1995 NISSAN ALMERA N15 Idle speed control

SAT497GTROUBLE
DIAGNOSES
Road Testing (Cont'd)

"0"
POSITION

1. Manually moveselector leverfrom"N"to"D" position, and
note shiftquality.
2. Using theshift schedule asareference, drivevehicle in"D"
position. Record,onsymptom chart,respective vehicle
speeds atwhich up-shifting anddown-shifting occur.These
speeds aretobe read atthree different throttlepositions
(light, halfandfull), respectively. Alsodetermine thetiming
at which shocks areencountered duringshifting andwhich
clutches areengaged.

SAT612GA
3.Determine whetherlock-upproperly occurswhiledriving
vehicle inproper gearposition andatproper vehicle speed.
4. Check todetermine ifshifting tooverdrive gearcannot be
made whileODcontrol switchis"OFF".
5. Drive vehicle in"D
3"
position athalf tolight throttle posi-
tion. Keep driving at60 to70 km/h (34to43 MPH). FUlly
depress accelerator pedaltomake suretransaxle down-
shifts from3rdto2nd gear.
6. Drive vehicle in"D
2"
position athalf tolight throttle posi-
tion. Keep driving at25 to35 km/h (16to22 MPH). Fully
depress accelerator pedaltomake suretransaxle down-
shifts from2ndto1st gear.

"2"
POSITION

1. Shift to"2" position andmake surevehicle startsin1st
gear.
2. Increase vehiclespeedtomake suretransaxle upshiftsfrom
1st to2nd gear.
3. Further increase vehiclespeed.Makesuretransaxle does
not upshift to3rd gear.
4. Drive vehicle in"2
2"
position athalf tolight throttle position.
Keep driving at25 to35 km/h (16to22 MPH). Fullydepress
accelerator pedaltomake suretransaxle downshifts from
2nd to1st gear.
5. Allow vehicle torun idle while in"2" position tomake sure
that transaxle downshifts to1st gear.
6. Move selector leverto"D" position andallow vehicle to
operate at30 to40 km/h (19to25 MPH). Then,shiftto"2"
position tomake suretransaxle downshifts to2nd gear.

"1"
POSITION

1. Place selector leverin"1" position andaccelerate vehicle.
Make suretransaxle doesnotshift from 1stto2nd gear
although vehiclespeedincreases.
2. Drive vehicle in"1" position. Releaseaccelerator pedalto
make surethatengine compression actsasabrake.
3. Place selector leverin"D" or"2" position andallow vehi-
cle torun at15 to25 km/h (9to 16 MPH). Thenmove selec-
tor lever to"1" position tomake suretransaxle downshifts
to 1st gear.

AT-18

'-)
(

~)o

Front

SAT498GTROUBLE
DIAGNOSES
Pressure Testing(Cont'd)

• Oilleakage ator around oilpump, control valvebody, trans-
mission caseorgovernor
• Sticking pressure regulator valve
• Sticking pressure modifiervalve
2) When linepressure whileidling islow ataparticular
position, checkthefollowing.
• Ifoil leaks ator around low
&
reverse brakecircuit, line
pressure becomes lowin"R" position. Butline pressure is
normal in"P", "D", "2"or"1" position.
3) When linepressure ishigh while idling, pressure regulator
valve mayhave stuck.

GOVERNOR PRESSURETESTING

1. Check
AIT
and engine fluidlevels. Ifnecessary, addfluid.
2 .. Drive vehicle forabout 10minutes untilengine oiland ATF
reach operating temperature.

ATF operating temperature:
50 -80°C (122-176°F)

3. Install pressure gaugetogovernor pressureport.
4. Set parking brakeandblock rearwheels.
5. Jack upfront wheels.
6. Set selector leverinDposition anddrive vehicle.

Be careful ofrotating wheels.
•

Governor pressure:
• Governor pressureisnot generated whenvehicle is
stopped. (frontwheels arenotrotating.)
• Governor pressurerisesgradually inresponse tovehicle
speed. (frontwheel rotating speed.)

If not, check governor valveassembly. RefertoAT-36.

