Nissan Maxima 2000 User Manual

Release: February 2000 (01)

QUICK REFERENCE INDEX

GENERAL INFORMATION GI

MAINTENANCE MA

ENGINE MECHANICAL EM

MAXIMA QX

MODEL A33 SERIES

ENGINE LUBRICATION &
COOLING SYSTEMS

LC

ENGINE CONTROL SYSTEM EC
ACCELERATOR CONTROL,

FUEL & EXHAUST SYSTEMS

FE

CLUTCH CL

MANUAL TRANSAXLE MT

AUTOMATIC TRANSAXLE AT

FRONT & REAR AXLE AX

FRONT & REAR SUSPENSION SU

BRAKE SYSTEM BR

STEERING SYSTEM ST

RESTRAINT SYSTEM RS

BODY & TRIM BT

HEATER & AIR CONDITIONER HA

STARTING & CHARGING SYSTEMS SC

ELECTRICAL SYSTEM EL

ALPHABETICAL INDEX IDX

AUTOMATIC TRANSAXLE

CONTENTS

EURO-OBD

TROUBLE DIAGNOSIS - INDEX ....................................5

Alphabetical & P No. Index for DTC ...........................5

PRECAUTIONS ...............................................................7

Supplemental Restraint System (SRS) ″AIR

BAG″ and ″SEAT BELT PRE-TENSIONER″...............7

Precautions for On Board Diagnostic (EURO-

OBD) System of A/T and Engine - EURO-OBD -.......7

Precautions..................................................................7

Service Notice or Precautions.....................................9

Wiring Diagrams and Trouble Diagnosis...................10

PREPARATION .............................................................11

Special Service Tools ................................................11

Commercial Service Tools.........................................13

OVERALL SYSTEM ......................................................15

A/T Electrical Parts Location .....................................15

Circuit Diagram..........................................................16

Cross-sectional View .................................................17

Hydraulic Control Circuit............................................18

Shift Mechanism ........................................................19

Control System ..........................................................28

Control Mechanism....................................................30

Control Valve .............................................................34

EURO-OBD

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION...............................................................36

Introduction................................................................36

EURO-OBD Function for A/T System .......................36

One or Two Trip Detection Logic of EURO-OBD......36

EURO-OBD Diagnostic Trouble Code (DTC)............36

Malfunction Indicator (MI)..........................................40

CONSULT-II...............................................................40

Diagnostic Procedure Without CONSULT-II..............49

SECTION

EXCEPT FOR EURO-OBD

ON BOARD DIAGNOSTIC SYSTEM............................56

CONSULT-II...............................................................56

Diagnostic Procedure Without CONSULT-II..............61

EURO-OBD

TROUBLE DIAGNOSIS - INTRODUCTION..................68

Introduction................................................................68

Work Flow..................................................................72

EXCEPT FOR EURO-OBD

TROUBLE DIAGNOSIS -...............................................74

Introduction................................................................74

Work Flow..................................................................77

TROUBLE DIAGNOSIS - BASIC INSPECTION...........79

A/T Fluid Check.........................................................79

Stall Test ....................................................................79

Line Pressure Test.....................................................83

Road Test...................................................................84

TROUBLE DIAGNOSIS - GENERAL

DESCRIPTION.............................................................103

Symptom Chart........................................................103

TCM Terminals and Reference Value......................115

TROUBLE DIAGNOSIS FOR POWER SUPPLY........120

Wiring Diagram - AT - MAIN....................................120

Diagnostic Procedure ..............................................121

EURO-OBD

DTC P0705 PARK/NEUTRAL POSITION SWITCH ...123

Description...............................................................123

On Board Diagnosis Logic.......................................123

Possible Cause........................................................124

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................124

AT

CONTENTS (Cont’d)

Wiring Diagram - AT - PNP/SW...............................125

Diagnostic Procedure ..............................................126

DTC P0710 A/T FLUID TEMPERATURE SENSOR

CIRCUIT.......................................................................129

Description...............................................................129

On Board Diagnosis Logic.......................................129

Possible Cause........................................................130

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................130

Wiring Diagram - AT - FTS......................................131

Diagnostic Procedure ..............................................132

DTC P0720 VEHICLE SPEED SENSOR.A/T..............135

Description...............................................................135

On Board Diagnosis Logic.......................................135

Possible Cause........................................................135

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................136

Wiring Diagram - AT - VSSA/T................................137

Diagnostic Procedure ..............................................138

DTC P0725 ENGINE SPEED SIGNAL .......................140

Description...............................................................140

On Board Diagnosis Logic.......................................140

Possible Cause........................................................140

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................141

Wiring Diagram - AT - ENGSS................................142

Diagnostic Procedure ..............................................143

DTC P0731 A/T 1ST GEAR FUNCTION ....................145

Description...............................................................145

On Board Diagnosis Logic.......................................145

Possible Cause........................................................146

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................146

Wiring Diagram - AT - 1ST......................................148

Diagnostic Procedure ..............................................149

DTC P0732 A/T 2ND GEAR FUNCTION....................151

Description...............................................................151

On Board Diagnosis Logic.......................................151

Possible Cause........................................................152

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................152

Wiring Diagram - AT - 2ND......................................154

Diagnostic Procedure ..............................................155

DTC P0733 A/T 3RD GEAR FUNCTION....................157

Description...............................................................157

On Board Diagnosis Logic.......................................157

Possible Cause........................................................158

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................158

Wiring Diagram - AT - 3RD......................................160

Diagnostic Procedure ..............................................161

DTC P0734 A/T 4TH GEAR FUNCTION ....................163

Description...............................................................163

On Board Diagnosis Logic.......................................164

Possible Cause........................................................164

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................165

Wiring Diagram - AT - 4TH......................................167

Diagnostic Procedure ..............................................168

DTC P0740 TORQUE CONVERTER CLUTCH ..........172

Description...............................................................172

On Board Diagnosis Logic.......................................172

Possible Cause........................................................172

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................173

Wiring Diagram - AT - TCV......................................174

Diagnostic Procedure ..............................................175

DTC P0745 LINE PRESSURE SOLENOID VALVE...177

Description...............................................................177

On Board Diagnosis Logic.......................................177

Possible Cause........................................................178

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................178

Wiring Diagram - AT - LPSV....................................179

Diagnostic Procedure ..............................................180

DTC P0750 SHIFT SOLENOID VALVE A ..................183

Description...............................................................183

On Board Diagnosis Logic.......................................183

Possible Cause........................................................183

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................184

Wiring Diagram - AT - SSV/A..................................185

Diagnostic Procedure ..............................................186

DTC P0755 SHIFT SOLENOID VALVE B ..................188

Description...............................................................188

On Board Diagnosis Logic.......................................188

Possible Cause........................................................188

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................189

Wiring Diagram - AT - SSV/B..................................190

Diagnostic Procedure ..............................................191

DTC P1705 THROTTLE POSITION SENSOR ...........193

Description...............................................................193

On Board Diagnosis Logic.......................................194

Possible Cause........................................................194

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................195

Wiring Diagram - AT - TPS......................................196

Diagnostic Procedure ..............................................197

DTC P1760 OVERRUN CLUTCH SOLENOID

VALVE..........................................................................202

Description...............................................................202

On Board Diagnosis Logic.......................................202

Possible Cause........................................................202

AT-2

CONTENTS (Cont’d)

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................203

Wiring Diagram - AT - OVRCSV..............................204

Diagnostic Procedure ..............................................205

DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP

SENSOR CIRCUIT AND TCM POWER SOURCE)....207

Description...............................................................207

On Board Diagnosis Logic.......................................208

Possible Cause........................................................208

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................208

Wiring Diagram - AT - BA/FTS................................209

Diagnostic Procedure ..............................................210

DTC VEHICLE SPEED SENSOR.MTR.......................214

Description...............................................................214

On Board Diagnosis Logic.......................................214

Possible Cause........................................................214

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................215

Wiring Diagram - AT - VSSMTR..............................216

Diagnostic Procedure ..............................................217

EXCEPT FOR EURO-OBD

VEHICLE SPEED SENSOR.A/T..................................219

Description...............................................................219

Wiring Diagram - AT - VSSA/T................................221

Diagnostic Procedure ..............................................222

VEHICLE SPEED SENSOR.MTR................................224

Description...............................................................224

Wiring Diagram - AT - VSSMTR..............................226

Diagnostic Procedure ..............................................227

THROTTLE POSITION SENSOR................................229

Description...............................................................229

Wiring Diagram - AT - TPS......................................231

Diagnostic Procedure ..............................................232

SHIFT SOLENOID VALVE A ......................................237

Description...............................................................237

Wiring Diagram - AT - SSV/A..................................239

Diagnostic Procedure ..............................................240

SHIFT SOLENOID VALVE B ......................................242

Description...............................................................242

Wiring Diagram - AT - SSV/B..................................244

Diagnostic Procedure ..............................................245

OVERRUN CLUTCH SOLENOID VALVE...................247

Description...............................................................247

Wiring Diagram - AT - OVRCSV..............................249

Diagnostic Procedure ..............................................250

TORQUE CONVERTER CLUTCH SOLENOID

VALVE..........................................................................252

Description...............................................................252

Wiring Diagram - AT - TCV......................................254

Diagnostic Procedure ..............................................255

BATT/FLUID TEMP SEN (A/T FLUID TEMP

SENSOR CIRCUIT AND TCM POWER SOURCE)....257

Description...............................................................257

Wiring Diagram - AT - BA/FTS................................259

Diagnostic Procedure ..............................................260

ENGINE SPEED SIGNAL............................................264

Description...............................................................264

Wiring Diagram - AT - ENGSS................................265

Diagnostic Procedure ..............................................266

LINE PRESSURE SOLENOID VALVE.......................268

Description...............................................................268

Wiring Diagram - AT - LPSV....................................270

Diagnostic Procedure ..............................................271

CONTROL UNIT (RAM), CONTROL UNIT (ROM).....274

Description...............................................................274

Diagnostic Procedure ..............................................275

CONTROL UNIT (EEP ROM)......................................276

Description...............................................................276

Diagnostic Procedure ..............................................277

TROUBLE DIAGNOSES FOR SYMPTOMS...............278

Wiring Diagram - AT - NONDTC .............................278

1. S (SPORT) Indicator Lamp Does Not Come

On............................................................................282

2. S (SPORT) or

(SNOW) Indicator Lamp

Does Not Come On.................................................284

3. O/D OFF Indicator Lamp Does Not Come On....285

4. S (SPORT) Indicator Lamp Does Not Come

On............................................................................285

5. Engine Cannot Be Started In P and N Position..287

6. In P Position, Vehicle Moves Forward or

Backward When Pushed.........................................288

7. In N Position, Vehicle Moves ..............................289

8. Large Shock. N -> R Position .............................292

9. Vehicle Does Not Creep Backward In R

Position....................................................................294

10. Vehicle Does Not Creep Forward in D, 2 or 1

Position....................................................................298

11. Vehicle Cannot Be Started From D

12. A/T Does Not Shift: D
Kickdown: D

-> D2..................................................304

4

13. A/T Does Not Shift: D

14. A/T Does Not Shift: D

-> D2or Does Not

1

-> D3.............................307

2

-> D4.............................310

3

.................301

1

15. A/T Does Not Perform Lock-up.........................313

16. A/T Does Not Hold Lock-up Condition..............315

17. Lock-up Is Not Released...................................317

18. Engine Speed Does Not Return To Idle (Light
Braking D

19. Vehicle Does Not Start From D

20. A/T Does Not Shift: D

-> D3).....................................................318

4

.......................320

1

-> D3, When

4

Overdrive Control Switch ON -> OFF .....................321

AT-3

CONTENTS(Cont’d)

21.A/TDoesNotShift:D3->22,WhenSelector

LeverD->2Position..............................................322

22.A/TDoesNotShift:2

Lever2->1Position...............................................323

23.VehicleDoesNotDecelerateByEngine

Brake........................................................................324

24.TCMSelf-diagnosisDoesNotActivate(PNP,
OverdriveControl,A/TModeandThrottle

PositionSwitchesCircuitChecks)...........................324

A/TSHIFTLOCKSYSTEM.........................................337

Description...............................................................337

WiringDiagram-SHIFT-........................................338

ShiftLockSystemElectricalPartsLocation............339

DiagnosticProcedure..............................................339

KeyInterlockCable.................................................343

SHIFTCONTROLSYSTEM........................................345

ControlDevice.........................................................345

ControlCable...........................................................346

ON-VEHICLESERVICE..............................................347

ControlValveAssemblyandAccumulators.............347

RevolutionSensorReplacement.............................348

Park/NeutralPosition(PNP)SwitchAdjustment.....348

ControlCableAdjustment........................................349

DifferentialSideOilSealReplacement...................349

REMOVALANDINSTALLATION...............................350

Removal...................................................................350

Installation................................................................351

OVERHAUL.................................................................353

Components.............................................................353

OilChannel..............................................................356

LocationsofAdjustingShims,NeedleBearings,

ThrustWashersandSnapRings............................357

DISASSEMBLY............................................................358

REPAIRFORCOMPONENTPARTS.........................372

ManualShaft............................................................372

OilPump..................................................................375

ControlValveAssembly...........................................379

ControlValveUpperBody.......................................388

ControlValveLowerBody.......................................392

ReverseClutch........................................................394

->11,WhenSelector

2

HighClutch..............................................................397

ForwardandOverrunClutches...............................402

Low&ReverseBrake..............................................407

RearInternalGear,ForwardClutchHuband

OverrunClutchHub.................................................410

OutputShaft,IdlerGear,ReductionPinionGear

andBearingRetainer...............................................414

BandServoPistonAssembly..................................419

FinalDrive................................................................424

ASSEMBLY..................................................................430

Assembly(1)............................................................430

Adjustment(1).........................................................430

Assembly(2)............................................................435

Adjustment(2).........................................................441

Assembly(3)............................................................445

SERVICEDATAANDSPECIFICATIONS(SDS).......451

GeneralSpecifications.............................................451

ShiftSchedule..........................................................451

StallRevolution........................................................452

LinePressure...........................................................452

ControlValves..........................................................453

Accumulator.............................................................453

ClutchandBrakes...................................................454

FinalDrive................................................................456

PlanetaryCarrierandOilPump..............................458

InputShaft...............................................................458

ReductionPinionGear............................................458

BandServo..............................................................459

OutputShaft.............................................................459

BearingRetainer......................................................460

TotalEndPlay..........................................................460

ReverseClutchEndPlay........................................460

RemovalandInstallation.........................................461

ShiftSolenoidValves...............................................461

SolenoidValves.......................................................461

A/TFluidTemperatureSensor.................................461

RevolutionSensor...................................................461

DroppingResistor....................................................461

AT-4

TROUBLEDIAGNOSIS—INDEX

Alphabetical & P No. Index for DTC

EURO-OBD

Alphabetical&PNo.IndexforDTC

ALPHABETICALINDEXFORDTC

NFAT0001

NFAT0001S01

CheckifthevehicleisamodelwithEURO-OBDsystemornotbythe“Typeapprovalnumber”ontheidenti-

GI-40

ficationplate.Referto

Typeapprovalnumber Model
Available WithEURO-OBDsystem
Notavailable(blank) WithoutEURO-OBDsystem

(CONSULT-IIscreenterms)

A/T1STGRFNCTN P0731 AT-145
A/T2NDGRFNCTN P0732 AT-151
A/T3RDGRFNCTN P0733 AT-157
A/T4THGRFNCTN P0734 AT-163
ATFTEMPSEN/CIRC P0710 AT-129
ENGINESPEEDSIG P0725 AT-140
L/PRESSSOL/CIRC P0745 AT-177

, “IDENTIFICATION PLATE”.

Items

DTC

CONSULT-II

GST*1

Referencepage

O/RCLTCHSOL/CIRC P1760 AT-202
PNPSW/CIRC P0705 AT-123
SFTSOLA/CIRC*2 P0750 AT-183
SFTSOLB/CIRC*2 P0755 AT-188
TCCSOLENOID/CIRC P0740 AT-172
TPSEN/CIRCA/T*2 P1705 AT-193
VEHSPDSEN/CIRAT*3 P0720 AT-135

*1:ThesenumbersareprescribedbySAEJ2012.
*2:Whenthefail-safeoperationoccurs,theMIilluminates.
*3:TheMIilluminateswhenboththe“Revolutionsensorsignal”andthe“Vehiclespeedsensorsignal”meetthefail-safeconditionat

thesametime.

AT-5

TROUBLEDIAGNOSIS—INDEX

Alphabetical & P No. Index for DTC (Cont’d)

EURO-OBD

PNO.INDEXFORDTC

=NFAT0001S02

CheckifthevehicleisamodelwithEURO-OBDsystemornotbythe“Typeapprovalnumber”ontheidenti­ficationplate.Referto

Available WithEURO-OBDsystem
Notavailable(blank) WithoutEURO-OBDsystem

DTC

CONSULT-II

GST*1
P0705 PNPSW/CIRC AT-123
P0710 ATFTEMPSEN/CIRC AT-129
P0720 VEHSPDSEN/CIRAT*3 AT-135
P0725 ENGINESPEEDSIG AT-140
P0731 A/T1STGRFNCTN AT-145
P0732 A/T2NDGRFNCTN AT-151
P0733 A/T3RDGRFNCTN AT-157
P0734 A/T4THGRFNCTN AT-163

GI-40

, “IDENTIFICATION PLATE”.

Typeapprovalnumber Model

Items

(CONSULT-IIscreenterms)

Referencepage

P0740 TCCSOLENOID/CIRC AT-172
P0745 L/PRESSSOL/CIRC AT-177
P0750 SFTSOLA/CIRC*2 AT-183
P0755 SFTSOLB/CIRC*2 AT-188
P1705 TPSEN/CIRCA/T*2 AT-193
P1760 O/RCLTCHSOL/CIRC AT-202

*1:ThesenumbersareprescribedbySAEJ2012.
*2:Whenthefail-safeoperationoccurs,theMIilluminates.
*3:TheMIilluminateswhenboththe“Revolutionsensorsignal”andthe“Vehiclespeedsensorsignal”meetthefail-safeconditionat

thesametime.

