NISSAN ALMERA N15 1995 Service Manual

BASICSERVICE PROCEDURE
SEF310R

Vacuum
Fuelpressure

.... L
To
pressure regulator

SEF718B

'nsu'a,or~7

a-ring~1 ~
~> ~

InsUlalor~7
OJ'

Om~riJ$ _.
~lnjeCIOr

kJ

Insulator
11+-
1

~'I"
Localeplate
•. onthis side.
a-ring .
I

FuellUbe~i '.
assembly ,.
~'nsulator
I
SEF616N
MEC710B Fuel
Pressure Regulator Check

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

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

1. Release fuelpressure tozero.
2. Disconnect vacuumhosefrompressure regulator.
3. Disconnect fuelhoses fromfueltube assembly.
4. Disconnect injectorharness connectors.
5. Remove injectors withfueltube assembly.
• Push injector tailpiece.
• Donot pull onthe connector.
6. Install injectors.
• Clean exterior ofinjector tailpiece.
• Use new O-rings.
7. Install injectors withfueltube assembly tointake manifold.
8. Install fuelhoses tofuel tube assembly.
9. Reinstall anyparts removed inreverse orderofremoval.

CAUTION:
After properly connecting fuelhose toinjector andfuel tube
assembly, checkconnection forfuel leakage.
EC-242

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

Overall inspection sequence

INSPECTION
•
•
•
•
•
•
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 II
(Self-diagnostic results).

OK

Check
&
adjust ignition timing.
Check
&
adjust idlespeed.
Check heated oxygen sensor
function. NG
Repair orreplace.
NG Check heated oxygen sensor
harness. NG
Repair orreplace harness.
OK OK
Check CO%. OKReplace heatedoxygen sensor.

NG

INSPECTION END Check
emission controlparts
and repair orreplace ifneces-
sary.

EC-243
NG
Check heated oxygen sensor
function.
OK

@

START
Visually checkthefollowing:
• Air cleaner clogging
• Hoses andduct forleaks
• Electrical connectors
• Gasket (intakemanifold, cylinderhead,exhaust system)
• Throttle valveandthrottle position sensoroperation

m
Start engine andwarm itup until engine coolant temperature indicator
points tothe middle ofgauge.
Ensure enginespeedstaysbelow 1,000rpm.

1

Open engine hoodandrunengine atabout 2,000rpmforabout 2minutes
under no-load.

Ii]
Perform theDiagnostic TestMode
1\
(Self-diagnostic results).
OK ~NG
Repair orreplace components asneces-
sary.

[!J
Run engine atabout 2,000rpmforabout 2minutes underno-load.
Rev engine twoorthree times under no-load, thenrunengine atidle
speed forabout 1minute .

li]1!I
00
1.
Select "IGNITION TIMINGADJ"inWORK SUPPORT mode.
2. Touch "START" .

.

OR

00
1.
Turn offengine anddisconnect throttleposition sensorharness
connector.
2. Start engine.
Rev engine (2,000-3,000 rpm)2or 3times under no-load, thenrunengine
at idle speed.

t

Throttle position sensor
harness connector SEF785KASEF051PA
BASIC
SERVICE PROCEDURE Em
Idle Speedllgnition TiminglldleMixtureRatio
Adjustment (Cont'd)
SEF248F
SEF455Q
Malfunction indicator
lamp \
I/

'~,,/

- CHECK-

,,/
........

/ I\
Ii] •IGN TIMING ADJ.
D
IGNITION TIMINGFEEDBACK
CONTROL WILLBEHELD BY
TOUCHING START.
AFTER DOING SO,ADJUST
IGNITION TIMINGWITHA
TIMING LIGHTBYTURNING
THE CAMSHAFT POSITION
SENSOR.

I
START

I

SEF546N
EC-244

AEC804
•

Ii

L

Check ignition timingwithatiming light.

M/T:
15°::l:2°BTDC
A/T: 15°::l: 2°BTDC (inUN" position)
NG
Adjust ignition timingtothe specified valuebyturning
distributor afterloosening boltswhich secure distribu-
tor.

