Nissan Maxima 2003 User Manual

Page 1

Edition: MAY 2002 Revision: APRIL 2004 Publication No. SM3E-1A33U3

QUICK REFERENCE INDEX

All rights reserved. No part of this Service Manual may be reproduced or stored in a retrieval system, or transmitted in any form, or by any means, electronic, mechanical, photo-copying, recording or otherwise, without the prior written permission of Nissan Motor Company Ltd., Tokyo, Japan.

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FOREWORD

This manual contains maintenance and repair procedures for the 2003 Nissan MAXIMA.

In order to assure your safety and the efficient functioning of the vehicle, this manual should be read thoroughly. It is especially important that the PRECAUTIONS in the GI section be completely understood before starting any repair task.

All information in this manual is based on the latest product information at the time of publication. The right is reserved to make changes in specifications and methods at any time without notice.

IMPORTANT SAFETY NOTICE

The proper performance of service is essential for both the safety of the technician and the efficient functioning of the vehicle. The service methods in this Service Manual are described in such a manner that the service may be performed safely and accurately. Service varies with the procedures used, the skills of the technician and the tools and parts available. Accordingly, anyone using service procedures, tools or parts which are not specifically recommended by NISSAN must first be completely satisfied that neither personal safety nor the vehicle’s safety will be jeopardized by the service method selected.

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PLEASE HELP MAKE THIS SERVICE MANUAL BETTER!

Your comments are important to NISSAN and will help us to improve our Service Manuals.

Use this form to report any issues or comments you may have regarding our Service Manuals.

Please print this form and type or write your comments below. Mail or fax to:

Nissan North America, Inc. Technical Service Information 39001 Sunrise Drive, P.O. Box 9200 Farmington Hills, MI USA 48331 FAX: (248) 488-3910

SERVICE MANUAL: Model: Year:

PUBLICATION NO. (Refer to Quick Reference Index ):

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Note: Please include a copy of each page, marked with your comments.

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NOTES

Page 5

AUTOMATIC TRANSAXLE

CONTENTS

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 (OBD)

System of A/T and Engine...........................................7

Precautions..................................................................8

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

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

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

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

Commercial Service Tools.........................................14

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

CAN Communication .................................................29

Control Mechanism....................................................31

Control Valve .............................................................35

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION...............................................................37

Introduction................................................................37

OBD-II Function for A/T System................................37

One or Two Trip Detection Logic of OBD-II ..............37

OBD-II Diagnostic Trouble Code (DTC)....................37

Malfunction Indicator Lamp (MIL)..............................41

CONSULT-II...............................................................41

Diagnostic Procedure Without CONSULT-II..............53

TROUBLE DIAGNOSIS - INTRODUCTION..................59

Introduction................................................................59

Work Flow..................................................................63

TROUBLE DIAGNOSIS - BASIC INSPECTION...........65

A/T Fluid Check.........................................................65

Stall Test ....................................................................65

Line Pressure Test.....................................................69

SECTION

Road Test...................................................................70

TROUBLE DIAGNOSIS - GENERAL

DESCRIPTION...............................................................88

Symptom Chart..........................................................88

TCM Terminals and Reference Value........................99

TROUBLE DIAGNOSIS FOR POWER SUPPLY........102

Wiring Diagram - AT - MAIN....................................102

Diagnostic Procedure ..............................................103

DTC U1000 CAN COMMUNICATION LINE ...............105

Description...............................................................105

On Board Diagnosis Logic.......................................105

Possible Cause........................................................105

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................106

Wiring Diagram - AT - CAN.....................................107

Diagnostic Procedure ..............................................108

DTC P0705 PARK/NEUTRAL POSITION SWITCH...109

Description...............................................................109

On Board Diagnosis Logic.......................................109

Possible Cause........................................................110

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................110

Wiring Diagram - AT - PNP/SW...............................111

Diagnostic Procedure ..............................................112

DTC P0710 A/T FLUID TEMPERATURE SENSOR

CIRCUIT.......................................................................115

Description...............................................................115

On Board Diagnosis Logic.......................................115

Possible Cause........................................................116

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................116

Wiring Diagram - AT - FTS......................................117

Diagnostic Procedure ..............................................118

DTC P0720 VEHICLE SPEED SENSOR.A/T

(REVOLUTION SENSOR) ...........................................121

Description...............................................................121

On Board Diagnosis Logic.......................................121

Possible Cause........................................................121

IDX

Page 6

CONTENTS (Cont’d)

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................122

Wiring Diagram - AT - VSSA/T................................123

Diagnostic Procedure ..............................................124

DTC P0725 ENGINE SPEED SIGNAL .......................126

Description...............................................................126

On Board Diagnosis Logic.......................................126

Possible Cause........................................................126

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................127

Wiring Diagram - AT - ENGSS................................128

Diagnostic Procedure ..............................................129

DTC P0731 A/T 1ST GEAR FUNCTION ....................131

Description...............................................................131

On Board Diagnosis Logic.......................................131

Possible Cause........................................................132

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................132

Wiring Diagram - AT - 1ST......................................134

Diagnostic Procedure ..............................................135

DTC P0732 A/T 2ND GEAR FUNCTION....................137

Description...............................................................137

On Board Diagnosis Logic.......................................137

Possible Cause........................................................138

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................138

Wiring Diagram - AT - 2ND......................................140

Diagnostic Procedure ..............................................141

DTC P0733 A/T 3RD GEAR FUNCTION....................143

Description...............................................................143

On Board Diagnosis Logic.......................................143

Possible Cause........................................................144

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................144

Wiring Diagram - AT - 3RD......................................146

Diagnostic Procedure ..............................................147

DTC P0734 A/T 4TH GEAR FUNCTION ....................149

Description...............................................................149

On Board Diagnosis Logic.......................................150

Possible Cause........................................................150

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................151

Wiring Diagram - AT - 4TH......................................153

Diagnostic Procedure ..............................................154

DTC P0740 TORQUE CONVERTER CLUTCH

SOLENOID VALVE......................................................158

Description...............................................................158

On Board Diagnosis Logic.......................................158

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

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................159

Wiring Diagram - AT - TCV......................................160

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

DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) ....163

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

On Board Diagnosis Logic.......................................163

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

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................164

Wiring Diagram - AT - TCCSIG...............................166

Diagnostic Procedure ..............................................167

DTC P0745 LINE PRESSURE SOLENOID VALVE...173

Description...............................................................173

On Board Diagnosis Logic.......................................173

Possible Cause........................................................174

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................174

Wiring Diagram - AT - LPSV....................................175

Diagnostic Procedure ..............................................176

DTC P0750 SHIFT SOLENOID VALVE A ..................179

Description...............................................................179

On Board Diagnosis Logic.......................................179

Possible Cause........................................................179

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................180

Wiring Diagram - AT - SSV/A..................................181

Diagnostic Procedure ..............................................182

DTC P0755 SHIFT SOLENOID VALVE B..................184

Description...............................................................184

On Board Diagnosis Logic.......................................184

Possible Cause........................................................184

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................185

Wiring Diagram - AT - SSV/B..................................186

Diagnostic Procedure ..............................................187

DTC P1705 ACCELERATOR PEDAL POSITION

SENSOR (THROTTLE POSITION SENSOR).............189

Description...............................................................189

On Board Diagnosis Logic.......................................190

Possible Cause........................................................190

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................191

Wiring Diagram - AT - TPS......................................192

Diagnostic Procedure ..............................................193

DTC P1760 OVERRUN CLUTCH SOLENOID

VALVE..........................................................................196

Description...............................................................196

On Board Diagnosis Logic.......................................196

Possible Cause........................................................196

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................197

Wiring Diagram - AT - OVRCSV..............................198

Diagnostic Procedure ..............................................199

AT-2

Page 7

CONTENTS (Cont’d)

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

SENSOR CIRCUIT AND TCM POWER SOURCE)....201

Description...............................................................201

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

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

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................202

Wiring Diagram - AT - BA/FTS................................203

Diagnostic Procedure ..............................................204

DTC VEHICLE SPEED SENSOR.MTR.......................208

Description...............................................................208

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

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

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................209

Wiring Diagram - AT - VSSMTR..............................210

Diagnostic Procedure ..............................................211

DTC POWER TRAIN REVOLUTION SENSOR ..........213

Description...............................................................213

On Board Diagnosis Logic.......................................213

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................214

Wiring Diagram - AT - P/T SEN-01 .........................215

Diagnostic Procedure ..............................................216

Component Inspection.............................................217

DTC CONTROL UNIT (RAM), CONTROL UNIT

(ROM)...........................................................................218

Description...............................................................218

On Board Diagnosis Logic.......................................218

Possible Cause........................................................218

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................218

Diagnostic Procedure ..............................................219

DTC CONTROL UNIT (EEP ROM).............................220

Description...............................................................220

On Board Diagnosis Logic.......................................220

Possible Cause........................................................220

Diagnostic Trouble Code (DTC) Confirmation

Procedure ................................................................220

Diagnostic Procedure ..............................................221

TROUBLE DIAGNOSES FOR SYMPTOMS...............222

Wiring Diagram - AT - NONDTC .............................222

A/T CHECK Indicator Lamp Does Not Come On ...224

Engine Cannot Be Started In P and N Position......226

In P Position, Vehicle Moves Forward or

Backward When Pushed.........................................228

In N Position, Vehicle Moves...................................229

Large Shock. N -> R Position .................................231

Vehicle Does Not Creep Backward In R Position...233 Vehicle Does Not Creep Forward in D, 2nd or

1st Position ..............................................................236

Vehicle Cannot Be Started From D

.......................239

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

A/T Does Not Perform Lock-up...............................251

A/T Does Not Hold Lock-up Condition....................253

Lock-up Is Not Released.........................................255

Engine Speed Does Not Return To Idle (Light Braking D Vehicle Does Not Start From D A/T Does Not Shift: D

Switch ON -> OFF...................................................260

A/T Does Not Shift: D

Lever D -> 2nd Position ..........................................261

A/T Does Not Shift: 2

Lever 2nd -> 1st Position ........................................262

Vehicle Does Not Decelerate By Engine Brake......265

TCM Self-diagnosis Does Not Activate ...................267

A/T SHIFT LOCK SYSTEM.........................................276

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

Shift Lock System Electrical Parts Location............276

Wiring Diagram - SHIFT -........................................277

Shift Lock Control Unit Reference Values...............278

Component Inspection.............................................279

SHIFT CONTROL SYSTEM........................................281

Control Cable...........................................................281

ON-VEHICLE SERVICE ..............................................282

Control Valve Assembly and Accumulators.............282

Revolution Sensor Replacement.............................283

Park/Neutral Position (PNP) Switch Adjustment .....283

Control Cable Adjustment........................................284

Differential Side Oil Seal Replacement...................284

REMOVAL AND INSTALLATION...............................285

Removal...................................................................285

Installation................................................................286

OVERHAUL .................................................................288

Components.............................................................288

Oil Channel..............................................................291

Locations of Adjusting Shims, Needle Bearings,

Thrust Washers and Snap Rings ............................292

DISASSEMBLY............................................................293

REPAIR FOR COMPONENT PARTS .........................307

Manual Shaft............................................................307

Oil Pump..................................................................310

Control Valve Assembly...........................................314

Control Valve Upper Body.......................................322

Control Valve Lower Body.......................................326

Reverse Clutch ........................................................328

High Clutch ..............................................................331

Forward and Overrun Clutches ...............................336

Low & Reverse Brake..............................................341

-> D2..................................................242

-> D3).....................................................256

-> D2or Does Not

-> D3...................................245

-> D4...................................248

.............................259

-> D3, When 3rd Position

-> 22, When Selector

-> 11, When Selector

IDX

AT-3

Page 8

CONTENTS (Cont’d)

Rear Internal Gear, Forward Clutch Hub and

Overrun Clutch Hub.................................................344

Output Shaft, Idler Gear, Reduction Pinion Gear

and Bearing Retainer...............................................348

Band Servo Piston Assembly..................................353

Final Drive................................................................358

ASSEMBLY..................................................................362

Assembly (1)............................................................362

Adjustment (1) .........................................................362

Assembly (2)............................................................367

Adjustment (2) .........................................................373

Assembly (3)............................................................375

SERVICE DATA AND SPECIFICATIONS (SDS).......381

General Specifications.............................................381

Shift Schedule..........................................................381

Stall Revolution........................................................381

Line Pressure...........................................................382

Control Valves..........................................................382

Accumulator.............................................................382

Clutch and Brakes...................................................383

Final Drive................................................................385

Planetary Carrier and Oil Pump..............................386

Input Shaft ...............................................................387

Reduction Pinion Gear ............................................387

Band Servo..............................................................388

Output Shaft.............................................................388

Bearing Retainer......................................................389

Total End Play..........................................................389

Reverse Clutch End Play ........................................389

Removal and Installation.........................................390

Shift Solenoid Valves...............................................390

Solenoid Valves.......................................................390

A/T Fluid Temperature Sensor.................................390

Revolution Sensor (For Speed Sensor)..................390

Dropping Resistor....................................................390

Power Train Revolution Sensor...............................390

AT-4

Page 9

TROUBLE DIAGNOSIS — INDEX

Alphabetical & P No. Index for DTC

ALPHABETICAL INDEX FOR DTC

Items

(CONSULT-II screen terms)

A/T 1ST GR FNCTN P0731 AT-131 A/T 2ND GR FNCTN P0732 AT-137 A/T 3RD GR FNCTN P0733 AT-143 A/T 4TH GR FNCTN P0734 AT-149 A/T TCC S/V FNCTN P0744 AT-163 ATF TEMP SEN/CIRC P0710 AT-115 CAN COMM CIRCUIT U1000 AT-105 ENGINE SPEED SIG P0725 AT-126 L/PRESS SOL/CIRC P0745 AT-173 O/R CLTCH SOL/CIRC P1760 AT-196 PNP SW/CIRC P0705 AT-109 SFT SOL A/CIRC*2 P0750 AT-179

DTC

CONSULT-II

GST*1

Reference page

NFAT0001

NFAT0001S01

SFT SOL B/CIRC*2 P0755 AT-184 TCC SOLENOID/CIRC P0740 AT-158 TP SEN/CIRC A/T*2 P1705 AT-189 VEH SPD SEN/CIR AT*3 P0720 AT-121

*1: These numbers are prescribed by SAE J2012. *2: When the fail-safe operation occurs, the MIL illuminates. *3: The MIL illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor signal” meet the fail-safe condition at

the same time.