AT-6

PRECAUTIONS

Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”

Supplemental Restraint System (SRS) “AIR
BAG” and “SEAT BELT PRE-TENSIONER”

The Supplemental Restraint System such as “AIR BAG” and “SEATBELTPRE-TENSIONER” used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to NISSAN MODEL A33 is as follows (The compo­sition varies according to the destination and optional equipment.):

+ For a frontal collision

The Supplemental Restraint System consists of driver air bag module (located in the center of the steer­ing wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.

+ For a side collision

The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring
harness, warning lamp (one of components of air bags for a frontal collision).

Information necessary to service the system safely is included in the RS section of this Service Manual.

WARNING:

+ To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death

in the event of a collision which would result in air bag inflation, all maintenance should be per­formed by an authorized NISSAN dealer.

+ Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-

sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the RS section.

+ Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.

NFAT0271

Precautions for On Board Diagnostic (EURO­OBD) System of A/T and Engine — EURO-OBD
—

The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.

CAUTION:

+ Be sure to turn the ignition switch OFF and disconnect the negative battery terminal before any

repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc.
will cause the MI to light up.

+ Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will

cause the MI to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)

+ Be sure to route and secure the harnesses properly after work. Interference of the harness with a

bracket, etc. may cause the MI to light up due to a short circuit.

+ Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube

may cause the MI to light up due to a malfunction of the EGR system or fuel injection system, etc.

+ Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM or

ECM before returning the vehicle to the customer.

Precautions

+ Before connecting or disconnecting the TCM harness

connector, turn ignition switch OFF and disconnect nega­tive battery terminal. Failure to do so may damage the
TCM. Because battery voltage is applied to TCM even if
ignition switch is turned OFF.

NFAT0003

NFAT0004

SEF289H

AT-7

Precautions (Cont’d)

PRECAUTIONS

+ When connecting or disconnecting pin connectors into or

from TCM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on TCM
pin terminal, when connecting pin connectors.

AAT470A

+ Before replacing TCM, perform TCM input/output signal

inspection and make sure whether TCM functions prop­erly or not. Refer to AT-116.

MEF040DA

SAT652J

+ After performing each TROUBLE DIAGNOSIS, perform

“DTC (Diagnostic Trouble Code) CONFIRMATION PROCE­DURE”.
The DTC should not be displayed in the “DTC CONFIRMA­TION PROCEDURE” if the repair is completed.

+ Before proceeding with disassembly, thoroughly clean the out-

side of the transaxle. It is important to prevent the internal parts
from becoming contaminated by dirt or other foreign matter.

+ Disassembly should be done in a clean work area.
+ Use lint-free cloth or towels for wiping parts clean. Common

shop rags can leave fibers that could interfere with the opera­tion of the transaxle.

+ Place disassembled parts in order for easier and proper

assembly.

+ All parts should be carefully cleaned with a general purpose,

non-flammable solvent before inspection or reassembly.

+ Gaskets, seals and O-rings should be replaced any time the

transaxle is disassembled.

+ It is very important to perform functional tests whenever they

are indicated.

+ The valve body contains precision parts and requires extreme

care when parts are removed and serviced. Place disas­sembled valve body parts in order for easier and proper
assembly. Care will also prevent springs and small parts from
becoming scattered or lost.

+ Properly installed valves, sleeves, plugs, etc. will slide along

bores in valve body under their own weight.

+ Before assembly, apply a coat of recommended ATF to all

AT-8

PRECAUTIONS

Precautions (Cont’d)

parts.ApplypetroleumjellytoprotectO-ringsandseals,or
holdbearingsandwashersinplaceduringassembly.Donot
usegrease.

+ ExtremecareshouldbetakentoavoiddamagetoO-rings,

sealsandgasketswhenassembling.

+ Afteroverhaul,refillthetransaxlewithnewATF.
+ WhentheA/Tdrainplugisremoved,onlysomeofthefluidis

drained.OldA/TfluidwillremainintorqueconverterandATF
coolingsystem.
Alwaysfollowtheproceduresunder
Fluid”whenchangingA/Tfluid.

MA-27

, “Changing A/T

ServiceNoticeorPrecautions

FAIL-SAFE

NFAT0005

NFAT0005S01

TheTCMhasanelectronicFail-Safe(limphomemode).Thisallowsthevehicletobedrivenevenifamajor
electricalinput/outputdevicecircuitisdamaged.
UnderFail-Safe,thevehiclealwaysrunsinthirdgear,evenwithashiftleverpositionof1,2orD.Thecus­tomermaycomplainofsluggishorpooracceleration.
WhentheignitionkeyisturnedONfollowingFail-Safeoperation,S(SPORT)indicatorlampblinksforabout
8seconds.Referto“TCMSelf-diagnosticProcedure(NOTOOLS)”,AT-49(EURO-OBD)or“SELF-DIAGNOS­TICPROCEDURE(WITHOUTCONSULT-II)”,AT-61(EXCEPTFOREURO-OBD).
Fail-Safemayoccurwithoutelectricalcircuitdamageifthevehicleisdrivenunderextremeconditions(such
asexcessivewheelspinfollowedbysuddenbraking).Torecovernormalshiftpattern,turntheignitionkey
OFFfor5seconds,thenON.
TheblinkingoftheS(SPORT)indicatorlampforabout8secondswillappearonlyonceandbecleared.The
customermayresumenormaldrivingconditions.
Alwaysfollowthe“WorkFlow”,refertoAT-72(EURO-OBD)orAT-77(EXCEPTFOREURO-OBD).
TheSELF-DIAGNOSISresultswillbeasfollows:

+ ThefirstSELF-DIAGNOSISwillindicatedamagetothevehiclespeedsensorortherevolutionsensor.
+ DuringthenextSELF-DIAGNOSIS,performedaftercheckingthesensor,nodamageswillbeindicated.

TORQUECONVERTERSERVICE

NFAT0005S02

Thetorqueconvertershouldbereplacedunderanyofthefollowingconditions:

+ Externalleaksinthehubweldarea.
+ Converterhubisscoredordamaged.
+ Converterpilotisbroken,damagedorfitspoorlyintocrankshaft.
+ Steelparticlesarefoundafterflushingthecoolerandcoolerlines.
+ Pumpisdamagedorsteelparticlesarefoundintheconverter.
+ VehiclehasTCCshudderand/ornoTCCapply.Replaceonlyafterallhydraulicandelectricaldiagnoses

havebeenmade.(Converterclutchmaterialmaybeglazed.)

+ Converteriscontaminatedwithenginecoolantcontainingantifreeze.
+ Internalfailureofstatorrollerclutch.
+ Heavyclutchdebrisduetooverheating(blueconverter).
+ Steelparticlesorclutchliningmaterialfoundinfluidfilteroronmagnetwhennointernalpartsinunitare

wornordamaged—indicatesthatliningmaterialcamefromconverter.
Thetorqueconvertershouldnotbereplacedif:

+ Thefluidhasanodor,isdiscolored,andthereisnoevidenceofmetalorclutchfacingparticles.
+ Thethreadsinoneormoreoftheconverterboltholesaredamaged.
+ Transaxlefailuredidnotdisplayevidenceofdamagedorworninternalparts,steelparticlesorclutchplate

liningmaterialinunitandinsidethefluidfilter.

+ Vehiclehasbeenexposedtohighmileage(only).Theexceptionmaybewherethetorqueconverterclutch

dampenerplatelininghasseenexcesswearbyvehiclesoperatedinheavyand/orconstanttraffic,such
astaxi,deliveryorpoliceuse.

EURO-OBD-IISELF-DIAGNOSIS—EURO-OBD—

NFAT0005S04

+ A/Tself-diagnosisisperformedbytheTCMincombinationwiththeECM.Theresultscanbereadthrough

theblinkingpatternoftheS(SPORT)indicatororthemalfunctionindicator(MI).RefertothetableonAT-41
fortheindicatorusedtodisplayeachself-diagnosticresult.

AT-9

PRECAUTIONS

Service Notice or Precautions (Cont’d)

+ Theself-diagnosticresultsindicatedbytheMIareautomaticallystoredinboththeECMandTCMmemo-

ries.

Alwaysperformtheprocedure“HOWTOERASEDTC”onAT-38tocompletetherepairandavoid
unnecessaryblinkingoftheMI.

+ Thefollowingself-diagnosticitemscanbedetectedusingECMself-diagnosticresultsmode*onlywhen

theS(SPORT)indicatorlampdoesnotindicateanymalfunctions.

− park/neutralposition(PNP)switch

− A/T1st,2nd,3rd,or4thgearfunction
*:FordetailsofEURO-OBD,referto

+ Certainsystemsandcomponents,especiallythoserelatedtoEURO-OBD,mayuseanewstyle

slide-lockingtypeharnessconnector.
Fordescriptionandhowtodisconnect,referto

EC-44

, “Introduction”.

EL-5

, “Description”.

WiringDiagramsandTroubleDiagnosis

Whenyoureadwiringdiagrams,refertothefollowing:

+

GI-11

, “HOW TO READ WIRING DIAGRAMS”

EL-9

+

Whenyouperformtroublediagnosis,refertothefollowing:

+
+

, “POWER SUPPLY ROUTING” for power distribution circuit

GI-33

, “HOW TO FOLLOW TEST GROUP IN TROUBLE DIAGNOSIS”

GI-22

, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”

NFAT0006

AT-10

PREPARATION

Special Service Tools

Tool number
Tool name

KV381054S0
Puller

ST33400001
Drift

ST2505S001
Oil pressure gauge set
1 ST25051001
Oil pressure gauge
2 ST25052000
Hose
3 ST25053000
Joint pipe
4 ST25054000
Adapter
5 ST25055000
Adapter

ST27180001
Puller

Description

NT414

NT086

NT097

Special Service Tools

+ Removing differential side oil seals
+ Removing differential side bearing outer race
+ Removing idler gear bearing outer race

a: 250 mm (9.84 in)
b: 160 mm (6.30 in)

+ Installing differential side oil seal

F04B and F04W (RH side)

+ Installing oil seal on oil pump housing

a: 60 mm (2.36 in) dia.
b: 47 mm (1.85 in) dia.

+ Measuring line pressure

+ Removing idler gear

a: 100 mm (3.94 in)
b: 110 mm (4.33 in)
c: M8 x 1.25P

NFAT0272

ST23540000
Pin punch

ST25710000
Pin punch

KV32101000
Pin punch

NT424

+ Removing and installing parking rod plate and

manual plate pins

a: 2.3 mm (0.091 in) dia.
b: 4 mm (0.16 in) dia.

NT442

+ Aligning groove of manual shaft and hole of

transmission case

a: 2 mm (0.08 in) dia.

NT410

+ Removing and installing manual shaft retaining

pin

+ Removing and installing pinion mate shaft lock

pin

a: 4 mm (0.16 in) dia.

NT410

AT-11

Special Service Tools (Cont’d)

PREPARATION

Tool number
Tool name

KV31102400
Clutch spring compres­sor

KV40100630
Drift

ST30720000
Bearing installer

ST35321000
Drift

Description

+ Removing and installing clutch return springs
+ Installing low and reverse brake piston

a: 320 mm (12.60 in)
b: 174 mm (6.85 in)

NT423

+ Installing reduction gear bearing inner race
+ Installing idler gear bearing inner race

a: 67.5 mm (2.657 in) dia.
b: 44 mm (1.73 in) dia.
c: 38.5 mm (1.516 in) dia.

NT107

+ Installing idler gear bearing outer race

a: 77 mm (3.03 in) dia.
b: 55.5 mm (2.185 in) dia.

NT115

+ Installing output shaft bearing

a: 49 mm (1.93 in) dia.
b: 41 mm (1.61 in) dia.

ST33230000
Drift

ST33220000
Drift

ST3306S001
Differential side bearing
puller set
1 ST33051001
Puller
2 ST33061000
Adapter

NT073

+ Installing differential side bearing inner race

F04B and F04W (RH side)

a: 51 mm (2.01 in) dia.
b: 28.5 mm (1.122 in) dia.

NT084

+ Selecting differential side bearing adjusting shim

(F04W)

a: 37 mm (1.46 in) dia.
b: 31 mm (1.22 in) dia.
c: 22 mm (0.87 in) dia.

NT085

+ Removing differential side bearing inner race

a: 38 mm (1.50 in) dia.
b: 28.5 mm (1.122 in) dia.
c: 130 mm (5.12 in)
d: 135 mm (5.31 in)
e: 100 mm (3.94 in)

AMT153

AT-12

PREPARATION

Special Service Tools (Cont’d)

Tool number
Tool name

ST3127S000
Preload gauge
1 GG91030000
Torque wrench
2 HT62940000
Socket adapter
3 HT62900000
Socket adapter

ST35271000
Drift

KV38107700
Preload adapter

ST30613000
Drift

Description

+ Checking differential side bearing preload

NT124

+ Installing idler gear
+ Installing differential side bearing inner race

F04W (LH side)

a: 72 mm (2.83 in) dia.
b: 63 mm (2.48 in) dia.

NT115

+ Selecting differential side bearing adjusting shim

(F04B)

+ Checking differential side bearing preload

(F04B)

NT087

+ Installing differential side bearing inner race

F04W (LH side)

a: 72 mm (2.83 in) dia.
b: 48 mm (1.89 in) dia.

NT073

KV38105210
Preload adapter

NT075

Tool name Description
Puller

NT077

Puller

NT411

Drift

+ Selecting differential side bearing adjusting shim

(F04W)

+ Checking differential side bearing preload

(F04W)

Commercial Service Tools

+ Removing idler gear bearing inner race
+ Removing and installing band servo piston snap

ring

+ Removing reduction gear bearing inner race

a: 60 mm (2.36 in) dia.
b: 35 mm (1.38 in) dia.

+ Installing differential side oil seal

F04W (LH side)

a: 90 mm (3.54 in) dia.

NFAT0273

NT083

AT-13

Commercial Service Tools (Cont’d)

Tool name Description

PREPARATION

Drift

Drift

Drift

Drift

+ Installing needle bearing on bearing retainer

a: 36 mm (1.42 in) dia.

NT083

+ Removing needle bearing from bearing retainer

a: 33.5 mm (1.319 in) dia.

NT083

+ Installing differential side bearing outer race

F04B and F04W (RH side)

a: 75 mm (2.95 in) dia.

NT083

+ Installing differential side bearing outer race

F04W (LH side)

a: 100 mm (3.94 in) dia.

NT083

AT-14

OVERALL SYSTEM

A/T Electrical Parts Location

A/T Electrical Parts Location

NFAT0274

AT-15

SAT114K

Circuit Diagram

OVERALL SYSTEM

Circuit Diagram

NFAT0275

AT-16

MAT902A

OVERALL SYSTEM

Cross-sectional View

Cross-sectional View

NFAT0276

1. Band servo piston

2. Reverse clutch drum

3. Converter housing

4. Oil pump

5. Brake band

6. Reverse clutch

7. High clutch

8. Front planetary gear

9. Low one-way clutch

10. Rear planetary gear

11. Forward clutch

12. Overrun clutch

13. Low & reverse brake

14. Output gear

AT-17

SAT577J

15. Idler gear

16. Forward one-way clutch

17. Pinion reduction gear

18. Final gear

19. Differential case

20. Input shaft

21. Torque converter

Hydraulic Control Circuit

OVERALL SYSTEM

Hydraulic Control Circuit

NFAT0277

AT-18

SAT578J

OVERALL SYSTEM

Shift Mechanism

CONSTRUCTION

1. Torque converter

2. Oil pump

3. Input shaft

4. Brake band

5. Reverse clutch

6. High clutch

7. Front sun gear

8. Front pinion gear

Shift Mechanism

9. Front internal gear

10. Front planetary carrier

11. Rear sun gear

12. Rear pinion gear

13. Rear internal gear

14. Rear planetary carrier

15. Forward clutch

16. Forward one-way clutch

NFAT0278

NFAT0278S01

SAT998I

17. Overrun clutch

18. Low one-way clutch

19. Low & reverse brake

20. Parking pawl

21. Parking gear

22. Output shaft

23. Idle gear

24. Output gear

FUNCTION OF CLUTCH AND BRAKE

Clutch and brake components Abbr. Function
Reverse clutch 5 R/C To transmit input power to front sun gear 7.
High clutch 6 H/C To transmit input power to front planetary carrier 10.
Forward clutch 15 F/C To connect front planetary carrier 10 with forward one-way

clutch 16.
Overrun clutch 17 O/C To connect front planetary carrier 10 with rear internal gear 13.
Brake band 4 B/B To lock front sun gear 7.
Forward one-way clutch 16 F/O.C When forward clutch 15 is engaged, to stop rear internal gear

13 from rotating in opposite direction against engine revolution.
Low one-way clutch 18 L/O.C To stop front planetary carrier 10 from rotating in opposite direc-

tion against engine revolution.
Low & reverse brake 19 L & R/B To lock front planetary carrier 10.

