1995 NISSAN ALMERA N15 display

ConfirmSELF-DIAGNOSTIC
RESULTS "CHAINOFIMMU-
KEY" displayed onCONSULT
screen.

Self-diagnostic
results:
"CHAIN OFIMMU-KEY" displayedonCONSULT screen

m

00

NATS
(Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)

DIAGNOSTIC PROCEDURE 5
• SELF-DIAG RESULTS.
0

FAILURE DETECTED TIME
CHAIN OFIMMU-KEY 0

•

Communication
lineis
short-circuited withbat-
tery voltage lineorigni-
tion switch "ON"line.
Repair harness orcon-
nectors.
Power source lineis
open circuit.
Repair harness orcon-
nector.

Ref. part No.E3

Communication
lineis
short-circuited with
ground line.
Repair harness orcon-
nectors.
Check
harness andcon-
nectors.
If NG, repair harness or
connectors.
NG
NG
NG

NG

IMMU NAT8
antenna Ref.part
terminal amp.
terminal No.

@
@

E1

@
~)
E2

IMMU
NA
T8 antenna Ref.part
terminal amp.terminal No.

@
@
E1

@
~
E2

IMMU NAT8
antenna Ref.part
terminal amp.
terminal No.

@
@
E1

@
~
E2

OK
CHECK
ANTENNA AMP.POWER
SOURCE CIRCUIT.
1) Connect IMMUconnector.
2) Check voltage between NATS
antenna amp.terminal G)and
ground.

Voltage: Morethan4.7V

Check
voltage between thefollowing
terminals andground.

Continuity
shouldnotexist.

Check
continuity betweenthefollowing
terminals andground.
CHECK
ANTENNA AMP.CIRCUIT.
1) Disconnect IMMUconnector and
NATS antenna amp.connector.
2) Check continuity betweenthefollow-
• ing IMMU terminals andNATS
antenna amp.terminals.

Voltage: OV
Continuity
shouldexist.

SEL482U
NATS antenna amp.
connector~

~~i5

NATS antenna amp.
connector~
IMMU
connector@
SEL483U

~,34=@
~

: ,I~~

I
I III
[ill

I III ~..
I III
I III
I ,•

'
__
.-
..
-.
__
~
ERASE
"PRINT
I
1:1.

SEL373U W
NATS antenna amp.
connector~
IMMU
NATSantenna amp.
connector
@
connector~~

r=am
T6

: t::~

I I"
flTl

, II'L!.-J

I II•
, II,

.------_
....
----_........
-
~
SEL484U
IMMU
connector@

ma,
~~fJ

[ill

SEL485U EL-261

SEL490U
IMMU
connector@
NATS
(Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)

CID

II
1

CHECK IMMUFUNCTION 2. NG
Replace IMMU.
1) Disconnect NATSantenna amp.con-
r---+

Ref.part No.A
nector.

1

2)
Turn ignition switch"ON".
3) Check voltage between IMMUtermi-
nal
@
and ground.

00
Perform
initialisa-
Voltage: tion
with CON-
6 sec. after turning ignition switch SULT.
"ON" Fortheoperation
Approx. 4.5-5V of
initialisation,
refer to"CON-
OK SULToperation
manual NATS
V2.0".
NATS antenna amp.ismalfunctioning.
When replacing theamp. holdonto
amp. body. Takecarenottopull on
amp. harness.
Ref. part No.E6
DIAGNOSTIC PROCEDURE6
*"10 DISCORD, IMM-ECM":
Registered IDofIMMU is
in discord withthatof
ECM.
Confirm
SELF-DIAGNOSTIC
RESULTS "10DISCORD, IMM-
ECM*" displayed onCONSULT
screen.