AT-27

ENGINECONTROL SYSTEM
SECTION
EC
CONTENTS
•

PRECAUTIONS ANDPREPARATION
4

Special Service Tools 4
Supplemental RestraintSystem(SRS)"AIR
BAG" (DualAirBag System) 7
Supplemental RestraintSystem(SRS)"AIR
BAG" (Single AirBag System) 7
GA,SR
PRECAUTIONS ANDPREPARATION
8

Engine Fuel
&
Emission ControlSystem 8
Precautions forECCS Trouble Diagnosis of
Engine 9
Precautions 9
ENGINE ANDEMISSION CONTROLOVERALL
SYSTEM 11
Circuit Diagram -Except forAustralia 11
Circuit Diagram -For Australia 12
System Diagram -GA 14DE, GA16DE for
Europe andIsrael 13
System Diagram -GA15DE 14
System Diagram -GA 16DE except for
Europe, IsraelandAustralia 15
System Diagram -GA 16DE forAustralia 16
ECCS Component PartsLocation -GA 14DE,
GA 16DE forEurope andIsrael 17
ECCS Component PartsLocation -GA15DE 18
ECCS Component PartsLocation -GA 16DE
except forEurope, IsraelandAustralia 19
ECCS Component PartsLocation -GA 16DE
for Austral ia 20
ECCS Component PartsLocation 21
Vacuum HoseDrawing 22

c=
~

GA
ENGINE
ANDEMISSION BASICCONTROL
SYSTEM DESCRiPTION 23
System Chart.. 23
Multiport FuelInjection (MFI)System 24
Distributor Ignition(01)System 27
Air Conditioning CutControl 28
Fuel CutControl (atnoload &high engine
speed) 28
EVAPORATIVE EMISSIONSYSTEM
29

Inspection 29
POSITIVE CRANKCASE VENTILATION 31
Description 31
Inspection 32
BASIC SERVICE PROCEDURE 33
Fuel Pressure Release 33
Fuel Pressure Check 33
Fuel Pressure Regulator Check 33
Injector Removal andInstallation 34
Idle Speed/lgnition Timing/ldleMixtureRatio
Adjustment ,35
ON-BOARD DIAGNOSTIC SYSTEMDESCRIPTION .44
Malfunction IndicatorLamp(MIL) 44
CONSULT .48
TROUBLE DIAGNOSIS -General Description
58

Introduction 58
Work Flow 59
Description forWork Flow 60
Diagnostic Worksheet 61
Diagnostic TroubleCode(DTC) Chart 62
Fail-Safe Chart 64
Basic Inspection 65
Fast IdleCam (FIC) Inspection and
Adjustment -For Europe andIsrael 68
Fast IdleCam (FIC) Inspection and
Adjustment -Except forEurope andIsrael. 68
Symptom MatrixChart 71

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".

ENGINEANDEMISSION BASICCONTROL SYSTEMDESCRIPTION
System Chart

I
Camshaft positionsensor

'1
Fuel
injection
&
mixture
ratio control Injectors
Knock sensor
Distributorignitionsystem Powertransistor
Mass airflow sensor
Engine coolant temperature
sensor
Ignition switch Idle
aircontrol system
Fuel pump control
*4

IACV-AAC valve(WithFICD
solenoid valve)
Fuel pump relay

•

'5

Throttle
positionsensor
Neutral positionllnhibitor
switch
Air conditioner switch ECM
(ECCS
control
module)
2

Oxygen sensormonitor

&
On-board diagnostic system

5
Torque converter clutchcan-
cel solenoid valvecontrol
(A/T models) Malfunction
indicatorlamp
(On theinstrument panel)
Torque converter clutchsole-
noid valve
VTC solenoid valve

*6
Air
conditioner relays
Cooling
fanrelay
EVAP canister purgecontrol
solenoid valve
Cooling
fancontrol
Air conditioner cutcontrol
during acceleration
Valve timing control
EVAP canister purgecontrol

7

6

Power
steering oilpressure
switch Battery
voltage
Intake airtemperature sensor

*3

I

Vehicle speedsensor

*2

I
Oxygen sensor

8
'8

Electrical load
• Rear defogger switch
• Lighting switch EGR

&
EVAP canister purge
control EGR
valve
&
EVAP canister
purge control solenoid valve
*1: Except forEurope andIsrael
*2: Heated oxygen sensor(ForEurope andIsrael, andAustralia A/Tmodels)
Oxygen sensor(Except forEurope andIsrael, andAustralia A/Tmodels)
*3: For Australia
*4: IACV-AAC valveandIACV-FICD solenoidvalve(ForEurope andIsrael)
IACV-AAC valve(withFICDsolenoid valve)(Except forEurope andIsrael)
'5: Except forEurope
*6: GA16DE exceptforEurope andIsrael
*7: GA16DE MITmodels exceptforEurope, IsraelandAustralia
*8: For Europe andIsrael andAustralia, andGA15DE MITmodels