NFAT0278S02

AT-19

Shift Mechanism (Cont’d)

OVERALL SYSTEM

CLUTCH AND BAND CHART

For-

ward

one-

way

clutch

16

2nd

apply

Band servo

3rd

release

4th

apply

Shift posi-

tion

P

R j j

N

D*4

2

1

Reverse

clutch

1st j *1D B B

2nd j *1 A j B

3rd jj*1 A *2C C B *5j
4th j C *3C C jj
1st j DBB

2nd j A j B

1st jj B j

2nd jjj B

High

clutch

5

6

For-

ward

clutch

15

Over-

run

clutch

17

Low

one-

way

clutch

18

Low &

reverse

brake

19

NFAT0278S03

Lock-up Remarks

PARK POSI-

TION

REVERSE
POSITION

NEUTRAL
POSITION

Automatic

shift

1 ⇔ 2 ⇔ 3

⇔ 4

Automatic

shift

1 ⇔ 2 ⇐ 3
Locks (held

stationary) in

1st speed

1 ⇐ 2 ⇐ 3

*1: Operates when overdrive control switch is set in OFF position.
*2: Oil pressure is applied to both 2nd “apply” side and 3rd “release” side of band servo piston. However, brake band does not contract

because oil pressure area on the “release” side is greater than that on the “apply” side.
*3: Oil pressure is applied to 4th “apply” side in condition *2 above, and brake band contracts.
*4: A/T will not shift to 4th when overdrive control switch is set in OFF position.
*5: Operates when overdrive control switch is OFF.
j: Operates
A: Operates when throttle opening is less than 3/16, activating engine brake.
B: Operates during “progressive” acceleration.
C: Operates but does not affect power transmission.
D: Operates when throttle opening is less than 3/16, but does not affect engine brake.

AT-20

OVERALL SYSTEM

Shift Mechanism (Cont’d)

POWER TRANSMISSION
P and N Positions

+ P position

Similar to the N position, the clutches do not operate. The parking pawl engages with the parking gear to
mechanically hold the output shaft so that the power train is locked.

+ N position

Power from the input shaft is not transmitted to the output shaft because the clutches do not operate.

=NFAT0278S04

NFAT0278S0401

SAT991I

AT-21

Shift Mechanism (Cont’d)

OVERALL SYSTEM

11Position

+ Forward clutch
+ Forward one-way clutch
+ Overrun clutch
+ Low and reverse brake

Engine brake Overrun clutch always engages, therefore engine brake can be obtained when decelerat-

As overrun clutch engages, rear internal gear is locked by the operation of low and
reverse brake.
This is different from that of D

ing.

and 21.

1

=NFAT0278S0402

AT-22

AAT537A

OVERALL SYSTEM

Shift Mechanism (Cont’d)

D1and 21Positions

+ Forward one-way clutch
+ Forward clutch
+ Low one-way clutch

Overrun clutch

engagement conditions
(Engine brake)

=NFAT0278S0403

Rear internal gear is locked to rotate counterclockwise because of the functioning of
these three clutches.

D

: Overdrive control switch OFF and throttle opening is less than 3/16

1

2

: Always engaged

1

At D

and 21positions, engine brake is not activated due to free turning of low one-way

1

clutch.

AT-23

AAT532A

Shift Mechanism (Cont’d)

OVERALL SYSTEM

D2,22and 12Positions

+ Forward clutch
+ Forward one-way clutch
+ Brake band

Overrun clutch

engagement conditions

=NFAT0278S0404

Rear sun gear drives rear planetary carrier and combined front internal gear. Front inter­nal gear now rotates around front sun gear accompanying front planetary carrier.
As front planetary carrier transfers the power to rear internal gear through forward clutch
and forward one-way clutch, this rotation of rear internal gear increases the speed of rear
planetary carrier compared with that of the 1st speed.

D

: Overdrive control switch OFF and throttle opening is less than 3/16

2

2

and 12: Always engaged

2

AT-24

AAT533A

OVERALL SYSTEM

Shift Mechanism (Cont’d)

D3Position

+ High clutch
+ Forward clutch
+ Forward one-way clutch

Overrun clutch

engagement conditions

=NFAT0278S0405

Input power is transmitted to front planetary carrier through high clutch. And front plan­etary carrier is connected to rear internal gear by operation of forward clutch and forward
one-way clutch.
This rear internal gear rotation and another input (the rear sun gear) accompany rear
planetary carrier to turn at the same speed.

D

: Overdrive control switch “OFF” and throttle opening is less than 3/16

3

AT-25

AAT534A

Shift Mechanism (Cont’d)

OVERALL SYSTEM

D4(O/D) Position

+ High clutch
+ Brake band
+ Forward clutch (Does not affect

power transmission)

Engine brake At D

=NFAT0278S0406

Input power is transmitted to front carrier through high clutch.
This front carrier turns around the sun gear which is fixed by brake band and makes front
internal gear (output) turn faster.

position, there is no one-way clutch in the power transmission line and engine

4

brake can be obtained when decelerating.

AT-26

AAT536A

OVERALL SYSTEM

Shift Mechanism (Cont’d)

R Position

+ Reverse clutch
+ Low and reverse brake

Engine brake As there is no one-way clutch in the power transmission line, engine brake can be

Front planetary carrier is stationary because of the operation of low and reverse brake.
Input power is transmitted to front sun gear through reverse clutch, which drives front
internal gear in the opposite direction.

obtained when decelerating.

=NFAT0278S0407

AT-27

AAT535A

Control System

OVERALL SYSTEM

Control System

OUTLINE

=NFAT0279

NFAT0279S01

The automatic transaxle senses vehicle operating conditions through various sensors. It always controls the
optimum shift position and reduces shifting and lock-up shocks.

SENSORS

Park/neutral position (PNP)
switch
Throttle position sensor
Closed throttle position switch
Wide open throttle position
switch
Engine speed signal
A/T fluid temperature sensor
Revolution sensor
Vehicle speed sensor
Overdrive control switch
ASCD control unit
Stop lamp switch
A/T mode switch

CONTROL SYSTEM

Shift control
Line pressure control
Lock-up control

c

Overrun clutch control
Timing control
Fail-safe control
Self-diagnosis
CONSULT-II communication
line control
Duet-EA control

TCM

ACTUATORS

Shift solenoid valve A
Shift solenoid valve B
Overrun clutch solenoid valve

c

Torque converter clutch sole­noid valve
Line pressure solenoid valve
O/D OFF indicator lamp
S (SPORT) indicator lamp

(SNOW) indicator lamp

NFAT0279S02

AT-28

SAT115K

OVERALL SYSTEM

Control System (Cont’d)

TCM FUNCTION

The function of the TCM is to:

+ Receive input signals sent from various switches and sensors.
+ Determine required line pressure, shifting point, lock-up operation, and engine brake operation.
+ Send required output signals to the respective solenoids.

INPUT/OUTPUT SIGNAL OF TCM

Sensors and solenoid valves Function
Park/neutral position (PNP) switch Detects select lever position and sends a signal to TCM.
Throttle position sensor Detects throttle valve position and sends a signal to TCM.
Closed throttle position switch Detects throttle valve’s fully-closed position and sends a signal to TCM.

Detects a throttle valve position of greater than 1/2 of full throttle and sends
a signal to TCM.

Used as an auxiliary vehicle speed sensor. Sends a signal when revolution
sensor (installed on transmission) malfunctions.

Sends a signal, which prohibits a shift to D
TCM.

(overdrive) position, to the

4

Input

Wide open throttle position switch

Engine speed signal From ECM.
A/T fluid temperature sensor Detects transmission fluid temperature and sends a signal to TCM.
Revolution sensor Detects output shaft rpm and sends a signal to TCM.

Vehicle speed sensor

Overdrive control switch

=NFAT0279S03

NFAT0279S04

Output

A/T mode switch

ASCD control unit

Stop lamp switch Send the lock-up release signal to the TCM at time of D

Shift solenoid valve A/B

Line pressure solenoid valve

Torque converter clutch solenoid
valve

Overrun clutch solenoid valve

S (SPORT) indicator lamp Shows TCM faults, when A/T control components malfunction.

Detects S (SPORT),
signal to TCM.

Sends the cruise signal and D
control unit to TCM.

Selects shifting point suited to driving conditions in relation to a signal sent
from TCM.

Regulates (or decreases) line pressure suited to driving conditions in rela­tion to a signal sent from TCM.

Regulates (or decreases) lock-up pressure suited to driving conditions in
relation to a signal sent from TCM.

Controls an “engine brake” effect suited to driving conditions in relation to a
signal sent from TCM.

(SNOW) or AUTO position selected and sends a

(overdrive) cancellation signal from ASCD

4

(lock-up).

4

AT-29

Control Mechanism

OVERALL SYSTEM

SAT003J

Control Mechanism

LINE PRESSURE CONTROL

=NFAT0280

NFAT0280S01

TCM has various line pressure control characteristics to meet the
driving conditions.
An ON-OFF duty signal is sent to the line pressure solenoid valve
based on TCM characteristics.
Hydraulic pressure on the clutch and brake is electronically con­trolled through the line pressure solenoid valve to accommodate
engine torque. This results in smooth shift operation.

Normal Control

NFAT0280S0101

The line pressure to throttle opening characteristics is set for suit­able clutch operation.

Back-up Control (Engine brake)

NFAT0280S0102

If the selector lever is shifted to 2 position while driving in D4(O/D)

, great driving force is applied to the clutch inside the trans-

or D

3

mission. Clutch operating pressure (line pressure) must be
increased to deal with this driving force.

SAT004J

SAT005J

During Shift Change

NFAT0280S0103

The line pressure is temporarily reduced corresponding to a
change in engine torque when shifting gears (that is, when the shift
solenoid valve is switched for clutch operation) to reduce shifting
shock.

At Low Fluid Temperature

NFAT0280S0104

+ Fluid viscosity and frictional characteristics of the clutch facing

change with fluid temperature. Clutch engaging or band-con­tacting pressure is compensated for, according to fluid
temperature, to stabilize shifting quality.

AT-30

SAT006J

OVERALL SYSTEM

Control Mechanism (Cont’d)

+ The line pressure is reduced below 60°C (140°F) to prevent

shifting shock due to low viscosity of automatic transmission
fluid when temperature is low.

+ Line pressure is increased to a maximum irrespective of the

throttle opening when fluid temperature drops to −10°C (14°F).
This pressure rise is adopted to prevent a delay in clutch and
brake operation due to extreme drop of fluid viscosity at low
temperature.

SAT007J

SHIFT CONTROL

The shift is regulated entirely by electronic control to accommodate
vehicle speed and varying engine operations. This is accomplished
by electrical signals transmitted by the revolution sensor and
throttle position sensor. This results in improved acceleration per­formance and fuel economy.

Control of Shift Solenoid Valves A and B

The TCM activates shift solenoid valves A and B according to sig­nals from the throttle position sensor and revolution sensor to
select the optimum gear position on the basis of the shift schedule
memorized in the TCM.
The shift solenoid valve performs simple ON-OFF operation. When
set to ON, the drain circuit closes and pilot pressure is applied to
the shift valve.

SAT008J

Relation between shift solenoid valves A and B and gear positions

NFAT0280S02

NFAT0280S0201

Shift solenoid valve

A ON (Closed) OFF (Open) OFF (Open) ON (Closed) ON (Closed)
B ON (Closed) ON (Closed) OFF (Open) OFF (Open) ON (Closed)

D

1,21,11

D2,22,1

AT-31

Gear position

2

D

3

D4(O/D) N-P

Control Mechanism (Cont’d)

OVERALL SYSTEM

Control of Shift Valves A and B

NFAT0280S0202

SAT009J

Pilot pressure generated by the operation of shift solenoid valves
A and B is applied to the end face of shift valves A and B.
The drawing above shows the operation of shift valve B. When the
shift solenoid valve is ON, pilot pressure applied to the end face of
the shift valve overcomes spring force, moving the valve upward.

LOCK-UP CONTROL

NFAT0280S03

The torque converter clutch piston in the torque converter is locked
to eliminate torque converter slip to increase power transmission
efficiency. The solenoid valve is controlled by an ON-OFF duty
signal sent from the TCM. The signal is converted to an oil pres­sure signal which controls the lock-up piston.

Conditions for Lock-up Operation

NFAT0280S0301

When vehicle is driven in 4th gear position, vehicle speed and
throttle opening are detected. If the detected values fall within the
lock-up zone memorized in the TCM, lock-up is performed.

Overdrive control switch ON OFF
Selector lever D position
Gear position D
Vehicle speed sensor More than set value
Throttle position sensor Less than set opening
Closed throttle position switch OFF
A/T fluid temperature sensor More than 40°C (104°F)

4

Torque Converter Clutch Solenoid Valve Control

D

3

NFAT0280S0302

The torque converter clutch solenoid valve is controlled by the
TCM. The plunger closes the drain circuit during the OFF period,
and opens the circuit during the ON period. If the percentage of
OFF-time increases in one cycle, the pilot pressure drain time is
reduced and pilot pressure remains high.
The torque converter clutch piston is designed to slip to adjust the
ratio of ON-OFF, thereby reducing lock-up shock.

SAT010J

AT-32

SAT011J

OVERALL SYSTEM

Control Mechanism (Cont’d)

OFF-time INCREASING

↓

Amount of drain DECREASING

↓

Pilot pressure HIGH

↓

Lock-up RELEASING

Torque Converter Clutch Control Valve Operation

NFAT0280S0303

AAT155A

Lock-up released

The OFF-duration of the torque converter clutch solenoid valve is
long, and pilot pressure is high. The pilot pressure pushes the end
face of the torque converter clutch control valve in combination with
spring force to move the valve to the left. As a result, converter
pressure is applied to chamber A (torque converter clutch piston
release side). Accordingly, the torque converter clutch piston
remains unlocked.

Lock-up applied

When the OFF-duration of the torque converter clutch solenoid
valve is short, pilot pressure drains and becomes low. Accordingly,
the control valve moves to the right by the pilot pressure of the
other circuit and converter pressure. As a result, converter pres­sure is applied to chamber B, keeping the torque converter clutch
piston applied.
Also smooth lock-up is provided by transient application and
release of the lock-up.

OVERRUN CLUTCH CONTROL (ENGINE BRAKE
CONTROL)

Forward one-way clutch is used to reduce shifting shocks in down­shifting operations. This clutch transmits engine torque to the
wheels. However, drive force from the wheels is not transmitted to
the engine because the one-way clutch rotates idle. This means the
engine brake is not effective.
The overrun clutch operates when the engine brake is needed.

NFAT0280S04

Overrun Clutch Operating Conditions

D position D
2 position 2
1 position 1

Gear position Throttle opening

1,D2,D3

gear position

gear position

1,22

gear position At any position

1,12

Less than 3/16

AT-33

NFAT0280S0401

Control Mechanism (Cont’d)

OVERALL SYSTEM

SAT014J

SAT015J

Overrun Clutch Solenoid Valve Control

NFAT0280S0402

The overrun clutch solenoid valve is operated by an ON-OFF sig­nal transmitted by the TCM to provide overrun clutch control
(engine brake control).
When this solenoid valve is ON, the pilot pressure drain port
closes. When it is OFF, the drain port opens.
During the solenoid valve ON pilot pressure is applied to the end
face of the overrun clutch control valve.

Overrun Clutch Control Valve Operation

NFAT0280S0403

When the solenoid valve is ON, pilot pressure is applied to the
overrun clutch control valve. This pushes up the overrun clutch
control valve. The line pressure is then shut off so that the clutch
does not engage.
When the solenoid valve is OFF, pilot pressure is not generated.
At this point, the overrun clutch control valve moves downward by
spring force. As a result, overrun clutch operation pressure is pro­vided by the overrun clutch reducing valve. This causes the over­run clutch to engage.
In the 1 position, the overrun clutch control valve remains pushed
down so that the overrun clutch is engaged at all times.

SAT016J

Control Valve

FUNCTION OF CONTROL VALVES

Valve name Function

Pressure regulator valve, plug and sleeve
plug

Pressure modifier valve and sleeve Used as a signal supplementary valve to the pressure regulator valve. Regulates

Regulates oil discharged from the oil pump to provide optimum line pressure for all
driving conditions.

pressure-modifier pressure (signal pressure) which controls optimum line pressure for
all driving conditions.

AT-34

NFAT0281

NFAT0281S01

OVERALL SYSTEM

Control Valve (Cont’d)

Valve name Function

Pilot valve Regulates line pressure to maintain a constant pilot pressure level which controls

lock-up mechanism, overrun clutch, shift timing.
Accumulator control valve Regulates accumulator back-pressure to pressure suited to driving conditions.
Manual valve Directs line pressure to oil circuits corresponding to select positions.

Hydraulic pressure drains when the shift lever is in Neutral.
Shift valve A Simultaneously switches three oil circuits using output pressure of shift solenoid valve

A to meet driving conditions (vehicle speed, throttle opening, etc.).

Provides automatic downshifting and up-shifting (1st → 2nd → 3rd → 4th gears/4th →

3rd → 2nd → 1st gears) in combination with shift valve B.
Shift valve B Simultaneously switches two oil circuits using output pressure of shift solenoid valve B

in relation to driving conditions (vehicle speed, throttle opening, etc.).

Provides automatic downshifting and up-shifting (1st → 2nd → 3rd → 4th gears/4th →

3rd → 2nd → 1st gears) in combination with shift valve A.
Overrun clutch control valve Switches hydraulic circuits to prevent engagement of the overrun clutch simulta-

neously with application of the brake band in D

clutch engages during D
“1” reducing valve Reduces low & reverse brake pressure to dampen engine-brake shock when down-

shifting from the 1 position 1
Overrun clutch reducing valve Reduces oil pressure directed to the overrun clutch and prevents engine-brake shock.

In 1 and 2 positions, line pressure acts on the overrun clutch reducing valve to

increase the pressure-regulating point, with resultant engine brake capability.

.)

4

to 11.

2

. (Interlocking occurs if the overrun

4

Torque converter relief valve Prevents an excessive rise in torque converter pressure.
Torque converter clutch control valve,

plug and sleeve

1-2 accumulator valve and piston Dampens the shock encountered when 2nd gear band servo contracts, and provides

3-2 timing valve Switches the pace that oil pressure is released depending on vehicle speed; maxi-

Shuttle valve Determines if the overrun clutch solenoid valve should control the 3-2 timing valve or

Cooler check valve At low speeds and with a small load when little heat is generated, saves the volume

Activates or inactivates the lock-up function.