Self-diagnostic
results:
"ID DISCORD, IMM-ECM" displayedonCONSULT screen

m

00

•
SELF-DIAG RESULTS.
0

FAILURE DETECTED TIME
ID DISCORD,IMM-ECM 0
ERASE
II
PRINT

I

SEL383U

[;]
•
C/U
INITIALISATION

•

INITIALISATION
STOPPED orFAILED
TURN IGNKEY SW"OFF"
AND "ON", AFTER CON-
FIRMING SELF-DIAG
RESULTS, PERFORM C/U
INITIALISATION AGAIN.
ERASE
II
PRINT

I

SEL372U Perform
initialisation withCON-
SULT .
Re-register allNATS ignition key
IDs.
For theoperation ofinitialisation,
refer to"CONSULT operation
manual NATSV2.0".
Initialisation
completed
Start engine.
END
Ref. part No.F Initialisation
[;]
incompleted -
or failed ECMismalfunc-
with CON- tioning.
SUL T ReplaceECM.
Ref. part No.F
Perform initialisa-
tion with CON-
SULT.
For theoperation
of initialisation,
refer to"CON-
SUL Toperation
manual NATS

V2.0".
•

EL-263

Self-diagnosticresults:
"MINGLE NOISE"displayed onCONSULT screen

m
T
Confirm SELF-DIAGNOSTIC RESULTS"MINGLENOISE"dis-
~ played onCONSULT screen.

NATS
(Nissan Anti-Theft System)
Trouble Diagnoses (Cont'd)
DIAGNOSTIC PROCEDURE 7

• SELF.DIAG RESULTS.
0

FAILURE DETECTED TIME
MINGLE NOISE 0

ERASE
II
PRINT
I
Turnofforremove anypossible noisesources.

SEL384U

• SELF.DIAG RESULTS.
0

FAILURE DETECTED TIME
MINGLE NOISE 0 Touch
"ERASE" onCONSULT SELF-DIAGNOSTIC RESULTS
screen.

ER~I PRINT
I

SEL385U
Start
engine.

OK

END
NG
DIAGNOSTIC PROCEDURE8
"NATS SECURITY IND.DOES NOTLIGHT UP"

m

o
UP

SIDE I~

....

EE3J

7.5A

SEL491U
Check
fuse(7.5A) inthe fuse box.

OK

NATS INITIALISATION
1) Fix the 7.5A fuseshown left

m.

2) Perform initialisation with
CONSULT.
For theoperation of
initialisation, referto"CON-
SUL Toperation manualNATS
V2.0".
NG

Replace fuse.
Turn ignition switch"OFF".
Start engine andturn ignition switch

"OFF".

Check NATSsecurity indoblinking.
OK

END

NG
EL-264

PRECAUTIONSANDPREPARATION
I
GA, SR
I

Precautions (Cont'd)

• Before replacing ECM,perform Terminals andReference
Value inspection andmake sureECM functions properly.
Refer toEC-281 forSR engine modelandEC-78 forGA
engine model.

/
"

MEF040D
\ I/

'~/"

- CHECK-

/
.......

/
,
\

SEF051P

NG

@~ )

~K

Circuit tester
.1

SEF34BN
•
After performing eachTROUBLE DIAGNOSIS, perform
"OVERALL FUNCTIONCHECK"or"DTC (Diagnostic Trou-
ble Code) CONFIRMATION PROCEDURE".
The DTC should notbedisplayed inthe "DTC CONFIRMA-
TION PROCEDURE" ifthe repair iscompleted. The"OVER-
ALL FUNCTION CHECK"shouldbeagood result ifthe
repair iscompleted.
• When measuring ECMsignals withacircuit tester, never
allow thetwo tester probes tocontact.
Accidental contactofprobes willcause ashort circuit and
damage theECM power transistor.

EC-10

ON-BOARDDIAGNOSTIC SYSTEMDESCRIPTION @KJ

Malfunction Indicatorlamp(Mil)(Cont'd)

DIAGNOSTIC TESTMODE I-BULB CHECK

In this mode, theMALFUNCTION INDICATORLAMPonthe instrument panelshould stayON.Ifitremains
OFF, check thebulb. Refer toEL section ("WARNING LAMPSANDCHIME") orsee EC-223.