AT-5

IDX

Page 10

TROUBLE DIAGNOSIS — INDEX

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

P NO. INDEX FOR DTC

DTC

CONSULT-II

GST*1 P0705 PNP SW/CIRC AT-109 P0710 ATF TEMP SEN/CIRC AT-115 P0720 VEH SPD SEN/CIR AT*3 AT-121 P0725 ENGINE SPEED SIG AT-126 P0731 A/T 1ST GR FNCTN AT-131 P0732 A/T 2ND GR FNCTN AT-137 P0733 A/T 3RD GR FNCTN AT-143 P0734 A/T 4TH GR FNCTN AT-149 P0740 TCC SOLENOID/CIRC AT-158 P0744 A/T TCC S/V FNCTN AT-163 P0745 L/PRESS SOL/CIRC AT-173 P0750 SFT SOL A/CIRC*2 AT-179 P0755 SFT SOL B/CIRC*2 AT-184

Items

(CONSULT-II screen terms)

=NFAT0001S02

Reference page

P1705 TP SEN/CIRC A/T*2 AT-189 P1760 O/R CLTCH SOL/CIRC AT-196 U1000 CAN COMM CIRCUIT AT-105

the same time.

AT-6

Page 11

PRECAUTIONS

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

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. The SRS system composition which is available to NISSAN MODEL A33 is as follows:

쐌 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, crash zone sensor, warning lamp, wiring harness and spiral cable.

쐌 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:

쐌 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.

쐌 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.

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

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harness connector.

NFAT0002

Precautions for On Board Diagnostic (OBD) System of A/T and Engine

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:

쐌 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 MIL to light up.

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

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

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

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

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

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

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

ECM before returning the vehicle to the customer.

NFAT0003

AT-7

IDX

Page 12

Precautions

PRECAUTIONS

SEF289H

AAT470A

Precautions

NFAT0004

쐌 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.

쐌 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.

쐌 Before replacing TCM, perform TCM input/output signal

inspection and make sure whether TCM functions properly or not. (See page AT-99.)

MEF040DA

SAT964I

쐌 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.

쐌 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.

쐌 Disassembly should be done in a clean work area. 쐌 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.

쐌 Place disassembled parts in order for easier and proper

assembly.

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

non-flammable solvent before inspection or reassembly.

AT-8

Page 13

PRECAUTIONS

Precautions (Cont’d)

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

transaxle is disassembled.

쐌 It is very important to perform functional tests whenever they

are indicated.

쐌 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.

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

bores in valve body under their own weight.

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

parts. Apply petroleum jelly to protect O-rings and seals, or hold bearings and washers in place during assembly. Do not use grease.

쐌 Extreme care should be taken to avoid damage to O-rings,

seals and gaskets when assembling.

쐌 Replace ATF cooler if excessive foreign material is found in oil

pan or clogging strainer. Refer to “ATF COOLER SERVICE” (Refer to AT-10).

쐌 After overhaul, refill the transaxle with new ATF. 쐌 When the A/T drain plug is removed, only some of the fluid is

drained. Old A/T fluid will remain in torque converter and ATF cooling system. Always follow the procedures under MA-21, “Changing A/T Fluid” when changing A/T fluid.

Service Notice or Precautions

FAIL-SAFE

The TCM has an electronic Fail-Safe (limp home mode). This allows the vehicle to be driven even if a major electrical input/output device circuit is damaged. Under Fail-Safe, the vehicle always runs in third gear, even with a shift lever position of 1st, 2nd or D. The customer may complain of sluggish or poor acceleration. When the ignition key is turned ON following Fail-Safe operation, A/T CHECK indicator lamp blinks for about 8 seconds. [For “TCM Self-diagnostic Procedure (No Tools)”, refer to AT-53.] The blinking of the A/T CHECK indicator lamp for about 8 seconds will appear only once and be cleared. The customer may resume normal driving conditions. Always follow the “Work Flow” (Refer to AT-63). The SELF-DIAGNOSIS results will be as follows:

쐌 The first SELF-DIAGNOSIS will indicate damage to the vehicle speed sensor or the revolution sensor. 쐌 During the next SELF-DIAGNOSIS, performed after checking the sensor, no damages will be indicated.

TORQUE CONVERTER SERVICE

The torque converter should be replaced under any of the following conditions:

쐌 External leaks in the hub weld area. 쐌 Converter hub is scored or damaged. 쐌 Converter pilot is broken, damaged or fits poorly into crankshaft. 쐌 Steel particles are found after flushing the cooler and cooler lines. 쐌 Pump is damaged or steel particles are found in the converter.

NFAT0005

NFAT0005S01

NFAT0005S02

IDX

AT-9

Page 14

PRECAUTIONS

Service Notice or Precautions (Cont’d)

쐌 Vehicle has TCC shudder and/or no TCC apply. Replace only after all hydraulic and electrical diagnoses

have been made. (Converter clutch material may be glazed.)

쐌 Converter is contaminated with engine coolant containing antifreeze. 쐌 Internal failure of stator roller clutch. 쐌 Heavy clutch debris due to overheating (blue converter). 쐌 Steel particles or clutch lining material found in fluid filter or on magnet when no internal parts in unit are

worn or damaged — indicates that lining material came from converter. The torque converter should not be replaced if:

쐌 The fluid has an odor, is discolored, and there is no evidence of metal or clutch facing particles. 쐌 The threads in one or more of the converter bolt holes are damaged. 쐌 Transaxle malfunction did not display evidence of damaged or worn internal parts, steel particles or clutch

plate lining material in unit and inside the fluid filter.

쐌 Vehiclehas been exposed to high mileage (only). The exception may be where the torque converter clutch

dampener plate lining has seen excess wear by vehicles operated in heavy and/or constant traffic, such as taxi, delivery or police use.

ATF COOLER SERVICE

NFAT0005S03

If A/T fluid contains frictional material (clutches, bands, etc.), replace radiator and flush cooler line using cleaning solvent and compressed air after repair of A/T. Refer to LC-20, “Radiator”.

OBD-II SELF-DIAGNOSIS

NFAT0005S04

쐌 A/T self-diagnosis is performed by the TCM in combination with the ECM. The results can be read through

the blinking pattern of the A/T CHECK indicator lamp or the malfunction indicator lamp (MIL). Refer to the table on AT-43 for the indicator used to display each self-diagnostic result.

쐌 The self-diagnostic results indicated by the MIL are automatically stored in both the ECM and TCM

memories.

Always perform the procedure “HOW TO ERASE DTC” on AT-39 to complete the repair and avoid unnecessary blinking of the MIL.

쐌 The following self-diagnostic items can be detected using ECM self-diagnostic results mode* only when

the A/T CHECK indicator lamp does not indicate any malfunctions.

− park/neutral position (PNP) switch

− A/T 1st, 2nd, 3rd, or 4th gear function

− A/T TCC S/V function (lock-up). *: For details of OBD-II, refer to EC-731, “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”.

쐌 Certain systems and components, especially those related to OBD, may use a new style slide-

locking type harness connector. For description and how to disconnect, refer to EL-7, “Description”.

Wiring Diagrams and Trouble Diagnosis

NFAT0006

When you read wiring diagrams, refer to the following:

쐌 GI-11, “HOW TO READ WIRING DIAGRAMS” 쐌 EL-11, “POWER SUPPLY ROUTING” for power distribution circuit

When you perform trouble diagnosis, refer to the following:

쐌 GI-35, “HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES” 쐌 GI-24, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”

AT-10

Page 15

PREPARATION

Special Service Tools

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Tool number (Kent-Moore No.) Tool name

KV381054S0 (J34286) Puller

ST33400001 (J26082) Drift

(J34301-C) Oil pressure gauge set 1 (J34301-1) Oil pressure gauge 2 (J34301-2) Hoses 3 (J34298) Adapter 4 (J34282-2) Adapter 5 (790-301-1230-A) 60° Adapter 6 (J34301-15) Square socket

ST27180001 (J25726-A) Puller

Description

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

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

NT414

쐌 Installing differential side oil seal 쐌 Installing oil seal on oil pump housing

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

NT086

쐌 Measuring line pressure

AAT896

쐌 Removing idler gear

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

NFAT0007

ST23540000 (J25689-A) Pin punch

ST25710000 (J25689-A) Pin punch

NT424

NT442

NT410

AT-11

쐌 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.

쐌 Aligning groove of manual shaft and hole of

transmission case

a: 2 mm (0.08 in) dia.

IDX

Page 16

Special Service Tools (Cont’d)

Tool number (Kent-Moore No.) Tool name

Description

PREPARATION

KV32101000 (J25689-A) Pin punch

KV31102400 (J34285 and J34285-87) Clutch spring compressor

KV40100630 (J26092) Drift

ST30720000 (J25405 and J34331) Bearing installer

쐌 Removing and installing manual shaft retaining

쐌 Removing and installing pinion mate shaft lock

a: 4 mm (0.16 in) dia.

NT410

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

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

NT423

쐌 Installing reduction gear bearing inner race 쐌 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

쐌 Installing idler gear bearing outer race

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

ST35321000 (—) Drift

(J34291-A) Shim setting gauge set

ST33230000 (J25805-01) Drift

NT115

쐌 Installing output shaft bearing

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

NT073

쐌 Selecting oil pump cover bearing race and oil

pump thrust washer

쐌 Selecting side gear thrust washer

NT101

쐌 Installing differential side bearing inner race

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

NT084

AT-12

Page 17

Tool number (Kent-Moore No.) Tool name

PREPARATION

Special Service Tools (Cont’d)

Description

(J34290) Shim selecting tool set

ST3306S001 (J22888-D) Differential side bearing puller set 1 ST33051001 (J22888-D) Puller 2 ST33061000 (J8107-2) Adapter

ST3127S000 (J25765-A) Preload gauge 1 GG91030000 (J25765-A) Torque wrench 2 HT62940000 (—) Socket adapter 3 HT62900000 (—) Socket adapter

NT080

AMT153

NT124

쐌 Selecting differential side bearing adjusting shim

쐌 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)

쐌 Checking differential side bearing preload

ST35271000 (J26091) Drift

(J39713) Preload adapter

ST30613000 (J25742-3) Drift

NT115

NT087

NT073

쐌 Installing idler gear

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

쐌 Selecting differential side bearing adjusting shim 쐌 Checking differential side bearing preload

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

IDX

AT-13

Page 18

Commercial Service Tools

PREPARATION

Tool name Description Puller

NT077

Puller

NT411

Drift

NT083

Drift

Commercial Service Tools

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

ring

쐌 Removing reduction gear bearing inner race

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

쐌 Installing needle bearing on bearing retainer

a: 36 mm (1.42 in) dia.

쐌 Removing needle bearing from bearing retainer

a: 33.5 mm (1.319 in) dia.

NFAT0008

Drift

Power tool

NT083

쐌 Installing differential side bearing outer race

a: 75 mm (2.95 in) dia.

NT083

쐌 Loosening bolt and nuts

PBIC0190E

AT-14

Page 19

OVERALL SYSTEM

A/T Electrical Parts Location

NFAT0009

AT-15

IDX

SAT487KB

Page 20

Circuit Diagram

OVERALL SYSTEM

Circuit Diagram

NFAT0010

AT-16

MAT283B

Page 21

OVERALL SYSTEM

Cross-sectional View

NFAT0011

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

15. Idler gear

16. Forward one-way clutch

17. Pinion reduction gear

18. Final gear

19. Differential case

20. Input shaft

21. Torque converter

22. Side cover

SAT488K

IDX

AT-17

Page 22

Hydraulic Control Circuit

OVERALL SYSTEM

Hydraulic Control Circuit

NFAT0012

AT-18

SAT489K

Page 23

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

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

NFAT0013

NFAT0013S01

SAT998I

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.