Also provides smooth lock-up through transient application and release of the lock-up

system.

smooth shifting.

mizes the high clutch release timing, and allows for soft down shifting.

the overrun clutch control valve and switches between the two.

of cooler flow, and stores the oil pressure for lock up.

AT-35

Introduction

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

EURO-OBD

Introduction

NFAT0017

The A/T system has two self-diagnostic systems.
The first is the emission-related on board diagnostic system (EURO-OBD) performed by the TCM (transmis­sion control module) in combination with the ECM. The malfunction is indicated by the MI (malfunction indi­cator) and is stored as a DTC in the ECM memory but not the TCM memory.
The second is the TCM original self-diagnosis indicated by the O/D OFF indicator lamp. The malfunction is
stored in the TCM memory. The detected items are overlapped with EURO-OBD self-diagnostic items. For
detail, refer to AT-41.

EURO-OBD Function for A/T System

NFAT0018

The ECM provides emission-related on board diagnostic (EURO-OBD) functions for the A/T system. One
function is to receive a signal from the TCM used with OBD-related parts of the A/T system. The signal is sent
to the ECM when a malfunction occurs in the corresponding EURO-OBD-related part. The other function is to
indicate a diagnostic result by means of the MI (malfunction indicator) on the instrument panel. Sensors,
switches and solenoid valves are used as sensing elements.
The MI automatically illuminates in One or Two Trip Detection Logic when a malfunction is sensed in relation
to A/T system parts.

One or Two Trip Detection Logic of EURO-OBD

ONE TRIP DETECTION LOGIC

NFAT0019

NFAT0019S01

If a malfunction is sensed during the first test drive, the MI will illuminate and the malfunction will be stored
in the ECM memory as a DTC. The TCM is not provided with such a memory function.

TWO TRIP DETECTION LOGIC

NFAT0019S02

When a malfunction is sensed during the first test drive, it is stored in the ECM memory as a 1st trip DTC
(diagnostic trouble code) or 1st trip freeze frame data. At this point, the MI will not illuminate. — First Trip
If the same malfunction as that experienced during the first test drive is sensed during the second test drive,
the MI will illuminate. — Second Trip
A/T-related parts for which the MI illuminates during the first or second test drive are listed below.

Items

One trip detection Two trip detection
Shift solenoid valve A — DTC: P0750 X
Shift solenoid valve B — DTC: P0755 X
Throttle position sensor or switch — DTC: P1705 X
Except above X

MI

The “trip” in the “One or Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed
during vehicle operation.

EURO-OBD Diagnostic Trouble Code (DTC)

HOW TO READ DTC AND 1ST TRIP DTC

NFAT0020

NFAT0020S01

DTC and 1st trip DTC can be read by the following methods.

(

With CONSULT-II or GST) CONSULT-II or GST (Generic Scan Tool) Examples: P0705, P0710, P0720,

P0725, etc.
These DTCs are prescribed by SAE J2012.
(CONSULT-II also displays the malfunctioning component or system.)

+ 1st trip DTC No. is the same as DTC No.
+ Output of the diagnostic trouble code indicates that the indicated circuit has a malfunction.

However, in case of the Mode II and GST they do not indicate whether the malfunction is still
occurring or occurred in the past and returned to normal.
CONSULT-II can identify them as shown below. Therefore, using CONSULT-II (if available) is rec­ommended.

A sample of CONSULT-II display for DTC and 1st trip DTC is shown on the next page. DTC or 1st trip DTC
of a malfunction is displayed in “SELF-DIAG RESULTS” mode for “ENGINE” with CONSULT-II. Time data
indicates how many times the vehicle was driven after the last detection of a DTC.

AT-36

ONBOARDDIAGNOSTICSYSTEMDESCRIPTION

SAT014K

IftheDTCisbeingdetectedcurrently,thetimedatawillbe“0”.

EURO-OBD

EURO-OBD Diagnostic Trouble Code (DTC) (Cont’d)

SAT015K

Ifa1sttripDTCisstoredintheECM,thetimedatawillbe“1t”.

SAT016K

FreezeFrameDataand1stTripFreezeFrameData

NFAT0020S0101

TheECMhasamemoryfunction,whichstoresthedrivingconditionsuchasfuelsystemstatus,calculated
loadvalue,enginecoolanttemperature,shorttermfueltrim,longtermfueltrim,enginespeedandvehicle
speedatthemomenttheECMdetectsamalfunction.
DatawhicharestoredintheECMmemory,alongwiththe1sttripDTC,arecalled1sttripfreezeframedata,
andthedata,storedtogetherwiththeDTCdata,arecalledfreezeframedataanddisplayedonCONSULT-II
orGST.The1sttripfreezeframedatacanonlybedisplayedontheCONSULT-IIscreen,notontheGST.For
detail,referto

EC-46

, “CONSULT-II”.
Onlyonesetoffreezeframedata(either1sttripfreezeframedataoffreezeframedata)canbestoredinthe
ECM.1sttripfreezeframedataisstoredintheECMmemoryalongwiththe1sttripDTC.Thereisnoprior­ityfor1sttripfreezeframedataanditisupdatedeachtimeadifferent1sttripDTCisdetected.However,once
freezeframedata(2ndtripdetection/MIon)isstoredintheECMmemory,1sttripfreezeframedataisno
longerstored.Remember,onlyonesetoffreezeframedatacanbestoredintheECM.TheECMhasthefol­lowingprioritiestoupdatethedata.

AT-37

ONBOARDDIAGNOSTICSYSTEMDESCRIPTION

EURO-OBD Diagnostic Trouble Code (DTC) (Cont’d)

Priority Items

1 Freezeframedata Misfire—DTC:P0300-P0306

FuelInjectionSystemFunction—DTC:P0171,P0172,P0174,P0175
2 Excepttheaboveitems(IncludesA/Trelateditems)
3 1sttripfreezeframedata

EURO-OBD

Both1sttripfreezeframedataandfreezeframedata(alongwiththeDTCs)areclearedwhentheECM
memoryiserased.

HOWTOERASEDTC

NFAT0020S02

ThediagnostictroublecodecanbeerasedbyCONSULT-II,GSTorECMDIAGNOSTICTESTMODEas
describedfollowing.

+ Ifthebatteryterminalisdisconnected,thediagnostictroublecodewillbelostwithin24hours.
+ WhenyouerasetheDTC,usingCONSULT-IIorGSTiseasierandquickerthanswitchingthemode

selectorontheECM.

Thefollowingemission-relateddiagnosticinformationisclearedfromtheECMmemorywhenerasingDTC
relatedtoEURO-OBD.Fordetails,referto

EC-45

, “Emission-related Diagnostic Information”.

+ Diagnostictroublecodes(DTC)
+ 1sttripdiagnostictroublecodes(1sttripDTC)
+ Freezeframedata
+ 1sttripfreezeframedata
+ Systemreadinesstest(SRT)codes
+ Testvalues

HOWTOERASEDTC(WITHCONSULT-II)

NFAT0020S03

+ IfaDTCisdisplayedforbothECMandTCM,itneedstobeerasedforbothECMandTCM.

1.IftheignitionswitchstaysONafterrepairwork,besuretoturnignitionswitchOFFonce.Waitatleast5
secondsandthenturnitON(enginestopped)again.

2.TurnCONSULT-II“ON”andtouch“A/T”.

3.Touch“SELF-DIAGRESULTS”.

4.Touch“ERASE”.(TheDTCintheTCMwillbeerased.)Thentouch“BACK”twice.

5.Touch“ENGINE”.

6.Touch“SELFDIAGNOSIS”.

7.Touch“ERASE”.(TheDTCintheECMwillbeerased.)

AT-38

ONBOARDDIAGNOSTICSYSTEMDESCRIPTION

EURO-OBD Diagnostic Trouble Code (DTC) (Cont’d)

EURO-OBD

SAT017K

HOWTOERASEDTC(WITHGST)

NFAT0020S04

1.IftheignitionswitchstaysONafterrepairwork,besuretoturnignitionswitchOFFonce.Waitatleast5
secondsandthenturnitON(enginestopped)again.

2.Perform“EURO-OBDSELF-DIAGNOSTICPROCEDURE(NOTOOLS)”.RefertoAT-49.(Theengine
warm-upstepcanbeskippedwhenperformingthediagnosisonlytoerasetheDTC.)

3.SelectMode4withGenericScanTool(GST).Fordetails,referto

HOWTOERASEDTC(NOTOOLS)

EC-86

, “DESCRIPTION”.

NFAT0020S05

1.IftheignitionswitchstaysONafterrepairwork,besuretoturnignitionswitchOFFonce.Waitatleast5
secondsandthenturnitON(enginestopped)again.

2.Perform“TCMSELF-DIAGNOSTICPROCEDURE(NOTOOLS)”.RefertoAT-49.(Theenginewarm-up
stepcanbeskippedwhenperformingthediagnosisonlytoerasetheDTC.)

AT-39

ONBOARDDIAGNOSTICSYSTEMDESCRIPTION

Malfunction Indicator (MI)

EURO-OBD

SAT652J

MalfunctionIndicator(MI)

=NFAT0021

1. TheMIwilllightupwhentheignitionswitchisturnedONwith­outtheenginerunning.Thisisforcheckingthelamp.

+ IftheMIdoesnotlightup,referto

(Orsee

EC-599

, “Wiring Diagram”.)

EL-145

, “Schematic”.

2. Whentheengineisstarted,themalfunctionindicatorshouldgo
off.
IftheMIremainson,theonboarddiagnosticsystemhas
detectedanenginesystemmalfunction.Fordetail,referto

EC-88

,“Introduction”.

CONSULT-II

NFAT0022

Afterperforming“SELF-DIAGNOSTICPROCEDURE(WITHCON­SULT-II)”(AT-40),placecheckmarksforresultsonthe“Diagnos­ticWorksheet”,AT-70.Referencepagesareprovidefollowingthe
items.

NOTICE:

1) TheCONSULT-IIelectricallydisplaysshifttimingandlock-up
timing(thatis,operationtimingofeachsolenoid).
Checkfortimedifferencebetweenactualshifttimingandthe
CONSULT-IIdisplay.Ifthedifferenceisnoticeable,mechani­calparts(exceptsolenoids,sensors,etc.)maybemalfunction­ing.Checkmechanicalpartsusingapplicablediagnosticpro­cedures.

2) Shiftschedule(whichimpliesgearposition)displayedon
CONSULT-IIandthatindicatedinServiceManualmaydiffer
slightly.Thisoccursbecauseofthefollowingreasons:

+ Actualshiftschedulehasmoreorlesstoleranceorallowance,
+ ShiftscheduleindicatedinServiceManualreferstothepoint

whereshiftsstart,and

+ GearpositiondisplayedonCONSULT-IIindicatesthepoint

whereshiftsarecompleted.

3) Shiftsolenoidvalve“A”or“B”isdisplayedonCONSULT-IIat
thestartofshifting.Gearpositionisdisplayeduponcompletion
ofshifting(whichiscomputedbyTCM).

4) AdditionalCONSULT-IIinformationcanbefoundintheOpera­tionManualsuppliedwiththeCONSULT-IIunit.

SAT014K

SELF-DIAGNOSTICPROCEDURE(WITHCONSULT-II)

NFAT0022S01

1. TurnonCONSULT-IIandtouch“ENGINE”forEURO-OBD
detecteditemsortouch“A/T”forTCMself-diagnosis.
IfA/Tisnotdisplayed,checkTCMpowersupplyandground
circuit.RefertoAT-120.IfresultisNG,referto

"Schematic".

AT-40

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

2. Touch “SELF DIAGNOSIS”.
Display shows malfunction experienced since the last erasing
operation.
CONSULT-II performs “Real Time Diagnosis”.
Also, any malfunction detected while in this mode will be dis­played at real time.

SAT987J

SELF-DIAGNOSTIC RESULT TEST MODE

EURO-OBD

CONSULT-II (Cont’d)

NFAT0022S02

Detected items
(Screen terms for CONSULT-II, “SELF­DIAG RESULTS” test mode)

“A/T” “ENGINE”

Park/neutral position (PNP) switch circuit

— PNP SW/CIRC

Revolution sensor

VHCL SPEED SEN·A/T

Vehicle speed sensor (Meter)
VHCL SPEED

SEN·MTR
A/T 1st gear function

—

A/T 2nd gear function

—

VEH SPD SEN/
CIR AT

—

A/T 1ST GR
FNCTN

A/T 2ND GR
FNCTN

Malfunction is detected when ...

+ TCM does not receive the cor-

rect voltage signal (based on the
gear position) from the switch.

+ TCM does not receive the

proper voltage signal from the
sensor.

+ TCM does not receive the

proper voltage signal from the
sensor.

+ A/T cannot be shifted to the 1st

gear position even if electrical
circuit is good.

+ A/T cannot be shifted to the 2nd

gear position even if electrical
circuit is good.

TCM self-diagnosis EURO-OBD (DTC)

Available by

S (SPORT)

indicator lamp or

“A/T” on CONSULT-II

— P0705

X P0720

X—

— P0731*1

— P0732*1

Available by

malfunction
indicator*2,

“ENGINE” on CON-

SULT-II or GST

A/T 3rd gear function

—

A/T 4th gear function

—

Shift solenoid valve A
SHIFT SOLENOID/V A SFT SOL A/CIRC
Shift solenoid valve B
SHIFT SOLENOID/V B SFT SOL B/CIRC
Overrun clutch solenoid valve

OVERRUN CLUTCH
S/V

A/T 3RD GR
FNCTN

A/T 4TH GR
FNCTN

O/R CLUCH SOL/
CIRC

+ A/T cannot be shifted to the 3rd

gear position even if electrical
circuit is good.

+ A/T cannot be shifted to the 4th

gear position even if electrical
circuit is good.

+ TCM detects an improper volt-

age drop when it tries to operate
the solenoid valve.

+ TCM detects an improper volt-

age drop when it tries to operate
the solenoid valve.

+ TCM detects an improper volt-

age drop when it tries to operate
the solenoid valve.

AT-41

— P0733*1

— P0734*1

X P0750

X P0755

X P1760

CONSULT-II (Cont’d)

ONBOARDDIAGNOSTICSYSTEMDESCRIPTION

EURO-OBD

Detecteditems
(ScreentermsforCONSULT-II,“SELF­DIAGRESULTS”testmode)

“A/T” “ENGINE”

T/Cclutchsolenoidvalve

T/CCLUTCHSOL/V

Linepressuresolenoidvalve

LINEPRESSURES/V

Throttlepositionsensor
Throttlepositionswitch

THROTTLEPOSISENTPSEN/CIRCA/T
Enginespeedsignal
ENGINESPEEDSIG
A/Tfluidtemperaturesensor
BATT/FLUIDTEMP

SEN

TCCSOLENOID/
CIRC

L/PRESSSOL/
CIRC

ATFTEMPSEN/
CIRC

Malfunctionisdetectedwhen...

+TCMdetectsanimpropervolt-

agedropwhenittriestooperate
thesolenoidvalve.

+TCMdetectsanimpropervolt-

agedropwhenittriestooperate
thesolenoidvalve.

+TCMreceivesanexcessively

loworhighvoltagefromthe
sensor.

+TCMdoesnotreceivethe

propervoltagesignalfromthe
ECM.

+TCMreceivesanexcessively

loworhighvoltagefromthe
sensor.

TCMself-diagnosis EURO-OBD(DTC)

Availableby

S(SPORT)

indicatorlampor

“A/T”onCONSULT-II

X P0740

X P0745

X P1705

X P0725

X P0710

Availableby

malfunction
indicator*2,

“ENGINE”onCON-

SULT-IIorGST

TCM(RAM)
CONTROLUNIT

(RAM)
TCM(ROM)
CONTROLUNIT

(ROM)
TCM(EEPROM)
CONTUNIT

(EEPROM)

Initialstart

INITIALSTART —

Nofailure
(NODTCISDETECTEDFURTHERTEST­INGMAYBEREQUIRED**)

X:Applicable

−:Notapplicable
*1:ThesemalfunctionscannotbedisplayedbyMI
*2:Referto

EC-61

, “DESCRIPTION”.

—

—

—

+TCMmemory(RAM)ismalfunc-

+TCMmemory(ROM)ismalfunc-

+TCMmemory(EEPROM)is

+Thisisnotamalfunctionmes-

+Nofailurehasbeendetected. X X

tioning

tioning

malfunctioning.

sage(Whenevershuttingoffa
powersupplytotheTCM,this
messageappearsonthe
screen.)

ifanothermalfunctionisassignedtoMI.

——

——

——

X—

AT-42

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

EURO-OBD

CONSULT-II (Cont’d)

Item Display

Vehicle speed sensor 1
(A/T)
(Revolution sensor)

Vehicle speed sensor 2
(Meter)

Throttle position sensor THRTL POS

A/T fluid temperature sen­sor

VHCL/S SE·A/T
[km/h] or [mph]

VHCL/S SE·MTR
[km/h] or [mph]

SEN
[V]

FLUID TEMP SE
[V]

DATA MONITOR MODE (A/T)

Monitor item

TCM
Input

signals

X—

X—

X—

X—

Main

signals

+ Vehicle speed computed

+ Vehicle speed computed

+ Throttle position sensor

+ A/T fluid temperature

+ Signal voltage lowers as

Description Remarks

from signal of revolution
sensor is displayed.

from signal of vehicle
speed sensor is dis­played.

signal voltage is dis­played.

sensor signal voltage is
displayed.

fluid temperature rises.

NFAT0022S11

When racing engine in N or
P with vehicle stationary,
CONSULT-II data may not
indicate 0 km/h (0 mph).

Vehicle speed display may
not be accurate under
approx. 10 km/h (6 mph). It
may not indicate 0 km/h (0
mph) when vehicle is sta­tionary.

