1995 NISSAN ALMERA N15 Service Manual

Repairharness orcon-
nectors. INSPECTION
END
Check thefollowing.
• Harness connectors

QD,@orQD,

@

• 10A fuse
• Harness foropen or
short between IACV-AAC
valve andfuse
If NG, repair harness or
connectors.

NG OK
NG
OK

INSPECTION
START
CHECK OVERALL FUNCTION.
1. Start engine andwarm itup suffi-
ciently.
2. Check idlespeed.
If NG, adjust idlespeed.
~ 3.• Perform "AACVALVE
~ ADJ"or"IACV-AACIV
ADJ" in"WORK
SUPPORT" modewith
CONSULT.
• Disconnect throttleposi-
tion sensor harness con-
nector.
4. Make surethatidlespeed drops.

OK
@

CHECK
POWER SUPPLY.
1. Stop engine.
2. Disconnect IACV-AACvalveharness
connector.
3. Turn ignition switch"ON".
4. Check voltage between terminal
@

or
G)
and ground.

Voltage: Batteryvoltage

CHECK OUTPUT SIGNALCIRCUIT.
1. Turn ignition switch"OFF".

(ij\
2.Reconnect IACV-AACvalve
~ harnessconnector andthen
start engine.
3. Perform "IACV-AACIV
SYSTEM" in"FUNCTION
TEST" modewithCONSULT.

OR

(F.I\
3.Perform "IACV-AACIV
~ OPENING" in"ACTIVE TEST"
mode withCONSULT.

OR

M
2.Disconnect ECMharness con-
~ nectar.
3. Check harness continuity
between ECMterminal
(ill)

or
@
and terminal
@,
ECM
terminal
GID
or
@
and
terminal
@.

Continuity shouldexist.
If
OK, check harness forshort.

SEF233R
SEF142NC

o

•
ACTIVE TEST.
LET
ENGINE IDLE
THEN
TOUCH START

(AiC
SW-UGHT SWOFF)
•
IACV-AACN SYSTEM.
I ACV-AACN 34%
OPENING

==========
MONITOR
==========

CMPS-RPM (REF)712rpm
MAS AIRIFL SE 1.13V
COOLAN TEMPtS 92°C

TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
ffiJ

Idle AirControl Valve(IACV) -Auxiliary Air
Control (AAC)Valve(Cont'd)
DIAGNOSTIC PROCEDURE

!:::=====mul===

I
NEXT" START
I

MEF176E

CD
:
For Europe andIsrael

@ :
Except forEurope andIsrael
~

Ii)

~i5~i5
dfu
CillffuID

illU--illU
~[]fl[OOWN][Qill SEF484Q
EC-154

•

Replace
IACV-AAC valve.

NG

Trouble isnot fixed.

OK
COMPONENT INSPECTION
IACV-AAC valve-Except forEurope andIsrael
Disconnect IACV-AACvalveharness connector.
• Check resistance betweenterminals @and
CID,CID
and
@.
Resistance: 50-1000 [at25°C
(7rF)]

CHECK
COMPONENT
(IACV-AAC valve).
Refer to"COMPONENT INSPECTION"
below.
Disconnect andreconnect harnesscon-
nectors inthe circuit. Thenretest.
Check ECMpinterminals fordamage
or the connection ofECM harness con-
nector. Reconnect ECMharness con-
nector andretest.

SEF150R
TROUBLE
DIAGNOSIS FORNON-DETECTABLE ITEMS
[ill

Idle AirControl Valve(IACV) -Auxiliary Air
Control (AAC)Valve(Cont'd)

@

II

Except
forEurope andIsrael

~io

[!J

For Europe andIsrael

~io ~io

1=1
=E=CM=19'CONNECTORII
cffu

113

AEC845IACV-AAC VALVE-For Europe andIsrael
• Check IACV-AAC valveresistance.
Resistance: Approximately 100[at25°C (77°F))
• Check plunger forseizing orsticking.
EC-155

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS

Cooling FanControl

SYSTEM DESCRIPTION
Vehicle speedsensor
Engine coolant temperature sensor
Air conditioner switch Vehicle
speed
Engine coolant temperature
Air conditioner "ON"signal
EGM

(EGGS
control
module) Gooling
fan relay(s)
MIT MODELS
The ECM controls thecooling fancorresponding tothe vehicle speed,engine coolant temperature, and
air conditioner ONsignal. Thecontrol system has2-step control [ON/OFF].