NFAT0013S02

IDX

AT-19

Page 24

Shift Mechanism (Cont’d)

OVERALL SYSTEM

CLUTCH AND BAND CHART

For-

ward

one-

way

clutch

2nd

apply

Band servo

3rd

release

4th

apply

Reverse

Shift position

R 쎻 쎻

D*4

clutch

1st 쎻 *1D B B

2nd 쎻 *1 A 쎻 B

3rd 쎻쎻*1 A *2C C B *1쎻 4th 쎻 C *3C C 쎻쎻 1st 쎻쎻 BB

2nd 쎻쎻쎻 B

3rd 쎻쎻쎻*2C C B

High

clutch

For-

ward

clutch

Over-

run

clutch

Low

one-

way

clutch

Low &

reverse

brake

NFAT0013S03

Lock-up Remarks

PARK POSI-

TION

REVERSE POSITION

NEUTRAL POSITION

Automatic

shift

1 k 2 k 3

k 4

Automatic

shift

1 k 2 g 3

1st 쎻쎻 B 쎻

2nd 쎻쎻쎻 B

3rd 쎻쎻쎻*2C C B

*1: Operates when selector lever is set in 3rd 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 selector lever is set in 3rd position. 쎻: Operates A: Operates when throttle opening is less than 3.0/16, activating engine brake. B: Operates during “progressive” acceleration. C: Operates but does not affect power transmission. D: Operates when throttle opening is less than 3.0/16, but does not affect engine brake.

Locks (held

stationary) in

1st speed

1 g 2 g 3

AT-20

Page 25

OVERALL SYSTEM

Shift Mechanism (Cont’d)

POWER TRANSMISSION P and N Positions

쐌 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.

쐌 N position

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

=NFAT0013S04

NFAT0013S0401

SAT991I

AT-21

IDX

Page 26

Shift Mechanism (Cont’d)

OVERALL SYSTEM

11Position

쐌 Forward clutch 쐌 Forward one-way clutch 쐌 Overrun clutch 쐌 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.

=NFAT0013S0402

AT-22

SAT714KB

Page 27

OVERALL SYSTEM

Shift Mechanism (Cont’d)

D1and 21Positions

쐌 Forward one-way clutch 쐌 Forward clutch 쐌 Low one-way clutch

Overrun clutch

engagement conditions (Engine brake)

=NFAT0013S0403

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

: Selector lever is set in 3rd position and throttle opening is less than 3.0/16

: Always engaged

At D

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

clutch.

AAT532A

AT-23

IDX

Page 28

Shift Mechanism (Cont’d)

OVERALL SYSTEM

D2,22and 12Positions

쐌 Forward clutch 쐌 Forward one-way clutch 쐌 Brake band

Overrun clutch

engagement conditions

=NFAT0013S0404

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.

: Selector lever is set in 3rd position and throttle opening is less than 3.0/16

, and 12: Always engaged

AT-24

AAT533A

Page 29

OVERALL SYSTEM

Shift Mechanism (Cont’d)

D3,23and 13Position

쐌 High clutch 쐌 Forward clutch 쐌 Forward one-way clutch

Overrun clutch

engagement conditions

=NFAT0013S0405

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.

: Selector lever is set in 3rd position and throttle opening is less than 3.0/16

and 13: Always engaged.

AAT534A

AT-25

IDX

Page 30

Shift Mechanism (Cont’d)

OVERALL SYSTEM

D4Position

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

power transmission.)

Engine brake At D

=NFAT0013S0406

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

brake can be obtained when decelerating.

AT-26

AAT536A

Page 31

OVERALL SYSTEM

Shift Mechanism (Cont’d)

R Position

쐌 Reverse clutch 쐌 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.

=NFAT0013S0407

AAT535A

AT-27

IDX

Page 32

Control System

OVERALL SYSTEM

Control System

OUTLINE

=NFAT0014

NFAT0014S01

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 (OR SIGNALS)

Park/neutral position (PNP) switch Accelerator pedal position sensor Closed throttle position signal Wide-open throttle position signal Engine speed signal A/T fluid temperature sensor Revolution sensor (VHCL/S SE-1) Vehicle speed sensor (VHCL/S SE-2) 3rd position switch ASCD control unit Stop lamp switch Power train revolution sensor

CONTROL SYSTEM

Shift control Line pressure control Lock-up control

왘

Overrun clutch control Timing control Fail-safe control Self-diagnosis CAN communication line control

TCM

ACTUATORS

Shift solenoid valve A Shift solenoid valve B

왘

Overrun clutch solenoid valve Torque converter clutch solenoid valve Line pressure solenoid valve A/T CHECK indicator lamp

NFAT0014S02

AT-28

SAT727KA

Page 33

OVERALL SYSTEM

Control System (Cont’d)

TCM FUNCTION

The function of the TCM is to:

쐌 Receive input signals sent from various switches and sensors. 쐌 Determine required line pressure, shifting point, lock-up operation, and engine brake operation. 쐌 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.

Detects accelerator pedal position as throttle valve position signal, and sends a signal from ECM to TCM.

Detects throttle valve’s fully-closed position and sends a signal from ECM to TCM.

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

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

Input

Accelerator pedal position sensor

Closed throttle position signal

Wide-open throttle position signal

Engine speed signal From ECM. A/T fluid temperature sensor Detects transmission fluid temperature and sends a signal to TCM. Revolution sensor (VHCL/S SE-1) Detects output shaft rpm and sends a signal to TCM. Vehicle speed sensor (VHCL/S

SE-2)

=NFAT0014S03

NFAT0014S04

Output

3rd position switch Sends a signal, which prohibits a shift to D position, to the TCM. Power train revolution sensor Detects forward clutch drum rpm and sends a signal to TCM. 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

A/T CHECK indicator lamp Shows TCM faults, when A/T control components malfunction.

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.

(lock-up).

CAN Communication

SYSTEM DESCRIPTION

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication

NFAT0284

NFAT0284S01

IDX

AT-29

Page 34

CAN Communication (Cont’d)

OVERALL SYSTEM

lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

For A/T Models

System Diagram

Input/Output Signal Chart T: Transmit R: Receive

Signals ECM TCM Accelerator pedal position signal T R Output shaft revolution signal R T

For TCS Models

System Diagram

NFAT0284S0101

SEL448Y

NFAT0284S0102

Input/Output Signal Chart T: Transmit R: Receive

Signals ECM ABS/TCS control unit TCM Accelerator pedal position signal T R R Output shaft revolution signal R T TCS self-diagnostic signal R T ABS self-diagnostic signal R T

AT-30

SEL449Y

Page 35

OVERALL SYSTEM

Control Mechanism

SAT003J

Control Mechanism

LINE PRESSURE CONTROL

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

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

Back-up Control (Engine brake)

If the selector lever is shifted to 2nd position while driving in D (O/D) or D3, great driving force is applied to the clutch inside the transmission. Clutch operating pressure (line pressure) must be increased to deal with this driving force.

=NFAT0015

NFAT0015S01

NFAT0015S0101

NFAT0015S0102

SAT004J

SAT005J

During Shift Change

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

쐌 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.

NFAT0015S0103

NFAT0015S0104

IDX

AT-31

Page 36

Control Mechanism (Cont’d)

OVERALL SYSTEM

쐌 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.

SAT006J

쐌 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 accelerator pedal position sensor (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

NFAT0015S02

NFAT0015S0201

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)

1,21,11

D2,22,1

AT-32

Gear position

D4(O/D) N-P

Page 37

OVERALL SYSTEM

Control Mechanism (Cont’d)

Control of Shift Valves A and B

NFAT0015S0202

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

NFAT0015S03

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

NFAT0015S0301

When vehicle is driven in 3rd or 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.

Selector lever D position 3rd position Gear position D Vehicle speed sensor More than set value Accelerator pedal position sensor

(Throttle position sensor) Closed throttle position switch OFF A/T fluid temperature sensor More than 40°C (104°F)

Less than set opening

Torque Converter Clutch Solenoid Valve Control

NFAT0015S0302

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.

IDX

SAT010J

AT-33

Page 38

Control Mechanism (Cont’d)

SAT011J

OVERALL SYSTEM

OFF-time INCREASING

Amount of drain DECREASING

Pilot pressure HIGH

Lock-up RELEASING

Torque Converter Clutch Control Valve Operation

NFAT0015S0303

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.

NFAT0015S04

Overrun Clutch Operating Conditions

Selector lever position Gear position Throttle opening D position D 2nd position 2 1st position 1

1,D2,D3

gear position Less than 3.0/16

gear position

1,22

gear position

1,12

AT-34

NFAT0015S0401

At any position

Page 39

OVERALL SYSTEM

Control Mechanism (Cont’d)

SAT015J

SAT014JA

Overrun Clutch Solenoid Valve Control

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

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 1st and 2nd positions, the overrun clutch control valve remains pushed down so that the overrun clutch is engaged at all times.

NFAT0015S0402

NFAT0015S0403

SAT016JD

FUNCTION OF CONTROL VALVES

Valve name Function

Pressure regulator valve, plug and sleeve plug

Pressure modifier valve and sleeve

Control Valve

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

Used as a signal supplementary valve to the pressure regulator valve. Regulates pressure-modifier pressure (signal pressure) which controls optimum line pressure for all driving conditions.

NFAT0016

NFAT0016S01

AT-35

IDX

Page 40

Control Valve (Cont’d)

Valve name Function

OVERALL SYSTEM

Pilot valve

Accumulator control valve Regulates accumulator back-pressure to pressure suited to driving conditions.

Manual valve

Shift valve A

Shift valve B

Overrun clutch control valve

“1” reducing valve

Overrun clutch reducing valve

Regulates line pressure to maintain a constant pilot pressure level which controls lock-up mechanism, overrun clutch, shift timing.

Directs line pressure to oil circuits corresponding to select positions. Hydraulic pressure drains when the shift lever is in Neutral.

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.

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.

Switches hydraulic circuits to prevent engagement of the overrun clutch simultaneously with application of the brake band in D overrun clutch engages during D

Reduces low & reverse brake pressure to dampen engine-brake shock when down-shifting from the 1st position 1

Reduces oil pressure directed to the overrun clutch and prevents engine-brake shock. In 1st and 2nd positions, line pressure acts on the overrun clutch reducing valve to increase the pressure-regulating point, with resultant engine brake capability.

to 11.

. (Interlocking occurs if the

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

3-2 timing valve

Shuttle valve

Cooler check valve

Activates or inactivates the lock-up function. Also provides smooth lock-up through transient application and release of the lock-up system.

Dampens the shock encountered when 2nd gear band servo contracts, and provides smooth shifting.

Switches the pace that oil pressure is released depending on vehicle speed; maximizes the high clutch release timing, and allows for soft down shifting.

Determines if the overrun clutch solenoid valve should control the 3-2 timing valve or the overrun clutch control valve and switches between the two.

At low speeds and with a small load when little heat is generated, saves the volume of cooler flow, and stores the oil pressure for lock up.

AT-36

Page 41

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Introduction

The A/T system has two self-diagnostic systems. The first is the emission-related on board diagnostic system (OBD-II) performed by the TCM (transmission control module) in combination with the ECM. The malfunction is indicated by the MIL (malfunction indicator lamp) 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 A/T CHECK indicator lamp. The malfunction is stored in the TCM memory. The detected items are overlapped with OBD-II self-diagnostic items. For detail, refer to AT-43.

OBD-II Function for A/T System

The ECM provides emission-related on board diagnostic (OBD-II) 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 OBD-related part. The other function is to indicate a diagnostic result by means of the MIL (malfunction indicator lamp) on the instrument panel. Sensors, switches and solenoid valves are used as sensing elements. The MIL 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 OBD-II

ONE TRIP DETECTION LOGIC

If a malfunction is sensed during the first test drive, the MIL 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

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 MIL 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 MIL will illuminate. — Second Trip A/T-related parts for which the MIL illuminates during the first or second test drive are listed below.

MIL

Items

One trip detection Two trip detection

NFAT0017

NFAT0018

NFAT0019

NFAT0019S01

NFAT0019S02

Shift solenoid valve A — DTC: P0750 X Shift solenoid valve B — DTC: P0755 X Accelerator pedal position sensor (Throttle position sensor) or

switch — DTC: P1705 Except above X

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

OBD-II Diagnostic Trouble Code (DTC)

HOW TO READ DTC AND 1ST TRIP DTC

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.)

쐌 1st trip DTC No. is the same as DTC No. 쐌 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 in the following page. DTC or 1st trip DTC of a malfunction is displayed in “SELF DIAGNOSIS” mode for “ENGINE” with CONSULT-II. Time data indicates how many times the vehicle was driven after the last detection of a DTC.

