NISSAN ALMERA N15 1995 Service Manual

POSITIVECRANKCASE VENTILATION
Inspection
PCV (Positive Crankcase Ventilation) VALVE

With engine running atidle, remove PCVvalve fromrocker
cover. Aproperly workingvalvemakes ahissing noiseasair
passes through it.Astrong vacuum shouldbefelt immediately
when afinger isplaced overthevalve inlet.

AEC904 PCVHOSE

1. Check hosesandhose connections forleaks.
2. Disconnect allhoses andclean withcompressed air.Ifany
hose cannot befreed ofobstructions, replace.

ET277
EC-32

BASICSERVICE PROCEDURE

• FUEL PRESRELEASE. D
FUEL PUMP WILLSTOP BY
TOUCHING STARTDURING
IDLE.
CRANK AFEW TIMES AFTER
ENGINE STALL

---S-T~-RT--
SEF823K
Fuel
Pressure Release

Before disconnecting fuelline, release fuelpressure fromfuel
line toeliminate danger.

(ij\
1.Turn ignition switch"ON".
~ 2.Perform "FUELPRESSURE RELEASE"in"WORK
SUPPORT" modewithCONSULT.
3. Start engine.
4. After engine stalls,crankittwo orthree times to
release allfuel pressure.
5. Turn ignition switch"OFF".

SEF921P
00
~:

3.
4.
Remove
fuseforfuel pump. •
Start engine.
After engine stalls,crankittwo orthree times to
release allfuel pressure.
Turn ignition switchoffand reconnect fuelpump
fuse.

Vacuum Fuelpressure

..... L
To pressure regulator
Fuel
Pressure Check

• When reconnecting fuelline, always usenew clamps.
• Make surethatclamp screwdoesnotcontact adjacent
parts.
• Use atorque drivertotighten clamps.
• Use Pressure Gaugetocheck fuelpressure.
• Donot perform fuelpressure checkwithsystem operating.
Fuel pressure gaugemayindicate falsereadings.

1. Release fuelpressure tozero.
2. Disconnect fuelhose between fuelfilter andfuel tube
(engine side).
3. Install pressure gaugebetween fuelfilter andfuel tube.
4. Start engine andcheck forfuel leakage.
5. Read theindication offuel pressure gauge.

At idling:
With vacuum hoseconnected
Approximately 245kPa (2.45 bar,2.5kg/cm
2,
36psi)
With vacuum hosedisconnected
Approximately 294kPa (2.94 bar,3.0kg/cm
2,
43psi)

If results areunsatisfactory, performFuelPressure Regula-
tor Check.

Fuel Pressure Regulator Check

1. Stop engine anddisconnect fuelpressure regulator vacuum
hose fromintake manifold.
2. Plug intake manifold witharubber cap.
3. Connect variablevacuumsourcetofuel pressure regulator.
4. Start engine andread indication offuel pressure gaugeas
vacuum ischanged.

Fuel pressure shoulddecrease asvacuum increases. Ifresults
are unsatisfactory, replacefuelpressure regulator.

SEF7188
EC-33

Looseninnumerical order

~~2.27 -3.04 N.m

"l!.ti!?n
(0.231-0.310 kg-m,
~ 20.1.26.9in-Ib)

r;m /
Injector
Upper J~tf /"a-ring ~.
insulator \~.......--: ~
~
Engine
front

o
0 -

Lower ins~~or ~ BASIC
SERVICE PROCEDURE
@[]

Injector Removal andInstallation

1. Release fuelpressure tozero.
2. Remove injectortubeassembly withinjectors fromintake
manifold.
3. Remove injectors frominjector tubeassembly.
• Push injector tailpiece.
• Donot pull onthe connector.
4. Install injectors.
• Clean exterior ofinjector tailpiece.
• Use new O-rings.
• Face metal plateofupper insulator toinjector.

CAUTION:
After properly connecting injectorstofuel tube assembly, check
connections forfuel leakage.

5. Assemble injectorstoinjector tubeassembly.
6. Install injector tubeassembly tointake manifold.

MEC741B
7.Tighten fueltube bolts to7.86 -10.8 N'm (0.801 -1.10 kg-m,
5.8 -8.0 ft-Ib) asshown inthe figure. Thentighten thebolts
to 15.7 -20.6 N'm (1.60 -2.10 kg-m, 11.6-15.2 ft-Ib).

