1995 NISSAN ALMERA N15 check engine

•

INSPECTION
START

m
CHECK VACUUM SOURCETOEVAP OK
CHECK COMPONENT
CANISTER.
L---.

(EVAPcanister).
1. Jack updrive wheels. (See
page EC-29.)
2. Start engine andwarm itup suffi- If
NG, replace EVAPcan-
ciently. ister.
3. Perform diagnostic testmode II(Self-
diagnostic results).Makesurethat
9iagnostic troublecodeNo.55isdis-
played.
4. Disconnect vacuumhosetoEVAP
canister.
5. Set shift lever to1st position.
6. Make surethatvacuum existsunder
the following conditions.

At Idle:
Vacuum shouldnotexist.
Racing enginefromIdleto3,000 rpm:
Vacuum shouldexist.

NG

Ii)
[!J

CHECK CONTROL FUNCTION. OK
Check vacuum hosefor
1. Check voltage between ECMterminal
--..

clogging, cracksor

@
andground withCONSULTor improperconnection.
tester underthefollowing conditions.

Voltage: At idle
Approximately OV
Engine speedisabout 2,000rpm
Battery voltage

NG

I!l
CHECK POWER SUPPLY. NG
Check thefollowing.
1. Stop engine.
I-----.

•Harness connectors
2. Disconnect EVAPcanister purgecon-
QD,@

trol solenoid valveharness connector. •10A fuse
3. Turn ignition switch"ON". •
Harness foropen or
4. Check voltage between terminal
@
short
between EVAP
and ground withCONSULTor tester. canister
purgecontrol

Voltage: Batteryvoltage
solenoid
valveandfuse

r
K If
NG, repair harness or
connectors.

SEF816F
SEF488Q
MEC325B
MEC296BB
Clogging TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
[ill

EVAP Canister PurgeControl Solenoid Valve
(Cont'd)
DIAGNOSTIC PROCEDURE
~i5
ECM
B
CONNECTOR
II
'f
~VV1

~ Crack

~i5
~

=:5---

~ Improperconnection

@
EC-181

INSPECTIONSTART

m
CHECK OVERALL FUNCTION.
~INSPECTION
END
1) Jack updrive wheels.
2) Start engine andwarm itup suffi-
ciently.
3) Perform diagnostic testmode II(Self-
diagnostic results).
Make surethatdiagnostic trouble
code No.55isdisplayed.
4) Set theshift lever to1st position.
5) Make surethatEGR valve spring
moves upand down (Useyourfin-
ger) under thefollowing conditions.

At idle:
SprIng doesnotmove.
RacIng engIne fromidleto3,000
rpm:
Spring moves upand down.

NG

l!1
CHECK VACUUM SOURCES TOEGR OK
CHECK COMPONENTS
VALVE ANDEVAP CANISTER.
-----...

(EGRvalve, EGRC-BPT
1) Disconnect vacuumhosestoEGR valveandactivated EVAP
valve andEVAP canister. canister).
2) Make surethatvacuum existsunder Refer
to"COMPONENT
the following conditions. INSPECTION".(Seepage

At idle:
EC-188.)

Vacuum shouldnotexist.

lNG

Racing engine fromidleto3,000
rpm: Vacuum shouldexist.
Replace
malfunctioning
component(s).
NG
[!J
I!l

CHECK CONTROL FUNCTION. OK
CHECK VACUUM HOSE.
1) Check voltage between ECMterminal
----..

1)Check vacuum hose

@
or
GID
andground underthe forclogging, cracksor
following conditions. improper
connection.

Voltage: At Idle
Approximately OV
Engine speedis2,500 rpm
Battery voltage

~NG
SEF179R

~=.
Crack
Clogging MEF51BE
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
[]K]

EGR Valve andEVAP Canister PurgeControl
Solenoid Valve(Cont'd)
DIAGNOSTIC PROCEDURE

~I)
~ID

ECM
-gcoNNEcTORII ~

103 105
~.1

@ :
For Australia

@ :
Except forAustralia

II

Cf~H

~

~ Improperconnection

SEFB16F
EC-186

•

Check
thefollowing.
• Harness connectors

@,@

• 10A fuse
• Harness continuity
between EGRvalve
&

EVAP canister purge
control solenoid valve
and fuse

If
NG, repair harness or
connectors.

NG
OK

CHECK
POWER SUPPLY.
1) Stop engine.
2) Disconnect EGRvalve
&
EVAP canis-
ter purge control solenoid valvehar-
ness connector.
3) Turn ignition switch"ON".
4) Check voltage between terminal
@

and ground.

Voltage: Batteryvoltage
SEF488Q

~i8
dfu
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
[QK]

EGR Valve andEVAP Canister PurgeControl
Solenoid Valve(Cont'd)

@

~i8

~

~i5

ECM
]gCONNECTORII

103 105

II

Ii
Ii

@:
ForAustralia

@:
Except forAustralia CHECK
OUTPUT SIGNALCIRCUIT.
1) Turn ignition switch"OFF".

