engine NISSAN ALMERA N15 1995 Service Manual

VE-TVPEINJECTION PUMP ~
Adjustment (Cont'd)
IDLE SPEED ANDMAXIMUM SPEEDADJUSTMENT
CAUTION:
• Donot remove sealingcapsunless absolutely necessary.
• Never disturb full-load adjusting screwbecause thisalters
the mixture ratioandmay result inserious engineprob-
lems.
• Donot adjust maximum speedadjusting screwtoapoint
exceeding specifications, becauseexceeding themaximum
speed maycause engine damage.
• When attaching tachometer pickup,remove fueltUbe
clamps. (Refertotachometer instructions.)
Idle speed adjustment •

• Refer toMA section.

Idle speed:
700~
~o
rpm
SEF156R Maximum speedadjustment

1. Start engine andwarm itup until coolant temperature indi-
cator points tomiddle ofgauge.
2. Connect tachometer pickuptoNO.1 fuelinjection tube.
• Refer tothe instructions ontachometer.
3. Depress accelerator pedalfullyunder no-load andread the
tachometer indication.

Maximum enginespeed(Under no-load):
5,400 rpm

4.
If
indication islower thanspecified maximum enginespeed,
adjust usingmaximum speedadjusting screw.
5. After adjustment, tightenlocknutsecurely andplug itwith
a sealing cap.

Dash potadjustment

1. Warm upengine tonormal operating temperature.
2. Attach tachometer andadjust touchspeed usingadjusting
screw.

Touch speed: 1,300rpm
EC-375

Nozzleside
Combustion
chamber side

SEF668A
SEF781A
SEF669A

:S
older ~Adiusting shim

c:,
Nozzlespring

~ '~[;{~I:,""'
pi,",

Nozzle needle~~(''''-
Nozzle bOdyr ~
Nozzle nut)
SEF670A INJECTION
NOZZLE

CAUTION: Plug flare nutwith acap orrag sothat nodust enters thenoz-
zle. Cover nozzle tipfor protection ofneedle.

Removal andInstallation

1. Remove fuelinjection tubeandspill tube.
2. Remove injection nozzleassembly.
Also remove washers fromnozzle end.
3. Install injection nozzleinthe reverse orderofremoval.
Injection nozzletoengine:
~: 59-69 N'm (6.0-7.0 kg-m, 43-51 ft-Ib)
Injection nozzletotube:
~: 22-25 N'm (2.2-2.5 kg-m, 16-18 ft-Ib)
Spill tube:
~: 39-49 N'm (4.0-5.0 kg-m, 29-36 ft-Ib)
a. Always cleanthenozzle holes.
b. Always usenew injection nozzlegasket.
c. Note thatsmall washer shouldbeinstalled inspecified
direction.
d. Bleed airfrom fuelsystem.

Disassembly
1. Loosen nozzlenutwhile preventing nozzletopfrom turning.
2. Arrange alldisassembled partsinthe order shown atleft.

EC-376

relay-2ENGINE
ANDEMISSION CONTROLOVERALLSYSTEM
Component PartsLocation
Engine coolant
temperature sensor
Glowplugs
•

EC-383 SEF159R

ENGINEANDEMISSION CONTROLOVERALLSYSTEM
System Diagram
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SEF160R

ENGINEANDEMISSION CONTROLOVERALLSYSTEM
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EC-385

ENGINEANDEMISSION CONTROL OVERALLSYSTEM
System Chart

Ignition key
Engine coolant temperature
sensor Quick-glow
system
Partial loadadvance (PLA)
control Glow
relay
&
glow lamp
Solenoid timer
Engine speedsensor
Air conditioner switch
Battery voltage
Vehicle speedsensor
ECM

(Engine
control module) Coolingfancontrol
Air conditioner cutcontrol

EC-386
Cooling
fanrelay
Air conditioner relays

ECMINSPECTION TABLE TROUBLE
DIAGNOSES ~
ECM Terminals andReference Values(Coni'd)

-Data arereference values.
TER-
MINAL ITEM CONDITION -DATA
NO.
IEngineisrunning.1
L Both
AIC
switch andblower fanswitch areApproximately
OV
8 Air
conditioner relay "ON".
IEngine isrunning.1
BATTERYVOLTAGE
LAIC switchis"OFF". (11
-14V)
IEngine isrunning.1
BATTERY VOLTAGE
Cooling fanrelay (Low L
Cooling fanisnot operating. (11-14V)

9
speed) IEngineisrunning
I

L
Cooling fanisoperating. 1V
IEngine isrunning.1
BATTERYVOLTAGE
Cooling fanrelay (High
t

Cooling fanisnot operating.
(11-14V)
10 Cooling
fanisoperating atlow speed.
speed) IEngineisrunning.1

