1995 NISSAN ALMERA N15 Head lamp

BASICSERVICE PROCEDURE
Idle Speedllgnition TiminglldleMixtureRatio
Adjustment
PREPARATION
• Make surethatthefollowing partsarein
good order.
(1) Battery
(2) Ignition system
(3) Engine oiland coolant levels
(4) Fuses
(5) ECM harness connector
(6) Vacuum hoses
(7) Airintake system
(Oil filler cap,oillevel gauge, etc.)
(8) Fuel pressure
(9)' Engine compression
(10) Throttle valve
(11) EGR valve operation -For Europe and
Israel andAustralia, andGA15DE M/Tmod-
els
Overall inspection sequence

INSPECTION
(12)
Evaporative emissionsystem
• On models equipped withairconditioner,
checks shouldbecarried outwhile theair
conditioner is"OFF".
• On models equipped withautomatic
transaxle, whenchecking idlespeed, ignition
timing andmixture ratio,checks shouldbe
carried outwhile shiftlever isin
"N"
position.
• When measuring
"CO"
percentage, insert
probe morethan40cm (15.7 in)into tailpipe .•
• Turn offheadlamps, heaterblower, rear
defogger.
• Keep frontwheels pointed straight ahead.
• Make thecheck afterthecooling fanhas
stopped.

Perform diagnostic testmode
1/

(Self-diagnostic results).
Check
&
adjust ignition timing.
Check
&
adjust idlespeed. NG
Repair orreplace.
Check oxygen sensor*1 function.

OK
Check
oxygen sensor*1 har-
ness.
Check CO%.

NG
NG
Repair orreplace harness.
OK Replace oxygensensor*1.
INSPECTION END Check
emission controlparts NGCheck oxygen sensor*1 function. OK
and repair orreplace ifneces-
sary.
*1: Heated oxygen sensor(ForEurope andIsrael, andAustralia AfTmodels)
Oxygen sensor(Except forEurope andIsrael, andAustralia AfTmodels)

EC-35

TROUBLEDIAGNOSIS -General Description

Goto
(J.

Adjust ignition timingby
turning distributor.

No
NG

(Go to
@
onnext page.)

OK
CONNECT
CONSULTTOTHE VEHICLE.

Connect "CONSULT" tothe data link
connector forCONSULT andselect
"ENGINE" fromthemenu. Referto

EC-36
DOES ENGINE START?
BEFORE
STARTING

1. Check service records forany recent
repairs thatmay indicate arelated •
problem, orthe current needfor
scheduled maintenance.
2. 9pen engine hoodandcheck thefol.
lowing:
• Harness connectors forimproper con-
nections
• Vacuum hosesforsplits, kinks,or
improper connections
• Wiring forimproper connections,
pinches, orcuts

CHECK IGNITION TIMING.

1. Warm upengine sufficiently.
2. Stop engine anddisconnect throttle
position sensorharness connector.
3. Start engine.
4. Check ignition timingatidle using
timing light.

Ignition liming:

Refer toEC-36.
Basic
Inspection
Precaution:
Perform BasicInspection withoutelectrical or
mechanical loads

applied;
• Headlamp switchisOFF,
• Air conditioner switchisOFF,
• Rear defogger switchisOFF,
• Steering wheelisin the straight-ahead position,etc.

m

\\

~
~ SEF1421

~use box

~-~

vll-JI-
Datalinkconnector~'

EC-65

TROUBLEDIAGNOSES -General Description ~
ECM Terminals andReference Value(Conl'd)

TER- WIRE
MINAL COLOR ITEM
CONDITION DATA
NO.
ILightingswitch"ON"I BATTERY
VOLTAGE
60
RIG

Headlamp switch (11
-14V)
ILighting switch"OFF"I
ApproximatelyOV
0- 5.0V
63 RIY Intake
airtemperature

I
Engine isrunning.
I
Output
voltage varies
sensor with
intake airtempera-
ture.
64 GIR
I

Engine isrunning.
I
Approximately
OV
65 GY/L Data
linkconnector for

L
Idle speed (CONSULT isconnected andApproximately
4-9V
CONSULT
68
GIW

turnedon) Approximately
3.5V
I,gnition switch"OFF"
I
BATTERY
VOLTAGE
70
W/L

Powersupply (Back-up)
(11-14V)
Ilgnition switch"ON"I BA
TTERY VOLTAGE
IACV-AAC valve (11
-14V)
101 SS
(Open)
I