SEF238R
2)Disconnect ECMharness connector.
3) Check harness continuity between
ECM terminal Gillor
@
andter-
minal
G).
Continuity shouldexist. NG

Repair harness orcon-
nectors.

OK

CHECK COMPONENT
(EGR valve
&
EVAP canister purgecon-
trol solenoid valve).
Refer to"COMPONENT INSPECTION".
NG

Replace EGRvalve
&

EVAP canister purgecon-
trol solenoid valve.

OK

Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
Trouble isnot fixed.
Check ECMpinterminals fordamage
or the connection ofECM harness con-
nector. Reconnect ECMharness con-
nector andretest.
INSPECTION END

EC-187

2:
1

:>
Q)

Ol

~

0
>

::;
c.

::;

0
,,"--

0
-

Rich- Idealratio _
Lean
Mixlure ratio
SEF288D
•

Zirconia
tube SEF406H
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Heated Oxygen Sensor(H02S)(Cont'd)

The heated oxygen sensorisplaced intotheexhaust manifold.
It detects theamount ofoxygen inthe exhaust gascompared
to the outside air.The heated oxygen sensorhasaclosed-end
tube made ofceramic zirconia. Thezirconia generates voltage
from approximately 1Vinricher conditions to
av
inleaner con-
ditions. Theheated oxygen sensorsignalissent tothe ECM.
The ECM adjusts theinjection pulseduration toachieve the
ideal air-fuel ratio.Theideal air-fuel ratiooccurs neartherad-
ical change from1Vto
av.

L
Healerpad
Isolalion
bearing

m
•MIXTURE RATIOTEST.
ACCELERATE TO2000
RPM AND HOLD THEN
TOUCH START

I£J

1800
20002200

~J

NEXT

II
START

SEF815L

m
*
MONITOR
*

NO FAIL

D

CMPS.RPM (REF)2000rpm
MIR FICMNT RICH
DIAGNOSTIC
PROCEDURE
RECORD
\ I/

........ e",/

- CHECK-

",/
........

/ I\
I

SEF522Q
INSPECTION
START
CHECK OXYGEN SENSORCIRCUIT.
1) Start engine andwarm itup suffi-
ciently.

(F.i\
2)Perform "MIXTURE RATIO
~ TEST"in"FUNCTION TEST"
mode withCONSULT.

OR

(F.i\
2)Make surethat"M/R
FIC

~ MNT"in"DATA MONITOR"
mode indicates "RICH"and
"LEAN" periodically more
than 5times during 10 sec-
onds at2,000 rpm.

OR

fti>\
2)Stop engine andsetECM
~ Diagnostic TestMode
/I

(Heated oxygensensormoni-
tor).
3) Restart engineandrunitat
about 2,000rpmforabout 2
minutes underno-load.
4) Keep engine speedat2,000
rpm andmake surethatthe
malfunction indicatorlampon
the instrument panelgoeson
and offmore than5times dur-
ing 10seconds.

NG

@
OK

INSPECTION END

Malfunction indicator
lamp SEF051PA
EC-191

I;)
1

CHECK INPUTSIGNAL CIRCUIT. NG
Repair harness orcon-
1. Stop engine.
--.

nectors.
2. Disconnect ECMharness connector
and heated oxygen sensorharness
connector.
3. Check harness continuity between
ECM terminal
@
or
@
and terminal

@.

Continuity shouldexist.
If OK, check harness forshort.

1
0K
CHECK HEATED OXYGEN SENSOR OK
Goto"CHECK
HEATER CIRCUIT.
--.

COMPONENT".
1. Reconnect harnessconnectors.
2. Start engine.
3. Check voltage between ECMterminal

@
(ForEurope andIsrael) or
@

(For Australia AfTmodels) and
ground withCONSULTor tester
under thefollowing conditions.
Voltage:
Engine speedisbelow 3,200rpm
Approximately OV
Engine speedisabove 3,200rpm
Battery voltage
NG

[!J

CHECK POWER SUPPLY. NG
Check thefollowing.
1. Stop engine.
~

•Harness connectors
2. Disconnect heatedoxygen sensor

aD,@

harness connector. •10A fuse
3. Turn ignition switch"ON".
•Harness foropen or
4. Check voltage between terminal
@
shortbetween heated
and ground. oxygensensorand
Voltage: Batteryvoltage fuse
If NG, repair harness or
OK connectors.
CHECK OUTPUT SIGNALCIRCUIT. NG
Repair harness orcon-
1. Turn ignition switch"OFF".
-----...

nectors.
2. Disconnect ECMharness connector.
3, Check harness continuity between
terminal
G)
and ECM terminal
@

(For Europe andIsrael) orGill (For
Australia
AfT
models) .
Continuity shouldexist.
If OK, check harness forshort.

t
OK

SEF180R
SEF646P
SEF181R

~i5

cilltD

@:
ForAustralia NTmodels

@:
ForEurope andIsrael

TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Heated Oxygen Sensor(H02S) (Cont'd)
@
~
~

I;) ~i5

Il
ECM
'QcoNNECTORII

46 19

For Europe andIsrael, andGA15DE.L.J
engine models
Engineground
@,
@

----- \
~ ~
'1

\
.~

,~\ C/

Power steering",
fluid reservoir __\ ~

W~
:'C"",,

EC-192

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS

Heated Oxygen Sensor(H02S)(Cont'd)

@

Loosen andretighten engineground
screws.

