1995 NISSAN ALMERA N15 check engine

Fluidleakage TROUBLE
DIAGNOSES
Preliminary Check(PriortoRoad Testing)
AIT FLUID CHECK
Fluid leakage check

1. Clean areasuspected ofleaking, -for example, mating
surface ofconverter housingandtransmission case.
2. Start engine, applyfootbrake, placeselector leverin"0"
position andwait afew minutes.
3. Stop engine.
4. Check forfresh leakage.

SAT288G
Fluidcondition check
Fluid levelcheck -Refer toMA section (CHASSIS AND
BODY MAINTENANCE).
Fluid
color
Oark orblack withburned odor
Milky pink
Varnished fluid,lighttodark brown
and tacky Suspected
problem
Wear offrictional material
Water contamination
- Road water entering through
filler tubeorbreather
Oxidation
- Over orunder filling
- Overheating

•

Road Testing

Perform roadtests using "Symptom" chart.Refertopage

AT-20.

"P"
POSITION

1. Place selector leverin"P" position andstart engine. Stop
engine andrepeat theprocedure inall positions, including
neutral position.
2. Stop vehicle onaslight upgrade andplace selector leverin
"P" position. Releaseparkingbraketomake surevehicle
remains locked.

"R"
POSITION

1. Manually moveselector leverfrom"P"to"R", andnote
shift quality.
2. Drive vehicle inreverse longenough todetect slippage or
other abnormalities.

"N"
POSITION

1. Manually moveselector leverfrom"R"and"0"to"N" and
note shift quality.
2. Release parkingbrakewithselector leverin"N" position.
Lightly depress accelerator pedaltomake surevehicle
does notmove. (When vehicle isnew orsoon afterclutches
have been replaced, vehiclemaymove slightly. Thisisnot
a problem.)

AT-17

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

TROUBLEDIAGNOSES
Stall Tasting
STALL TESTPROCEDURE

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

ATF operating temperature:
50 -80
0
e (122-176°F)
SAT6478
3.Set parking brakeandblock wheels.
4. Install atachometer whereitcan beseen bydriver during
test.

SAT513G 5.
~ ~ID
•

~c;>
SAT7678
Start
engine, applyfootbrake, andplace selector leverin

"0"
position.
6. Accelerate towide-open throttlegradually whileapplying
foot brake.
7. Quickly notetheengine stallrevolution andimmediately
release throttle.

• During test,never holdthrottle wide-open formore than5
seconds. Stall revolution .standard:
Refer toSDS, AT-166.
SAT514G
8.Move selector leverto"N" position.
9. Cool offATF.

• Run engine atidle foratleast oneminute.

10. Repeat steps5through 9with selector leverin"2", "1"and
"R
n
positions.

SAT7718 AT-24

TROUBLEDIAGNOSES

Pressure Testing
• Location ofpressure testport.
• Always replace pressure plugsasthey areself-sealing
bolts.

Test portfor
line pressure governor
pressure

SAT565D
LINEPRESSURE TESTPROCEDURE

1. Check AfTand engine fluidlevels. Ifnecessary, addfluid.
2. Drive vehicle forabout 10minutes untilengine oiland ATF
reach operating temperature.
ATF operating temperature:
50 -80°C (122-176°F)

SAT647B
3.Install pressure gaugetoline pressure port.
4. Set parking brakeandblock wheels.
Continue todepress brakepedalfullywhile performing line
pressure testatstall speed.

SAT513G
5.Start engine andmeasure linepressure atidle and stall
speed. Line pressure:
Refer toSOS, AT-166.

JUDGEMENT OFLINE PRESSURE TEST

• Ifline pressure doesnotrise, firstcheck tomake surethat
throttle wireisconnected properly.
1) When linepressure whileidling
is
low atall positions ("D",
"2", "1", "R"and"P"), theproblem maybedue to:

SAT494G •
Wear oninterior ofoil pump

AT-26

'-)
(

~)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

REMOVALANDINSTALLATION
Installation

• Drive platerunout

Maximum allowablerunout:
Refer toEM section ("Inspection", "CYLINDER
BLOCK").

If this runout isout ofallowance, replacedriveplatewith
ring gear.

SAT037C
•When connecting torqueconverter totransaxle, measure
distance "A"tobe certain thatthey arecorrectly assem-
bled.
Distance
"A":

Except model34X81
21.1 mm(0.831 in)ormore

Model 34X81

15.9 mm(0.626 in)ormore

o
AIT
toengine

o
Engine (gusset)
to
AIT
SAT573D

•Install converter todrive plate.

• With converter installed,rotatecrankshaft severalturnsto
check thattransaxle rotatesfreelywithout binding.

• Tighten boltsfixing transaxle

GA engine models

Bolt No. Tightening
torque Boltlength
"e"

N.m (kg-m, ft-Ib) mm
(in)

G)
30-40 (3.1 -4.1,22 -30) 50
(1.97)
@ .30-40 (3.1 -4.1, 22-30) 30
(1.18)
@ 16
-21 (1.6 -2.1,12 -15) 25
(0.98)

Front gusset to

30-40 (3.1 -4.1,22 -30) 20
(0.79)

engine
Rear gusset to

16-21 (1.6 -2.1,12 -15) 16
(0.63)

engine

AT-40

Boltlength
'T'

mm (in)

55 (2.17)
50 (1.97)
65 (2.56)
25 (0.98)
40 (1.57)

Tightening
torque
N'm (kg-m, ft-Ib)

70 -79 (7.1 -8.1,51 -59)
70 -79 (7.1 -8.1, 51-59)
70 -79 (7.1 -8.1,51 -59)
30 -40 (3.1 -4.1, 22-30)
30 -40 (3.1 -4.1, 22-30)

CD

@

@
@

@

Bolt
No.
• Reinstall anypart removed.
• Adjust throttle wireandcontrol cable.Referto"ON-VEHI-
CLE SERVICE", AT-33,35.
•. Check inhibitor switch.Referto"Electrical Components
Inspection", AT-3D.
• Refill transaxle withATFandcheck fluidlevel, AT-17.
• Move selector leverthrough allpositions tobe sure that
transaxle operatescorrectly. Withparking brakeapplied,
idle engine. Moreselector leverthrough "N"to"D", to"2",
to "1" and "R". Aslight shock should befelt through the
hand gripping theselector eachtimethetransaxle is
shifted. •
• Perform roadtest-Refer to"ROAD TESTING", AT-17.
i

REMOVAL
ANDINSTAllATION

Installation (Cont'd)
SR engine models
SAT638A
SAT558DA


AIT
toengine

@
Engine to

AIT
AT-41

SAT620EDISASSEMBL
Y

5. Set manual shaftto"P" position.
6. Remove inhibitorswitch.

Waste material

Oil
pan
SAT013D
7.
Remove oilpan andoilpan gasket.

• Donot reuse oilpan bolts.

8. Check foreign materials inoil pan tohelp determine cause•
of malfunction. Ifthe fluid isvery dark, smells burned, or
contains foreignparticles, thefrictional material(clutches,
band) mayneed replacement. Atacky filmthat willnotwipe
clean indicates varnishbuildup.Varnish cancause valves,
servo andclutches tostick andcaninhibit pumppressure.

• Iffrictional materialisdetected, replaceradiator afterrepair
of AlT. Refer toLC section ("Radiator", "ENGINECOOLING
SYSTEM").
SAT711D
9.
Remove controlvalveassembly according tothe following
procedures.
a. Remove controlvalveassembly mountingbolts@,
CID,
@

and @.

AT-51