Engine isrunning.
I
(Warm-up condition)

L
Engine speedis2,000 rpm. 0-
4V
102 RIB Injector
No.1
104
GIS
InjectorNo.3
BATTERYVOLTAGE
107 YIB InjectorNo.2 Engine
isrunning
(11-14V)
109 LIB Injector
No.4
IEngineisrunning.
I
(Warm-up condition)

~ MIT
models: Jackupfront wheels anddrive BATTERY
VOLTAGE
EGR valve
&
EVAP can-

L
wheels at16 kmlh (10mph) (11
-14V)
103 P
.isterpurge control sole-
Enginespeedis2,000 rpm.
noid valve
IEngineisrunning.
I
(Warm-up condition)

L
Idle speed Approximately
OV
106 BIY ECCSground
I

Engine isrunning.
I

Engineground

L
Idle speed
112 BIY ECCS
ground
I

Engine isrunning.
I

Engineground

L
Idle speed
I Engine isrunning.
I

BATTERYVOLTAGE

L
Idle speed
.

(11-14V)
114 YIR VTCsolenoid valve

I
Engine isrunning.
I

L
Engine speedis2,000 rpm. Approximately
OV
IEngine isrunning.
I

BATTERYVOLTAGE
Heated oxygen sensor

L
Engine speedisabove 3,200rpm. (11
-14V)
115 OR heaterground
IEngine isrunning.
I

(A/T models)
ApproximatelyOV

L
Engine speedisbelow 3,200rpm.
118 SlY ECCS
ground
I

Engine isrunning.
I

Engineground

L
Idle speed

EC-82

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

BASICSERVICE PROCEDURE
Idle Speedllgnition TiminglldleMixtureRatio
Adjustment
PREPARATION

• Make surethatthefollowing partsarein
good order.
(1) Battery
(2) Ignition system
(3) Engine oiland coolant levels
(4) Fuses
(5) ECM harness connector
(6) Vacuum hoses
(7) Airintake system
(Oil filler cap,oillevel gauge, etc.)
(8) Fuel pressure
(9) Engine compression
(10) Throttle valve

Overall inspection sequence

INSPECTION
•
•
•
•
•
•
On
models equipped withairconditioner,
checks shouldbecarried outwhile theair
conditioner is"OFF".
On models equipped withautomatic
transaxle, whenchecking idlespeed, ignition
timing andmixture ratio,checks shouldbe
carried outwhile shiftlever isin "N" position.
When measuring "CO"percentage, insert
probe morethan40cm (15.7 in)into tailpipe.
Turn offheadlamps, heaterblower, rear
defogger. Keep frontwheels pointed straight ahead.
Make thecheck afterthecooling fanhas
stopped.
•

Perform diagnostic testmode II
(Self-diagnostic results).

OK

Check
&
adjust ignition timing.
Check
&
adjust idlespeed.
Check heated oxygen sensor
function. NG
Repair orreplace.
NG Check heated oxygen sensor
harness. NG
Repair orreplace harness.
OK OK
Check CO%. OKReplace heatedoxygen sensor.

NG

INSPECTION END Check
emission controlparts
and repair orreplace ifneces-
sary.

EC-243
NG
Check heated oxygen sensor
function.
OK

@

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

TROUBLEDIAGNOSIS -General Descrip_ti_on
1S_R_'

Basic Inspection
Precaution:
Perform BasicInspection withoutelectrical ormechanical loads
applied;
• Headlamp switchisOFF,
• Air conditioner switchisOFF,
• Rear defogger switchisOFF,
• Steering wheelisinthe straight-ahead position,etc.

m

BEFORE STARTING

1. Check service records forany recent •
repairs thatmay indicate arelated
problem, orthe current needfor
scheduled maintenance.
2. Open engine hoodandcheck thefol-
lowing:
• Harness connectors forimproper con-
nections
• Vacuum hosesforsplits, kinks,or
improper connections
• Wiring forimproper connections,
pinches, orcuts
Goto
(I.

No

CONNECT
CONSULTTOTHE VEHICLE.

Connect "CONSULT" tothe data link
connector forCONSULT andselect
"ENGINE" fromthemenu. Referto

EC-254.
DOES ENGINE START?