Battery voltage BATTERY VOLT

[V]

Engine speed ENGINE SPEED

[rpm]

Overdrive control switch
A/T check switch

Park/neutral position (PNP)
switch

R position switch R POSITION SW

D position switch D POSITION SW

2 position switch 2 POSITION SW

OVERDRIVE SW
[ON/OFF] X —

PN POSI SW
[ON/OFF] X —

[ON/OFF] X —

[ON/OFF] X —

[ON/OFF]

X—

XX

X—

+ Source voltage of TCM

+ Engine speed, computed

+ ON/OFF state computed

+ ON/OFF state computed

+ ON/OFF state computed

+ ON/OFF state computed

+ ON/OFF status, com-

is displayed.

from engine speed
signal, is displayed.

from signal of overdrive
control SW is displayed.

from signal of PN posi­tion SW is displayed.

from signal of R position
SW is displayed.

from signal of D position
SW is displayed.

puted from signal of 2
position SW, is dis­played.

Engine speed display may
not be accurate under
approx. 800 rpm. It may not
indicate 0 rpm even when
engine is not running.

1 position switch 1 POSITION SW

[ON/OFF]

ASCD cruise signal ASCD-CRUISE

[ON/OFF]

+ ON/OFF status, com-

X—

+ Status of ASCD cruise

X—

AT-43

puted from signal of 1
position SW, is dis­played.

signal is displayed.
ON ... Cruising state
OFF ... Normal running
state

+ This is displayed even

when no ASCD is
mounted.

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Monitor item

EURO-OBD

Item Display

ASCD OD cut signal ASCD-OD CUT

[ON/OFF]

Kickdown switch KICKDOWN SW

[ON/OFF]

A/T mode switch
[S (SPORT)]

Closed throttle position
switch

Wide open throttle position
switch

POWER SHIFT
SW
[ON/OFF]

CLOSED
THL/SW
[ON/OFF]

W/O THRL/P-SW
[ON/OFF]

TCM
Input

signals

X—

X—

X—

X—

X—

Main

signals

Description Remarks

+ Status of ASCD OD

release signal is dis­played.
ON ... OD released
OFF ... OD not released

+ ON/OFF status, com-

puted from signal of
kickdown SW, is dis­played.

+ ON/OFF state computed

from signal of S
(SPORT) mode SW is
displayed.

+ ON/OFF status, com-

puted from signal of
closed throttle position
SW, is displayed.

+ ON/OFF status, com-

puted from signal of
wide open throttle posi­tion SW, is displayed.

+ This is displayed even

when no ASCD is
mounted.

+ This is displayed even

when no kickdown
switch is equipped.

A/T mode switch
[

(SNOW)]

Gear position GEAR

Selector lever position SLCT LVR POSI

Vehicle speed VEHICLE

Throttle position THROTTLE

Stop lamp switch BRAKE SW

HOLD SW
[ON/OFF]

SPEED
[km/h] or [mph]

POSI
[/8]

[ON/OFF]

+ ON/OFF state computed

X—

+ Gear position data used

—X

+ Selector lever position

—X

+ Vehicle speed data,

—X

+ Throttle position data,

—X

+ ON/OFF status is dis-

X—

from signal of

(SNOW) mode SW is

displayed.

for computation by TCM,
is displayed.

data, used for computa­tion by TCM, is dis­played.

used for computation by
TCM, is displayed.

used for computation by
TCM, is displayed.

played.
ON ... Brake pedal is
depressed.
OFF ... Brake pedal is
released.

+ A specific value used for

control is displayed if
fail-safe is activated due
to error.

+ A specific value used for

control is displayed if
fail-safe is activated due
to error.

Line pressure duty LINE PRES DTY

[%]

+ Control value of line

—X

AT-44

pressure solenoid valve,
computed by TCM from
each input signal, is dis­played.

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Monitor item

EURO-OBD

CONSULT-II (Cont’d)

Item Display

Torque converter clutch
solenoid valve duty

Shift solenoid valve A SHIFT S/V A

Shift solenoid valve B SHIFT S/V B

Overrun clutch solenoid
valve

Self-diagnosis display lamp
[S (SPORT) indicator lamp]

TCC S/V DUTY
[%]

[ON/OFF]

[ON/OFF]

OVERRUN/C
S/V
[ON/OFF] — X

SELF-D DP LMP
[ON/OFF] — X

TCM
Input

signals

—X

—X

—X

Main

signals

Description Remarks

+ Control value of torque

converter clutch solenoid
valve, computed by TCM
from each input signal, is
displayed.

+ Control value of shift

solenoid valve A, com­puted by TCM from each
input signal, is displayed.

+ Control value of shift

solenoid valve B, com­puted by TCM from each
input signal, is displayed.

+ Control value of overrun

clutch solenoid valve
computed by TCM from
each input signal is dis­played.

+ Control status of S

(SPORT) indicator lamp
is displayed.

Control value of solenoid is
displayed even if solenoid
circuit is disconnected.
The OFF signal is dis­played if solenoid circuit is
shorted.

X: Applicable
—: Not applicable

SAT585JA

DTC WORK SUPPORT MODE WITH CONSULT-II
CONSULT-II Setting Procedure

NFAT0022S04

NFAT0022S0401

1. Turn ignition switch OFF.

2. Connect CONSULT-II to data link connector, which is located
in left side dash panel.

SAT976J

AT-45

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

3. Turn ignition switch ON.

4. Touch “START”.

SAT586J

5. Touch “A/T”.

EURO-OBD

SAT014K

SAT971J

SAT018K

6. Touch “DTC WORK SUPPORT”.

7. Touch select item menu (1ST, 2ND, etc.).

8. Touch “START”.

SAT589J

AT-46

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

9. Perform driving test according to “DTC CONFIRMATION PRO­CEDURE” in “TROUBLE DIAGNOSIS FOR DTC”.

SAT019K

+ When testing conditions are satisfied, CONSULT-II screen

changes from “OUT OF CONDITION” to “TESTING”.

EURO-OBD

CONSULT-II (Cont’d)

SAT591J

SAT592J

SAT593J

10. Stop vehicle. If “NG” appears on the screen, malfunction may
exist. Go to “DIAGNOSTIC PROCEDURE”.

11. Perform test drive to check gear shift feeling in accordance
with instructions displayed.

SAT594J

AT-47

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

12. Touch “YES” or “NO”.

SAT595J

13. CONSULT-II procedure ended.
If “NG” appears on the screen, a malfunction may exist. Go to
“DIAGNOSTIC PROCEDURE”.

EURO-OBD

SAT596J

SAT593J

DTC WORK SUPPORT MODE

DTC work support item Description Check item

1ST GR FNCTN P0731

2ND GR FNCTN P0732

Following items for “A/T 1st gear function (P0731)” can be con­firmed.
+ Self-diagnosis status (whether the diagnosis is being con-

ducted or not)

+ Self-diagnosis result (OK or NG)
Following items for “A/T 2nd gear function (P0732)” can be con-

firmed.
+ Self-diagnosis status (whether the diagnosis is being con-

ducted or not)

+ Self-diagnosis result (OK or NG)

+ Shift solenoid valve A
+ Shift solenoid valve B
+ Each clutch
+ Hydraulic control circuit

+ Shift solenoid valve B
+ Each clutch
+ Hydraulic control circuit

NFAT0022S05

3RD GR FNCTN P0733

Following items for “A/T 3rd gear function (P0733)” can be con­firmed.
+ Self-diagnosis status (whether the diagnosis is being con-

ducted or not)

+ Self-diagnosis result (OK or NG)

AT-48

+ Shift solenoid valve A
+ Each clutch
+ Hydraulic control circuit

ONBOARDDIAGNOSTICSYSTEMDESCRIPTION

DTCworksupportitem Description Checkitem

EURO-OBD

CONSULT-II (Cont’d)

4THGRFNCTNP0734

Followingitemsfor“A/T4thgearfunction(P0734)”canbecon­firmed.
+Self-diagnosisstatus(whetherthediagnosisisbeingcon-

ductedornot)

+Self-diagnosisresult(OKorNG)

DiagnosticProcedureWithoutCONSULT-II

EURO-OBDSELF-DIAGNOSTICPROCEDURE(WITH

GST)

Referto

TOOLS)

Referto

Preparation

1. Turnignitionswitchto“OFF”position.

2. Connectthehandytypevacuumpumptothethrottleopener

3. Disconnectthethrottlepositionswitchharnessconnector.

4. Turnignitionswitchto“ON”position.

5. Checkcontinuityoftheclosedthrottlepositionswitch.

SAT491J

6. Goto“DIAGNOSISSTART”onnextpage.

EC-86

, “DESCRIPTION”.

EURO-OBDSELF-DIAGNOSTICPROCEDURE(NO

EC-61

, “DESCRIPTION”.

TCMSELF-DIAGNOSTICPROCEDURE(NOTOOLS)

andapplyvacuum–25.3kPa(–253mbar,–190mmHg,–7.48
inHg).

Continuityshouldexist.

(Ifcontinuitydoesnotexist,checkthrottleopenerand
closedthrottlepositionswitch.Thenincreasevacuum
untilclosedthrottlepositionswitchshowscontinuity.)

+ShiftsolenoidvalveA
+ShiftsolenoidvalveB
+Overrunclutchsolenoidvalve
+Linepressuresolenoidvalve
+Eachclutch
+Hydrauliccontrolcircuit

NFAT0023

NFAT0023S01

NFAT0023S02

NFAT0023S03

NFAT0023S0301

SAT636J

AT-49

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

1 CHECK S (SPORT) INDICATOR LAMP

1. Move selector lever to P position.
Start engine and warm it up to normal engine operating temperature.

2. Turn ignition switch to OFF position.

3. Wait 5 seconds.

4. Turn ignition switch to ON position.
(Do not start engine.)

5. Does S (SPORT) indicator lamp come on for about 2 seconds?

EURO-OBD

SAT163C

SAT116K

YesorNo

Yes © GO TO 2.
No © Stop procedure. Perform “1. S (SPORT) Indicator Lamp Does Not Come On”, AT-282

before proceeding.

AT-50

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

2 JUDGEMENT PROCEDURE STEP 1

1. Turn ignition switch to OFF position.

2. Set A/T mode switch to AUTO position.

3. Push and hold shift lock release button.

4. Move selector lever from P to D position.

5. Set overdrive control switch in OFF position.

6. Turn ignition switch to ON position.
(Do not start engine.)
(If O/D OFF indicator lamp comes off, refer to “Step 3 and 4” on AT-324).

7. Move selector lever to 2 position.

8. Set overdrive control switch in ON position.

EURO-OBD

Diagnostic Procedure Without CONSULT-II (Cont’d)

SAT653E

© GO TO 3.

SAT978F

AT-51

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

3 JUDGEMENT PROCEDURE STEP 2

1. Move selector lever to 1 position.

2. Set overdrive control switch in OFF position.

3. Depress accelerator pedal fully and release it.

EURO-OBD

SAT781B

© GO TO 4.

4 CHECK SELF-DIAGNOSIS CODE

Check S (SPORT) indicator lamp.
Refer to JUDGEMENT OF SELF-DIAGNOSIS CODE, AT-53.

© DIAGNOSIS END

SAT981F

SAT116K

AT-52

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

EURO-OBD

JUDGEMENT OF SELF-DIAGNOSIS CODE

S (SPORT) indicator lamp:

All judgement flickers are same.

All circuits that can be confirmed by self-diagnosis are OK.

2nd judgement flicker is longer than others.

SAT819H

NFAT0023S05

1st judgement flicker is longer than others.

SAT794H

Revolution sensor circuit is short-circuited or disconnected.

⇒ Go to DTC P0720 VEHICLE SPEED SENSOR·A/T (REVO­LUTION SENSOR), AT-135.

3rd judgement flicker is longer than others.

SAT795H

Vehicle speed sensor circuit is short-circuited or disconnected.

⇒ Go to DTC VEHICLE SPEED SENSOR·MTR, AT-214.

4th judgement flicker is longer than others.

SAT797H

Shift solenoid valve A circuit is short-circuited or disconnected.

⇒ Go to DTC P0750 SHIFT SOLENOID VALVE A, AT-183.

SAT796H

Throttle position sensor circuit is short-circuited or discon­nected.

⇒ Go to DTC P1705 THROTTLE POSITION SENSOR,
AT-193.

5th judgement flicker is longer than others.

SAT798H

Shift solenoid valve B circuit is short-circuited or disconnected.

⇒ Go to DTC P0755 SHIFT SOLENOID VALVE B, AT-188.

AT-53

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

EURO-OBD

S (SPORT) indicator lamp:

6th judgement flicker is longer than others.

SAT799H

Overrun clutch solenoid valve circuit is short-circuited or discon­nected.

⇒ Go to DTC P1760 OVERRUN CLUTCH SOLENOID VALVE,
AT-202.

8th judgement flicker is longer than others.

7th judgement flicker is longer than others.

SAT800H

Torque converter clutch solenoid valve circuit is short-circuited
or disconnected.

⇒ Go to DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE, AT-172.

9th judgement flicker is longer than others.

SAT801H

A/T fluid temperature sensor is disconnected or TCM power
source circuit is damaged.

⇒ Go to DTC BATT/FLUID TEMP SEN (A/T FLUID TEMPERA­TURE SENSOR AND TCM POWER SOURCE), AT-208.

10th judgement flicker is longer than others.

SAT803H

Line pressure solenoid valve circuit is short-circuited or discon­nected.

⇒ Go to DTC P0745 LINE PRESSURE SOLENOID VALVE,
AT-177.

SAT802H

Engine speed signal circuit is short-circuited or disconnected.

⇒ Go to DTC P0725 ENGINE SPEED SIGNAL, AT-140.

Flickers as shown below.

SAT804H

Battery power is low.
Battery has been disconnected for a long time.
Battery is connected conversely.
(When reconnecting TCM connectors. — This is not a prob­lem.)

AT-54

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

S (SPORT) indicator lamp:

Lamp comes off.

SAT809J

PNP switch, overdrive control switch, A/T check switch or throttle
position switch circuit is disconnected or TCM is damaged.

⇒ Go to 24. TCM Self-diagnosis Does Not Activate (PNP,
OVERDRIVE CONTROL, A/T MODE AND THROTTLE POSI­TION SWITCHES), AT-324.

t

= 2.5 seconds t2= 2.0 seconds t3= 1.0 second t4= 1.0 second

1

EURO-OBD

Diagnostic Procedure Without CONSULT-II (Cont’d)

AT-55

CONSULT-II

ONBOARDDIAGNOSTICSYSTEM

DESCRIPTION

EXCEPTFOREURO-OBD

CONSULT-II

NFAT0282

Afterperforming“SELF-DIAGNOSTICPROCEDURE(WITHCON­SULT-II)”(AT-56),placecheckmarksforresultsonthe“Diagnos­ticWorksheet”,AT-76.Referencepagesareprovidefollowingthe
items.

NOTICE:

1) TheCONSULT-IIelectricallydisplaysshifttimingandlock-up
timing(thatis,operationtimingofeachsolenoid).
Checkfortimedifferencebetweenactualshifttimingandthe
CONSULT-IIdisplay.Ifthedifferenceisnoticeable,mechani­calparts(exceptsolenoids,sensors,etc.)maybemalfunction­ing.Checkmechanicalpartsusingapplicablediagnosticpro­cedures.

2) Shiftschedule(whichimpliesgearposition)displayedon
CONSULT-IIandthatindicatedinServiceManualmaydiffer
slightly.Thisoccursbecauseofthefollowingreasons:

+ Actualshiftschedulehasmoreorlesstoleranceorallowance,
+ ShiftscheduleindicatedinServiceManualreferstothepoint

whereshiftsstart,and

+ GearpositiondisplayedonCONSULT-IIindicatesthepoint

whereshiftsarecompleted.

3) Shiftsolenoidvalve“A”or“B”isdisplayedonCONSULT-IIat
thestartofshifting.Gearpositionisdisplayeduponcompletion
ofshifting(whichiscomputedbyTCM).

4) AdditionalCONSULT-IIinformationcanbefoundintheOpera­tionManualsuppliedwiththeCONSULT-IIunit.

SAT580J

SAT970J

SELF-DIAGNOSTICPROCEDURE(WITHCONSULT-II)

NFAT0282S01

1. TurnonCONSULT-IIandtouch“A/T”forTCMself-diagnosis.
IfA/Tisnotdisplayed,checkTCMpowersupplyandground
circuit.RefertoAT-120.IfresultisNG,referto

EL-9

, “Sche-

matic”.

2. Touch“SELF-DIAGRESULTS”.
Displayshowsmalfunctionexperiencedsincethelasterasing
operation.
CONSULT-IIperforms“REALTIMEDIAG”.
Also,anymalfunctiondetectedwhileinthismodewillbedis­playedatrealtime.

AT-56

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION

EXCEPT FOR EURO-OBD

CONSULT-II (Cont’d)

SELF-DIAGNOSTIC RESULT TEST MODE

Detected items
(Screen terms for CONSULT-II, “SELF-DIAG
RESULTS” test mode)

Item Display

No failure
(NO DTC IS DETECTED FURTHER TESTING
MAY BE REQUIRED**)

Initial start + This is not a malfunction message (Whenever shut­INITIAL START
Revolution sensor VHCL SPEED

SEN·A/T

Vehicle speed sensor
(Meter)

Throttle position sensor
Throttle position switch

Shift solenoid valve A SHIFT SOLENOID/V A + TCM detects an improper voltage drop when it tries

Shift solenoid valve B SHIFT SOLENOID/V B + TCM detects an improper voltage drop when it tries

VHCL SPEED
SEN·MTR

THROTTLE POSI SEN + TCM receives an excessively low or high voltage

—

+ No failure has been detected.

ting off a power supply to the TCM, this message
appears on the screen.)

+ TCM does not receive the proper voltage signal

from the sensor.

+ TCM does not receive the proper voltage signal

from the sensor.

from the sensor.

to operate the solenoid valve.

to operate the solenoid valve.