NFAT0020

NFAT0020S01

IDX

AT-37

Page 42

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

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

SAT014K

If the DTC is being detected currently, the time data will be “0”.

SAT015K

If a 1st trip DTC is stored in the ECM, the time data will be “1t”.

SAT016K

Freeze Frame Data and 1st Trip Freeze Frame Data

NFAT0020S0101

The ECM has a memory function, which stores the driving condition such as fuel system status, calculated load value, engine coolant temperature, short term fuel trim, long term fuel trim, engine speed and vehicle speed at the moment the ECM detects a malfunction. Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data, and the data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II or GST. The 1st trip freeze frame data can only be displayed on the CONSULT-II screen, not on the GST. For detail, refer to EC-101, “CONSULT-II”. Only one set of freeze frame data (either 1st trip freeze frame data of freeze frame data) can be stored in the ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no priority for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once freeze frame data (2nd trip detection/MIL on) is stored in the ECM memory, 1st trip freeze frame data is no longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the following priorities to update the data.

AT-38

Page 43

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Priority Items

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

Freeze frame data

2 Except the above items (Includes A/T related items) 3 1st trip freeze frame data

Both 1st trip freeze frame data and freeze frame data (along with the DTCs) are cleared when the ECM memory is erased.

HOW TO ERASE DTC

The diagnostic trouble code can be erased by CONSULT-II, GST or ECM DIAGNOSTIC TEST MODE as described following.

쐌 If the battery terminal is disconnected, the diagnostic trouble code will be lost within 24 hours. 쐌 When you erase the DTC, using CONSULT-II or GST is easier and quicker than switching the mode

selector on the ECM.

The following emission-related diagnostic information is cleared from the ECM memory when erasing DTC related to OBD-II. For details, refer to EC-77, “Emission-related Diagnostic Information”.

쐌 Diagnostic trouble codes (DTC) 쐌 1st trip diagnostic trouble codes (1st trip DTC) 쐌 Freeze frame data 쐌 1st trip freeze frame data 쐌 System readiness test (SRT) codes 쐌 Test values

HOW TO ERASE DTC (WITH CONSULT-II)

쐌 If a DTC is displayed for both ECM and TCM, it needs to be erased for both ECM and TCM.

1. If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10 seconds and then turn it ON (engine stopped) again.

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

3. Touch “SELF-DIAG RESULTS”.

4. Touch “ERASE”. (The DTC in the TCM will be erased.) Then touch “BACK” twice.

5. Touch “ENGINE”.

6. Touch “SELF DIAGNOSIS”.

7. Touch “ERASE”. (The DTC in the ECM will be erased.)

Misfire — DTC: P0300 - P0306 Fuel Injection System Function — DTC: P0171, P0172, P0174, P0175

NFAT0020S02

NFAT0020S03

AT-39

IDX

Page 44

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

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

SCIA5586E

HOW TO ERASE DTC (WITH GST)

NFAT0020S04

1. If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10 seconds and then turn it ON (engine stopped) again.

2. Perform “TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)”. Refer to AT-53. (The engine warm-up step can be skipped when performing the diagnosis only to erase the DTC.)

3. Select Mode 4 with Generic Scan Tool (GST). For details, refer to EC-116, “Generic Scan Tool (GST)”.

HOW TO ERASE DTC (NO TOOLS)

NFAT0020S05

1. If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10 seconds and then turn it ON (engine stopped) again.

2. Perform “TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)”. Refer to AT-53. (The engine warm-up step can be skipped when performing the diagnosis only to erase the DTC.)

3. Perform “OBD-II SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)”. Refer to AT-53.

AT-40

Page 45

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL)

SAT964I

Malfunction Indicator Lamp (MIL)

1. The malfunction indicator lamp will light up when the ignition switch is turned ON without the engine running. This is for checking the lamp.

쐌 If the malfunction indicator lamp does not light up, refer to

EL-140, “WARNING LAMPS”. [Or see EC-92, “Malfunction indicator lamp (MIL)” and EC-101, “CONSULT-II”.]

2. When the engine is started, the malfunction indicator lamp should go off. If the lamp remains on, the on board diagnostic system has detected an emission-related (OBD-II) malfunction. For detail, refer to EC-76, “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”.

CONSULT-II

After performing “SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)” (AT-42), place check marks for results on the “Diagnostic Worksheet”, AT-61. Reference pages are provide following the items.

NOTICE:

1) The CONSULT-II electrically displays shift timing and lock-up timing (that is, operation timing of each solenoid). Check for time difference between actual shift timing and the CONSULT-II display. If the difference is noticeable, mechanical parts (except solenoids, sensors, etc.) may be malfunctioning. Check mechanical parts using applicable diagnostic procedures.

2) Shift schedule (which implies gear position) displayed on CONSULT-II and that indicated in Service Manual may differ slightly. This occurs because of the following reasons:

쐌 Actual shift schedule has more or less tolerance or allowance, 쐌 Shift schedule indicated in Service Manual refers to the point

where shifts start, and

쐌 Gear position displayed on CONSULT-II indicates the point

where shifts are completed.

3) Shift solenoid valve “A” or “B” is displayed on CONSULT-II at the start of shifting. Gear position is displayed upon completion of shifting (which is computed by TCM).

4) Additional CONSULT-II information can be found in the Operation Manual supplied with the CONSULT-II unit.

=NFAT0021

NFAT0022

AT-41

IDX

Page 46

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

FUNCTION

Diagnostic test mode Function Reference page

Work support

Self-diagnostic results Self-diagnostic results can be read and erased quickly. Refer to AT-42 Data monitor Input/Output data in the ECM can be read. Refer to AT-45 CAN diagnostic support

monitor

Function test

DTC work support

TCM part number TCM part number can be read. —

This mode enables a technician to adjust some devices faster and more accurately by following the indications on CONSULT-II.

The results of transmit/receive diagnosis of CAN communication can be read.

Performed by CONSULT-II instead of a technician to determine whether each system is “OK” or “NG”.

Select the operating condition to confirm Diagnostic Trouble Codes.

—

Refer to AT-48

SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)

1. Turn on CONSULT-II and touch “ENGINE” for OBD-II detected items or touch “A/T” for TCM self-diagnosis. If “ENGINE” or “A/T” is not displayed, go to GI-41, “CONSULTII Data Link Connector (DLC) circuit”.

=NFAT0022S11

NFAT0022S01

SAT014K

SAT987J

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.

AT-42

Page 47

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

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

“A/T” “ENGINE”

Park/neutral position (PNP) switch circuit

— PNP SW/CIRC

Revolution sensor

VHCL SPEED SEN·A/T

Vehicle speed signal (from Meter) VHCL SPEED

SEN·MTR A/T 1st gear function

A/T 1ST GR FNCTN

VEH SPD SEN/ CIR AT

—

A/T 1ST GR FNCTN

SELF-DIAGNOSTIC RESULT TEST MODE

TCM self-diagnosis OBD-II (DTC)

Malfunction is detected when ...

Available by A/T CHECK

indicator lamp

쐌 TCM does not receive the cor-

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

쐌 TCM does not receive the proper

voltage signal from the sensor.

쐌 TCM does not receive the proper

voltage signal from the combination meter.

쐌 A/T cannot be shifted to the 1st

gear position even if electrical circuit is good.

— P0705

X P0720

X—

— P0731*1

NFAT0022S02

Available by

malfunction

indicator lamp*2,

“ENGINE” on CON-

SULT-II or GST

A/T 2nd gear function

A/T 2ND GR FNCTN

A/T 3rd gear function

A/T 3RD GR FNCTN

A/T 4th gear function

A/T 4TH GR FNCTN

A/T TCC S/V function (lock-up)

A/T TCC S/V FNCTN

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

T/C clutch solenoid valve

T/C CLUTCH SOL/V

A/T 2ND GR FNCTN

A/T 3RD GR FNCTN

A/T 4TH GR FNCTN

A/T TCC S/V FNCTN

O/R CLUCH SOL/ CIRC

TCC SOLENOID/ CIRC

쐌 A/T cannot be shifted to the 2nd

gear position even if electrical circuit is good.

쐌 A/T cannot be shifted to the 3rd

gear position even if electrical circuit is good.

쐌 A/T cannot be shifted to the 4th

gear position even if electrical circuit is good.

쐌 A/T cannot perform lock-up even

if electrical circuit is good.

쐌 TCM detects an improper volt-

age drop when it tries to operate the solenoid valve.

쐌 TCM detects an improper volt-

age drop when it tries to operate the solenoid valve.

쐌 TCM detects an improper volt-

age drop when it tries to operate the solenoid valve.

쐌 TCM detects an improper volt-

age drop when it tries to operate the solenoid valve.

— P0732*1

— P0733*1

— P0734*1

— P0744*1

X P0750

X P0755

X P1760

X P0740

IDX

Line pressure solenoid valve

LINE PRESSURE S/V

L/PRESS SOL/ CIRC

쐌 TCM detects an improper volt-

age drop when it tries to operate the solenoid valve.

AT-43

X P0745

Page 48

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

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

“A/T” “ENGINE”

Accelerator pedal position sensor THROTTLE POSI SEN TP SEN/CIRC A/T Engine speed signal

ENGINE SPEED SIG

A/T fluid temperature sensor BATT/FLUID TEMP

SEN CAN communication*3

CAN COMM CIRCUIT

Power train revolution sensor TURBINE REV —

ENGINE SPEED

SIG

ATF TEMP SEN/ CIRC

CAN COMM CIRCUIT

Malfunction is detected when ...

쐌 TCM receives an excessively

low or high voltage from the sensor.

쐌 TCM does not receive the proper

voltage signal from the ECM.

쐌 TCM receives an excessively

low or high voltage from the sensor.

쐌 When malfunction is detected in

CAN communication line.

쐌 TCM does not receive the proper

voltage signal from the sensor.

TCM self-diagnosis OBD-II (DTC)

Available by

Available by A/T CHECK

indicator lamp

X P1705

X P0725

X P0710

X U1000

X—

malfunction

indicator lamp*2,

“ENGINE” on CON-

SULT-II or GST

TCM (RAM) CONTROL UNIT

(RAM) TCM (ROM) CONTROL UNIT

(ROM) TCM (EEP ROM) CONT UNIT

(EEP ROM)

Initial start

INITIAL START —

No failure (NO SELF DIAGNOSTIC FAILURE INDICATED FURTHER TESTING MAY BE REQUIRED**)

X: Applicable

−: Not applicable *1: These malfunctions cannot be displayed by MIL *2: Refer to EC-92, “Malfunction Indicator Lamp (MIL)”. *3: If malfunction is detected in multiple systems including CAN communication line, CAN communication line trouble diagnosis shall

be performed first.

—

쐌 TCM memory (RAM) is malfunc-

tioning

쐌 TCM memory (ROM) is malfunc-

tioning

쐌 TCM memory (EEP ROM) is

malfunctioning.

쐌 This is not a malfunction mes-

sage (Whenever shutting off a power supply to the TCM, this message appears on the screen.)

쐌 No failure has been detected. X X

if another malfunction is assigned to MIL.

——

X—

AT-44

Page 49

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

Item Display

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

Vehicle speed sensor 2 (Meter)

Accelerator pedal position sensor

A/T fluid temperature sensor

Battery voltage BATTERY VOLT

Engine speed ENGINE

Power train revolution sensor

3rd position switch OVERDRIVE

VHCL/S SE·A/T [km/h] or [mph]

VHCL/S SE·MTR [km/h] or [mph]

THRTL POS SEN [V]

FLUID TEMP SE [V]

[V]

SPEED [rpm]

TURBINE REV [rpm]

SW [ON/OFF]

DATA MONITOR MODE (A/T)

SELECT MONITOR ITEM

TCM

INPUT

SIGNALS

X—왔

XX왔

X—왔

MAIN

SIGNALS

SELEC-

TION FROM MENU

Description Remarks

쐌 Vehicle speed com-

puted from signal of revolution sensor is displayed.

쐌 Vehicle speed com-

puted from signal of vehicle speed signal is displayed.

쐌 Accelerator pedal

position sensor signal voltage is displayed.

쐌 A/T fluid temperature

sensor signal voltage is displayed.

쐌 Signal voltage lowers

as fluid temperature rises.

쐌 Source voltage of

TCM is displayed.

쐌 Engine speed, com-

puted from engine speed signal, is displayed.

쐌 This sensor checks

the changing speed then perform the oil pressure control and the torque down control.

쐌 ON/OFF status, com-

puted from signal of 3rd position switch, is displayed.

When racing engine in “N” or “P” position 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.

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

Error may occur under approx. 800 rpm and will not indicate 0 rpm even if engine is not running.

NFAT0022S03

PN position (PNP) switch

R position switch R POSITION

D position switch D POSITION

PN POSI SW [ON/OFF]

SW [ON/OFF]

X—왔

AT-45

쐌 ON/OFF status, com-

puted from signal of PN position switch, is displayed.

쐌 ON/OFF status, com-

puted from signal of R position switch, is displayed.