M/T:
15°::l:2°BTDC

.
A/T:
15°::l: 2°BTDC (inUN" position)

~IIJ
@
~

00
1.
Select
"IGNTIMING ADJ"in"WORK
SUPPORT" mode.
2. Touch "START".
OR

@
1.
Stop engine anddisconnect throttleposition
sensor harness connector.
2. Start engine.

0
Check idlespeed.
@ Read
idlespeed in"IGN TIMING ADJ"in
"WORK SUPPORT" mode.
OR

@
Checkidlespeed.

M/T:
750::l: 50rprn
A/T: 750::l: 50rprn (inUN" position)
OK NG
Rev engine (2,000-3,000 rpm)2or 3times under
no-load, thenrunengine atidle speed.

1.1
Adjust idlespeed byturning idlespeed adjusting
screw.

M/T:
750::l: 50rpm
A/T: 750::l: 50rprn (inUN" position)

II
00
Touch
"BACK".
OR

@
1.
Turn offengine andconnect throttleposition
sensor harness connector.
2. Start engine.

L

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

-.

BASIC
SERVICE PROCEDURE
[]K]

Idle Speed/Ignition Timing/IdleMixtureRatio
Adjustment (Cont'd)

@

SEF548N

/ / I

Throttle position sensor-
harness connector /
I

\ \ SEF788LASEF546N

START

•
IGN TIMING ADJ.
0

IGNITION TIMINGFEEDBACK
CONTROL WILLBEHELD BY
TOUCHING START
AFTER DOING SO,ADJUST
IGNITION TIMINGWITHA
TIMING LIGHTBYTURNING
THE CAMSHAFT POSITION
SENSOR

= ==
MONITOR
==
=

CMPS.RPM (REF)762rpm
IGN TIMING 15BTDC
CLOSED TH/POS ON

Ii

o •
IGN TIMING ADJ.
0

I- -
CONDITION SETIING--
IGN/T FEEDBACK HOLD
EC-245

BASICSERVICE PROCEDURE
mJ

Idle Speed/Ignition Timing/IdleMixtureRatio
Adjustment (Cont'd)
@
SEF909P SEF913J

RECORD

@

M
may bethe
se ofa
blem, butthis
arely thecase

II

1

Check idlespeed.

00
Read
idlespeed in"DATA
MONITOR" modewithCONSULT.
OR

@
Check
idlespeed.

M/T:
800:l: 50rpm

A/T:
800:l: 50rpm (in
uN"
position)

OK ~NG
Check IACV-AAC valveandreplace ifnec-
essary.

~

Check IACV-AAC valveharness andrepair
if necessary.

~

Check ECMfunction- bysubstituting
another knowngoodECM.
-EC
cau
pro

1II111[!]
is
r

(j)
1.
See "M/R
FIC
MNT" in"DATA
MONITOR" mode.
2. Run engine atabout 2,000rpm
for about 2minutes under
no-load.

3.
Maintain engineat2,000 rpm
under no-load (engineiswarmed
up sufficiently). Checkthatthe
monitor fluctuates between
"LEAN" and"RICH" morethan5
times during 10seconds.

1 cycle: RICH->LEAN ->RICH
2 cycles: RICH->LEAN ->RICH
->LEAN ->RICH

NG
OR
~
(j)
1.
Set "Heated oxygensensor
monitor" inthe Diagnostic Test
Mode II.
(See page EC-252.)
2. Run
engine atabout 2,000rpm
for about 2minutes under
no-load.

3.
Maintain
engineat2,000 rpm
under no-load. Checkthatthe
malfunction indicatorlampgoes
on and offmore than5times dur-
ing 10seconds.
~OK
END

SEF135K

I

MEC7118
825rpm

2000rpm

RICH

1<

NO FAIL
D

RECORD
\ I/

.........
~/&#34;

- CHECK-

/
......