Malfunction is detected when ... Remarks

NFAT0282S02

Overrun clutch sole­noid valve

T/C clutch solenoid
valve

A/T fluid temperature
sensor

Engine speed signal ENGINE SPEED SIG + TCM does not receive the proper voltage signal

Line pressure solenoid
valve

TCM (RAM) CONTROL UNIT

TCM (ROM) CONTROL UNIT

TCM (EEP ROM) CONT UNIT (EEP

OVERRUN CLUTCH
S/V

T/C CLUTCH SOL/V + TCM detects an improper voltage drop when it tries

BATT/FLUID TEMP
SEN

LINE PRESSURE S/V + TCM detects an improper voltage drop when it tries

(RAM)

(ROM)

ROM)

+ TCM detects an improper voltage drop when it tries

to operate the solenoid valve.

to operate the solenoid valve.

+ TCM receives an excessively low or high voltage

from the sensor.

from the ECM.

to operate the solenoid valve.

+ TCM memory (RAM) is malfunctioning.

+ TCM memory (ROM) is malfunctioning.

+ TCM memory (EEP ROM) is malfunctioning.

DATA MONITOR MODE (A/T)

Monitor item

Item Display

TCM Input

signals

Main

signals

Description Remarks

To be displayed in
case of abnormality
and when no recording
is made.

NFAT0282S03

Vehicle speed sensor 1
(A/T)
(Revolution sensor)

VHCL/S SE·A/T
[km/h] or [mph]

+ Vehicle speed computed

from signal of revolution

X—

sensor is displayed.

AT-57

When racing engine in N
or P with vehicle
stationary, CONSULT-II
data may not indicate 0
km/h (0 mph).

CONSULT-II (Cont’d)

Item Display

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION

Monitor item

TCM Input

signals

Main

signals

Description Remarks

EXCEPT FOR EURO-OBD

Vehicle speed sensor 2
(Meter)

Throttle position sensor THRTL POS SEN

A/T fluid temperature sen­sor

Battery voltage BATTERY VOLT

Engine speed ENGINE SPEED

Overdrive control switch OVERDRIVE SW

VHCL/S SE·MTR
[km/h] or [mph]

[V] X —

FLUID TEMP SE
[V]

[V]

[rpm]

[ON/OFF] X —

+ Vehicle speed computed

from signal of vehicle

X—

X—

X—

XX

speed sensor is dis­played.

+ Throttle position sensor

signal voltage is dis­played.

+ A/T fluid temperature

sensor signal voltage is
displayed.

+ Signal voltage lowers as

fluid temperature rises.

+ Source voltage of TCM

is displayed.

+ Engine speed, computed

from engine speed
signal, is displayed.

+ ON/OFF state computed

from signal of overdrive
control SW is displayed.

Vehicle speed display
may not be accurate
under approx. 10 km/h (6
mph). It may not indicate
0 km/h (0 mph) when
vehicle is stationary.

Engine speed display may
not be accurate under
approx. 800 rpm. It may
not indicate 0 rpm even
when engine is not run­ning.

Park/neutral position (PNP)
switch

R position switch R POSITION SW

D position switch D POSITION SW

2 position switch 2 POSITION SW

1 position switch 1 POSITION SW

ASCD cruise signal ASCD-CRUISE

ASCD OD cut signal ASCD-OD CUT

PN POSI SW
[ON/OFF] X —

[ON/OFF] X —

[ON/OFF] X —

[ON/OFF]

[ON/OFF]

[ON/OFF]

[ON/OFF]

+ ON/OFF state computed

from signal of PN posi­tion SW is displayed.

+ ON/OFF state computed

from signal of R position
SW is displayed.

+ ON/OFF state computed

from signal of D position
SW is displayed.

+ ON/OFF status, com-

X—

X—

X—

X—

puted from signal of 2
position SW, is dis­played.

+ ON/OFF status, com-

puted from signal of 1
position SW, is dis­played.

+ Status of ASCD cruise

signal is displayed.
ON ... Cruising state
OFF ... Normal running
state

+ Status of ASCD OD

release signal is dis­played.
ON ... OD released
OFF ... OD not released

+ This is displayed even

when no ASCD is
mounted.

+ This is displayed even

when no ASCD is
mounted.

AT-58

ON BOARD DIAGNOSTIC SYSTEM

Item Display

DESCRIPTION

Monitor item

TCM Input

signals

Main

signals

EXCEPT FOR EURO-OBD

CONSULT-II (Cont’d)

Description Remarks

Kickdown switch KICKDOWN SW

[ON/OFF] X —

A/T mode switch
[S (SPORT)]

Closed throttle position
switch

Wide open throttle position
switch

A/T mode switch
[

(SNOW)]

Gear position GEAR

Selector lever position SLCT LVR POSI

POWER SHIFT
SW
[ON/OFF]

CLOSED
THL/SW
[ON/OFF]

W/O THRL/P-SW
[ON/OFF]

HOLD SW
[ON/OFF]

+ ON/OFF status, com-

+ ON/OFF state computed

X—

+ ON/OFF status, com-

X—

+ ON/OFF status, com-

X—

+ ON/OFF state computed

X—

+ Gear position data used

—X

+ Selector lever position

—X

puted from signal of kick­down SW, is displayed.

from signal of S
(SPORT) mode SW is
displayed.

puted from signal of
closed throttle position
SW, is displayed.

puted from signal of wide
open throttle position
SW, is displayed.

from signal of

(SNOW) mode SW is

displayed.

for computation by TCM,
is displayed.

data, used for computa­tion by TCM, is dis­played.

+ This is displayed even

when no kickdown
switch is equipped.

+ A specific value used

for control is displayed
if fail-safe is activated
due to error.

Vehicle speed VEHICLE SPEED

[km/h] or [mph] — X

Throttle position THROTTLE POSI

[/8]

Stop lamp switch BRAKE SW

[ON/OFF]

Line pressure duty LINE PRES DTY

[%]

Torque converter clutch
solenoid valve duty

TCC S/V DUTY
[%]

+ Vehicle speed data, used

+ Throttle position data,

—X

+ ON/OFF status is dis-

X—

+ Control value of line

—X

+ Control value of torque

—X

for computation by TCM,
is displayed.

used for computation by
TCM, is displayed.

played.
ON ... Brake pedal is
depressed.
OFF ... Brake pedal is
released.

pressure solenoid valve,
computed by TCM from
each input signal, is dis­played.

converter clutch solenoid
valve, computed by TCM
from each input signal, is
displayed.

+ A specific value used

for control is displayed
if fail-safe is activated
due to error.

AT-59

CONSULT-II (Cont’d)

Item Display

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION

Monitor item

TCM Input

signals

Main

signals

Description Remarks

EXCEPT FOR EURO-OBD

Shift solenoid valve A SHIFT S/V A

[ON/OFF]

Shift solenoid valve B SHIFT S/V B

[ON/OFF]

Overrun clutch solenoid
valve

Self-diagnosis display lamp
[S (SPORT) indicator lamp]

X: Applicable
—: Not applicable

OVERRUN/C S/V
[ON/OFF]

SELF-D DP LMP
[ON/OFF] — X

+ Control value of shift

—X

+ Control value of shift

—X

+ Control value of overrun

—X

+ Control status of S

solenoid valve A, com­puted by TCM from each
input signal, is displayed.

solenoid valve B, com­puted by TCM from each
input signal, is displayed.

clutch solenoid valve
computed by TCM from
each input signal is dis­played.

(SPORT) indicator lamp
is displayed.

Control value of solenoid
is displayed even if sole­noid circuit is discon­nected.
The OFF signal is dis­played if solenoid circuit is
shorted.

HOW TO ERASE SELF-DIAGNOSTIC RESULTS

(WITH CONSULT-II)

1. If the ignition switch stays “ON” after repair work, be sure to
turn ignition switch “OFF” once. Wait for at least 5 seconds and
then turn it “ON” again.

2. Turn CONSULT-II “ON”, and touch “A/T”.

NFAT0282S04

SAT580J

SAT971J

SAT970J

3. Touch “SELF DIAG RESULTS”.

4. Touch “ERASE”. (The self-diagnostic results will be erased.)

AT-60

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION

Diagnostic Procedure Without CONSULT-II

EXCEPT FOR EURO-OBD

SAT491J

SAT962J

Diagnostic Procedure Without CONSULT-II

NFAT0283

SELF-DIAGNOSTIC PROCEDURE (WITHOUT

CONSULT-II)
Preparation

1. Turn ignition switch to “OFF” position.

2. Connect the handy type vacuum pump to the throttle opener
and apply vacuum –25.3 kPa (–253 mbar, –190 mmHg, –7.48
inHg).

3. Disconnect the throttle position switch harness connector.

4. Turn ignition switch to “ON” position.

5. Check continuity of the closed throttle position switch.

Continuity should exist.
(If continuity does not exist, check throttle opener and
closed throttle position switch. Then increase vacuum
until closed throttle position switch shows continuity.)

6. Go to “DIAGNOSIS START” on next page.

NFAT0283S01

NFAT0283S0101

AT-61

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

1 CHECK S (SPORT) INDICATOR LAMP

1. Move selector lever to P position.
Start engine and warm it up to normal engine operating temperature.

2. Turn ignition switch to OFF position.

3. Wait 5 seconds.

4. Turn ignition switch to ON position.
(Do not start engine.)

5. Does S (SPORT) indicator lamp come on for about 2 seconds?

EXCEPT FOR EURO-OBD

SAT163C

SAT116K

YesorNo

Yes © GO TO 2.
No © Stop procedure. Perform “1. S (SPORT), O/D OFF, A/T CHECK or POWER Indicator

Lamp Does Not Come On”, AT-282 before proceeding.

AT-62

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

2 JUDGEMENT PROCEDURE STEP 1

1. Turn ignition switch to OFF position.

2. Set A/T mode switch to AUTO position.

3. Push and hold shift lock release button.

4. Move selector lever from P to D position.

5. Turn ignition switch to ON position.
(Do not start engine.)

6. Set overdrive control switch in OFF position. (If O/D OFF indicator lamp comes off, refer to “Step 3 and 4” on AT-324).

7. Move selector lever to 2 position.

8. Set overdrive control switch in ON position.

EXCEPT FOR EURO-OBD

SAT653E

© GO TO 3.

SAT780B

AT-63

ON BOARD DIAGNOSTIC SYSTEM

Diagnostic Procedure Without CONSULT-II (Cont’d)

3 JUDGEMENT PROCEDURE STEP 2

1. Move selector lever to 1 position.

2. Set overdrive control switch in OFF position.

3. Depress accelerator pedal fully and release it.

DESCRIPTION

EXCEPT FOR EURO-OBD

SAT781B

© GO TO 4.

4 CHECK SELF-DIAGNOSIS CODE

Check S (SPORT) indicator lamp.
Refer to JUDGEMENT OF SELF-DIAGNOSIS CODE, AT-65.

© DIAGNOSIS END

SAT981F

SAT116K

AT-64

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

EXCEPT FOR EURO-OBD

JUDGEMENT OF SELF-DIAGNOSIS CODE

S (SPORT) indicator lamp:

All judgement flickers are same.

SAT819H

All circuits that can be confirmed by self-diagnosis are OK.

2nd judgement flicker is longer than others.

NFAT0283S02

1st judgement flicker is longer than others.

SAT794H

Revolution sensor circuit is short-circuited or disconnected.

⇒ Go to VEHICLE SPEED SENSOR·A/T (REVOLUTION
SENSOR), AT-219.

3rd judgement flicker is longer than others.

SAT795H

Vehicle speed sensor circuit is short-circuited or disconnected.

⇒ Go to VEHICLE SPEED SENSOR·MTR, AT-224.

4th judgement flicker is longer than others.

SAT797H

Shift solenoid valve A circuit is short-circuited or disconnected.

⇒ Go to SHIFT SOLENOID VALVE A, AT-237.

SAT796H

Throttle position sensor circuit is short-circuited or disconnected.

⇒ Go to THROTTLE POSITION SENSOR, AT-229.

5th judgement flicker is longer than others.

SAT798H

Shift solenoid valve B circuit is short-circuited or disconnected.

⇒ Go to SHIFT SOLENOID VALVE B, AT-242.

AT-65

ON BOARD DIAGNOSTIC SYSTEM

Diagnostic Procedure Without CONSULT-II (Cont’d)

DESCRIPTION

S (SPORT) indicator lamp:

EXCEPT FOR EURO-OBD

6th judgement flicker is longer than others.

SAT799H

Overrun clutch solenoid valve circuit is short-circuited or discon­nected.

⇒ Go to OVERRUN CLUTCH SOLENOID VALVE, AT-247.

8th judgement flicker is longer than others.

7th judgement flicker is longer than others.

SAT800H

Torque converter clutch solenoid valve circuit is short-circuited
or disconnected.

⇒ Go to TORQUE CONVERTER CLUTCH SOLENOID
VALVE, AT-252.

9th judgement flicker is longer than others.

SAT801H

A/T fluid temperature sensor is disconnected or TCM power
source circuit is damaged.

⇒ Go to A/T FLUID TEMPERATURE SENSOR AND TCM
POWER SOURCE, AT-257.

10th judgement flicker is longer than others.

SAT803H

Line pressure solenoid valve circuit is short-circuited or discon­nected.

⇒ Go to LINE PRESSURE SOLENOID VALVE, AT-268.

SAT802H

Engine speed signal circuit is short-circuited or disconnected.

⇒ Go to ENGINE SPEED SIGNAL, AT-264.

Flickers as shown below.

SAT804H

Battery power is low.
Battery has been disconnected for a long time.
Battery is connected conversely.
(When reconnecting TCM connectors. — This is not a problem.)

AT-66

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION

S (SPORT) indicator lamp:

Lamp comes off.

SAT809J

PNP switch, overdrive control switch, A/T check switch or
throttle position switch circuit is disconnected or TCM is dam­aged.

⇒ Go to 24. TCM Self-diagnosis Does Not Activate (PNP,
OVERDRIVE CONTROL, A/T MODE AND THROTTLE POSI­TION SWITCHES), AT-324.

t

= 2.5 seconds t2= 2.0 seconds t3= 1.0 second t4= 1.0 second

1

EXCEPT FOR EURO-OBD

Diagnostic Procedure Without CONSULT-II (Cont’d)

HOW TO ERASE SELF-DIAGNOSTIC RESULTS

(WITHOUT CONSULT-II)

1. If the ignition switch stays “ON” after repair work, be sure to
turn ignition switch “OFF” once. Wait for at least 5 seconds and
then turn it “ON” again.

2. Perform “SELF-DIAGNOSTIC PROCEDURE (WITHOUT
CONSULT-II)’’. Refer to AT-61.

3. Turn ignition switch “OFF”. (The self-diagnostic results will be
erased.)

NFAT0283S03

AT-67

TROUBLE DIAGNOSIS — INTRODUCTION

EURO-OBD

SAT631IA

SAT632I

Introduction

NFAT0024

The TCM receives a signal from the vehicle speed sensor, throttle
position sensor or park/neutral position (PNP) switch and provides
shift control or lock-up control via A/T solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used with the EURO-OBD-related
parts of the A/T system for malfunction-diagnostic purposes. The
TCM is capable of diagnosing malfunctioning parts while the ECM
can store malfunctions in its memory.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good
operating condition and be free of valve seizure, solenoid valve
malfunction, etc.
It is much more difficult to diagnose a problem that occurs intermit­tently rather than continuously. Most intermittent problems are
caused by poor electric connections or improper wiring. In this
case, careful checking of suspected circuits may help prevent the
replacement of good parts.
A visual check only, may not find the cause of the problems. A road
test with CONSULT-II (or GST) or a circuit tester connected should
be performed. Follow the “Work Flow”. Refer to AT-72.
Before undertaking actual checks, take a few minutes to talk with
a customer who approaches with a driveability complaint. The cus­tomer can supply good information about such problems, espe­cially intermittent ones. Find out what symptoms are present and
under what conditions they occur.A“DIAGNOSITC WORKSHEET”
like the example (AT-69) should be used.
Start your diagnosis by looking for “conventional” problems first.
This will help troubleshoot driveability problems on an electronically
controlled engine vehicle.

Also check related Service bulletins for information.

SEF234G

AT-68

TROUBLE DIAGNOSIS — INTRODUCTION

EURO-OBD

Introduction (Cont’d)

DIAGNOSTIC WORKSHEET
Information from Customer

KEY POINTS

WHAT ........ Vehicle & A/T model

WHEN ........ Date, Frequencies

WHERE ..... Road conditions

HOW .......... Operating conditions, Symptoms

Customer name MR/MS Model & Year VIN
Trans. model Engine Mileage
Incident Date Manuf. Date In Service Date
Frequency N Continuous N Intermittent ( times a day)
Symptoms N Vehicle does not move. (N Any position N Particular position)

N No up-shift (N 1st → 2nd N 2nd → 3rd N 3rd → O/D)
N No down-shift (N O/D → 3rd N 3rd → 2nd N 2nd → 1st)
N Lockup malfunction
N Shift point too high or too low.
N Shift shock or slip (N N → D N Lockup N Any drive position)
N Noise or vibration
N No kickdown

=NFAT0024S01

NFAT0024S0101

N No pattern select
N Others

()

S (SPORT) indicator lamp Blinks for about 8 seconds.

N Continuously lit N Not lit

Malfunction indicator (MI) N Continuously lit N Not lit

AT-69

Introduction (Cont’d)

TROUBLE DIAGNOSIS — INTRODUCTION

EURO-OBD

Diagnostic Worksheet

1. N Read the Fail-safe and listen to customer complaints. AT-9

2. N CHECK A/T FLUID AT-79

N Leakage (Follow specified procedure)
N Fluid condition
N Fluid level

3. N Perform STALL TEST and LINE PRESSURE TEST. AT-79, 83
N Stall test — Mark possible damaged components/others.

N Torque converter one-way clutch
N Reverse clutch
N Forward clutch
N Overrun clutch
N Forward one-way clutch

N Pressure test — Suspected parts:

4. N Perform all ROAD TEST and mark required procedures. AT-84

4-1. Check before engine is started. AT-85

N SELF-DIAGNOSTIC PROCEDURE - Mark detected items.