EC-34

BASICSERVICE PROCEDURE
Idle Speedllgnition TiminglldleMixtureRatio
Adjustment
PREPARATION
• Make surethatthefollowing partsarein
good order.
(1) Battery
(2) Ignition system
(3) Engine oiland coolant levels
(4) Fuses
(5) ECM harness connector
(6) Vacuum hoses
(7) Airintake system
(Oil filler cap,oillevel gauge, etc.)
(8) Fuel pressure
(9)' Engine compression
(10) Throttle valve
(11) EGR valve operation -For Europe and
Israel andAustralia, andGA15DE M/Tmod-
els
Overall inspection sequence

INSPECTION
(12)
Evaporative emissionsystem
• On models equipped withairconditioner,
checks shouldbecarried outwhile theair
conditioner is"OFF".
• On models equipped withautomatic
transaxle, whenchecking idlespeed, ignition
timing andmixture ratio,checks shouldbe
carried outwhile shiftlever isin
"N"
position.
• When measuring
"CO"
percentage, insert
probe morethan40cm (15.7 in)into tailpipe .•
• Turn offheadlamps, heaterblower, rear
defogger.
• Keep frontwheels pointed straight ahead.
• Make thecheck afterthecooling fanhas
stopped.

Perform diagnostic testmode
1/

(Self-diagnostic results).
Check
&
adjust ignition timing.
Check
&
adjust idlespeed. NG
Repair orreplace.
Check oxygen sensor*1 function.

OK
Check
oxygen sensor*1 har-
ness.
Check CO%.

NG
NG
Repair orreplace harness.
OK Replace oxygensensor*1.
INSPECTION END Check
emission controlparts NGCheck oxygen sensor*1 function. OK
and repair orreplace ifneces-
sary.
*1: Heated oxygen sensor(ForEurope andIsrael, andAustralia AfTmodels)
Oxygen sensor(Except forEurope andIsrael, andAustralia AfTmodels)

EC-35

ADJUSTING VALUE BASIC
SERVICE PROCEDURE @K]
Idle Speed/Ignition TiminglldleMixtureRatio
Adjustment (Cont'd)
Engine GA14DE,GA16DE
GA16DEGA16DE
models (ForEurope andIsrael) GA15DE
(ForAustralia) (Except
forEurope and
Israel, andAustralia)
MfT
(Without AfT
AfT AfTAfT
Transaxle (With
day-
daytime (in
"N"
MfT(in
"N" MfT(in"N" MfT(in
"N"
time light
lightsys- position)
position) position)position)
system) tem)
Base idle
speed 625::t50 625::t50 725::t50 580::t50
700::t50 625::t50
725::t50600::1:50 750::t50
(rpm)
Idle speed
800::t50 700::t50 800::t50630::t50 750::t50 675::t50 800::t50 650::1:50 800::t
50
(rpm)
Ignition timing 10::t2
10::t2
10::t2 6::t26::t2 8::t28::t210::t2 10::t2
CBTDC)
EC-36

SEF217M
•

START
Visually checkthefollowing:
• Air cleaner clogging
• Hoses andducts forleaks
• Electrical connectors
• Gasket
• Throttle valveandthrottle position sensoroperation

m
Start engine andwarm itup until water temperature
indicator pointstothe middle ofgauge.
Ensure enginestaysbelow 1,000rpm.

iii
Open engine hoodandrunengine atabout 2,000rpm
for about 2minutes underno-load.

[iJ
Perform ECMon-board diagnostic system(Diagnostic
test mode II).
OK lNG
Repair orreplace components asneces-
sary.

I!]
1

Run engine atabout 2,000rpmforabout 2minutes
under no-load.
Race engine twoorthree times under no-load, thenrun
engine forabout 1minute atidle speed.

~

BASIC
SERVICE PROCEDURE
eM]

Idle Speed/Ignition Timing/IdleMixtureRatio
Adjustment (Cont'd)
SEF247F
SEF455Q
MALFUNCTION INDICATORLAMP
SEF248F
EC-37

l

Ii
1)
Turn offengine anddisconnect throttle
position sensorharness connector.
2) Start engine.
Race engine (2,000-3,000 rpm)2or 3times
under no-load andthen runengine atidle
speed.

Ii
Check ignition timingwithatiming light.

Ignition timing:RefertoEC-36.
OK
lNG

Adjust ignition timingtothe specified valueby
turning distributor afterloosening boltswhich
secure distributor.

Ignition timing:RefertoEC-36.

(])

@

l

[!1
1)Turn offengine anddisconnect throttle
position sensorharness connector.
2) Start engine.

~

@
BASIC
SERVICE PROCEDURE
@]

Idle Speed/Ignition Timing/ldleMixtureRatio
Adjustment (Cont'd)
@
SEF695L EC-38

BASICSERVICE PROCEDURE @KJ
Idle Speed/Ignition Timing/IdleMixtureRatio
Adjustment (Cont'd)

1

Check baseidlespeed. RefertoEC-36.