DIAGNOSTIC TESTMODE I-MALFUNCTION WARNING
MALFUNCTION INDICATORLAMP
ON
OFF Condition
Engine coolant temperature sensorcircuitmalfunction oroverheating isdetected, or
the ECM's CPUismalfunctioning.
No malfunction.

• These Diagnostic TroubleCodeNumbers areclarified inDiagnostic TestMode II(SELF-DIAGNOS-
TIC RESULTS).

DIAGNOSTIC TESTMODE II-SELF-DIAGNOSTIC RESULTS

In this mode, adiagnostic troublecodeisindicated bythe number ofblinks ofthe MALFUNCTION INDI-
CATOR LAMPasshown below.

Example: Diagnostic troublecodeNo.12and No.43

ON
0.6
03

111-'1
0.6

II
0.3
OFF
j
~

~~ -I.
--.1
-4--1--

Q9 O~ 21 OB Q9

'--------v----' '--------v------~

Diagnostic troublecodeNo.12 DiagnostictroublecodeNo.43
2.1
Unit:second
AEC490
• SELF-DIAG RESULTS.
0

FAILURE DETECTED TIME
NATS MALFUNCTION
0

I
ERASE

II
PRINT

I

SEF288Q

Long
(0.6second) blinkingindicates thenumber often digits, andshort (0.3second) blinkingindicates
the number ofsingle digits. Forexample, themalfunction indicatorlampblinks 4times forabout 2.5
seconds (0.6secx4 times) andthen itblinks threetimes forabout 1second (0.3secx3 times). This
indicates theDTC "43" andrefers tothe malfunction ofthe throttle position sensor.
In this way, allthe detected malfunctions areclassified bytheir diagnostic troublecodenumbers. The
DTC "55" refers tono malfunction. (SeeDIAGNOSTIC TROUBLECODECHART, refertoEC-62.)

HOW TOERASE DIAGNOSTIC TESTMODE II(Self-diagnostic results)

The diagnostic troublecodecanbeerased fromthebackup memory inthe ECM when thediagnostic
test mode ischanged fromDiagnostic TestMode IIto Diagnostic TestMode
I.
(Refer to"HOW TO
SWITCH DIAGNOSTIC TESTMODES" onprevious page.)

• Ifthe battery terminal isdisconnected, thediagnostic troublecodewillbelost from thebackup
memory within24hours.
• Becareful nottoerase thestored memory before
startin~
troublediagnoses.

• If
the MIL blinks or"NATS MALFUNCTION" isdisplayed on
"SELF-OIAG RESULTS"screen,perform self-diagnostic
results modewithCONSULT usingNATS program card
(NATS-E940). RefertoEL section.
• Confirm noself-diagnostic resultsofNATS isdisplayed
before touching "ERASE" in"SELF-DIAG RESULTS"mode
with CONSULT.
• When replacing ECM,initialisation ofNATS V2.0system and
registration ofall NATS V2.0ignition key10smust becar-
ried outwith CONSULT usingNATS program card(NATS-
E940).
Therefore, besure toreceive allkeys from vehicle owner.
Regarding theprocedures ofNATS initialisation andNATS
ignition key10registration, refertoCONSULT operation
manual, NATS V2.0.
EC-46

ON-BOARDDIAGNOSTIC SYSTEMDESCRIPTION
[QKJ

Malfunction Indicatorlamp(Mil)(Cont'd)

DIAGNOSTIC TESTMODE II-OXYGEN SENSOR*1MONITOR

In this mode, theMALFUNCTION INDICATORLAMPdisplays thecondition ofthe fuel mixture (leanor
rich) which ismonitored bythe oxygen sensor*1.