N Park/neutral position (PNP) switch, AT-123.
N A/T fluid temperature sensor, AT-129.
N Vehicle speed sensor·A/T (Revolution sensor), AT-135.
N Engine speed signal, AT-140.
N Torque converter clutch solenoid valve, AT-172.
N Line pressure solenoid valve, AT-177.
N Shift solenoid valve A, AT-183.
N Shift solenoid valve B, AT-188.
N Throttle position sensor, AT-193.
N Overrun clutch solenoid valve, AT-202.
N Park/neutral position (PNP), overdrive control, A/T mode and throttle position switches,

AT-324.

N A/T fluid temperature sensor and TCM power source, AT-207.
N Vehicle speed sensor·MTR, AT-214.
N Control unit (RAM), Control unit (ROM), AT-274.
N Control unit (EEP ROM), AT-276.
N Battery
N Others

N Low & reverse brake
N Low one-way clutch
N Engine
N Line pressure is low
N Clutches and brakes except high clutch and

brake band are OK

=NFAT0024S0102

4-2. Check at idle AT-86

N 1. S (SPORT) Indicator Lamp Does Not Come On, AT-282.
N 2. S (SPORT) or
N 3. O/D OFF Indicator Lamp Does Not Come On, AT-285.
N 4. S (SPORT) Indicator Lamp Does Not Come On, AT-285.
N 5. Engine Cannot Be Started In P and N Position, AT-287.
N 6. In P Position, Vehicle Moves Forward or Backward When Pushed, AT-288.
N 7. In N Position, Vehicle Moves, AT-289.
N 8. Large Shock. N → R Position, AT-292.
N 9. Vehicle Does Not Creep Backward In R Position, AT-294.
N 10. Vehicle Does Not Creep Forward In D, 2 or 1 Position, AT-298.

(SNOW) Indicator Lamp Does Not Come On, AT-284.

AT-70

TROUBLEDIAGNOSIS—INTRODUCTION

EURO-OBD

Introduction (Cont’d)

4. 4-3. Cruisetest AT-89
Part-1

AT-93

N11.VehicleCannotBeStartedFromD
N12.A/TDoesNotShift:D
N13.A/TDoesNotShift:D
N14.A/TDoesNotShift:D

→D2orDoesNotKickdown:D4→D2,AT-304.

1

→D3,AT-307.

2

→D4,AT-310.

3

,AT-301.

1

N15.A/TDoesNotPerformLock-up,AT-313.
N16.A/TDoesNotHoldLock-upCondition,AT-315.
N17.Lock-upIsNotReleased,AT-317.
N18.EngineSpeedDoesNotReturnToIdle(LightBrakingD

→D3),AT-318.

4

Part-2 AT-97

N19.VehicleDoesNotStartFromD
N12.A/TDoesNotShift:D
N13.A/TDoesNotShift:D
N14.A/TDoesNotShift:D

→D2orDoesNotKickdown:D4→D2,AT-304.

1

→D3,AT-307.

2

→D4,AT-310.

3

,AT-320.

1

Part-3 AT-99

N20.A/TDoesNotShift:D
N18.EngineSpeedDoesNotReturnToIdle(EngineBrakeInD
N21.A/TDoesNotShift:D
N18.EngineSpeedDoesNotReturnToIdle(EngineBrakeIn2
N22.A/TDoesNotShift:2

→D3WhenOverdriveControlSwitchON→OFFAT-321.

4

,WhenSelectorLeverD→2Position,AT-322.

3→22

,WhenSelectorLever2→1Position,AT-284.

2→11

),AT-318.

3

),AT-318.

2

N23.VehicleDoesNotDecelerateByEngineBrake,AT-324.
NSELF-DIAGNOSTICPROCEDURE—Markdetecteditems.

NPark/neutralposition(PNP)switch,AT-123.
NA/Tfluidtemperaturesensor,AT-129.
NVehiclespeedsensor·A/T(Revolutionsensor),AT-135.
NEnginespeedsignal,AT-140.
NTorqueconverterclutchsolenoidvalve,AT-172.
NLinepressuresolenoidvalve,AT-177.
NShiftsolenoidvalveA,AT-183.
NShiftsolenoidvalveB,AT-188.
NThrottlepositionsensor,AT-193.
NOverrunclutchsolenoidvalve,AT-202.
NPark/neutralposition(PNP),overdrivecontrol,A/Tmodeandthrottlepositionswitches,

AT-324.

NA/TfluidtemperaturesensorandTCMpowersource,AT-207.
NVehiclespeedsensor·MTR,AT-214.
NControlunit(RAM),Controlunit(ROM),AT-274.
NControlunit(EEPROM),AT-276.
NBattery
NOthers

5. NForself-diagnosisNGitems,inspecteachcomponent.Repairorreplacethedamagedparts. AT-41

6. NPerformallROADTESTandre-markrequiredprocedures. AT-84

7. NPerformDTCCONFIRMATIONPROCEDUREforfollowingMILindicatingitemsandcheckoutNGitems.

Referto

EC-45

, “Emission-related Diagnostic Information”.

EC-45

NDTC(P0731)A/T1stgearfunction,AT-145.
NDTC(P0732)A/T2ndgearfunction,AT-151.
NDTC(P0733)A/T3rdgearfunction,AT-157.
NDTC(P0734)A/T4thgearfunction,AT-163.

8. NPerformtheDiagnosticProceduresforallremainingitemsmarkedNG.Repairorreplacethedamaged

parts.

AT-103

AT-116
RefertotheSymptomChartwhenyouperformtheprocedures.(Thechartalsoshowssomeotherpossible
symptomsandthecomponentinspectionorders.)

9. NEraseDTCfromTCMandECMmemories. AT-38

AT-71

Work Flow

TROUBLE DIAGNOSIS — INTRODUCTION

EURO-OBD

Work Flow

HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR

NFAT0025

NFAT0025S01

A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a problem. It is important to fully understand the symptoms
or conditions for a customer complaint.
Make good use of the two sheets provided, “Information from Customer” (AT-69) and “Diagnostic Worksheet”
(AT-70), to perform the best troubleshooting possible.

AT-72

TROUBLEDIAGNOSIS—INTRODUCTION

Work Flow (Cont’d)

EURO-OBD

WORKFLOWCHART

=NFAT0025S02

*1:AT-69
*2:AT-70
*3:AT-9
*4:AT-79
*5:AT-79,AT-83
*6:AT-84

*7:AT-40
*8:AT-36
*9:AT-53
*10:AT-123
*11:AT-214
*12:AT-274

AT-73

*13:AT-276
*14:AT-278
*15:AT-324
*16:AT-103
*17:AT-38

*18:AT-124
*19:AT-215
*20:AT-274
*21:AT-276
*22:

EC-45

SAT181K

TROUBLE DIAGNOSIS —

INTRODUCTION

EXCEPT FOR EURO-OBD

SAT631IA

SAT632I

Introduction

NFAT0284

The TCM receives a signal from the vehicle speed sensor, throttle
position sensor or park/neutral position (PNP) switch and provides
shift control or lock-up control via A/T solenoid valves.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good
operating condition and be free of valve seizure, solenoid valve
malfunction, etc.
It is much more difficult to diagnose a problem that occurs intermit­tently rather than continuously. Most intermittent problems are
caused by poor electric connections or improper wiring. In this
case, careful checking of suspected circuits may help prevent the
replacement of good parts.
A visual check only, may not find the cause of the problems. A road
test with CONSULT-II or a circuit tester connected should be per­formed. Follow the “Work Flow”. Refer to AT-77.
Before undertaking actual checks, take a few minutes to talk with
a customer who approaches with a driveability complaint. The cus­tomer can supply good information about such problems, espe­cially intermittent ones. Find out what symptoms are present and
under what conditions they occur.A“DIAGNOSITC WORKSHEET”
like the example (AT-75) should be used.
Start your diagnosis by looking for “conventional” problems first.
This will help troubleshoot driveability problems on an electronically
controlled engine vehicle.

Also check related Service bulletins for information.

SEF234G

AT-74

TROUBLE DIAGNOSIS —

INTRODUCTION

EXCEPT FOR EURO-OBD

Introduction (Cont’d)

DIAGNOSTIC WORKSHEET
Information from Customer

KEY POINTS

WHAT ........ Vehicle & A/T model

WHEN ........ Date, Frequencies

WHERE ..... Road conditions

HOW .......... Operating conditions, Symptoms

Customer name MR/MS Model & Year VIN
Trans. model Engine Mileage
Incident Date Manuf. Date In Service Date
Frequency N Continuous N Intermittent ( times a day)
Symptoms N Vehicle does not move. (N Any position N Particular position)

N No up-shift (N 1st → 2nd N 2nd → 3rd N 3rd → O/D)
N No down-shift (N O/D → 3rd N 3rd → 2nd N 2nd → 1st)
N Lockup malfunction
N Shift point too high or too low.
N Shift shock or slip (N N → D N Lockup N Any drive position)
N Noise or vibration
N No kickdown

=NFAT0284S01

NFAT0284S0101

N No pattern select
N Others

()

S (SPORT) indicator lamp Blinks for about 8 seconds.

N Continuously lit N Not lit

AT-75

Introduction (Cont’d)

TROUBLE DIAGNOSIS —

INTRODUCTION

EXCEPT FOR EURO-OBD

Diagnostic Worksheet

1. N Read the Fail-safe and listen to customer complaints. AT-9

2. N CHECK A/T FLUID AT-79

N Leakage (Follow specified procedure)
N Fluid condition
N Fluid level

3. N Perform STALL TEST and LINE PRESSURE TEST. AT-79, 83
N Stall test — Mark possible damaged components/others.

N Torque converter one-way clutch
N Reverse clutch
N Forward clutch
N Overrun clutch
N Forward one-way clutch

N Pressure test — Suspected parts:

4. N Perform all ROAD TEST and mark required procedures. AT-84

4-1. Check before engine is started. AT-85

N SELF-DIAGNOSTIC PROCEDURE - Mark detected items.

N Vehicle speed sensor·A/T (Revolution sensor), AT-219.
N Vehicle speed sensor·MTR, AT-224.
N Throttle position sensor, AT-229.
N Shift solenoid valve A, AT-237.
N Shift solenoid valve B, AT-242.
N Overrun clutch solenoid valve, AT-247.
N Torque converter clutch solenoid valve, AT-252.
N A/T fluid temperature sensor and TCM power source, AT-257.
N Engine speed signal, AT-264.
N Line pressure solenoid valve, AT-268.
N Park/neutral position (PNP), overdrive control, A/T mode and throttle position switches, AT-324.
N Control unit (RAM), Control unit (ROM), AT-274.
N Control unit (EEP ROM), AT-276.
N Battery
N Others

N Low & reverse brake
N Low one-way clutch
N Engine
N Line pressure is low
N Clutches and brakes except high clutch and brake

band are OK

=NFAT0284S0102

4-2. Check at idle AT-86

N 1. S (SPORT) Indicator Lamp Does Not Come On, AT-282.
N 2. S (SPORT) or
N 3. O/D OFF Indicator Lamp Does Not Come On, AT-285.
N 4. S (SPORT) Indicator Lamp Does Not Come On, AT-285.
N 5. Engine Cannot Be Started In P and N Position, AT-287.
N 6. In P Position, Vehicle Moves Forward or Backward When Pushed, AT-288.
N 7. In N Position, Vehicle Moves, AT-289.
N 8. Large Shock. N → R Position, AT-292.
N 9. Vehicle Does Not Creep Backward In R Position, AT-294.
N 10. Vehicle Does Not Creep Forward In D, 2 or 1 Position, AT-298.

(SNOW) Indicator Lamp Does Not Come On, AT-284.

AT-76

TROUBLE DIAGNOSIS —

INTRODUCTION

4. 4-3. Cruise test AT-89,
Part-1

EXCEPT FOR EURO-OBD

Introduction (Cont’d)

AT-93

N 11. Vehicle Cannot Be Started From D
N 12. A/T Does Not Shift: D
N 13. A/T Does Not Shift: D
N 14. A/T Does Not Shift: D

→ D2or Does Not Kickdown: D4→ D2, AT-304.

1

, AT-307.

2→D3

, AT-310.

3→D4

, AT-301.

1

N 15. A/T Does Not Perform Lock-up, AT-313.
N 16. A/T Does Not Hold Lock-up Condition, AT-315.
N 17. Lock-up Is Not Released, AT-317.
N 18. Engine Speed Does Not Return To Idle (Light Braking D

→ D3), AT-318.

4

Part-2 AT-97

N 19. Vehicle Does Not Start From D
N 12. A/T Does Not Shift: D
N 13. A/T Does Not Shift: D
N 14. A/T Does Not Shift: D

→ D2or Does Not Kickdown: D4→ D2, AT-304.

1
2→D3
3→D4

, AT-320.

1

, AT-307.
, AT-310.

Part-3 AT-99

N 20. A/T Does Not Shift: D
N 18. Engine Speed Does Not Return To Idle (Engine Brake In D
N 21. A/T Does Not Shift: D
N 18. Engine Speed Does Not Return To Idle (Engine Brake In 2
N 22. A/T Does Not Shift: 2

When Overdrive Control Switch ON → OFF,AT-321.

4→D3

, When Selector Lever D → 2 Position, AT-322.

3→22

, When Selector Lever 2 → 1 Position, AT-323.

2→11

), AT-318.

3

), AT-318.

2

N 23. Vehicle Does Not Decelerate By Engine Brake, AT-324.
N SELF-DIAGNOSTIC PROCEDURE — Mark detected items.

N Vehicle speed sensor·A/T (Revolution sensor), AT-219.
N Vehicle speed sensor·MTR, AT-224.
N Throttle position sensor, AT-229.
N Shift solenoid valve A, AT-237.
N Shift solenoid valve B, AT-242.
N Overrun clutch solenoid valve, AT-247.
N Torque converter clutch solenoid valve, AT-252.
N A/T fluid temperature sensor and TCM power source, AT-257.
N Engine speed signal, AT-264.
N Line pressure solenoid valve, AT-268.
N Park/neutral position (PNP), overdrive control, A/T mode and throttle position switches, AT-324.
N Control unit (RAM), Control unit (ROM), AT-274.
N Control unit (EEP ROM), AT-276.
N Battery
N Others

5. N For self-diagnosis NG items, inspect each component. Repair or replace the damaged parts. AT-57

6. N Perform all ROAD TEST and re-mark required procedures. AT-84

7. N Perform the Diagnostic Procedures for all remaining items marked NG. Repair or replace the damaged parts.

Refer to the Symptom Chart when you perform the procedures. (The chart also shows some other possible

AT-103,
AT-116

symptoms and the component inspection orders.)

8. N Erase DTC from TCM memory. AT-67

Work Flow

HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR

NFAT0285

NFAT0285S01

A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a problem. It is important to fully understand the symptoms
or conditions for a customer complaint.
Make good use of the two sheets provided, “Information from Customer” (AT-75) and “Diagnostic Worksheet”
(AT-76), to perform the best troubleshooting possible.

AT-77

Work Flow (Cont’d)

TROUBLE DIAGNOSIS —

INTRODUCTION

EXCEPT FOR EURO-OBD

WORK FLOW CHART

=NFAT0285S02

*1: AT-75
*2: AT-76
*3: AT-9
*4: AT-79
*5: AT-79,AT-83
*6: AT-84
*7: AT-84

*8: AT-56
*9: AT-56
*10: AT-65
*11: AT-219
*12: AT-276
*13: AT-278

SAT731JB

*14: AT-324
*15: AT-103
*16: AT-60
*17: AT-67
*18: AT-220
*19: AT-276

AT-78

TROUBLEDIAGNOSIS—BASICINSPECTION

A/T Fluid Check

SAT767B

SAT288G

A/TFluidCheck

FLUIDLEAKAGECHECK

NFAT0286

NFAT0286S01

1. Cleanareasuspectedofleaking.—forexample,matingsur­faceofconverterhousingandtransmissioncase.

2. Startengine,applyfootbrake,placeselectorleverinDposi­tionandwaitafewminutes.

3. Stopengine.

4. Checkforfreshleakage.

FLUIDCONDITIONCHECK

Fluidcolor Suspectedproblem

NFAT0286S02

SAT638A

Darkorblackwithburnedodor Wearoffrictionalmaterial

Milkypink

Varnishedfluid,lighttodarkbrown
andtacky

FLUIDLEVELCHECK

Referto

MA-26

, “Checking A/T Fluid”.

StallTest

STALLTESTPROCEDURE

Watercontamination—Roadwater
enteringthroughfillertubeorbreather

Oxidation—Overorunderfilling,—
Overheating

NFAT0286S03

NFAT0287

NFAT0287S01

1. CheckA/Tfluidandengineoillevels.Ifnecessary,addfluid
andoil.

2. Drivevehicleforapprox.10minutesoruntilfluidandoilreach
operatingtemperature.

ATFoperatingtemperature:

50-80°C(122-176°F)

SAT647B

AT-79

Stall Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

3. Set parking brake and block wheels.

4. Install a tachometer where it can be seen by driver during test.

+ It is good practice to mark the point of specified engine

rpm on indicator.

SAT513G

5. Start engine, apply foot brake, and place selector lever in D
position.

6. Accelerate to wide open throttle gradually while applying foot
brake.

7. Quickly note the engine stall revolution and immediately
release throttle.

+ During test, never hold throttle wide open for less than 5

seconds.

Stall revolution:

Refer to SDS, AT-452.