쐌 ON/OFF status, com-

puted from signal of D position switch, is displayed.

IDX

Page 50

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

SELECT MONITOR ITEM

Item Display

2 position switch 2 POSITION

SW [ON/OFF]

1 position switch 1 POSITION

SW [ON/OFF]

ASCD cruise signal ASCD-CRUISE

[ON/OFF]

ASCD OD cut signal ASCD-OD CUT

[ON/OFF]

Kickdown switch KICKDOWN

SW [ON/OFF]

TCM

INPUT

SIGNALS

X—왔

MAIN

SIGNALS

SELEC-

TION FROM MENU

Description Remarks

쐌 ON/OFF status, com-

puted from signal of 2 position switch, is displayed.

쐌 ON/OFF status, com-

puted from signal of 1 position switch, is displayed.

쐌 Status of ASCD

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

쐌 Status of ASCD OD

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

쐌 ON/OFF status, com-

puted from signal of kickdown switch, 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 POWER SHIFT

SW [ON/OFF]

Closed throttle position signal

Wide open throttle position signal

Shift solenoid valve A *SHIFT S/V A

Shift solenoid valve B *SHIFT S/V B

Overrun clutch solenoid valve

A/T mode switch HOLD SW

CLOSED THL/SW [ON/OFF] X — 왔

W/O THRL/ P-SW [ON/OFF] X — 왔

[ON/OFF]

[ON/OFF] *OVRRUN/C

S/V [ON/OFF]

[ON/OFF]

X—왔

——왔

X—왔

쐌 ON/OFF status, com-

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

쐌 ON/OFF status, com-

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

쐌 Displays status of

check signal (re-input signal) for TCM control signal output. Remains unchanged when solenoid valves are open or shorted.

Not mounted but displayed.

This means closed throttle position signal input via CAN communication line.

This means wide open throttle position signal input via CAN communication line.

Not mounted but displayed.

AT-46

Page 51

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

SELECT MONITOR ITEM

CONSULT-II (Cont’d)

Item Display

Stop lamp switch BRAKE SW

[ON/OFF]

Gear position GEAR

Selector lever position SLCT LVR

POSI

Vehicle speed VEHICLE

SPEED [km/h] or [mph]

Throttle position THROTTLE

POSI [/8]

TCM

INPUT

SIGNALS

X—왔

—X왔

MAIN

SIGNALS

SELEC-

TION FROM MENU

Description Remarks

쐌 ON/OFF status is dis-

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

쐌 Gear position data

used for computation by TCM, is displayed.

쐌 Selector lever position

data, used for computation by TCM, is displayed.

쐌 Vehicle speed data,

used for computation by TCM, is displayed.

쐌 Throttle position data,

used for computation by TCM, is displayed.

A specific value used for control is displayed if fail-safe is activated due to error.

Line pressure duty LINE PRES

DTY [%] — X 왔

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

TCC S/V DUTY [%]

[ON/OFF]

OVERRUN/C S/V [ON/OFF] — X 왔

—X왔

쐌 Control value of line

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

쐌 Control value of

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

쐌 Control value of shift

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

쐌 Control value of shift

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

쐌 Control value of over-

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

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

Self-diagnosis display lamp (A/T CHECK indicator lamp)

SELF-D DP LMP [ON/OFF]

—X왔

AT-47

쐌 Control status of A/T

CHECK indicator lamp is displayed.

IDX

Page 52

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

SELECT MONITOR ITEM

Item Display

Torque converter slip ratio

Torque converter slip speed

Voltage Voltage

Frequency Frequency

TC SLIP RATIO [0.000]

TC SLIP SPEED [rpm] — — 왔

[V] — — 왔

[Hz]

TCM

INPUT

SIGNALS

——왔

MAIN

SIGNALS

SELEC-

TION FROM MENU

Description Remarks

쐌 Ratio of engine revo-

lution to input shaft revolution of torque converter

쐌 Difference in revolu-

tion between input shaft revolution and input shaft revolution of torque converter

쐌 Value measured by

voltage probe is displayed.

쐌 Value measured by

pulse probe is displayed. If measurement is impossible, “#” sign is displayed. “#” sign is also displayed at the final data value until the measurement result is obtained.

Display doesn’t indicate 0 rpm even if engine is stopped. But this isn’t malfunction.

Duty cycle (high) DUTY-HI

[%]

Duty cycle (low) DUTY-LOW

[%]

Plus width (high) PLS WIDTH-HI

[msec]

Plus width (low) PLS WIDTH-

LOW [msec]

X: Applicable —: Not applicable 왔: Option

——왔

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

쐌 Duty cycle value for

measurement probe is displayed.

쐌 Measured pulse width

of measurement probe is displayed.

NFAT0022S04

NFAT0022S0401

1. Turn ignition switch OFF.

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

SAT585J

AT-48

Page 53

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

3. Turn ignition switch ON.

4. Touch “START (NISSAN BASED VHCL)”.

CONSULT-II (Cont’d)

SAIA0450E

SAT014K

SCIA5358E

5. Touch “A/T”. If “A/T” is not indicated, go to GI-41, “CONSULT-II Data Link Connector (DLC) Circuit”.

6. Touch “DTC WORK SUPPORT”.

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

SAT018K

SAT589J

8. Touch “START”.

AT-49

IDX

Page 54

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

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

SAT019K

쐌 When testing conditions are satisfied, CONSULT-II screen

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

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-50

Page 55

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

12. Touch “YES” or “NO”.

CONSULT-II (Cont’d)

SAT595J

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

SAT596J

SAT593J

DTC WORK SUPPORT MODE

DTC work support item Description Check item

NFAT0022S05

1ST GR FNCTN P0731

2ND GR FNCTN P0732

3RD GR FNCTN P0733

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

ducted or not)

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

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

ducted or not)

쐌 Self-diagnosis result (OK or NG) Following items for “A/T 3rd gear function (P0733)” can be con-

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

ducted or not)

쐌 Self-diagnosis result (OK or NG)

AT-51

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

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

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

IDX

Page 56

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

DTC work support item Description Check item

4TH GR FNCTN P0734

TCC S/V FNCTN P0744

Following items for “A/T 4th gear function (P0734)” can be confirmed. 쐌 Self-diagnosis status (whether the diagnosis is being con-

ducted or not)

쐌 Self-diagnosis result (OK or NG)

Following items for “A/T TCC S/V function (lock-up) (P0744)” can be confirmed. 쐌 Self-diagnosis status (whether the diagnosis is being con-

ducted or not)

쐌 Self-diagnosis result (OK or NG)

쐌 Shift solenoid valve A 쐌 Shift solenoid valve B 쐌 Overrun clutch solenoid valve 쐌 Line pressure solenoid valve 쐌 Each clutch 쐌 Hydraulic control circuit

쐌 Torque converter clutch sole-

noid valve

쐌 Each clutch 쐌 Hydraulic control circuit

AT-52

Page 57

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II

OBD-II SELF-DIAGNOSTIC PROCEDURE (WITH GST)

Refer to EC-116, “Generic Scan Tool (GST)”.

OBD-II SELF-DIAGNOSTIC PROCEDURE (NO

TOOLS)

Refer to EC-92, “Malfunction Indicator Lamp (MIL)”.

TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)

1 CHECK A/T CHECK 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.)

=NFAT0023

NFAT0023S01

NFAT0023S02

NFAT0023S03

5. Does A/T CHECK indicator lamp come on for about 2 seconds?

YesorNo

Yes 䊳 GO TO 2. No 䊳 Stop procedure. Perform “A/T CHECK Indicator Lamp Does Not Come On”, AT-224

before proceeding.

SAT491K

SAT492K

AT-53

IDX

Page 58

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. Turn ignition switch to ACC position.

3. Depress and hold accelerator pedal fully. Depress brake pedal, then move selector lever from P to D position.

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

5. Wait 3 seconds.

6. Move selector lever to 2nd position.

7. Release accelerator pedal and brake pedal.

SAT493K

䊳 GO TO 3.

3 JUDGEMENT PROCEDURE STEP 2

1. Move selector lever to 1st position.

2. Depress brake pedal.

3. Depress accelerator pedal fully and release it.

4. The A/T CHECK indicator lamp will begin to flash ON and OFF.

䊳 GO TO 4.

SAT494K

SAT495K

AT-54

Page 59

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

4 CHECK SELF-DIAGNOSTIC CODE

Check A/T CHECK indicator lamp. Refer to JUDGEMENT OF SELF-DIAGNOSIS CODE, AT-56.

Diagnostic Procedure Without CONSULT-II (Cont’d)

䊳 DIAGNOSIS END

SAT492K

AT-55

IDX

Page 60

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

JUDGEMENT OF SELF-DIAGNOSIS CODE

A/T CHECK indicator lamp:

All judgement flickers are the same.

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

2nd judgement flicker is longer than others.

SAT518K

=NFAT0023S04

1st judgement flicker is longer than others.

SAT543K

Revolution sensor circuit is short-circuited or disconnected.

⇒ Go to VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR), AT-121.

3rd judgement flicker is longer than others.

SAT544K

Vehicle speed sensor circuit is short-circuited or disconnected.

⇒ Go to VEHICLE SPEED SENSOR·MTR, AT-208.

4th judgement flicker is longer than others.

SAT546K

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

⇒ Go to SHIFT SOLENOID VALVE A, AT-179.

SAT545KC

Accelerator pedal position sensor (throttle position sensor) circuit is short-circuited or disconnected.

⇒ GO TO ACCELERATOR PEDAL POSITION SENSOR (THROTTLE POSITION SENSOR), AT-189.

5th judgement flicker is longer than others.

SAT547K

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

⇒ Go to SHIFT SOLENOID VALVE B, AT-184.

AT-56

Page 61

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

A/T CHECK indicator lamp:

6th judgement flicker is longer than others.

SAT548K

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

⇒ Go to OVERRUN CLUTCH SOLENOID VALVE, AT-196.

8th judgement flicker is longer than others.

7th judgement flicker is longer than others.

SAT549K

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

⇒ Go to TORQUE CONVERTER CLUTCH SOLENOID VALVE, AT-158.

9th judgement flicker is longer than others.

SAT550K

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-201.

10th judgement flicker is longer than others.

SAT552K

Power train revolution circuit is short-circuited or disconnected.

⇒ Go to POWER TRAIN REVOLUTION SENSOR, AT-213.

SAT551K

Engine speed signal circuit is short-circuited or disconnected.

⇒ Go to ENGINE SPEED SIGNAL, AT-126.

11th judgement flicker is longer than others.

SAT553K

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

⇒ Go to LINE PRESSURE SOLENOID VALVE, AT-173.

AT-57

IDX

Page 62

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

A/T CHECK indicator lamp:

12th judgement flicker is longer than others.

CAN communication line is damaged.

⇒ Go to CAN COMMUNICATION LINE, AT-105.

Flickers as shown below.

SAT554K

Lamp comes off.

SAT555K

Park/neutral position (PNP) switch, 3rd position switch, closed throttle position signal or wide-open throttle position signal circuit is disconnected or TCM is damaged.

⇒ Go to TCM Self-diagnosis Does Not Activate, AT-267.

SAT556K

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.)

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

AT-58

Page 63

TROUBLE DIAGNOSIS — INTRODUCTION

Introduction

SAT631IA

SAT632I

Introduction

The TCM receives a signal from the vehicle speed sensor, electric throttle control actuator (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 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-63. 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-60) 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.

NFAT0024

SEF234G

IDX

AT-59

Page 64

Introduction (Cont’d)

TROUBLE DIAGNOSIS — INTRODUCTION

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 쏔 Continuous 쏔 Intermittent ( times a day) Symptoms 쏔 Vehicle does not move. (쏔 Any position 쏔 Particular position)

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

=NFAT0024S01

NFAT0024S0101

쏔 No pattern select 쏔 Others

()

A/T CHECK indicator lamp Blinks for about 8 seconds.

쏔 Continuously lit 쏔 Not lit

Malfunction indicator lamp (MIL) 쏔 Continuously lit 쏔 Not lit

AT-60

Page 65

TROUBLE DIAGNOSIS — INTRODUCTION

Introduction (Cont’d)

Diagnostic Worksheet

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

2. 쏔 Check A/T fluid AT-65

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

3. 쏔 Perform STALL TEST and LINE PRESSURE TEST. AT-65, 69

쏔 Stall test — Mark possible damaged components/others.

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

쏔 Line pressure test — Suspected parts:

4. 쏔 Perform all ROAD TEST and mark required procedures. AT-70

4-1. Check before engine is started. AT-71

쏔 A/T CHECK Indicator Lamp Does Not Come On, AT-224. 쏔 SELF-DIAGNOSTIC PROCEDURE - Mark detected items.

