engine NISSAN ALMERA N15 1995 Service Manual

@

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/

.........
~/"

- 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'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 "ENGCOOLANT TEMP"in
"ACTIVE TEST"mode.
3. Set "COOLANT TEMP"to20"C (68"F) by
touching "Qu"and"Qd" and"UP",

"DWN".

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 "COOLANT

'-- A_E_C6_8-l2
TEMP"orinstalling a2.5 kQresistor.)

Ii

SEF455QEC-247

m
1

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

m
Check "CO"%.

Idle CO: Less than10%andengine runssmoothly.

After checking CO%.

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

OR

(j)
1.
Set
"Heated oxygensensormonitor"
in the Diagnostic TestMode II.
(Refef'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'd)

CID

SEF248F
\ I/

.........
~/'

- CHECK-

/
.......

/ I\
CMPS.RPM
(REF)

MIR F/CMNT

*

MONITOR

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

~~~~"v
-~

Data linkconnector forCONSULT
(Connect CHKandIGN terminals
with asuitable harness)

SEF051PEC-248

,$
BASIC
SERVICE PROCEDURE
[]K]

Idle Speedllgnition TiminglldleMixtureRatio
Adjustment (Cont'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' bysubstituting another
known goodECM
•.ECM maybethe c

1

EC-249

ON-BOARDDIAGNOSTIC SYSTEMDESCRIPTION
\ I/

'~/'

- 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 ("WARNING LAMPSANDCHIME") 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
"ON" posi-
tion Engine
HEATEDOXYGEN
~ running
MALFUNCTION
SENSORMONI-

ID
WARNING
TOR
EC-250

ON-BOARDDIAGNOSTIC SYSTEMDESCRIPTION
Malfunction IndicatorLamp(MIL)(Cont'd)
HOW TOSWITCH DIAGNOSTIC TESTMODES
~ Turnignition switch"ON".(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

ON-BOARDDIAGNOSTIC SYSTEMDESCRIPTION ~

Malfunction IndicatorLamp(MIL)(Cont'd)

DIAGNOSTIC TESTMODE I-BULB CHECK

In this mode, theMALFUNCTION INDICATORLAMPonthe instrument panelshould stayON.If
it
remains
OFF, check thebulb. Refer toEL section ("WARNING LAMPSANDCHIME") orsee EC-370.

DIAGNOSTIC TESTMODE I-MALFUNCTION WARNING
MALFUNCTION INDICATORLAMP
ON
OFF Condition
Engine coolant temperature sensorcircuitmalfunction isdetected, orthe ECM's CPU
is malfunctioning.
No malfunction.

• These Diagnostic TroubleCodeNumbers areclarified inDiagnostic TestMode II(SELF-DIAGNOS-
TIC RESULTS).

DIAGNOSTIC TESTMODE II-SELF-DIAGNOSTIC RESULTS

In this mode, adiagnostic troublecodeisindicated bythe number ofblinks ofthe MALFUNCTION INDI-
CATOR LAMPasshown below.

Example: Diagnostic troublecodeNo.12and No.43

0.6 0.3

ON
1111

OFF ~
0.9 0.3
0.6

--I~
2.1 0.6
0.9
0.3

Unit:second
Diagnostic troublecodeNo.12 Diagnostic
troublecodeNo.43

AEC490
• SELF-DIAG RESULTS.
0

FAILURE DETECTED TIME
NATS MALFUNCTION

0

I
ERASE

II
PRINT

I

SEF288Q

Long
(0.6second) blinkingindicates thenumber often digits, andshort (0.3second) blinkingindicates
the number ofsingle digits.Forexample, themalfunction indicatorlampblinks 4times forabout 2.5
seconds (0.6secx4times) andthen itblinks threetimes forabout 1second (0.3sec x3 times). This
indicates theDTC "43" andrefers tothe malfunction ofthe throttle position sensor.
In this way, allthe detected malfunctions areclassified bytheir diagnostic troublecodenumbers. The
DTC "55" refers tono malfunction. (SeeDIAGNOSTIC TROUBLECODECHART, refertoEC-268.)

HOW TOERASE DIAGNOSTIC TESTMODE II(Self-diagnostic results)

The diagnostic troublecodecanbeerased fromthebackup memory inthe ECM when thediagnostic
test mode ischanged fromDiagnostic TestMode IIto Diagnostic TestMode
I.
(Refer to"HOW TO
SWITCH DIAGNOSTIC TESTMODES" onprevious page.)
• Ifthe battery terminal isdisconnected, thediagnostic troublecodewillbelost from thebackup
memory within24hours.
• Becareful nottoerase thestored memory beforestarting- troublediagnoses.
• Ifthe MIL blinks or"NATS MALFUNCTION" isdisplayed on
"SELF-OIAG RESULTS"screen,perform self-diagnostic
results modewithCONSULT usingNATS program card
(NA TS-E940). RefertoEL section.
• Confirm noself-diagnostic resultsofNATS isdisplayed
before touching "ERASE" in"SELF-DiAG RESULTS"mode
with CONSULT.
• When replacing ECM,inltialisation ofNATS V2.0system and
registration ofall NATS V2.0 Ignition keyIDsmust becar-
ried outwith CONSULT usingNATS program card(NATS-
E940).
Therefore, besure toreceive allkeys from vehicle owner.
Regarding theprocedures ofNATS initialisation andNATS
ignition key
10
registration, refertoCONSULT operation
manual, NATS V2.0.

EC-252

ON-BOARDDIAGNOSTIC SYSTEMDESCRIPTION
[]K]

Malfunction Indicatorlamp(Mil)(Cont'd)

DIAGNOSTIC TESTMODE II-HEATED OXYGENSENSORMONITOR

In this mode, theMALFUNCTION INDICATORLAMPdisplays thecondition ofthe fuel mixture (leanor
rich) which ismonitored bythe heated oxygen sensor.
MALFUNCTION INDICATORLAMPFuelmixture condition inthe exhaust gasAirfuel ratio feedback controlcondition
ON Lean
Closedloopsystem
OFF Rich
Remains ONorOFF Anycondition
Openloopsystem
To check theheated oxygen sensorfunction, startengine inDiagnostic TestMode II.Then warm itup
until engine coolant temperature indicatorpointstomiddle ofgauge.
Next runengine atabout 2,000rpmforabout 2minutes underno-load conditions. Makesurethatthe•
MALFUNCTION INDICATORLAMPcomes ONmore than5times within 10seconds withengine running
at 2,000 rpmunder no-load.

EC-253