NISSAN ALMERA N15 1995 Service Manual

Repairharness orcon-
nectors.

NG

@

1

CHECK OUTPUT SIGNALCIRCUIT.
1. Turn ignition switch"OFF".
2. Disconnect ECMharness connector.
3. Check harness continuity between
ECM terminal
Gill
andterminal
G).
Continuity shouldexist.

If OK, check harness forshort.

SEF489Q

~io

dfu

TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
[ill

EVAP Canister PurgeControl Solenoid Valve
(Cont'd)

~io

ECM
E
CONNECTOR
II

105

II

OK

CHECK COMPONENT
(EVAP canister purgecontrol solenoid

valve).

Refer to"COMPONENT INSPECTION".

OK
NG
Replace EVAPcanister
purge control solenoid

valve.

Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
Trouble isnot fixed.
Check ECMpinterminals fordamage or
the connection ofECM harness connec-
tor. Reconnect ECMharness connector
and retest.
INSPECTION END

MEC488B COMPONENT
INSPECTION
EVAP canister purgecontrol solenoid valve

Check airpassage continuity.

Airpassage Airpassage
Condition
.

continuity continuity
between
@
and
CID
between

@
and
@

12V direct current sup-
ply between terminals Yes No

G)
and
@

No supply NoYes

If
NG, replace solenoid valve.

EC-182

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
EGR Valve andEVAP Canister PurgeControl
Solenoid Valve
For Europe, IsraelandAustralia, andGA15DE MIT
models
SYSTEM DESCRIPTION

Camshaft positionsensor
Engine coolant temperature sensor
Mass airflow sensor
Throttle position sensor
Ignition switch
Vehicle speedsensor Engine
speed
Engine coolant temperature
Amount ofintake air
Throttle position
Start signal
Vehicle speed ECM
(ECCS
control module) EGR
valve
&

EVAP canister
purge control
solenoid valve

•

This system cutsandcontrols theport vacuum
applied tothe EGR valve andEVAP canister
purge control solenoid valvetosuit engine oper-
ating conditions.
This cut-and-control operationisaccomplished
through theECM. When theECM detects anyof
the following conditions, currentflowsthrough
the solenoid valveinthe EGR valve andEVAP
canister purgecontrol solenoid valvecontrol vac-
uum line. This
causes theport vacuum tobe discharged
into theatmosphere sothat theEGR valve and
EVAP canister purgelineremains closed.
• Engine starting
• Closed throttle position
• Low andhigh engine coolant temperature
• During deceleration
• Engine stopped
• Vehicle speed:below10km/h (6MPH)
• Mass airflow sensor malfunction

SEF783K

l#
Intake
manifold
vacuum signal
SEF240PF COMPONENT
DESCRIPTION
Exhaust gasrecirculation (EGR)valve

The EGR valve controls theamount ofexhaust gasrouted tothe
intake manifold. Vacuumisapplied tothe EGR valve in
response tothrottle valveopening. Thevacuum controls the
movement ofataper valve connected tothe vacuum diaphragm
in the EGR valve.

EGR valve andEVAP canister purgecontrol solenoid
valve

The EGR valve andEVAP canister purgecontrol solenoid valve
responds tosignals fromtheECM. When theECM sends anON
(ground) signal,thecoil inthe solenoid valveisenergized. A
plunger willthen move tocut the vacuum signal(fromthethrot-
tle body tothe EGR valve andEVAP canister purgevalve).
When theECM sends anOFF signal, thevacuum signalpasses
through thesolenoid valve.Thesignal thenreaches theEGR
valve andEVAP canister.

EC-183

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS~
EGR Valve andEVAP Canister PurgeControl
Solenoid Valve(Cont'd)
For Europe andIsrael

EC-EGRC/V-01

ECM (ECCS
CONTROL
MODULE)

em

FUSE
RefertoEL-POWER.
BLOCK
(JIB)

~

~CW

(ill)
B
B1~II(ij

@

3456 W
IN~91

BR

I

SR

dJ~
~Cffi
SR

I

BR
([) EGRVALVE
&
EVAP

CANISTER PURGE
CONTROL SOLENOID
VALVE

I4=!ICW
P

I

p

~
EGR -:
Detectable line
for DTC
-: Non-detectable
line forDTC

Refer tolast page
(Foldout page).

HEC042
EC-184

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS@K]
EGR Valve andEVAP Canister PurgeControl
Solenoid Valve(Cont'd)
GA 16DE forAustralia

EC-EGRC/V-01

IGNITION SWITCH
ON orSTART
ECM(ECCS
CONTROL
MODULE)

em
•

-: Detectable 1ine
for DTC
-: Non-detectable
line forDTC
Refer
toEL-POWER.
FUSE
BLOCK
(JIB)

~
10A

1251

BR

IITJ,@

=r='@
BR

I

BR

I!i
EGRVALVE
&

EVAP CANISTER
PURGE CONTROL
SOLENOID
II 111 VALVE

=r='

P

I

P
~
EGR

till
I
I
fij
em

3456 W
~(ffi

G
Refer
tolast page
(Foldout page).

101 102
103

107 108 109
113 114
115 104
105106
110 111
112

116
117
118

HEC074
EC-185

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