1995 NISSAN ALMERA N15 Service Manual

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Oxygen Sensor(02S)
Except forEurope andIsrael

02S

~
w
ECM
(ECCS
CONTROL
MODULE)

em
EC-02S-01

_. Detectable line

for
DTC

-: Non-detectable

line for
DTC

rn
JOINT

CONNECTOR-6

@

1

(-

~,------
....
1
1

I

I

I

1
1

I
I
I

1
1

I

1

I
I
1

I
I
I
I
I

I

I

I
I
1

I

I

- _I

-
-)

~@

rn:II.ITIIillJ
GY
w

rn
OXYGEN
SENSOR

@
n

8 8 8

i.J
1

m m

EC-194 HEC049

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Oxygen Sensor(02S)(Coni'd)
GA16DE forAustralia
(M/T
models)
EC-02S-01

ECM
-:

Detectable
line
(ECCS for
OTC
CONTROL
-:

Non-detectable
MODULE) line
forOTC
02S

•

1~61

w

-
~

~-

1 1

I I

I
I

1 1
1
I

1 1

I
I

1
I

1
I

I

I
I

I
I

1
1
rn
1

I
JOINT

I
CONNECTOR-6

1
@

I

1
1

1
1

I

I

1
I

1
I

I
I
1-
_I

r
)

~

-

w
n

m
BB B

OXYGEN
~...J

1

SENSOR

~
-!-

(F13)
(F14)

-

~cw
ITIIIITill.IIJ
GY

101 102 103
107 10B 109
113 114 115 104
105
106
110 111112
116
117
llB

HEC081
EC-195

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

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Valve Timing Control (VTC)
SYSTEM DESCRIPTION

Mass airflow sensor Amount
ofintake air
Camshaft positionsensor Enginespeed
Engine coolant temperature sensorEnginecoolant temperature ECM

(ECCS

control module) Valve
timing
control solenoid
valve
Throttle positionsensor Throttle
position

The valve timing control system isutilized toincrease engineperformance. Intakevalveopening and
closing timeiscontrolled, accordingtothe engine operating conditions, bythe ECM.
Engine coolant temperature signals,enginespeed,amount ofintake air,throttle position, vehiclespeed
and gear position areused todetermine intakevalvetiming.
The intake camshaft pulleyposition isregulated byoil pressure, whichiscontrolled bythe valve timing
control solenoid valve.

Drain .. Intake
airsignal (From massairflow sensor)
Engine speedsignal(From camshaft positionsensor)
Engine coolant temperature (Fromengine coolant temperature sensor)
Throttle valveidleposition (Fromthrottle position sensor)
Vehicle speed(Fromvehicle speedsensor)
"'- Camshaft (Intakeside)

EGM
(EGGS

control
module)

/

Camshaft sprocket
Piston
Valve
timing control ~
»

'o'""oid ,,',"
Ii

/

Return spring

MEF572DA
EC-198

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Valve Timing Control (VTC)(Cont'd)
OPERATION
Engine operating condition Valve
timing control Intakevalveopening
Valveoverlap Enginetorquecurve
solenoid valve
andclosing time
• Engine coolant temperature
is 70"C (158"F) ormore .
• Engine loadishigh .
• Engine speedisbetween
ONAdvance
Increased @
1,500 rpmand5,100 rpm.
• Engine speedis6,800 rpmor
more.
Those otherthanabove OFFNormal Normal

CD

CD
Valve timing control (VTC)solenoid valveisOFF. @Valve timing control (VTC)solenoid valveisON.

•

Effr
t
f__ ~

Torque ~

L__ _

Engine speed
--+-

Except forAustralia
Exhaust valve
open time
Intake closes
For Australia
Exhaust valve
open time
intake cioses Intake
valve
open lime
BOC
CD

I~Overlap (-12°)
TOC ,Intake opens
Intake valve
open time Overlap
(18°)
@
BOC
CD

EC-199 @
SEF183R

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Valve Timing Control (VTC)(Cont'd)
GA 16DE engine models exceptforEurope andIsrael

EC-VTC-01

IGNITION SWITCH
ON orSTART

10A

1251
FUSE
BLOCK
(JIB)

Refer
toEL-POWER.

fill
I
,~@

45678 W
~
Y.1.J.gjJ
B
IN~91

BR

I

8R

rn@)

U4Jl@
BR

I

BR

~VTC SOLENOIDVALVE

14=JJ~
Y/R

I

Y/R

~
VTC
-:
Oetectable line
for DTC
-: Non-detectable
line forDTC
ECM (ECCS CONTROL
MODULE)

ill)

Refertolast page
(Foldout page).

HEC050
EC-200

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Valve Timing Control (VTC)(Cont'd)
GA 16DE forAustralia

EC-VTC-01

IGNITION SWITCH

ON
or
START

RefertoEL-POWER.

FUSE

BLOCK
(JIB)

~

fIll
I
I~
em

3456 W
~ffi)

ll..!.@jJ
B
10A

1251

IN~gl
BR

I

BR

dJ@

lkfdI
cru
SR

I

SR

~VTC
SOLENOID

VALVE

l4=JI(ffi)
Y!R

I

Y/R

nffin
VTC
ECM

(ECCS

CONTROL

MODULE)

(ill
-:
Detectable line
for DTC
-: Non-detectable
line forDTe

Refer tolast page
(Foldout page).
•

101 102 103
107 108
to9

113 114
115 104
105106
110 111112
116
117
118

EC-201 HEC082