1995 NISSAN ALMERA N15 AUX

CONTENTS(Cont'd.)

CONSULT Reference ValueinData Monitor
Mode 74
Major Sensor Reference GraphinData
Monitor Mode 76
ECM Terminals andReference Value 78

TROUBLE DIAGNOSIS FORPOWER SUPPLY 88

Main Power Supply andGround Circuit.. 88

TROUBLE DIAGNOSIS FORDTC11 94

Camshaft PositionSensor(CMPS) 94

TROUBLE DIAGNOSIS FORDTC
12 101
Mass AirFlow Sensor (MAFS) 101

TROUBLE DIAGNOSIS FORDTC
13 108
Engine Coolant Temperature Sensor(ECTS) 108

TROUBLE DIAGNOSIS FORDTC
21 113
Ignition Signal 113

TROUBLE DIAGNOSIS FORDTC
34 119
Knock Sensor (KS) 119

TROUBLE DIAGNOSIS FORDTC
41 124
Intake AirTemperature Sensor(IATS) 124

TROUBLE DIAGNOSIS FORNON-DETECTABLE
ITEMS , '"
.128
Throttle Position Sensor 128
Vehicle SpeedSensor (VSS) 133
Start Signal 138
Injector 141
Fuel Pump 145
Idle AirControl Valve(IACV) -Auxiliary Air
Control (AAC)Valve 150
Cooling FanControl 156
Power Steering OilPressure Switch 169
Park/Neutral PositionSwitch 173
EVAP Canister PurgeControl Solenoid Valve179
EGR Valve andEVAP Canister PurgeControl
Solenoid Valve 183
Heated Oxygen Sensor(H02S) 189
Oxygen Sensor(02S) 194
Valve Timing Control (VTC) 198
IACV-FICD SolenoidValve 204
Electrical LoadSignal 211
Torque Converter ClutchSolenoid Valve 219
MIL
&
Data LinkConnectors 223

SR
ENGINE ANDEMISSION CONTROL OVERALL
SYSTE M
226
Circuit Diagram 226
System Diagram 227
ECCS Component PartsLocation 228
Vacuum HoseDrawing 231
System Chart... 232
ENGINE
ANDEMISSION BASICCONTROL
SYSTEM DESCRiPTION
233
Multipart FuelInjection (MFI)System 233
Distributor Ignition
(01)
System 235
Air Conditioning CutControl 236
Fuel CutControl (atnoload
&
high engine
speed) 237

EVAPORATIVE EMISSIONSYSTEM
238
Description 238
Inspection 238

POSITIVE CRANKCASE VENTILATION
240
Description 240
Inspection 240

BASIC SERVICE
PROCEDURE 241
Fuel Pressure Release 241
Fuel Pressure Check 241
Fuel Pressure Regulator Check 242
Injector Removal andInstallation 242
Idle Speed/Ignition Timing/IdleMixtureRatio
Adjustment 243

ON-BOARD DIAGNOSTIC SYSTEMDESCRIPTION ..250

Malfunction IndicatorLamp(MIL) 250
CONSULT 254

TROUBLE DIAGNOSIS -General Description
264
Introduction 264
Work Flow 265
Description forWork Flow 266
Diagnostic Worksheet 267
Diagnostic TroubleCode(DTC) Chart 268
Fail-Safe Chart 270
Basic Inspection 271
Symptom MatrixChart. 274
CONSULT Reference ValueinData Monitor
Mode 277
Major Sensor Reference GraphinData
Monitor Mode 279
ECM"Terminals andReference Value 281

TROUBLE DIAGNOSIS FORPOWER SUPPLY
286
Main Power Supply andGround Circuit.. 286

TROUBLE DIAGNOSIS FORDTC
11 289
Camshaft PositionSensor(CMPS) 289

TROUBLE DIAGNOSIS FORDTC
12 293
Mass AirFlow Sensor (MAFS) 293

TROUBLE DIAGNOSIS FORDTC
13 297
Engine Coolant Temperature Sensor(ECTS) 297

TROUBLE DIAGNOSIS FORDTC
21 301
Ignition Signal 301

TROUBLE DIAGNOSIS FORDTC
34 306
Knock Sensor (KS) 306

CONTENTS(Cont'd.)
TROUBLE DIAGNOSIS FORDTC
43 309
Throttle Position Sensor 309

TROUBLE DIAGNOSIS FORNON-DETECTABLE
ITEMS
314
Vehicle SpeedSensor (VSS) 314
Start Signal 317
Exhaust GasRecirculation (EGR)Valveand
EVAP Canister PurgeControl 319
Injector 324
Fuel Pump 327
Idle AirControl Valve(IACV)-Air Regulator 332
Idle AirControl Valve(IACV) -Auxiliary Air
Control (AAC)Valve :335
Idle AirControl Valve(IACV)-FICD Solenoid
Valve '"339
Cooling FanControl 343
Power Steering OilPressure Switch 354
Park/Neutral PositionSwitch 357
Heated Oxygen Sensor(H02S) 362
Torque
Converter
ClutchSolenoid Valve 367
Malfunction IndicatorLamp(MIL)
&
Data Link
Connector (DLC)forCONSULT 370

CD
INJECTION SYSTEM
371

VE.TYPE INJECTION PUMP
372
Removal 372
Installation 373
Adjustment 374

INJECTION NOZZLE
376
Removal andInstallation 376
Disassembly 376
Inspection 377
Cleaning 377
Assembly 378
Test andAdjustment 379
FUEL
SYSTEM CHECK
381
Priming PumpCheck 381
Fuel CutSolenoid Valve 381

CRANKCASE VENTILATION SYSTEM
382
Ventilation Hose 382

ENGINE ANDEMISSION CONTROLOVERALL
SYSTEM
383
Component PartsLocation 383
System Diagram 384
Circuit Diagram ,385
System Chart. 386