쏔 Park/neutral position (PNP) switch, AT-109. 쏔 A/T fluid temperature sensor, AT-115. 쏔 Vehicle speed sensor·A/T (Revolution sensor), AT-121. 쏔 Engine speed signal, AT-126. 쏔 Power train revolution sensor, AT-213. 쏔 Torque converter clutch solenoid valve, AT-158. 쏔 Line pressure solenoid valve, AT-173. 쏔 Shift solenoid valve A, AT-179. 쏔 Shift solenoid valve B, AT-184. 쏔 Accelerator pedal position sensor (throttle position sensor), AT-189. 쏔 Overrun clutch solenoid valve, AT-196. 쏔 Park/neutral position (PNP) & 3rd position switches, closed throttle position signal and wide-open

throttle position signal, AT-267.

쏔 A/T fluid temperature sensor and TCM power source, AT-201. 쏔 Vehicle speed sensor·MTR, AT-208. 쏔 CAN communication line, AT-105. 쏔 Control unit (RAM), Control unit (ROM), AT-218. 쏔 Control unit (EEP ROM), AT-220. 쏔 Battery 쏔 Others

4-2. Check at idle AT-72

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

brake band are OK

=NFAT0024S0102

쏔 Engine Cannot Be Started In P and N Positions, AT-226. 쏔 In P Position, Vehicle Moves Forward or Backward When Pushed, AT-228. 쏔 In N Position, Vehicle Moves, AT-229. 쏔 Large Shock. N , R Position, AT-231. 쏔 Vehicle Does Not Creep Backward In R Position, AT-233. 쏔 Vehicle Does Not Creep Forward In D, 2nd or 1st Position, AT-236.

AT-61

IDX

Page 66

TROUBLE DIAGNOSIS — INTRODUCTION

Introduction (Cont’d)

4. 4-3. Cruise test AT-75

Part-1

AT-78

쏔 Vehicle Cannot Be Started From D 쏔 A/T Does Not Shift: D 쏔 A/T Does Not Shift: D 쏔 A/T Does Not Shift: D

, D2or Does Not Kickdown: D4, D2, AT-242.

, D3, AT-245.

, D4, AT-248.

, AT-239.

쏔 A/T Does Not Perform Lock-up, AT-251. 쏔 A/T Does Not Hold Lock-up Condition, AT-253. 쏔 Lock-up Is Not Released, AT-255. 쏔 Engine Speed Does Not Return To Idle (Light Braking D

, D3), AT-256.

Part-2 AT-82

쏔 Vehicle Does Not Start From D 쏔 A/T Does Not Shift: D 쏔 A/T Does Not Shift: D 쏔 A/T Does Not Shift: D

, D2or Does Not Kickdown: D4, D2, AT-242.

, D3, AT-245.

, D4, AT-248.

, AT-259.

Part-3 AT-84

쏔 A/T Does Not Shift: D 쏔 Engine Speed Does Not Return To Idle (Engine Brake In D 쏔 A/T Does Not Shift: D 쏔 Engine Speed Does Not Return To Idle (Engine Brake In 2 쏔 A/T Does Not Shift: 2

, D3When selector lever is set in D , 3rd Position, AT-260.

, 22, When Selector Lever D , 2nd Position, AT-261.

, 11, When Selector Lever 2nd , 1st Position, AT-262.

), AT-256.

쏔 Vehicle Does Not Decelerate By Engine Brake, AT-265. 쏔 SELF-DIAGNOSTIC PROCEDURE — Mark detected items.

throttle position signal, AT-267.

5. 쏔 For self-diagnosis NG items, inspect each component. Repair or replace the damaged parts. AT-43

6. 쏔 Perform all ROAD TEST and re-mark required procedures. AT-70

7. 쏔 Perform DTC CONFIRMATION PROCEDURE for following MIL indicating items and check out NG items.

EC-77

Refer to EC-77, “Emission-related Diagnostic Information”.

쏔 DTC (P0731) A/T 1st gear function, AT-131. 쏔 DTC (P0732) A/T 2nd gear function, AT-137. 쏔 DTC (P0733) A/T 3rd gear function, AT-143. 쏔 DTC (P0734) A/T 4th gear function, AT-149. 쏔 DTC (P0744) A/T TCC S/V function (lock-up), AT-163.

8. 쏔 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-88 AT-99

symptoms and the component inspection orders.)

9. 쏔 Erase DTC from TCM and ECM memories. AT-39

AT-62

Page 67

TROUBLE DIAGNOSIS — INTRODUCTION

Work Flow

HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR

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-60) and “Diagnostic Worksheet” (AT-61), to perform the best troubleshooting possible.

NFAT0025

NFAT0025S01

AT-63

IDX

Page 68

Work Flow (Cont’d)

TROUBLE DIAGNOSIS — INTRODUCTION

WORK FLOW CHART

=NFAT0025S02

*1: AT-60 *2: AT-61 *3: AT-9 *4: AT-65 *5: AT-65, 69 *6: AT-70

*7: AT-41 *8: AT-37 *9: AT-56 *10: AT-109 *11: AT-220 *12: AT-222

SAT086JI

*13: AT-267 *14: AT-88 *15: AT-39 *16: AT-110 *17: AT-220 *18: EC-77

AT-64

Page 69

TROUBLE DIAGNOSIS — BASIC INSPECTION

A/T Fluid Check

SAT497K

SAT288G

A/T Fluid Check

FLUID LEAKAGE CHECK

NFAT0026

NFAT0026S01

1. Clean area suspected of leaking. — for example, mating surface of converter housing and transmission case.

2. Start engine, apply foot brake, place selector lever in D position and wait a few minutes.

3. Stop engine.

4. Check for fresh leakage.

FLUID CONDITION CHECK

Fluid color Suspected problem

NFAT0026S02

SAT638A

Dark or black with burned odor Wear of frictional material

Milky pink

Varnished fluid, light to dark brown and tacky

FLUID LEVEL CHECK

Water contamination — Road water entering through filler tube or breather

Oxidation — Over or under filling, — Overheating

NFAT0026S03

Refer to MA-21, “Checking A/T Fluid”.

Stall Test

STALL TEST PROCEDURE

NFAT0027

NFAT0027S01

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)

IDX

SAT647B

AT-65

Page 70

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.

쐌 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.

쐌 During test, never hold throttle wide open for more than 5

seconds.

Stall revolution:

2,550 - 3,050 rpm

SAT514G

8. Move selector lever to N position.

9. Cool off ATF.

쐌 Run engine at idle for at least one minute.

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

SAT498K

JUDGEMENT OF STALL TEST

NFAT0027S02

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-64.

NOTE:

Stall revolution is too high in D, 3rd, 2nd or 1st position:

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

Low one-way clutch slippage

쐌 Slippage occurs in the following gears:

1st through 3rd gears in D position and engine brake functions with selector lever set to 3rd position. 1st and 2nd gears in 2nd position and engine brake functions

with accelerator pedal released (fully closed throttle). ..... For-

ward clutch or forward one-way clutch slippage

Stall revolution is too high in R position:

쐌 Engine brake does not function in 1st position. ..... Low &

reverse brake slippage

쐌 Engine brake functions in 1st position. ..... Reverse clutch slip-

page

Stall revolution within specifications:

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

AT-66

Page 71

TROUBLE DIAGNOSIS — BASIC INSPECTION

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

CAUTION:

Be careful since automatic fluid temperature increases abnormally.

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

clutch slippage

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

band slippage

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

position with 3rd position switch set to ON, 2nd gear in 2nd position, and 1st gear in 1st position.

..... Overrun clutch slippage

Stall revolution less than specifications:

쐌 Poor acceleration during starts. ..... One-way clutch slippage in

torque converter

Stall Test (Cont’d)

AT-67

IDX

Page 72

Stall Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

AT-68

SAT499K

Page 73

TROUBLE DIAGNOSIS — BASIC INSPECTION

Line Pressure Test

SAT301FB

SAT647B

Line Pressure Test

LINE PRESSURE TEST PORTS

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

쐌 Always replace pressure plugs as they are self-sealing

bolts.

LINE PRESSURE TEST PROCEDURE

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.

NFAT0028

NFAT0028S01

NFAT0028S02

AAT898

SAT513G

4. Set parking brake and block wheels.

쐌 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.

쐌 When measuring line pressure at stall speed, follow the

stall test procedure.

Line pressure: Refer to SDS, AT-382.

SAT493G

IDX

AT-69

Page 74

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. 쐌 Oil pump wear

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

sure regulator valve

쐌 Clogged strainer

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

particular clutch

쐌 For example, line pressure is:

− Low in R and 1st positions, but

− Normal in D and 2nd 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. 쐌 Maladjustment of accelerator pedal position sensor

(throttle position sensor)

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

NFAT0028S03

At stall speed

Line pressure is low. 쐌 Maladjustment of accelerator pedal position sensor

(throttle position sensor)

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

Road Test

DESCRIPTION

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

A/T and analyze causes of problems.

쐌 The road test consists of the following three parts:

1. Check before engine is started

2. Check at idle

3. Cruise test

SAT786A

쐌 Before road test, familiarize yourself with all test procedures

and items to check.

쐌 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” and “TROUBLE DIAGNOSES FOR SYMPTOMS”, AT-37 to AT-56 and AT-222 to AT-267.

NFAT0029S01

NFAT0029

SAT496G

AT-70

Page 75

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

1. CHECK BEFORE ENGINE IS STARTED

1 CHECK A/T CHECK INDICATOR LAMP

1. Park vehicle on flat surface.

2. Move selector lever to P position.

SAT491K

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 A/T CHECK indicator lamp come on for about 2 seconds?

YesorNo

Yes 䊳 GO TO 2. No 䊳 Stop ROAD TEST. Go to “A/T CHECK Indicator Lamp Does Not Come On”, AT-224.

=NFAT0029S02

2 CHECK A/T CHECK INDICATOR LAMP

Does A/T CHECK indicator lamp flicker for about 8 seconds?

SAT492K

YesorNo

Yes 䊳 TCM is under Fail-safe mode. Perform self-diagnosis and check NG items on the DIAG-

NOSTIC WORKSHEET, AT-60. Refer to SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II), AT-42, or TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS), AT-53.

No 䊳 1. Turn ignition switch to OFF position.

2. Perform self-diagnosis and note NG items. Refer to SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II), AT-42, TCM SELFDIAGNOSTIC PROCEDURE (NO TOOLS), AT-53.

3. Go to “2. CHECK AT IDLE”, AT-72.

AT-71

IDX

Page 76

Road Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

2. CHECK AT IDLE

1 CHECK ENGINE START

1. Park vehicle on flat surface.

2. Move selector lever to P position.

SAT502K

3. Turn ignition switch to OFF position.

4. Turn ignition switch to START position.

5. Is engine started?

YesorNo

Yes 䊳 GO TO 2. No 䊳 Stop ROAD TEST. Mark the box on the DIAGNOSTIC WORKSHEET. Go to “Engine

Cannot Be Started In P and N Position”, AT-226.

NFAT0029S03

2 CHECK ENGINE START

1. Turn ignition switch to ACC position.

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

SAT503K

3. Turn ignition switch to START position.

4. Is engine started?

YesorNo

Yes 䊳 Stop ROAD TEST. Mark the box on the DIAGNOSTIC WORKSHEET. Go to “Engine

Cannot Be Started In P and N Position”, AT-226.

No 䊳 GO TO 3.

AT-72

Page 77

TROUBLE DIAGNOSIS — BASIC INSPECTION

3 CHECK VEHICLE MOVE

1. Move selector lever to P position.

Road Test (Cont’d)

SAT491K

2. Turn ignition switch to OFF position.

3. Release parking brake.

4. Push vehicle forward or backward.

SAT796A

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

6. Apply parking brake.

YesorNo

Yes 䊳 Mark the box of “In P Position, Vehicle Moves Forward Or Backward When Pushed” on

the DIAGNOSTIC WORKSHEET. Continue ROAD TEST.

No 䊳 GO TO 4.

4 CHECK VEHICLE MOVE

1. Start engine.

2. Move selector lever to N position.

3. Release parking brake.

4. Does vehicle move forward or backward?

YesorNo

Yes 䊳 Mark the box of “In N Position, Vehicle Moves” on the DIAGNOSTIC WORKSHEET.

Continue ROAD TEST.

No 䊳 GO TO 5.

AT-73

SAT498K

IDX

Page 78

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

5 CHECK SHIFT SHOCK

1. Apply foot brake.

2. Move selector lever to R position.

SAT797A

SAT506K

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

YesorNo

Yes 䊳 Mark the box of “Large Shock N , R Position” on the DIAGNOSTIC WORKSHEET.

Continue ROAD TEST.

No 䊳 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 䊳 GO TO 7. No 䊳 Mark the box of “Vehicle Does Not Creep Backward In R Position” on the DIAGNOSTIC

WORKSHEET. Continue ROAD TEST.

AT-74

Page 79

TROUBLE DIAGNOSIS — BASIC INSPECTION

7 CHECK VEHICLE MOVE

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

Road Test (Cont’d)

2. Does vehicle creep forward in all three positions?

YesorNo

Yes 䊳 Go to 3. CRUISE TEST, AT-75. No 䊳 Mark the box of “Vehicle Does Not Creep Forward In D, 2nd Or 1st Position” on the

DIAGNOSTIC WORKSHEET. Continue ROAD TEST.