Operation
For Europe withdaytime lightsystem

E~
::J
0

~Z;
2i
o

E

~
~

'0
o

o

Gl

c

'0>
c

w
Air
conditioner switchIs"OFF".

/,

100 (212)

95 (203)

rr

20 80

(12) (50)

Vehicle speedkm/h(MPH)

D :
Cooling fansdonot operate.
~
iL
Airconditioner switchIs"ON".

~ ~ 11'l1/1~~~
:v
() /'/"

0.
0

E
~

!
95(203)

.~ 2080

ill
(12)(50)

Vehicle speedkm/h(MPH)

EZ2l :
Cooling fansoperate.
SEF902P

For Europe withoutdaytime lightsystem andAustralia

Gl_

2~
.,
-

:v ()

0.0

E
~
~

'0
o

o

Gl

c

'0>
c

w
Air
conditioner switchIs"OFF",

105 (221)

95 (203)
91 (196)

2080

(12) (50)

Vehicle speedkm/h(MPH)

D :
Cooling fansdonot operate.
Air
conditioner switchIs"ON",

100 (212)

2080

(12) (50)

Vehicle speedkm/h(MPH)
~ :Cooling fansoperate.
SEF649MB
EC-156

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS

Cooling FanControl (Cont'd)

AIT MODELS

The ECM controls thecooling fancorresponding tothevehicle speed,engine coolant temperature, and
air conditioner ONsignal. Thecontrol system has3-step control
[HIGH/LOW/OFF],

Operation
For Europe withdaytime lightsystem

•

SEF904P

Air
conditioner switchIs"ON".

105 (221)
100 (212)
95 (203)

Air
conditioner switchIs"OFF".

95 (203)

105
(221)
100 (212)

C

'0
o

()

Q)

c

'0>
c

UJ
~
iL

::J
0

e;-
~o

E
~

C

'0
o

()

Q)
~ 00
i~
00

(12) (50)
tD
(12)(50)

Vehicle speedkm/h(MPH) Vehiclespeedkm/h(MPH)

o :
Cooling fansdonot operate. ~:Cooling fansoperate at"Low" speed. ~:Cooling fansoperate at"High" speed.
For Europe withoutdaytime lightsystem andAustralia

SEF905P

Air
conditioner switchis"ON",

105 (221)
100 (212)
95 (203)

Air
conditioner switchIs"OFF".

95 (203)
91 (196)
105
(221)
100 (212)

~

'0
o

()

Q)

c

'0>
c

UJ
~~
::J
0

(;j-

.... 0

~o

E

2

C

'0
o

()

Q)

~ 00
i~
00

(12) (50)
tD
(12)(50)

Vehicle speedkm/h(MPH) Vehiclespeedkm/h(MPH)

o :
Cooling fansdonot operate.
l22a:
Cooling fansoperate at"Low" speed. ~:Cooling fansoperate at"High" speed.

EC-157

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Cooling FanControl (Cont'd)

EC-COOL/F-01

BATTERY (Via
fusible link)
IGNITION
SWITCH
ON or START

10A

1251
FUSE
BLOCK
(JIB)
(E106)
30A

IT]
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to
EL-POWER.
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EC-158

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Cooling FanControl (Cont'd)

EC-COOL/F-02

•

LHD

A/T
models
for Europe without
daytime lightsystem
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EC-159

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Cooling FanControl (Cant'd)
GA16DE forAustralia

EC-COOL/F-01

IGNITION SWITCH
ON orSTART BATTERY
(Via
fusible link)

10A

1251
FUSE
BLOCK
(JIB)

(Ei06)
30A

o
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101 102
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113
114
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116
117
118

HEC076
EC-160

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
Cooling FanControl (Cont'd)
GA 16DE forAustralia

EC-COOL/F-02

•

COOLING
FAN
MOTOR-2

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@

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models

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models
Models with
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