I

OK
NG

Race engine (2,000-3,000 rpm)2or 3times under no-
load andrunengine atidle speed.

III

.
Adjust
idlespeed byturning idlespeed adjusting screw.

Base idlespeed: RefertoEC-36.

1) Turn offengine andconnect throttleposition sensorharness connec-
tor.
2) Start engine.

1

Start engine.
Race engine (2,000-3,000 rpm)2or 3times under no-
load andrunengine atidle speed.

t

EC-39
•

o
1:<
MONITOR
1<
NO FAIL
0
BASIC
SERVICE PROCEDURE
@KJ

Idle Speedllgnition Timing/IdleMixtureRatio
Adjustment (Cont'd)

@

CMPS.RPM (REF)
MIR
F/C
MNT 2000rpm
RICH
Checkidlespeed. Refer10EC-36.
OK NG

Check IACV-AAC valveandreplace ifnecessary.

__ R_E_C_O_R_D __
I

SEF515Q

CheckIACV-AAC valveharness andrepair ifneces-
sary.
Check ECMfunction- bysubstituting anotherknown
good ECM.
-ECM maybethe
cause ofaproblem,
but this israrely the
case.

SEF987K

(g~~~:: _
mJ
~~r

l~~~~V
-~

Data linkconnector forCONSULT
(Connect CHKandIGN terminals
with asuitable harness.)

SEF909P

MALFUNCTION INDICATORLAMP

SEF217M
o

(ij\E
1.See "MIA
F/C
MNT" in"Data monitor"
~ mode.
2. Run engine atabout 2,000rpmforabout 2
minutes underno-load.
3. Maintaining engineat2,000 rpmunder
no-load (engine iswarmed upsufficiently.),
check thatthemonitor fluctuates between
"LEAN" and"RICH" morethan5times dur-
ing 10seconds.

1 lime: RICH->LEAN ->RICH
2 limes: RICH->LEAN
->
RICH ->LEAN
->

RICH OR

Set "Oxygen sensormonitor" indiagnostic
test mode II.
(See page EC-47.)
2. Run engine atabout 2,000rpmforabout 2
minutes underno-load.
3. Maintaining engineat2,000 rpmunder
no-load, checkthatthemalfunction indicator
lamp onthe instrument panelgoesONand
OFF more than5times during 10seconds.

OK

END

EC-40 NG

•

oxygen
sen-
Europe and
nd Australia

els)

sensor
for Europe
el, and Aus-
T models)

@

II

Check oxygen sensor*1 harness: *1:
Heated
1) Turn offengine anddisconnect battery sor
(For
ground cable. Israel,
a
2) Disconnect ECMharness connector from
AIT

mod
ECM. Oxygen
3) Disconnect oxygensensor*1 harnessconnec- (Except
tor. Then connect harness sideterminal for and
Isra
oxygen sensor*1 toground withajumper tralia

AI

wire.
4) .Check forcontinuity betweenterminalNo.46
or No. 19ofECM harness connector and
body ground.
Continuity exists................................................ OK
Continuity doesnotexist .................................. NG
OK lNG

I
Repair orreplace harness.
Connect ECMharness connector tocontrol unit.

~
III

00
1)
Connect batteryground cable.
2) Select "ENGCOOLANT TEMP"in
"ACTIVE TEST"mode.
3) Set "COOLANT TEMP"to20°C (68°F)
by touching "au"and"ad" and
"UP", "DWN".
OR

@
1)
Disconnect enginecoolant tempera-
ture sensor harness connector.
2) Connect aresistor (2.5kQ)between
terminals ofengine coolant tempera-
ture sensor harness connector.

[+]
Start engine andwarm itup until water temper-
ature indicator pointstomiddle ofgauge.

~

BASIC
SERVICE PROCEDURE ~
Idle Speed/Ignition Timing/IdleMixtureRatio
Adjustment (Cont'd)

CD

SEF194R
SEF056PA
~

DISCONNECT

18
~
AEC681

===MONITOR===
CMPS.RPM (REF)
Orpm

INJ PULSE
O.7msec

IGN TIMING 5BTDC

SEC242BA

•
ACTIVE TEST.
0

COOLANT TEMP 20°C

Engine coolant

DISCONNECT
temperature

10
!;j:~:~~'~";"'"

~

00
2.5k
n
resistor

II

ECM
19'
CONNECTOR
II

19

II

For Australia

II
ECM ~CONNECTORII

46

II
Except forAustralia

SEF455Q EC-41