3. CRUISE TEST

쐌 Check all items listed in Parts 1 through 3.

With CONSULT-II

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

as per Shift Schedule.

SAT601J

CONSULT-II Setting Procedure

1. Turn ignition switch OFF.

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

NFAT0029S0401

NFAT0029S0402

SAT507K

NFAT0029S04

SAT585J

SAIA0450E

3. Turn ignition switch ON.

4. Touch “START (NISSAN BASED VHCL)”.

AT-75

IDX

Page 80

Road Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

5. Touch “A/T”. If “A/T” is not indicated, go to GI-41, “CONSULT-II Data Link Connector (DLC) Circuit”.

SAT014K

6. Touch “DATA MONITOR”.

SCIA5358E

SAT175K

SAT973J

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

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

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

10. Touch “Start”.

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

SAT134K

AT-76

Page 81

TROUBLE DIAGNOSIS — BASIC INSPECTION

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

Road Test (Cont’d)

SAT135K

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

SAT331JB

Without CONSULT-II

쐌 Accelerator pedal position sensor (throttle position sensor) can

be checked by voltage between terminals 41 (W) and 42 (B) of TCM.

NFAT0029S0403

AT-77

IDX

Page 82

Road Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

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 selector lever is in D position.

4. Move selector lever to P position.

5. Start engine.

6. Move selector lever to D position.

=NFAT0029S0404

SAT491K

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

8. Does vehicle start from D1?

Read gear position.

YesorNo

Yes 䊳 GO TO 2. No 䊳 Mark the box of “Vehicle Cannot Be Started From D

SHEET. Continue ROAD TEST.

” on the DIAGNOSTIC WORK-

SAT493K

SAT495G

AT-78

Page 83

TROUBLE DIAGNOSIS — BASIC INSPECTION

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-381.

Yes 䊳 GO TO 3. No 䊳 Mark the box of “A/T Does Not Shift: D

DIAGNOSTIC WORKSHEET. Continue ROAD TEST.

to D2:

YesorNo

Road Test (Cont’d)

SAT954I

, D2Or Does Not Kickdown: D4, D2”onthe

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-381.

Yes 䊳 GO TO 4. No 䊳 Mark the box of “A/T Does Not Shift: D

Continue ROAD TEST.

to D3:

YesorNo

, D3” on the DIAGNOSTIC WORKSHEET.

SAT955I

AT-79

IDX

Page 84

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

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-381.

Yes 䊳 GO TO 5. No 䊳 Mark the box of “A/T Does Not Shift: D

Continue ROAD TEST.

to D4:

YesorNo

, D4” on the DIAGNOSTIC WORKSHEET.

SAT956I

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-381.

SAT957I

YesorNo

Yes 䊳 GO TO 6. No 䊳 Mark the box of “A/T Does Not Perform Lock-up” on the DIAGNOSTIC WORKSHEET.

Continue ROAD TEST.

6 CHECK HOLD LOCK-UP

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

YesorNo

Yes 䊳 GO TO 7. No 䊳 Mark the box of “A/T Does Not Hold Lock-up Condition” on the DIAGNOSTIC WORK-

SHEET. Continue ROAD TEST.

AT-80

Page 85

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

7 CHECK SHIFT DOWN (D4L/U TO D4)

1. Release accelerator pedal.

SAT958I

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

YesorNo

Yes 䊳 GO TO 8. No 䊳 Mark the box of “Lock-up Is Not Released” on the DIAGNOSTIC WORKSHEET. Con-

tinue ROAD TEST.

8 CHECK SHIFT DOWN (D4TO D3)

1. Decelerate vehicle by applying foot brake lightly.

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

Read gear position and engine speed.

YesorNo

Yes 䊳 1. Stop vehicle.

2. Go to “Cruise Test — Part 2”, AT-82.

No 䊳 Mark the box of “Engine Speed Does Not Return To Idle (Light Braking D

DIAGNOSTIC WORKSHEET. Continue ROAD TEST.

SAT959I

, D3)” on the

AT-81

IDX

Page 86

Road Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

Cruise Test — Part 2

1 CHECK STARTING GEAR (D1) POSITION

1. Confirm selector lever is in D position.

2. Accelerate vehicle by half throttle again.

3. Does vehicle start from D1?

Read gear position.

YesorNo

Yes 䊳 GO TO 2. No 䊳 Mark the box of “Vehicle Does Not Start From D

Continue ROAD TEST.

=NFAT0029S0405

SAT495G

” on the DIAGNOSTIC WORKSHEET.

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 䊳 GO TO 3. No 䊳 Mark the box of “A/T Does Not Shift: D

, D2Or Does Not Kickdown: D4, D2”onthe

DIAGNOSTIC WORKSHEET. Continue ROAD TEST.

SAT404H

AT-82

Page 87

TROUBLE DIAGNOSIS — BASIC INSPECTION

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-381.

Yes 䊳 GO TO 4. No 䊳 Mark the box of “A/T Does Not Shift: D

Continue ROAD TEST.

to D3:

YesorNo

Road Test (Cont’d)

, D3” on the DIAGNOSTIC WORKSHEET.

SAT960I

4 CHECK SHIFT UP (D3TO D4) AND ENGINE BRAKE

Release accelerator pedal after shifting from D2to D3. Does A/T shift from D

Read gear position, throttle position and vehicle speed.

Yes 䊳 1. Stop vehicle.

No 䊳 Mark the box of “A/T Does Not Shift: D

to D4and does vehicle decelerate by engine brake?

YesorNo

2. Go to “CRUISE TEST — Part 3”, AT-84.

Continue ROAD TEST.

, D4” on the DIAGNOSTIC WORKSHEET.

SAT405H

AT-83

IDX

Page 88

Road Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

1 VEHICLE SPEED (D4) POSITION

1. Confirm selector lever is in D position.

2. Accelerate vehicle using half-throttle to D

3. Release accelerator pedal.

Cruise Test — Part 3

=NFAT0029S0406

SAT812A

4. Set selector lever sets in 3rd position while driving in D4.

5. Does A/T shift from D

to D3?

Read gear position and vehicle speed.

YesorNo

Yes 䊳 GO TO 2. No 䊳 Mark the box of “A/T Does Not Shift: D

the DIAGNOSTIC WORKSHEET. Continue ROAD TEST.

SAT813A

SAT677K

, D3, When selector lever D , 3rd position on

AT-84

Page 89

TROUBLE DIAGNOSIS — BASIC INSPECTION

2 CHECK ENGINE BRAKE

Does vehicle decelerate by engine brake?

Road Test (Cont’d)

YesorNo

Yes 䊳 GO TO 3. No 䊳 Mark the box of “Engine Speed Does Not Return To Idle (Light Braking D

DIAGNOSTIC WORKSHEET. Continue ROAD TEST.

3 CHECK SHIFT DOWN (D3TO D2)

1. Move selector lever from 3rd to 2nd position while driving in D3.

2. Does A/T shift from D

Read gear position.

Yes 䊳 GO TO 4. No 䊳 Mark the box of “A/T Does Not Shift: D

to 22?

YesorNo

, D2, When Selector Lever 3rd , 2nd Posi-

tion” on the DIAGNOSTIC WORKSHEET. Continue ROAD TEST.

SAT677K

, D3)” on the

SAT678K

AT-85

IDX

Page 90

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

4 CHECK ENGINE BRAKE

Does vehicle decelerate by engine brake?

YesorNo

Yes 䊳 GO TO 5. No 䊳 Mark the box of “Engine Speed Does Not Return To Idle (Light Braking D

DIAGNOSTIC WORKSHEET. Continue ROAD TEST.

5 CHECK SHIFT DOWN (22TO 11)

1. Move selector lever from 2nd to 1st position while driving in 22.

2. Does A/T shift from 2

Read gear position.

to 11position?

SAT678K

, D3)” on the

YesorNo

Yes 䊳 GO TO 6. No 䊳 Mark the box of “A/T Does Not Shift: 2

on the DIAGNOSTIC WORKSHEET. Continue ROAD TEST.

AT-86

SAT514K

, 11, When Selector Lever 2nd , 1st Position”

Page 91

TROUBLE DIAGNOSIS — BASIC INSPECTION

6 CHECK ENGINE BRAKE

Does vehicle decelerate by engine brake?

Road Test (Cont’d)

SAT514K

YesorNo

Yes 䊳 1. Stop vehicle.

2. Perform self-diagnosis. Refer to TCM Self-diagnostic Procedure (No Tools), AT-53.

No 䊳 Mark the box of “Vehicle Does Not Decelerate By Engine Brake” on the DIAGNOSTIC

WORKSHEET. Stop ROAD TEST.

AT-87

IDX

Page 92

Symptom Chart

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart

Numbers are arranged in order of inspection. Perform inspections starting with number one and work up.

Items Symptom Condition Diagnostic Item Reference Page

Torque converter is not locked up.

No Lock-up Engagement/TCC Inoperative

Torque converter clutch piston slip.

ON vehicle

OFF vehicle 8. Torque converter AT-293

ON vehicle

1. Accelerator pedal position sensor AT-189

2. Vehicle speed sensor·A/T (Revolution sensor) and vehicle speed sensor·MTR

3. Engine speed signal AT-126

4. A/T fluid temperature sensor AT-201

5. Line pressure test AT-69

6. Torque converter clutch solenoid valve AT-158

7. Control valve assembly AT-282

1. Fluid level AT-65

2. Accelerator pedal position sensor AT-189

3. Line pressure test AT-69

4. Torque converter clutch solenoid valve AT-158

5. Line pressure solenoid valve AT-173

AT-121, 208

NFAT0030

Shift Shock

Lock-up point is extremely high or low. AT-251

Sharp shock in shifting from N to D position.

6. Control valve assembly AT-282

OFF vehicle 7. Torque converter AT-293

1. Accelerator pedal position sensor AT-189

2. Vehicle speed sensor·A/T (Revolution

ON vehicle

OFF vehicle 9. Forward clutch AT-336

sensor) and vehicle speed sensor·MTR

3. Torque converter clutch solenoid valve AT-158

4. Control valve assembly AT-282

1. Engine idling rpm EC-59

2. Accelerator pedal position sensor AT-189

3. Line pressure test AT-69

4. A/T fluid temperature sensor AT-201

5. Engine speed signal AT-126

6. Line pressure solenoid valve AT-173

7. Control valve assembly AT-282

8. Accumulator N-D AT-282

AT-121, 208

AT-88

Page 93

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Items Symptom Condition Diagnostic Item Reference Page

Shift Shock

Too sharp a shock in change from D

to D2.

to D3.

to D4.

1. Accelerator pedal position sensor AT-189

2. Line pressure test AT-69

ON vehicle

OFF vehicle 6. Brake band AT-341

ON vehicle

OFF vehicle

ON vehicle

3. Accumulator servo release AT-282

4. Control valve assembly AT-282

5. A/T fluid temperature sensor AT-201

1. Accelerator pedal position sensor AT-189

2. Line pressure test AT-69

3. Control valve assembly AT-282

4. A/T fluid temperature sensor AT-201

5. High clutch AT-331

6. Brake band AT-353

1. Accelerator pedal position sensor AT-189

2. Line pressure test AT-69

3. Control valve assembly AT-282

4. A/F fluid temperature sensor AT-201

5. Brake band AT-353

Improper Shift Timing

Gear change shock felt during deceleration by releasing accelerator pedal.

Large shock changing from 1 to 11in 1st position.

Too high a gear change point from D

to D2, from D

to D3, from D3to D

AT-242, 245, 248

Gear change directly from D D

occurs.

OFF vehicle

ON vehicle

ON vehicle 1. Control valve assembly AT-282

OFF vehicle 2. Low & reverse brake AT-341

ON vehicle

OFF vehicle 3. Brake band AT-353

6. Overrun clutch AT-336

7. Forward one-way clutch AT-344

1. Accelerator pedal position sensor AT-189

2. Line pressure test AT-69

3. Overrun clutch solenoid valve AT-196

4. Control valve assembly AT-282

1. Accelerator pedal position sensor AT-189

2. Vehicle speed sensor·A/T (Revolution sensor) and vehicle speed sensor·MTR

3. Shift solenoid valve A AT-179

4. Shift solenoid valve B AT-184

1. Fluid level AT-65

2. Accumulator servo release AT-282

AT-121, 208

AT-89

IDX

Page 94

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Items Symptom Condition Diagnostic Item Reference Page

Improper Shift Timing

Too high a change point from D

to D3, from D

to D2, from D2to D

Kickdown does not operate when depressing pedal in D

within kick-

down vehicle speed.

Kickdown operates or engine overruns when depressing pedal in D

beyond kick-

down vehicle speed limit.

Gear change from 2

to 23in 2nd

position.

Gear change from 1

to 12in 1st

position.

