (Short circuit check)
Continuity should not exist.
Ye s
ENo
Repair harness.
Dongle unit is malfunctioning.
1. Replace dongle control unit.
2. Perform initialisation with CONSULT-II.
For the initialisation procedure, refer to
ªCONSULT-II operation manual NATSº.
YEL327D
YEL328D
YEL329D
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NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
EL-203

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 time
control 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)]
Ito combination meter (security indicator lamp) terminalq
27.
Power is supplied at all times
Ithrough 10A fuse [No.
5, located in the fuse block (J/B)]
Ito time control unit terminal
U09.
With the ignition switch in the ON or START position, power is supplied
Ithrough 10A fuse [No.
26, located in the fuse block (J/B)]
Ito time control unit terminal
U01.
Ground is supplied
Ito 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
Ifrom the hood switch
Ithrough body grounds
M33andM754.
THEFT WARNING SYSTEM
System Description (Cont'd)
EL-211

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
1STSIG AT A/T 1ST. SIGNAL
2NDSIG AT A/T 2ND. SIGNAL
3RDSIG AT A/T 3RD. SIGNAL
4THSIG AT A/T 4TH. SIGNAL
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)
ACL/SW ECACCELERATOR POSITION
SWITCH
APS AT, ECACCELERATOR POSITION SEN-
SOR
AT/C EC A/T CONTROL
AUDIO EL AUDIO
BA/FTS ATA/T FLUID TEMPERATURE SEN-
SOR AND TCM POWER SUPPLY
BACK/L EL BACK-UP LAMP
BOOST ECTURBOCHARGER BOOST SEN-
SOR
BRK/SW EC BRAKE SWITCH
CHARGE SC CHARGING SYSTEM
CHIME EL WARNING CHIME
CIGAR EL CIGARETTE LIGHTER
CKPS ECCRANK 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 ELHEADLAMP Ð WITH DAYTIME
LIGHT SYSTEM
ECMRLY EC ECM RELAY
ECTS ECENGINE COOLANT TEMPERA-
TURE SENSOR
EGRC/V ECEGR 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
Code Section Wiring Diagram Name
FTS ATA/T FLUID TEMPERATURE SEN-
SOR
GLOW EC QUICK GLOW SYSTEM
H/AIM ELHEADLAMP AIMING CONTROL
SYSTEM
H/LAMP EL HEADLAMP
HEATER HA HEATER SYSTEM
HEATUP EC HEAT UP SWITCH
HLC EL HEADLAMP CLEANER
HORN EL HORN
HSEAT EL HEATED SEAT
ILL EL ILLUMINATION
INJPMP ECELECTRONIC CONTROL FUEL
INJECTION PUMP
INT/L EL INTERIOR AND MAP LAMPS
INT/V ECINTAKE AIR CONTROL VALVE
CONTROL SOLENOID VALVE
LPSV ATLINE PRESSURE SOLENOID
VA LV E
MAFS EC MASS AIR FLOW SENSOR
MAIN ATMAIN POWER SUPPLY AND
GROUND CIRCUIT
MAIN ECMAIN POWER SUPPLY AND
GROUND CIRCUIT
METER ELSPEEDOMETER, TACHOMETER,
TEMP. AND FUEL GAUGES
MIL/DL ECMIL AND DATA LINK CONNEC-
TORS
MIRROR EL DOOR MIRROR
MULTI ELREMOTE 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
OVRCSV ATOVER RUN CLUTCH SOLENOID
VA LV E
PNP/SW ATPARK/NEUTRAL POSITION
SWITCH
PNP/SW EC NEUTRAL POSITION SWITCH
R/FOG EL REAR FOG LAMP
REMOTE ELAUDIO (REMOTE CONTROL
SWITCH)
S/LOCK ELPOWER DOOR LOCK-SUPER
LOCK
S/SIG EC START SIGNAL
WIRING DIAGRAM CODES (CELL CODES)
EL-291

Trouble diagnosis of turbocharger
Preliminary check:
Check that the VNT control valve system has no malfunction. Refer
to EC section, ªECM Terminals and Reference Valueº in ªTROUBLE
DIAGNOSIS Ð GENERAL DESCRIPTIONº.
ICheck that the engine oil level is between MIN and MAX of the
dipstick. (When the engine oil amount is more than MAX, the
oil flows into the inlet duct through the blow-by gas passage,
and the turbocharger is misjudged failure.)
IAsk the customer if he/she always runs the vehicle in idle
engine speed to cool the oil down after driving.
IReplace the turbocharger assembly when any malfunction is
found after unit inspections specified in the table below.
IIf no malfunction is found after the unit inspections, judge that
the turbocharger body has no failure. Check the other parts
again.
Inspection item Inspection resultSymptom (when each inspection item
meets each inspection result)
Oil leak-
ageSmoke NoiseInsuffi-
cient
power/
accel-
eration
failure
Turbine wheelOil leaks.g
gg
Carbon is accumulated.g
qq
Friction with housing.gq
q
Blades are bent or broken.
Compressor wheelInside the air inlet is seriously contami-
nated by oil.qq
Friction with housing.gqq
Blades are bent or broken.
After checking both turbine and compressor,
inspect rotor shaft end play.There is resistance when the rotor shaft
is rotated by your fingertips.ggq
The rotor shaft sometimes does not
rotate by your fingertips.
There is too much play in the bearing.ggqg
Oil return portCarbon or sludge is accumulated in the
waste oil hole.g
gg
Operation of VNT control actuatorIThe actuator does not operate
smoothly when vacuum pressure is
gradually applied.
IStroke amount is not in compliance
with the vacuum pressure.q
: Large possibility
q: Medium possibility
g: Small possibility
INSTALLATION
1. Install catalyst.
:29-39N×m (2.9 - 3.3 kg-m, 21 - 23 ft-lb)
Place the protruding area of the gasket between the turbocharger
and the exhaust outlet upwards, and install the lipped side to the
turbocharger side. Refer to the figure, EM-14.
2. Install in the reverse order of removal.
CATALYST AND TURBOCHARGERZD
Inspection (Cont'd)
EM-17