/ I\

~MONITOR
~NOFAIL
0

CAS-RPM (REF)
CMPS.RPM (REF)
MIR
FIC
MNT

1<

MONITOR

@~~
~~r

~~V
-
-~

Data linkconnector forCONSULT
(Connect CHKandIGN terminals
with asuitable harness)

II

SEF051PEC-246

Heatedoxygen sensor
harness connector BASIC
SERVICE PROCEDURE [][]
Idle Speed/Ignition Timing/IdleMixtureRatio
Adjustment (Cont&#39;d)

@

II
MEF031DB

~io

ECM TIcoNNECTORl1

19

LEn
MEC712B
Check
heated oxygen sensorharness:
1. Turn offengine anddisconnect batteryground
cable.
2. Disconnect ECMharness connector fromECM.
3. Disconnect heatedoxygen sensorharness con-
nector. Thenconnect harness sideterminal for
heated oxygen sensortoground withajumper
wire.
4. Check forcontinuity betweenterminal
@
ofECM
harness connector andbody ground.
Continuity exists OK
Continuity doesnotexist NG

OK

Repairorreplace harness.
Connect ECMharness connector toECM .
•

OR

1.
Connect batteryground cable.
2. Select &#34;ENGCOOLANT TEMP&#34;in
&#34;ACTIVE TEST&#34;mode.
3. Set &#34;COOLANT TEMP&#34;to20&#34;C (68&#34;F) by
touching &#34;Qu&#34;and&#34;Qd&#34; and&#34;UP&#34;,

&#34;DWN&#34;.

Disconnect enginecoolant temperature
sensor harness connector.
2. Connect aresistor (2.5kQ)between termi-
nals ofengine coolant temperature sensor
harness connector.
3. Connect batteryground cable.

Ii

AEC681

•
ACTIVE TEST.
0

COOLANT TEMP 20°C
===MONITOR=== CMPS.RPM (REF)
Orpm

INJ PULSE
O.7msec

IGN TIMING 5BTDC

DISCONNFCT
Enginecoolant
10 temperature
sensor
harness connector
~ ~

00
2.5
k0 resistor
Start
engine andwarm itup until engine coolant
temperature indicatorpointstomiddle ofgauge.
(Be sure tostart engine aftersetting &#34;COOLANT

&#39;-- A_E_C6_8-l2
TEMP&#34;orinstalling a2.5 kQresistor.)

Ii

SEF455QEC-247

m
1

Rev engine twoorthree times under no-load, thenrun
engine atidle speed.

m
Check &#34;CO&#34;%.

Idle CO: Less than10%andengine runssmoothly.

After checking CO%.

00
1.
Touch &#34;BACK&#34;.
OR

(j)
1.
Disconnect theresistor fromterminals ofengine
coolant temperature sensorharness connector.
2. Connect
enginecoolant temperature sensorhar-
ness connector toengine coolant temperature
sensor.
NG
1
0K
Replace heatedoxygen sensor.

fa
an

00
1.
See
&#34;MIR
FIC
MNT&#34; in&#34;Data
monitor&#34; mode.
2. Maintain
engineat2,000 rpmunder
no-load (engine iswarmed upsuffi-
ciently.). Checkthatthemonitor fluc-
tuates between &#34;LEAN&#34;and&#34;RICH&#34;
more than5times during 10sec-
onds.
1 cycle: RICH-->LEAN -.RICH
2 cycles: RICH-->LEAN -->RICH
-->LEAN -->RICH

OR

(j)
1.
Set
&#34;Heated oxygensensormonitor&#34;
in the Diagnostic TestMode II.
(Refef&#39;to EC-253)
2. Maintain
engineat2,000 rpmunder
no-load. Checkthatthemalfunction
indicator lampgoesONand OFF
more than5times during 10sec-
onds.

I
NG OK

SEF913J

I

MEC7118

2000rpm

RICH
*

NO FAIL
D
RECORD
SEF909PBASIC
SERVICE PROCEDURE
mJ

Idle Speed/Ignition Timing/ldleMixtureRatio
Adjustment (Cont&#39;d)

CID

SEF248F
\ I/

.........
~/&#39;

- CHECK-

/
.......