ON vehicle

1. Accelerator pedal position sensor AT-189

2. Vehicle speed sensor·A/T (Revolution sensor) and vehicle speed sensor·MTR

AT-121, 208

1. Accelerator pedal position sensor AT-189

2. Vehicle speed sensor·A/T (Revolution sensor) and vehicle speed sensor·MTR

AT-121, 208

3. Shift solenoid valve A AT-179

4. Shift solenoid valve B AT-184

1. Vehicle speed sensor·A/T (Revolution sensor) and vehicle speed sensor·MTR

AT-121, 208

2. Accelerator pedal position sensor AT-189

3. Shift solenoid valve A AT-179

4. Shift solenoid valve B AT-184

1. Park/neutral position (PNP) switch AT-109

2. Control cable adjustment AT-284

1. Park/neutral position (PNP) switch adjustment

AT-283

2. Control cable adjustment AT-284

No Down Shift

Failure to change gear from D

Failure to change gear from D D

or from D4to

ON vehicle

OFF vehicle

ON vehicle

OFF vehicle

1. Fluid level AT-65

2. Accelerator pedal position sensor AT-189

3. Overrun clutch solenoid valve AT-196

4. Shift solenoid valve A AT-179

5. Line pressure solenoid valve AT-173

6. Control valve assembly AT-282

7. Brake band AT-353

8. Overrun clutch AT-336

1. Fluid level AT-65

2. Accelerator pedal position sensor AT-189

3. Shift solenoid valve A AT-179

4. Shift solenoid valve B AT-184

5. Control valve assembly AT-282

6. High clutch AT-331

7. Brake band AT-353

AT-90

Page 95

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Items Symptom Condition Diagnostic Item Reference Page

No Down Shift

Failure to change gear from D D

or from D3to

Failure to change from D when changing lever into 2nd position. AT-256

Does not change from 1 1st position.

to 2

to 11in

1. Fluid level AT-65

2. Accelerator pedal position sensor AT-189

ON vehicle

OFF vehicle

ON vehicle

OFF vehicle 5. Brake band AT-353

ON vehicle

OFF vehicle

3. Shift solenoid valve A AT-179

4. Shift solenoid valve B AT-184

5. Control valve assembly AT-282

6. Low one-way clutch AT-288

7. High clutch AT-331

8. Brake band AT-353

1. Accelerator pedal position sensor AT-189

2. Shift solenoid valve B AT-184

3. Control valve assembly AT-282

4. Control cable adjustment AT-284

1. Vehicle speed sensor·A/T (Revolution sensor) and vehicle speed sensor·MTR

2. Shift solenoid valve A AT-179

3. Control valve assembly AT-282

4. Low one-way clutch AT-288

5. Brake band AT-353

AT-121, 208

No Up Shift

Failure to change gear from D D

6. Low & reverse brake AT-341

1. Control cable adjustment AT-284

2. Shift solenoid valve A AT-179

ON vehicle

OFF vehicle 6. Brake band AT-353

ON vehicle

OFF vehicle

3. Control valve assembly AT-282

4. Vehicle speed sensor·A/T (Revolution sensor) and vehicle speed sensor·MTR

5. Accelerator pedal position sensor AT-189

1. Control cable adjustment AT-284

2. Shift solenoid valve B AT-184

3. Control valve assembly AT-282

4. Vehicle speed sensor·A/T (Revolution sensor) and vehicle speed sensor·MTR

5. Accelerator pedal position sensor AT-189

6. High clutch AT-331

7. Brake band AT-353

AT-121, 208

IDX

AT-91

Page 96

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Items Symptom Condition Diagnostic Item Reference Page

1. Park/neutral position (PNP) switch AT-109

2. 3rd position switch AT-267

3. Control cable adjustment AT-284

No Up Shift

Failure to change gear from D D

A/T does not shift to D

ing with selector lever from 3rd to D position.

when driv-

ON vehicle

OFF vehicle 8. Brake band AT-353

ON vehicle

OFF vehicle

4. Shift solenoid valve A AT-179

5. Vehicle speed sensor·A/T (Revolution sensor) and vehicle speed sensor·MTR

6. A/T fluid temperature sensor AT-201

7. Accelerator pedal position sensor AT-189

1. Accelerator pedal position sensor AT-189

2. Park/neutral position (PNP) switch AT-109

3. 3rd position switch AT-267

4. Vehicle speed sensor·A/T (Revolution sensor) and vehicle speed sensor·MTR

5. Shift solenoid valve A AT-179

6. Overrun clutch solenoid valve AT-196

7. Control valve assembly AT-282

8. A/T fluid temperature sensor AT-201

9. Line pressure solenoid valve AT-173

10. Brake band AT-353

11. Overrun clutch AT-336

AT-121, 208

Slips/Will Not Engage

Vehicle will not run in R position (but runs in D, 2nd and 1st positions). Clutch slips. Very poor acceleration. AT-233

Vehicle will not run in D and 2nd positions (but runs in 1st and R positions).

1. Control cable adjustment AT-284

2. Stall test AT-65

ON vehicle

OFF vehicle

ON vehicle 1. Control cable adjustment AT-284

OFF vehicle 2. Low one-way clutch AT-288

3. Line pressure test AT-69

4. Line pressure solenoid valve AT-173

5. Control valve assembly AT-282

6. Reverse clutch AT-328

7. High clutch AT-331

8. Forward clutch AT-336

9. Overrun clutch AT-336

10. Low & reverse brake AT-341

AT-92

Page 97

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Items Symptom Condition Diagnostic Item Reference Page

Slips/Will Not Engage

Vehicle will not run in D, 1st, 2nd positions (but runs in R position). Clutch slips. Very poor acceleration. AT-236

Clutches or brakes slip somewhat in starting.

ON vehicle

OFF vehicle

ON vehicle

1. Fluid level AT-65

2. Stall test AT-65

3. Line pressure test AT-69

4. Line pressure solenoid valve AT-173

5. Control valve assembly AT-282

6. Accumulator N-D AT-282

7. Reverse clutch AT-328

8. High clutch AT-331

9. Forward clutch AT-336

10. Forward one-way clutch AT-344

11. Low one-way clutch AT-288

1. Fluid level AT-65

2. Control cable adjustment AT-284

3. Accelerator pedal position sensor AT-189

4. Line pressure test AT-69

5. Line pressure solenoid valve AT-173

6. Control valve assembly AT-282

7. Accumulator N-D AT-282

8. Shift solenoid valve A AT-179

9. Shift solenoid valve B AT-184

10. Overrun clutch solenoid valve AT-196

No creep at all. AT-233, 236

OFF vehicle

ON vehicle

OFF vehicle

11. Torque converter clutch solenoid valve AT-158

12. Forward clutch AT-336

13. Reverse clutch AT-328

14. Low & reverse brake AT-341

15. Oil pump AT-310

16. Torque converter AT-293

1. Fluid level AT-65

2. Line pressure test AT-69

3. Control valve assembly AT-282

4. Forward clutch AT-336

5. Oil pump AT-310

6. Torque converter AT-293

IDX

AT-93

Page 98

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Items Symptom Condition Diagnostic Item Reference Page

Almost no shock or clutches slipping in change from D

to D2.

1. Fluid level AT-65

2. Accelerator pedal position sensor AT-189

ON vehicle

3. Line pressure test AT-69

4. Accumulator servo release AT-282

5. Control valve assembly AT-282

OFF vehicle 6. Brake band AT-353

1. Fluid level AT-65

Slips/Will Not Engage

Almost no shock or slipping in change from D D

Races extremely fast or slips in changing from D to D3when depressing pedal.

ON vehicle

2. Accelerator pedal position sensor AT-189

3. Line pressure test AT-69

4. Control valve assembly AT-282

5. High clutch AT-331

OFF vehicle

6. Brake band AT-353

1. Fluid level AT-65

2. Accelerator pedal position sensor AT-189

ON vehicle

3. Line pressure test AT-69

4. Control valve assembly AT-282

OFF vehicle 5. Brake band AT-353

1. Fluid level AT-65

2. Accelerator pedal position sensor AT-189

3. Line pressure test AT-69

ON vehicle

4. Line pressure solenoid valve AT-173

5. Shift solenoid valve A AT-179

6. Control valve assembly AT-282

7. Brake band AT-353

OFF vehicle

8. Forward clutch AT-336

Races extremely fast or slips in changing from D to D2when depressing pedal.

ON vehicle

OFF vehicle

1. Fluid level AT-65

2. Accelerator pedal position sensor AT-189

3. Line pressure test AT-69

4. Line pressure solenoid valve AT-173

5. Shift solenoid valve A AT-179

6. Shift solenoid valve B AT-184

7. Control valve assembly AT-282

8. Brake band AT-353

9. Forward clutch AT-336

AT-94

Page 99

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Items Symptom Condition Diagnostic Item Reference Page

Slips/Will Not Engage

Races extremely fast or slips in changing from D to D2when depressing pedal.

Races extremely fast or slips in changing from D or D3to D1when depressing pedal.

ON vehicle

OFF vehicle

ON vehicle

OFF vehicle

1. Fluid level AT-65

2. Accelerator pedal position sensor AT-189

3. Line pressure test AT-69

4. Line pressure solenoid valve AT-173

5. Shift solenoid valve B AT-184

6. Control valve assembly AT-282

7. Brake band AT-353

8. High clutch AT-331

1. Fluid level AT-65

2. Accelerator pedal position sensor AT-189

3. Line pressure test AT-69

4. Line pressure solenoid valve AT-173

5. Shift solenoid valve A AT-179

6. Shift solenoid valve B AT-184

7. Control valve assembly AT-282

8. Forward clutch AT-336

9. Forward one-way clutch AT-344

NOT USED

Vehicle will not run in any position.

Engine cannot be started in P and N positions. AT-226

Engine starts in positions other than P and N. AT-226

ON vehicle

OFF vehicle

ON vehicle

10. Low one-way clutch AT-288

1. Fluid level AT-65

2. Control cable adjustment AT-284

3. Line pressure test AT-69

4. Line pressure solenoid valve AT-173

5. Oil pump AT-310

6. Torque converter AT-293

7. Parking components AT-288

1. Ignition switch and starter EL-12, and SC-10

2. Control cable adjustment AT-284

3. Park/neutral position (PNP) switch adjustment

1. Control cable adjustment AT-284

2. Park/neutral position (PNP) switch adjustment

AT-283

AT-95

IDX

Page 100

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Items Symptom Condition Diagnostic Item Reference Page

Transaxle noise in P and N positions.

ON vehicle

1. Fluid level AT-65

2. Line pressure test AT-69

3. Accelerator pedal position sensor AT-189

4. Vehicle speed sensor·A/T (Revolution sensor) and vehicle speed sensor·MTR

AT-121, 208

NOT USED

Vehicle moves when changing into P position or parking gear does not disengage when shifted out of P position. AT-228

Vehicle runs in N position. AT-229

Vehicle braked when shifting into R position.

OFF vehicle

ON vehicle 1. Control cable adjustment AT-284

OFF vehicle 2. Parking components AT-288

ON vehicle 1. Control cable adjustment AT-284

OFF vehicle

ON vehicle

OFF vehicle

5. Oil pump AT-310

6. Torque converter AT-293

2. Forward clutch AT-336

3. Reverse clutch AT-328

4. Overrun clutch AT-336

1. Fluid level AT-65

2. Line pressure test AT-69

3. Line pressure solenoid valve AT-173

4. Control valve assembly AT-282

5. High clutch AT-331

6. Brake band AT-353

7. Forward clutch AT-336

8. Overrun clutch AT-336

Excessive creep. ON vehicle 1. Engine idling rpm EC-59

1. Engine idling rpm EC-59

Engine stops when shifting lever into R, D, 2nd and 1st position.

Vehicle braked by gear change from D

to D2.

ON vehicle

OFF vehicle 5. Torque converter AT-293 ON vehicle 1. Fluid level AT-65

OFF vehicle

2. Fluid level AT-65

3. Torque converter clutch solenoid valve AT-158

4. Control valve assembly AT-282

2. Reverse clutch AT-328

3. Low & reverse brake AT-341

4. High clutch AT-331

5. Low one-way clutch AT-288

AT-96

Nissan Maxima 2003 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

QUICK REFERENCE INDEX

FOREWORD

Alphabetical & P No. Index for DTC

PRECAUTIONS

Precautions for On Board Diagnostic (OBD) System of A/T and Engine

Precautions

Service Notice or Precautions

Wiring Diagrams and Trouble Diagnosis

PREPARATION

Special Service Tools

Commercial Service Tools

OVERALL SYSTEM

A/T Electrical Parts Location

Circuit Diagram

Cross-sectional View

Hydraulic Control Circuit

Shift Mechanism

Control System

CAN Communication

Control Mechanism

Control Valve

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Introduction

OBD-II Function for A/T System

One or Two Trip Detection Logic of OBD-II

OBD-II Diagnostic Trouble Code (DTC)

Malfunction Indicator Lamp (MIL)

CONSULT-II

Diagnostic Procedure Without CONSULT-II

Introduction

Work Flow

A/T Fluid Check

Stall Test

Line Pressure Test

Road Test

Symptom Chart