SAT514G

8. Move selector lever to N position.

9. Cool off ATF.

+ Run engine at idle for at least one minute.

10. Repeat steps 5 through 9 with selector lever in 2, 1 and R
positions.

SAT771B

JUDGEMENT OF STALL TEST

NFAT0287S02

The test result and possible damaged components relating to each
result are shown in the illustrations on next page.
In order to pinpoint the possible damaged components, follow the
“WORK FLOW CHART” shown in AT-73 (EURO-OBD) or AT-78
(EXCEPT FOR EURO-OBD).

NOTE:

Stall revolution is too high in D, 2 or 1 position:

+ Slippage occurs in 1st gear but not in 2nd and 3rd gears. .....

Low one-way clutch slippage

+ Slippage occurs in the following gears:

1st through 3rd gears in D position and engine brake functions
with overdrive control switch set to OFF.
1st and 2nd gears in 2 position and engine brake functions with

accelerator pedal released (fully closed throttle). ..... Forward

clutch or forward one-way clutch slippage

Stall revolution is too high in R position:

+ Engine brake does not function in 1 position. ..... Low & reverse

brake slippage

+ Engine brake functions in 1 position. ..... Reverse clutch slip-

page

Stall revolution within specifications:

AT-80

TROUBLE DIAGNOSIS — BASIC INSPECTION

+ Vehicle does not achieve speed of more than 80 km/h (50

MPH). ..... One-way clutch seizure in torque converter housing

CAUTION:

Be careful since automatic fluid temperature increases abnor­mally.

+ Slippage occurs in 3rd and 4th gears in D position. ..... High

clutch slippage

+ Slippage occurs in 2nd and 4th gear in D position. ..... Brake

band slippage

+ Engine brake does not function in 2nd and 3rd gears in D

position, 2nd gear in 2 position, and 1st gear in 1 position with
overdrive control switch set to OFF.

Stall revolution less than specifications:

+ Poor acceleration during starts. ..... One-way clutch seizure in

torque converter

Stall Test (Cont’d)

AT-81

Stall Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

AT-82

SAT600J

TROUBLE DIAGNOSIS — BASIC INSPECTION

Line Pressure Test

SAT301FA

SAT647B

Line Pressure Test

LINE PRESSURE TEST PORTS

NFAT0288

NFAT0288S01

Location of line pressure test ports are shown in the illustration.

+ Always replace pressure plugs as they are self-sealing

bolts.

LINE PRESSURE TEST PROCEDURE

NFAT0288S02

1. Check A/T fluid and engine oil levels. If necessary, add fluid
and oil.

2. Drive vehicle for approx. 10 minutes or until fluid and oil reach
operating temperature.

ATF operating temperature:

50 - 80°C (122 - 176°F)

3. Install pressure gauge to corresponding line pressure port.

AAT898

SAT513G

SAT493G

4. Set parking brake and block wheels.

+ Continue to depress brake pedal fully while line pressure

test is being performed at stall speed.

5. Start engine and measure line pressure at idle and stall speed.

+ When measuring line pressure at stall speed, follow the

stall test procedure.

Line pressure: Refer to SDS, AT-452.

AT-83

Line Pressure Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

At idle

JUDGEMENT OF LINE PRESSURE TEST

Judgement Suspected parts

Line pressure is low in all positions. + Oil pump wear

+ Control piston damage
+ Pressure regulator valve or plug sticking
+ Spring for pressure regulator valve damaged
+ Fluid pressure leakage between oil strainer and

pressure regulator valve

+ Clogged strainer

Line pressure is low in particular position. + Fluid pressure leakage between manual valve and

particular clutch

+ For example, line pressure is:

− Low in R and 1 positions, but

− Normal in D and 2 positions.
Therefore, fluid leakage exists at or around low and
reverse brake circuit.
Refer to “CLUTCH AND BAND CHART”, AT-20.

Line pressure is high. + Maladjustment of throttle position sensor

+ A/T fluid temperature sensor damaged
+ Line pressure solenoid valve sticking
+ Short circuit of line pressure solenoid valve circuit
+ Pressure modifier valve sticking
+ Pressure regulator valve or plug sticking
+ Open in dropping resistor circuit

NFAT0288S03

At stall speed

Line pressure is low. + Maladjustment of throttle position sensor

+ Line pressure solenoid valve sticking
+ Short circuit of line pressure solenoid valve circuit
+ Pressure regulator valve or plug sticking
+ Pressure modifier valve sticking
+ Pilot valve sticking

Road Test

DESCRIPTION

+ The purpose of the test is to determine overall performance of

A/T and analyze causes of problems.

+ The road test consists of the following three parts:

1. Check before engine is started

2. Check at idle

3. Cruise test

SAT786A

+ Before road test, familiarize yourself with all test procedures

and items to check.

+ Conduct tests on all items until specified symptom is found.

Troubleshoot items which check out No Good after road test.
Refer to “ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION”, AT-36 to AT-53 (EURO-OBD) or AT-56 to
AT-65 (EXCEPT FOR EURO-OBD) and “TROUBLE DIAG­NOSES FOR SYMPTOMS”, AT-278 to AT-324.

NFAT0289

NFAT0289S01

SAT496G

AT-84

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

1. CHECK BEFORE ENGINE IS STARTED

=NFAT0289S02

1 CHECK S (SPORT) INDICATOR LAMP

1. Park vehicle on flat surface.

2. Move selector lever to P position.

SAT163C

3. Turn ignition switch to OFF position. Wait at least 5 seconds.

4. Turn ignition switch to ON position. (Do not start engine.)

5. Does S (SPORT) indicator lamp come on for about 2 seconds?

YesorNo

Yes © GO TO 2.
No © Stop ROAD TEST. Go to “1. S (SPORT) Indicator Lamp Does Not Come On”, AT-282.

2 CHECK S (SPORT) INDICATOR LAMP

Does S (SPORT) indicator lamp flicker for about 8 seconds?

SAT116K

YesorNo

Yes © Perform self-diagnosis and check NG items on the DIAGNOSTIC WORKSHEET, EURO-

OBD: AT-70, EXCEPT FOR EURO-OBD: AT-76. EURO-OBD: Refer to TCM SELF-DIAG­NOSTIC PROCEDURE (NO TOOLS), AT-49. EXCEPT FOR EURO-OBD: Refer to SELF­DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-II), AT-61.

No © 1. Turn ignition switch to OFF position.

2. Perform self-diagnosis and note NG items.
EURO-OBD: Refer to TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS), AT-49.
EXCEPT FOR EURO-OBD: Refer to SELF-DIAGNOSTIC PROCEDURE (WITHOUT
CONSULT-II), AT-61.

3. Go to “2. CHECK AT IDLE”, AT-86.

AT-85

Road Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

2. CHECK AT IDLE

NFAT0289S03

1 CHECK ENGINE START

1. Park vehicle on flat surface.

2. Move selector lever to P position.

SAT769B

3. Turn ignition switch to OFF position.

4. Turn ignition switch to START position.

5. Is engine started?

YesorNo

Yes © GO TO 2.
No © Mark the box on the DIAGNOSTIC WORKSHEET. Go to “5. Engine Cannot Be Started

In P and N Position”, AT-287. Continue ROAD TEST.

2 CHECK ENGINE START

1. Turn ignition switch to ACC position.

2. Move selector lever to D, 1, 2 or R position.

SAT770B

3. Turn ignition switch to START position.

4. Is engine started?

YesorNo

Yes © Mark the box on the DIAGNOSTIC WORKSHEET. Mark the box on the DIAGNOSTIC

WORKSHEET. Go to “5. Engine Cannot Be Started In P and N Position”, AT-287. Con­tinue ROAD TEST.

No © GO TO 3.

AT-86

TROUBLE DIAGNOSIS — BASIC INSPECTION

3 CHECK VEHICLE MOVE

1. Move selector lever to P position.

2. Turn ignition switch to OFF position.

3. Release parking brake.

4. Push vehicle forward or backward.

Road Test (Cont’d)

SAT768B

SAT796A

5. Does vehicle move when it is pushed forward or backward?

6. Apply parking brake.

YesorNo

Yes © Mark the box on the DIAGNOSTIC WORKSHEET. Go to “6. In P Position, Vehicle Moves

Forward Or Backward When Pushed”, AT-288. Continue ROAD TEST.

No © GO TO 4.

4 CHECK VEHICLE MOVE

1. Start engine.

2. Move selector lever to N position.

SAT771B

3. Release parking brake.

4. Does vehicle move forward or backward?

YesorNo

Yes © Mark the box on the DIAGNOSTIC WORKSHEET. Go to “7. In N Position, Vehicle

Moves”, AT-289. Continue ROAD TEST.

No © GO TO 5.

AT-87

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

5 CHECK SHIFT LOCK

1. Apply foot brake.

2. Move selector lever to R position.

SAT797A

SAT772B

3. Is there large shock when changing from N to R position?

YesorNo

Yes © Mark the box on the DIAGNOSTIC WORKSHEET. Go to “8. Large Shock N → R

Position”, AT-292. Continue ROAD TEST.

No © GO TO 6.

6 CHECK VEHICLE MOVE

1. Release foot brake for several seconds.

SAT799A

2. Does vehicle creep backward when foot brake is released?

YesorNo

Yes © GO TO 7.
No © Mark the box on the DIAGNOSTIC WORKSHEET. Go to “9. Vehicle Does Not Creep

Backward In R Position”, AT-294. Continue ROAD TEST.

AT-88

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

7 CHECK VEHICLE MOVE

1. Move selector lever to D, 2 and 1 positions and check if vehicle creeps forward.

SAT773B

2. Does vehicle creep forward in all three positions?

YesorNo

Yes © Go to 3. CRUISE TEST, AT-89.
No © Mark the box on the DIAGNOSTIC WORKSHEET. Go to “10. Vehicle Does Not Creep

Forward In D, 2 Or 1 Position”, AT-298. Continue ROAD TEST.

SAT601J

SAT585JA

3. CRUISE TEST

NFAT0289S04

+ Check all items listed in Parts 1 through 3.

With CONSULT-II

NFAT0289S0401

+ Using CONSULT-II, conduct a cruise test and record the result.
+ Print the result and ensure that shifts and lock-ups take place

as per Shift Schedule.

CONSULT-II Setting Procedure

NFAT0289S0402

1. Turn ignition switch OFF.

2. Connect CONSULT-II to data link connector, which is located
in left side dash panel.

SAT976J

AT-89

Road Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

3. Turn ignition switch ON.

4. Touch “START”.

SAT586J

5. Touch “A/T”.

SAT580J

SAT971J

SAT175K

6. Touch “DATA MONITOR”.

7. Touch “MAIN SIGNALS” or “TCM INPUT SIGNALS”.

8. Select “Numerical Display”, “Barchart Display” or “Line Graph
Display”.

9. Touch “SETTING” to recording condition (“AUTO TRIG” or
“MANU TRIG”) and touch “BACK”.

10. Touch “Start”.

SAT973J

AT-90

TROUBLE DIAGNOSIS — BASIC INSPECTION

11. When performing cruise test, touch “RECORD”.

SAT985J

12. After finishing cruise test part 1, touch “STOP”.

Road Test (Cont’d)

SAT986J

SAT987J

SAT974J

13. Touch “STORE” and touch “BACK”.

14. Touch “DISPLAY”.

15. Touch “PRINT”.

16. Check the monitor data printed out.

17. Continue cruise test part 2 and 3.

SAT975J

AT-91

Road Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

SAT331JA

Without CONSULT-II

NFAT0289S0403

+ Throttle position sensor can be checked by voltage across

terminals 41 and 42 of TCM.

AT-92

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

Cruise Test — Part 1

1 CHECK STARTING GEAR (D1) POSITION

1. Drive vehicle for approx. 10 minutes to warm engine oil and ATF up to operating temperature.

ATF operating temperature:

50 - 80°C (122 - 176°F)

2. Park vehicle on flat surface.

3. Set overdrive control switch to ON position.

4. Move selector lever to P position.

5. Start engine.

6. Move selector lever to D position.

=NFAT0289S0404

SAT118K

7. Accelerate vehicle by constantly depressing accelerator pedal half-way.

8. Does vehicle start from D1?

Read gear position.

YesorNo

Yes © GO TO 2.
No © Go to “11. Vehicle Cannot Be Started From D

”, AT-301. Continue ROAD TEST.

1

SAT775B

SAT495G

AT-93

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

2 CHECK SHIFT UP (D1TO D2)

Does A/T shift from D1to D2at the specified speed?

Read gear position, throttle opening and vehicle speed.

Specified speed when shifting from D

Refer to Shift schedule, AT-451.

Yes © GO TO 3.
No © Go to “12. A/T Does Not Shift: D

tinue ROAD TEST.

to D2:

1

YesorNo

SAT954I

→ D2Or Does Not Kickdown: D4→ D2”, AT-304. Con-

1

3 CHECK SHIFT UP (D2TO D3)

Does A/T shift from D2to D3at the specified speed?

Read gear position, throttle position and vehicle speed.

Specified speed when shifting from D

to D3:

2

Refer to Shift schedule, AT-451.

YesorNo

Yes © GO TO 4.
No © Go to “13. A/T Does Not Shift: D

→ D3”, AT-307. Continue ROAD TEST.

2

SAT955I

AT-94

TROUBLE DIAGNOSIS — BASIC INSPECTION

4 CHECK SHIFT UP (D3TO D4)

Does A/T shift from D3to D4at the specified speed?

Read gear position, throttle position and vehicle speed.

Specified speed when shifting from D

Refer to shift schedule, AT-451.

Yes © GO TO 5.
No © Go to “14. A/T Does Not Shift: D

5 CHECK LOCK-UP (D4TO D4L/U)

Does A/T perform lock-up at the specified speed?

Read vehicle speed, throttle position when lock-up duty becomes 94%.

Specified speed when lock-up occurs:

Refer to Shift schedule, AT-451.

to D4:

3

YesorNo

→ D4”, AT-310. Continue ROAD TEST.

3

Road Test (Cont’d)

SAT956I

YesorNo

Yes © GO TO 6.
No © Go to “15. A/T Does Not Perform Lock-up”, AT-313. Continue ROAD TEST.

6 CHECK HOLD LOCK-UP

Does A/T hold lock-up condition for more than 30 seconds?

YesorNo

Yes © GO TO 7.
No © Go to “16. A/T Does Not Hold Lock-up Condition”, AT-315.

SAT957I

AT-95

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

7 CHECK SHIFT DOWN (D4L/U TO D4)

1. Release accelerator pedal.

2. Is lock-up released when accelerator pedal is released?

YesorNo

Yes © GO TO 8.
No © Go to “17. Lock-up Is Not Released”, AT-317. Continue ROAD TEST.

8 CHECK SHIFT DOWN (D4TO D3)

1. Decelerate vehicle by applying foot brake lightly.

SAT958I

2. Does engine speed return to idle smoothly when A/T is shifted from D4to D3?

Read gear position and engine speed.

YesorNo

Yes © 1. Stop vehicle.

2. Go to “Cruise Test — Part 2”, AT-97.

No © Go to “18. Engine Speed Does Not Return To Idle (Light Braking D

Continue ROAD TEST.

→ D3)”, AT-318.

4

SAT959I

AT-96

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

Cruise Test — Part 2

1 CHECK STARTING GEAR (D1) POSITION

1. Confirm overdrive control switch is in ON position.

2. Confirm selector lever is in D position.

3. Accelerate vehicle by half throttle again.

4. Does vehicle start from D1?

Read gear position.

YesorNo

Yes © GO TO 2.
No © Go to “19. Vehicle Does Not Start From D

”, AT-320. Continue ROAD TEST.

1

=NFAT0289S0405

SAT495G

2 CHECK SHIFT UP AND SHIFT DOWN (D3TO D4TO D2)

1. Accelerate vehicle to 80 km/h (50 MPH) as shown in illustration.

2. Release accelerator pedal and then quickly depress it fully.

3. Does A/T shift from D4to D2as soon as accelerator pedal is depressed fully?

Read gear position and throttle position.

YesorNo

Yes © GO TO 3.
No © Go to “12. A/T Does Not Shift: D

→ D2Or Does Not Kickdown: D4→ D2”, AT-304. Con-

1

tinue ROAD TEST.

SAT404H

AT-97

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

3 CHECK SHIFT UP (D2TO D3)

Does A/T shift from D2to D3at the specified speed?

Read gear position, throttle position and vehicle speed.

Specified speed when shifting from D

Refer to Shift schedule, AT-451.

Yes © GO TO 4.
No © Go to “13. A/T Does Not Shift: D

4 CHECK SHIFT UP (D3TO D4) AND ENGINE BRAKE

Release accelerator pedal after shifting from D2to D3.
Does A/T shift from D

to D4and does vehicle decelerate by engine brake?

3

Read gear position, throttle position and vehicle speed.

to D3:

2

YesorNo

→ D3”, AT-307. Continue ROAD TEST.

2

SAT960I

YesorNo

Yes © 1. Stop vehicle.

2. Go to “CRUISE TEST — Part 3”, AT-99.

No © Go to “14. A/T Does Not Shift: D

AT-98

→ D4”, AT-310. Continue ROAD TEST.

3

SAT405H

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

Cruise Test — Part 3

1 VEHICLE SPEED (D4) POSITION

1. Confirm overdrive control switch is in ON position.

2. Confirm selector lever is in D position.

3. Accelerate vehicle using half-throttle to D

4. Release accelerator pedal.

.

4

=NFAT0289S0406

SAT812A

5. Set overdrive control switch to OFF position while driving in D4.

6. Does A/T shift from D

to D3(O/D OFF)?

4

Read gear position and vehicle speed.

YesorNo

Yes © GO TO 2.
No © Go to “20. A/T Does Not Shift: D

AT-321. Continue ROAD TEST.

→ D3, When Overdrive Control Switch ON → OFF,

4

SAT813A

SAT119K

AT-99