OK

CHECK COMPONENT
(Heated oxygensensorheater).
Refer to"COMPONENT INSPECTION"
below.

OK

Disconnect andreconnect harnesscon-
ne~tors inthe circuit. Thenretest.
Trouble isnot fixed.
Check ECMpinterminals fordamage
or the connection ofECM harness con-
nector. Reconnect ECMharness con-
nector andretest.
Troubleisnot fixed.
Replace heatedoxygen sensor.

COMPONENT INSPECTION NG

Replace heatedoxygen
sensor.

•

DISCONNECT
I~J

00
SEF586Q
Heated
oxygen sensorheater

Check resistance betweenterminals
@
and
CD.

Resistance: 2.3-4.3Q at25°C (77°F)

Check continuity betweenterminals @and
CD,
@
and @.

Continuity shouldnotexist.

If NG, replace theheated oxygen sensor.
CAUTION:

• Discard anyoxygen sensorwhichhasbeen dropped from
a height ofmore than0.5m(19.7 in)onto ahard surface
such asaconcrete floor;useanew one.

EC-193

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Oxygen Sensor(02S)(Cont'd)

The 028 isplaced intotheexhaust manifold. Itdetects the
amount ofoxygen inthe exhaust gascompared tothe outside
air. The sensor hasaclosed-end tubemade ofceramic zirco-
nia. The zirconia generates voltagefromapproximately 1Vin
richer conditions toOV inleaner conditions. Thesensor signal
is sent tothe ECM. TheECM adjusts theinjection pulsedura-
tion toachieve theideal air-fuel ratio.Theideal air-fuel ratio
occurs neartheradical change from1VtoOV.

r

Connector
Isolation bushing
Contact plate
Oxygen
sensor
Louver
Zirconia tube
Holder AEC854

,'--

~

:>
Q)

OJ

.!!1

~ '5
0-

'5

o

o

Rich --- Idealratio
Mixture ratio_
Lean
SEF288D

m
•MIXTURE RATIOTEST.
ACCELERATE TO2CXXJ
RPM AND HOLD THEN
TOUCH START
~
1800 2CXXJ2200

~J

NEXT

II
START

SEF815L

m
1;{MONITOR 1;{NO FAIL
D
CMPS.RPM (REF)
2000rpm
MIR FICMNT RICH
RECORD \ I/

'~/'

- CHECK-

/
"-

I
I\
I

SEF522Q DIAGNOSTIC
PROCEDURE
INSPECTION START
CHECK OXYGEN SENSORCIRCUIT.
1. Start engine andwarm itup suffi-
ciently.

(F.i\
2.Perform "MIXTURE RATIO
~ TEST"in"FUNCTION TEST"
mode withCONSULT.

OR

(F.i\
2.Make surethat"M/R FIC

\..!!J
MNT"in"DATA MONITOR"
mode indicates "RICH"and
"LEAN" periodically more
than 5times during 10sec-
onds at2,000 rpm.

OR

~ 2.Stop engine and'set ECM
~ Diagnostic TestMode II(Oxy-
gen sensor monitor).
3. Restart engineandrunitat
about 2,000rpmforabout 2
minutes underno-load.
4. Keep engine speedat2,000
rpm andmake surethatthe
malfunction indicatorlampon
the instrument panelgoeson
and offmore than5times dur-
ing 10seconds.
NG

@
OK
INSPECTION END
Malfunction indicator
lamp SEF051PA
EC-196

•

Repair
harness orcon-
nectors.

NG
OK

Loosen andretighten engineground
screws. CHECK
INPUTSIGNAL CIRCUIT.
1. Stop engine.
2. Disconnect ECMharness connector
and oxygen sensorharness connec-
tor.
3. Check harness continuity between
ECM terminal
@
or
@
and terminal

CD.

Continuity shouldexist.

If OK, check harness forshort.

~iV
@

TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
Oxygen Sensor(02S)(Conl'd)
@

~Io

ECM
19'
CONNECTOR
II

46 19

II

OK

Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.

@:
ForAustralia M/Tmodels

@:
Except forEurope andIsrael
SEF182R
Trouble
isnot fixed.
Check ECMpinterminals fordamage
or the connection ofECM harness con-
nector. Reconnect ECMharness con-
nector andretest.
Troubleisnot fixed.
Replace oxygensensor.

CAUTION:
• Discard anyoxygen sensorwhichhasbeen dropped from
a height ofmore than0.5m(19.7 in)onto ahard surface
such asaconcrete floor;useanew one.
EC-197