MALFUNCTION INDICATORLAMPFuelmixture condition inthe exhaust gas
Airfuel ratio feedback controlcondition
ON Lean
OFF RichClosed
loopsystem
*2 Remains ONorOFF Anycondition
Openloopsystem
*2: Maintains conditions justbefore switching toopen loop.

To check theoxygen sensor*1 function,startengine inDiagnostic TestMode II.Then warm itup until
engine coolant temperature indicatorpointstomiddle ofgauge. •
Next runengine atabout 2,000rpmforabout 2minutes underno-load conditions. Makesurethatthe
MALFUNCTION INDICATORLAMPcomes ONmore than5times within 10seconds withengine running
at 2,000 rpmunder no-load. .

*1: Heated oxygen sensor(ForEurope andIsrael, andAustralia
AfT
models)
Oxygen sensor(Except forEurope andIsrael, andAustralia
AfT
models)

EC-47

ON-BOARDDIAGNOSTIC SYSTEMDESCRIPTION
CONSULT (ConI'd)
SELF-DIAGNOSTIC MODE
Regarding itemsdetected in"SELF-DIAG RESULTS"mode,referto"Diagnostic TroubleCode(DTC)
Chart" (RefertoEC-62.)
DATA MONITOR MODE

Monitored item ECM
Main
[Unit] input
signals Description
Remarks
signals
CMPS.RPM •Indicates theengine speedcomputed •Accuracy becomespoorifengine
(REF) [rpm]

00
from
theREF signal (180'signal) of
speeddropsbelow theidle rpm.
the camshaft positionsensor.
•Ifthe signal isinterrupted whilethe
engine isrunning, anabnormal value
may beindicated .
MAS AIR/FL SE[V]

0 0
•
The signal voltage ofthe mass air
•When theengine isstopped, acertain
flow sensor isdisplayed .
valueisindicated.
COOLAN TEMP/S
•The engine coolant temperature •When theengine coolant temperature
['C] or['F]

00
(determined
bythe signal voltage of
sensorisopen orshort-circuited,
the engine coolant temperature sen-ECMenters fail-safe mode.The
sor) isdisplayed.
enginecoolant temperature deter-
mined bythe ECM isdisplayed .
02 SENSOR [V]

00
•
The signal voltage ofthe oxygen sen-
sor*1 isdisplayed .
M/R F/CMNT •
Display ofoxygen sensorsignaldur-
•After turning ONthe ignition switch,
[RICH/LEAN] ingair-fuel ratiofeedback control: "RICH"isdisplayed untilair-fuel mix-
RICH ...means themixture became
tureratio feedback controlbegins.

0 0
"rich",
andcontrol isbeing affected •When theair-fuel ratiofeedback is
toward aleaner mixture.
clamped,thevalue justbefore the
LEAN ...means themixture became clampingisdisplayed continuously.
"lean", andcontrol isbeing affected
toward arich mixture .
VHCL SPEED SE

00
•
The vehicle speedcomputed fromthe
[km/h] or[mph] vehicle
speedsensor signalisdis-
played .
BATTERY VOLT[V]

0 0
•
The power supply voltage ofECM is
displayed .
THRTL POSSEN[V]

0 0
•
The throttle position sensorsignal
voltage isdisplayed.
INT/A TEMP SE['C] •The intake airtemperature deter-
or ['F]*2

0
mined
bythe signal voltage ofthe
intake airtemperature sensorisindi-
cated .
START SIGNAL

00
•
Indicates [ON/OFF] conditionfromthe•After starting theengine, [OFF]isdis-
[ON/OFF] startersignal. playedregardless ofthe starter sig-
nal.
CLSD THLIPOSI •Indicates theclosed throttle position
[ON/OFF]

00
[ON/OFF]
determined bythe throttle
position sensorsignal.
ON: Closed throttle position
OFF: Other thanclosed throttle position
AIR COND SIG

00
•
Indicates [ON/OFF] conditionofthe
[ON/OFF] air
conditioner switchasdetermined
by the airconditioning signal.
PIN POSI SW

00
•
Indicates [ON/OFF] conditionfromthe
[ON/OFF] park/neutralpositionswitchsignal.
PW/ST SIGNAL •
Indicates [ON/OFF] conditionofthe
[ON/OFF]
00
power
steering oilpressure switch
determined bythe power steering oil
pressure signal.