L
Cooling fanisoperating athigh speed. 1V
0- 5.0V
15 Engine
coolant temperature
IEngineisrunning.1 Output
voltage varieswith
sensor enginecoolant temperature.
25 jlgnitionswitch"ON"I BATTERY
VOLTAGE
37 Power
supply forECM
(11-14V)
jlgnition switch"ON"I
ApproximatelyOV
28 Startsignal
llgnitionswitch"START"I SA
TTERY VOLTAGE
(11 -14V)
Ilgnition keyisnot inserted.1
OV
BATTERY VOLTAGE (11-
30 Key-in
switch
14V)[for3seconds at
Ilgnition keyisinserted.1
enginecoolant temperature

-
ofapprox. 60°C(140°F) or
less)
IEngine isrunning.1

L
Both airconditioner switchandblower fanApproximately
OV
31 Airconditioner switch switch
are"ON".
IEngine isrunning.1
BATTERYVOLTAGE

L
Airconditioner switchis"OFF". (11
-14V)
38 Power
supply Ilgnition
switch"OFF"I BATTERY
VOLTAGE
(11 -14V)
106 Glowrelay
Referto"Quick-glow System".

EC-388

TROUBLEDIAGNOSES ~
ECM Terminals andReference Values(Cont'd)
*Data arereference values.
TER-
MINAL ITEM CONDITION
*DATA
NO.
IEngineisrunning.1
BATTERYVOLTAGE

L
Engine coolant temperature islower than
(11-14V)

we
(50'F).
108 Solenoid timer
/Engineisrunning.1

L
Engine coolant temperature ishigher than Approximately
OV

we
(50'F).
EC-389
•

TROUBLEDIAGNOSES
Quick-glow System
SYSTEM DESCRIPTION

Ignition key
Engine coolant temperature sensorKey-in
switch andkeyposition
Engine coolant temperature
ECM

(Engine
control
module) Glow
relay
Glow lamp Glow
plugs
Ignition START[~

~

switch

~~[ I
11
I

1iI

Key

~

switch OUT
-II-
T,

I
!

I
I-l

Key ONe
n

Hn
JTl-

.1"l....!:.1L-

~

timer
OFF
Ir1
To
I

UL
HTo
HT'o
Lamp ON
[
..Lfl

o~~
I
I-.J
TL
I

~
I

I-l
TL

I
I
I
I
I

HTL
I-l

T'L
Relay OFF
[j
I_
L-
r--L

.f"l.-.JL

~

T.

"'
II

I

II
~
1r;,1

I II I
I,

Glow plug
temperature
Normaloperation
Operationafter
key timer isOFF Leaving
keyin
ON position Repeating
keyIN
and OUT Repeating
keyON
and OFF
TL
=
T,-T,
when T,-0.5 >T,

TL
= T,

when T,-0.5 ~T,
;a;
To
TL

=.
T,

when To
<
T, T'o
~80% ofTo
when T.
5':
3sec.
T',

=.
T,

T',
=.
T,

SEC550B

When theignition keyisinserted intothekey
cylinder, theengine control module turnsonthe
relay andthe"high-level" electriccurrentflows
through theglow plugs andheats themup
quickly. Whentheignition switchisturned on,the
control module turnsonthe indicator. AfterT
1

seconds havepassed fromkeyin,the control
module turnsoffthe indicator. While
cranking, therelay remains on.The relay
automatically turnsoffafter T
4
seconds have
passed fromtheengine start.

Engine coolant temperature sensor
Second Enginecoolant tempera-' Remarks
ture 'C('F) Resistance
(kQ)
To
3.1
-3.9

- -

5.0 -7.0 -25(-13)
19.7

T,
1.8
-3.2
20(68)
2.5
0.8 -2.2 60(140)
0.6
17.0 -23.0
Lowerthan
60(140)

Morethan
0.6

T
3

40-6.0

Higherthan
60(140)

Lessthan
0.6
255 -345
Lowerthan
60(140)

Morethan
0.6

Whenalternator is

T
4

working
Less than
10

Higherthan
60(140)

Lessthan
0.6
15 -25

Lowerthan
60(140)

Morethan
0.6

Whenalternator isnot

(T
4)

working

3 -7

Higherthan
60(140)

Lessthan
0.6

T
5
0.1-0.9

- -

EC-390

TROUBLEDIAGNOSES
Quick-glow System(Cont'd)
DESCRIPTION
Engine coolant temperature sensor(ECTS)

The engine coolant temperature sensordetects enginecoolant
temperature andtransmits asignal tothe ECM.
Electrical resistance ofthe thermistor decreases inresponse to
the temperature rise.

Key-in switch

The key-in switch isbuilt intothekey cylinder. TheECM detects
the key position andcontrols thekey-in glowsystem.

SEF938P
EC-391
•