\\

~
~ SEF1421

START

•
IGN TIMING ADJ.
0

IGNITION TIMINGFEEDBACK
CONTROL WILLBEHELD BY
TOUCHING START
AFTER DOING SO,ADJUST
IGNITION TIMINGWITHA
TIMING LIGHTBYTURNING
THE CAMSHAFT POSITION
SENSOR.

SEF555N
Yes

CHECK IGNITION TIMING.

(ij\
1.Warm upengine sufficiently.
~ 2.Select "IGNTIMING ADJ"in
"WORK SUPPORT" mode.
3. Touch "START".
4. Check ignition timingatidle
using timing light.

Ignition timing:
15°::f:2° BTDC

~ 1Warm upengine sufficiently.

~ 2:
Stop engine anddisconnect
throttle position sensorhar-
ness connector.
3. Start engine.
4. Check ignition timingatidle
using timing light.

Ignition timing:
15°::f:2° BTDC
OK

(Go to
@
onnext page.) Adjust
ignition timingby
turning distributor.

EC-271

HOWTOREAD WIRING DIAGRAMS
Wiring Diagram Codes(CellCodes)

Use thechart below to'find outwhat each wiring diagram code•
stands for,

Code Section WiringDiagram Name
AACIV ECIACV-AAC
Valve
ABS BR
Anti-lock BrakeSystem
A/C HAManualAirConditioner
A/CCUT ECAir
Conditioner CutControl
A/T ATAutomatic Transmission
AIM ELHeadlamp System
AIRREG ECIACV-Air Regulator
AT/C ECA/TControl
AUDIO ELAudio
BACK/L ELBack-up Lamp
CHARGE ELCharging System
CHIME ELWarning Chime
CMPS EC
Camshaft PositionSensor
COOllF ECCooling
FanControl
DEF ELRearWindow Defogger
D/LOCK ELPowerDoorLock
DTRL ELHeadlamp
-With Daytime Light
System
ECTS ECEngine
Coolant Temperature
Sensor
EGR andcanister ControlSolenoid
EGRCIV EC
Valve
FCUT ECFuel
CutSolenoid Valve
F/FOG ELFront
FogLamp
FICO ECIACV-FICD
SolenoidValve
F/PUMP ECFuel
Pump
GLOW ECQuick-glow
system
H/LAMP ELHeadlamp
-Without Daytime
Light System
H/SEAT ELHeated
Seat
HEAT HA
Heater
HLC ELHeadlamp
Washer
H02S ECHeated
Oxygen Sensor
HORN ELHorn,
Cigarette Lighter,Clock
IATS ECIntake
AirTemperature Sensor
IGN/SG ECIgnition
Signal
ILL ELIllumination
INJECT ECInjector
INT/L ELInterior,
SpotandTrunk Room
Lamps Code
Section WiringDiagram Name
KS ECKnock
Sensor
LKUP ECTorque
Converter ClutchSolenoid
Valve
LOAD ECLoadSignal
MAFS ECMass
AirFlow Sensor
MAIN ECMain
Power Supply andGround
Circuit
METER ELSpeedometer,
Tachometer,Temp.
and Fuel Gauges
MIL ECMIL,
Data LinkConnector For
CONSULT
MIRROR ELDOOR
MIRROR
NATS ELNISSAN
ANTI-THEFT SYSTEM
02S ECOXYGEN
SENSOR
EC EVAP
CANISTER PURGECON-
PGCIV TROLSOLENOID VALVE
PLA ECPARTIAL
LOADADVANCE CON-
TROL
EC PARK/NEUTRAL
POSITION
PNP/SW SWITCH
POWER ELPOWER
SUPPLY ROUTING
POWER STEERING OILPRESSURE
PST/SW EC
SWITCH
R/FOG ELREAR
FOGLAMP
SROOF ELSUN
ROOF
SUPPLEMENTAL RESTRAINTSYS-
SRS RS
TEM
S/SIG ECST
ART SIGNAL
START ELSTARTING
SYSTEM
STOP/L ELSTOP
LAMP
TAllIL ELCLEARANCE,
LICENSE,ANDTAIL
LAMPS
TPS ECTHROTTLE
POSITIONSENSOR
TURN SIGNAL ANDHAZARD
TURN EL
WARNING LAMPS
VSS ECVEHICLE
SPEEDSENSOR
VTC ECVTC
SOLENOID VALVE
WARN ELWARNING
LAMPS
WINDOW ELPOWER
WINDOW
WIPER ELFRONT
WIPERANDWASHER
WIP/R ELREAR
WIPER ANDWASHER
GI-17