1995 NISSAN ALMERA N15 Service Manual

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

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
@KJ

EGR Valve andEVAP Canister PurgeControl
Solenoid Valve(Cont'd)
COMPONENT INSPECTION
EGR valve

Apply vacuum toEGR vacuum portwith ahand vacuum pump.

EGR valve spring should lift.

If NG, replace EGR
valve.
MEF137D EGRC-BPT valve

1) Plug oneoftwo ports ofEGRC-BPT valve.
2) Vacuum fromtheother portandcheck forleakage while
applying apressure above0.981kPa(100 mmH
2
0,
3.94
inH
2
0)
fromunder EGRC-BPT valve.
3)
If
a leakage isnoted, replace thevalve.

+
Apply pressure
SEF083P
MEC4888 EGR
valve andEVAP canister purgecontrol solenoid
valve

Check airpassage continuity.
Airpassage Air
passage
Condition continuity continuity
between
@
and
@
between

@
and
@

12V direct current sup-
ply between terminals Yes
No

G)
and
@

No supply NoYes
If NG, replace solenoid valve.

EC-188

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Heated Oxygen Sensor(H02S)
For Europe andIsrael

EC-H02S-01

IGNITION SWITCH
ON orSTART

10A

mJ

IN~OI

BR/Y

. I

BR/Y

I[~]I~

'=r='@

BR/Y

I

BR/Y

rn
FUSE
BLOCK
(J/B)

~
Refer
toEL-POWER.
-: Detectable line
for DTC
-: Non-detectable
line forOTC
•

HEATED
OXYGEN
SENSOR

I4=Jl I4=Jl


- OR W

OR

~
02H
F
-;

tl
I

I
I
I

I
JOINT

I
CONNECTOR-6

: @

W.~-~

mn
In

02S ECM B8 8
(Eg~iROL
...1..__
I
..J
1

MODULE)

(IT)
(ffi)(ffi)

Bjl
Illjj
@

3456 W
~

~GY ~cw

[I[I]1]I[ill]
GY
Refer
tolast page
(Foldout page).

HEC048
EC-189

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Heated Oxygen Sensor(H02S)(Cont'd)
GA16DE forAustralia (A/Tmodels)

EC-H02S-01

IGNITION SWITCH
ON or START
10A FUSE
BLOCK

rnJ
(J/B)

~

IN~OI

BR/Y
I

BR/Y

I$I~
@

BR/Y

I

BR/Y

rn
HEATEO
OXYGEN
SENSOR

~
Ibi=ll
<0

-
OR W Refer
toEL-POWER.

-: Detectable line

for DTC

-: Non-detectable

line forDTC

~II
I'ti}
@

3456 W
OR

uil5il
02H
~

;

tl
I
I

I
I

I JOINT

I
CONNECTOR-6

: CW

W.~~~

rr16il
In

02S ECM BB B
(~g~¥ROL
,_I.J
1_

MODULE)
-L

(IT)
~

~cw

IIITIIII[ll!]
GY
Refer
tolast page

(Foldout page).

101 102103
107 108109
113 114115 104
105
106
110 111112
116
117
118

EC-190
HEeDBD

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