/ I\
CMPS.RPM
(REF)

MIR F/CMNT

*

MONITOR

~~~~:?_-~ .
w=jr

~~~~&#34;v
-~

Data linkconnector forCONSULT
(Connect CHKandIGN terminals
with asuitable harness)

SEF051PEC-248

,$
BASIC
SERVICE PROCEDURE
[]K]

Idle Speedllgnition TiminglldleMixtureRatio
Adjustment (Cont&#39;d)

CD

•

ause ofaproblem, but

It
IS IS
rarely thecase.

1

Connect heatedoxygen sensorharness connec-
tor toheated oxygen sensor.
Check fuelpressure regulator.
(Refer toEC-242.)
Check massairflow sensor anditscircuit.
Refer toTROUBLE DIAGNOSIS FORDTC12.
(Refer toEC-293.)
Check injector anditscircuit.
Refer toTROUBLE DIAGNOSIS FORNON
DETECTABLE ITEMS.
(Refer toEC-324.)
Clean orreplace ifnecessary.
Check engine coolant temperature sensorand
its circuit. RefertoTROUBLE DIAGNOSIS FOR
DTC 13.
(Refer toEC-297.)
Check ECMfunction&#39; bysubstituting another
known goodECM
•.ECM maybethe c

1

EC-249

ON-BOARDDIAGNOSTIC SYSTEMDESCRIPTION
\ I/

&#39;~/&#39;

- CHECK-

/
.......

/ I\

SEF051P
Malfunction
Indicatorlamp(Mil)

1. The malfunction indicatorlampwilllight upwhen theigni-
tion switch isturned ONwithout theengine running. Thisis
a bulb check.
• Ifthe malfunction indicatorlampdoes notlight up,refer to
EL section (&#34;WARNING LAMPSANDCHIME&#34;) orsee

EC-370.

2. When theengine isstarted, themalfunction indicatorlamp
should gooff.

Condition Diagnostic
Diagnostic
Test Mode I TestMode II
Engine
stopped BULBCHECK SELF-DIAGNOSTIC
Ignition

0
RESULTS
switch in
&#34;ON&#34; posi-
tion Engine
HEATEDOXYGEN
~ running
MALFUNCTION
SENSORMONI-

ID
WARNING
TOR
EC-250

ON-BOARDDIAGNOSTIC SYSTEMDESCRIPTION
Malfunction IndicatorLamp(MIL)(Cont&#39;d)
HOW TOSWITCH DIAGNOSTIC TESTMODES
~ Turnignition switch&#34;ON&#34;.(Donot
~ startengine.)
~
•SWitching thediagnostic testmode isnot possible when
the engine isrunning.
• When ignition switchisturned offduring diagnosis, power
to ECM willdrop afterapprox. 1second.
The diagnosis willautomatically returntoDiagnostic Test
Mode
I.

Diagnostic
TestMode I- BULB CHECK

1

~yW~r
~-~

Data linkconnector forCONSULT
(Connect CHKandIGNterminals
with asuitable harness.)
Wait atleast 2seconds.
CHKIGN

~J/~l
~-~

Data linkconnector forCONSULT
(Disconnect CHKandIGNterminals
with asuitable harness.)
DIAGNOSTIC TESTMODE II
- SELF-DIAGNOSTIC RESULTS

~

f!i~:~~-~
w;ir

l~mv
-~

Data linkconnector forCONSULT
(Connect CHKandIGN terminals
with asuitable harness.)
Wait atleast 2seconds.

~

~/~~N
~-~

Data linkconnector forCONSULT
(Disconnect CHKandIGNterminals
with asuitable harness.)
I

Startengine.
Start engine. Diagnostic
TestMode I-
MALFUNCTION WARNING
Diagnostic TestMode II
- HEATED OXYGEN
SENSOR MONITOR
•

EC-251