TROUBLE DIAGNOSES
387
ECM Terminals andReference Values 387
Quick-glow System 390
Partial LoadAdvance (PLA)Control 399
Cooling FanControl 404
Air Conditioner CutControl 413
Fuel CutControl 416

GA

SERVICE DATAANDSPECIFICATIONS
(505).417
General Specifications 417
Inspection andAdjustment.. 417

SR
SERVICE DATAANDSPECIFICATIONS
(505).418
General Specifications 418
Inspection andAdjustment.. .418

CD
SERVICE DATAANDSPECIFICATIONS
(505).419
VE-type Injection Pump 419
Injection Nozzle 419
•

When youread wiring diagrams:
• Read GIsection, "HOWTOREAD WIRING DIAGRAMS" .
• See Elsection, "POWER SUPPLYROUTING" forpower distribution circuit.
When youperform troublediagnoses, readGIsection, "HOWTOFOllOW FLOWCHART INTROU-
BLE DIAGNOSES" and"HOW TOPERFORM EFFICIENT DIAGNOSIS FORANELECTRICAL INCIDENT".

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
SYSTEM DESCRIPTION Idle
AirControl Valve(IACV) -Auxiliary Air
Control (AAC)Valve

Camshaft positionsensor Engine
speed

I
Mass
airflow sensor Amount
ofintake air

I

Engine coolant temperature sensor Engine
coolant temperature

~

I

Ignition switch Start
signal

I

Throttle positionsensor Throttle
position

~

I

Inhibitor switch(A/Tmodels)/
Park/Neutralposition
Neutral position switch(M/Tmodels) ECM
(ECCS
Air conditioner operation control

!
IACV-AAC valve
I

Air conditioner switch
module)
Power steering oilpressure switch Power
steering loadsignal

I
Battery
~
Battery voltage
Vehicle speedsensor Vehicle
speed
Cooling fanrelay Cooling
fanoperation
Load switch' Electrical
load
Blower fanswitch Blower
fanoperation
': Rear window defogger switchandheadlamp switch.

This system automatically controlsengineidlespeed toaspecified level.Idlespeed iscontrolled
through fineadjustment ofthe amount ofair which bypasses thethrottle valveviaIACV-AAC valve.The
IACV-AAC valveopens andcloses (except forEurope andIsrael), orrepeats ON/OFF operation (for
Europe andIsrael), according tothe signal sentfrom theECM. Thecamshaft positionsensordetects
the actual engine speedandsends asignal tothe ECM. TheECM thencontrols theIACV-AAC valveso
that engine speedcoincides withthetarget valuememorized inECM. Thetarget engine speedisthe
lowest speedatwhich theengine canoperate steadily. Theoptimum valuestored inthe ECM isdeter-
mined bytaking intoconsideration variousengineconditions, suchasduring warmup,deceleration, and
engine load(airconditioner, powersteering andcooling fanoperation).

COMPONENT DESCRIPTION
IACV-AAC valve-Except forEurope andIsrael

The IACV-AAC valveismoved byopen andclose signals from
the ECM. When theopen signal issent tothe valve, theamount
of air that willflow through thevalve increases. Themore air
that flows through thevalve, thehigher theidle speed. When
the close signal issent tothe valve. theamount ofair
decreases.

EC-150

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS~
Idle AirControl Valve(IACV) -Auxiliary Air
Control (AAC)Valve(Cont'd)
IACV-AAC valve-For Europe andIsrael

The IACV-AAC valveismoved
by
ON/OFF pulsesfromtheECM.
The longer theON pulse, thegreater theamount ofair that will
flow through thevalve. Themore airthat flows through the
valve, thehigher theidle speed.

EC-151
•

TROUBLEDIAGNOSIS FORNON-DETECTABLE ITEMS
[EJ

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

EC-AAC/V-01

@:
ForEurope andIsrael

@:
Except for
@

-: Detectable line
for DTC
-: Non-detectable
line forDTC
Refer
toEL-POWER.
FUSE
BLOCK
(JIB)

~
10A

1251

IIN~91
BR
I

~-------~

BR BR

~T T@

@~ ~@

BR BR

BR

m
IACV-
AAC
VALVE

~ flQ):
@

SB
BR

~3
IACV-
AAC
VALVE

QID:@

~1!4J

PU/W 5B
SB

Ii1t3n
I5C
PU/W
5B

Ii1t3nffiru
ISC ISC

-C -0
ECM
(ECCS
CONTROL
MODULE)

(IT)

rn' 11fi]
@

3456 W
(ill

II~
@

4567B W
~rn

@
BR
~@

~BR
Refer
tolast page
(Foldout page).

HEC043
EC-152

TROUBLEDIAGNOSIS FORNO~-DETECTABLE ITEMS
[]K]

Idle AirControl Valve(IACV) -Auxiliary Air
Control (AAC)Valve(Cont'd)
GA 16DE forAustralia

EC-AAC/V-01

lOA

1251

II
N
;91
BR

. I

BR

IrfJl@
em

BR

I
FUSE

BLOCK
(JIB)

~
Refer
toEL-POWER.
_. Detectable line

for
DTC

-: Non-detectable
line forDTC
•

fIjl
I
I~
(IT)

3456 W
BR

~3
IACV-

AAC

VALVE

CEID

4=Uli4=ll

PU/W 58
PU/W 58

~~ ISC ISC

-c
-0

~CEID

~8R
ECM

(ECCS

CONTROL
MODULE)

em

Refertolast page
(Foldout page).

101 102
103
107
lOB
109
113 114
115 104
105106
110 111112
116
117
l1B

EC-153 HEC075

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