EC-23

ENGINEANDEMISSION BASICCONTROL SYSTEMDESCRIPTION
Multipart FuelInjection (MFI)System
INPUT/OUTPUT SIGNALLINE

Camshaft positionsensor
Mass airflow sensor
Engine coolant temperature sensor

*1
Oxygen sensor
Throttle position sensor
Neutral position/Inhibitor switch
Vehicle speedsensor
~gnition switch
Air conditioner switch
Power steering oilpressure switch
Battery Engine
speedandpiston position
Amount ofintake air
Engine coolant temperature
Density ofoxygen inexhaust gas
Throttle position
Throttle valveidleposition
Gear position
Vehicle speed
Start signal
Air conditioner operation
Power steering loadsignal
Battery voltage ECM
(ECCS
control module) Injector
*1: Heated oxygen sensor(ForEurope andIsrael, andAustralia A/Tmodels)
Oxygen sensor(Except forEurope andIsrael, andAustralia A/Tmodels)

BASIC MULTIPORT FUELINJECTION
SYSTEM

The amount offuel injected fromthefuel injector
is determined bythe ECM. TheECM controls the
length oftime thevalve remains open(injection
pulse duration). Theamount offuel injected isa
program valueinthe ECM memory. Theprogram
value ispreset byengine operating conditions.
These conditions aredetermined byinput signals
(for engine speedandintake air)from boththe
camshaft positionsensorandthemass airflow
sensor.
VARIOUS
FUELINJECTION
INCREASE/DECREASE COMPENSATION

In addition, theamount offuel injected iscom-
pensated toimprove engineperformance under
various operating conditions aslisted below.

<
Fuel increase>
• During warm-up
• When starting theengine
• During acceleration
• Hot-engine operation
• When selector leverischanged from"N"to
"D"
(AfT
models only)
• High-load, high-speed operation

<
Fuel decrease>
• During deceleration

EC-24

ENGINEANDEMISSION BASICCONTROL SYSTEMDESCRIPTION
Distributor Ignition(DI)System
INPUT/OUTPUT SIGNALLINE

Camshaft positionsensor
Mass airflow sensor
Engine coolant temperature sensor
Throttle position sensor
Vehicle speedsensor
Ignition switch

*1
Knock sensor
Neutral position/Inhibitor switch
Battery
*1: Except forEurope andIsrael Engine
speedandpiston position
Amount ofintake air
Engine coolant temperature
Throttle position
Throttle valveidleposition
Vehicle speed
Start signal
Engine knocking
Gear position
Battery voltage ECM
(ECCS
control
module) Power
transistor
•

Tp

(msec)

1.75

~ 1.50

.~

~ 1.25

"S
0.

C
1.00
o

. ~ 0.75

E
A

N

600 1,000 1,4001,8002,200

Engine speed(rpm) SEF742M
SYSTEM
DESCRIPTION

The ignition timingiscontrolled bythe ECM tomaintain thebest
air-fuel ratioforevery running condition ofthe engine.
The ignition timingdataisstored inthe ECM. Thisdata forms
the map shown.
The ECM receives information suchasthe injection pulsewidth
and camshaft positionsensorsignal.Computing thisinforma-
tion, ignition signals aretransmitted tothe power transistor .
e.g., N:1,800 rpm,Tp:1.50 msec
AOBTDC
During thefollowing conditions, theignition timingisrevised by
the ECM according tothe other datastored inthe ECM.
• Atstarting
• During warm-up
• Atidle
• Hot engine operation
• During acceleration
• During high-load operation (VTCon)-GA 16DE except for
Europe andIsrael
Except forEurope andIsrael
The knock sensor retardsystem isdesigned onlyforemergen-
cies. Thebasic ignition timingisprogrammed withintheanti-
knocking zone,ifrecommended fuelisused under drycondi-
tions. Theretard system doesnotoperate undernormal driv-
ing conditions.
If engine knocking occurs,theknock sensor monitors thecon-
dition. Thesignal istransmitted tothe ECM (ECCS control mod-
ule). TheECM retards theignition timingtoeliminate theknock-
ing condition.

EC-27