NOTE:
Any monitored itemthatdoes notmatch thevehicle beingdiagnosed isdeleted fromthedisplay auto-
matically.

*1: Heated oxygen sensor(ForEurope andIsrael, andAustralia A/Tmodels)
Oxygen sensor(Except forEurope andIsrael, andAustralia A/Tmodels)
*2: For Australia

EC-51
•

ON-BOARDDIAGNOSTIC SYSTEMDESCRIPTION
CONSULT (Coni'd)

Monitored item
ECM
Main
[Unit] input
signals Description
Remarks
signals
LOAD SIGNAL •Indicates [ON/OFF] conditionfromthe
[ON/OFF] reardefogger signaland/or lighting
switch.

0 0
ON:
Rear defogger isoperating
and/or lighting switchison.
OFF: Rear defogger isnot operating
and lighting switchisnot on.
INJ PULSE [msec]

0
•
Indicates theactual fuelinjection
•When theengine isstopped, acertain
pulse widthcompensated byECM computedvalueisindicated.
according tothe input signals.
IGN TIMING [BTDC]

0
•
Indicates theignition timingcomputed
by ECM according tothe input sig-
nals.
IACV-AACIV
[%]

•Indicates theidle aircontrol valve

0
(AAC
valve) control valuecomputed
by ECM according tothe input sig-
nals.
A/F ALPHA
[%]

•Indicates themean valueofthe air-
•When theengine isstopped, acertain

0
fuel
ratio feedback correction factor valueisindicated.
per cycle. •This data alsoincludes thedata for
the air-fuel ratiolearning control.
AIR COND RLY

0
•
Indicates theairconditioner relay
[ON/OFF] controlcondition (determined byECM
according tothe input signal).
COOLING FAN*2
•Indicates thecontrol condition ofthe
[ON/OFF] or[LOW/
coolingfans(determined byECM
HI/OFF]

0
according
tothe input signal).
ON ...Operating
LOW ...Operates atlow speed
HI ...Operates athigh speed
OFF ...Stopped
FUEL PUMP RLY

0
•
Indicates thefuel pump relaycontrol
[ON/OFF] conditiondetermined byECM accord-
ing tothe input signals.
VALVE TIMSOL*1
•The control condition ofthe valve tim-
[ON/OFF] ingsolenoid valve(determined by
ECM according tothe input signal) is
indicated.
ON ...VTC operating
OFF ...VTC notoperating
EGRC SOLIV (EVAP
•Indicates thecontrol condition ofthe
canister purgecon-
EVAPcanister purgecontrol solenoid
trol solenoid valve valveorEGR valve
&
EVAP canister
or EGR
&
EVAP can- purgecontrol solenoid valve(deter-
ister purge control

0
mined
byECM according tothe input
solenoid valve) signal).
[ON/OFF] ON'"EVAP canister purgeoperation
cut-off OFF ...EVAP canister purgeoperation
not cut-off
VOLTAGE •Voltage measured bythe voltage
[V] probe.
PULSE •Pulse width, frequency orduty cycle •Only "#"isdisplayed ifitem is
[msec] or[Hz] or measuredbythe pulse probe. unable
tobe measured .

[%]
•
Figures with"#"s aretemporary
ones. Theyarethesame figures as
an actual pieceofdata which wasjust
previously measured.
*1: GA16DE exceptforEurope andIsrael
*2: GA16DE engineA/Tmodels forEurope without heavydutykithave a2- step control [ON/OFF] system."LOW"and"HI"
are shown onCONSULT screentorepresent "ON"condition.

EC-52