Nissan Xterra Automatic Transmission AT 2000 Owner's Manual

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AUTOMATIC TRANSMISSION

CONTENTS

TROUBLE DIAGNOSIS - INDEX ....................................4

Alphabetical & P No. Index for DTC ...........................4

PRECAUTIONS ...............................................................6

Supplemental Restraint System (SRS) ″AIR

BAG″ and ″SEAT BELT PRE-TENSIONER″...............6

Precautions for On Board Diagnostic (OBD)

System of A/T and Engine...........................................6

Precautions..................................................................6

Service Notice or Precautions.....................................8

Wiring Diagrams and Trouble Diagnosis.....................9

PREPARATION .............................................................10

Special Service Tools................................................10

OVERALL SYSTEM ......................................................12

A/T Electrical Parts Location .....................................12

Circuit Diagram..........................................................13

Cross-sectional View .................................................14

Hydraulic Control Circuit............................................15

Shift Mechanism ........................................................16

Control System ..........................................................25

Control Mechanism....................................................26

Control Valve .............................................................31

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION...............................................................33

Introduction................................................................33

OBD-II Function for A/T System................................33

One or Two Trip Detection Logic of OBD-II..............33

OBD-II Diagnostic Trouble Code (DTC)....................33

Malfunction Indicator Lamp (MIL)..............................37

CONSULT-II...............................................................37

Diagnostic Procedure Without CONSULT-II..............46

TROUBLE DIAGNOSIS - INTRODUCTION..................53

Introduction................................................................53

Work Flow..................................................................57

TROUBLE DIAGNOSIS - BASIC INSPECTION...........59

A/T Fluid Check.........................................................59

Stall Test....................................................................59

Line Pressure Test.....................................................62

Road Test...................................................................63

SECTION

TROUBLE DIAGNOSIS - GENERAL

DESCRIPTION...............................................................81

Symptom Chart..........................................................81

TCM Terminals and Reference Value........................92

TROUBLE DIAGNOSIS FOR POWER SUPPLY..........96

Wiring Diagram - AT - MAIN......................................96

DTC P0705 PARK/NEUTRAL POSITION (PNP)

SWITCH .........................................................................99

Description.................................................................99

Wiring Diagram - AT - PNP/SW...............................101

Diagnostic Procedure ..............................................102

Component Inspection.............................................104

DTC P0710 A/T FLUID TEMPERATURE SENSOR

CIRCUIT.......................................................................105

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

Wiring Diagram - AT - FTS......................................107

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

Component Inspection.............................................110

DTC P0720 VEHICLE SPEED SENSOR.A/T

(REVOLUTION SENSOR) ...........................................111

Description............................................................... 111

Wiring Diagram - AT - VSSA/T................................113

Diagnostic Procedure ..............................................114

Component Inspection.............................................115

DTC P0725 ENGINE SPEED SIGNAL .......................116

Description...............................................................116

Wiring Diagram - AT - ENGSS................................117

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

DTC P0731 IMPROPER SHIFTING TO 1ST GEAR

POSITION ....................................................................120

Description...............................................................120

Wiring Diagram - AT - 1ST......................................123

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

Component Inspection.............................................125

DTC P0732 IMPROPER SHIFTING TO 2ND GEAR

POSITION ....................................................................126

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

Wiring Diagram - AT - 2ND......................................129

Diagnostic Procedure ..............................................130

IDX

CONTENTS (Cont’d)

Component Inspection.............................................130

DTC P0733 IMPROPER SHIFTING TO 3RD GEAR

POSITION ....................................................................132

Description...............................................................132

Wiring Diagram - AT - 3RD......................................135

Diagnostic Procedure ..............................................136

Component Inspection.............................................136

DTC P0734 IMPROPER SHIFTING TO 4TH GEAR

POSITION ....................................................................138

Description...............................................................138

Wiring Diagram - AT - 4TH......................................142

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

Component Inspection.............................................146

DTC P0740 TORQUE CONVERTER CLUTCH

SOLENOID VALVE......................................................147

Description...............................................................147

Wiring Diagram - AT - TCV......................................149

Diagnostic Procedure ..............................................150

Component Inspection.............................................151

DTC P0744 IMPROPER LOCK-UP OPERATION......152

Description...............................................................152

Wiring Diagram - AT - TCCSIG...............................155

Diagnostic Procedure ..............................................156

Component Inspection.............................................159

DTC P0745 LINE PRESSURE SOLENOID VALVE...160

Description...............................................................160

Wiring Diagram - AT - LPSV....................................162

Diagnostic Procedure ..............................................163

Component Inspection.............................................164

DTC P0750 SHIFT SOLENOID VALVE A ..................165

Description...............................................................165

Wiring Diagram - AT - SSV/A..................................167

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

Component Inspection.............................................169

DTC P0755 SHIFT SOLENOID VALVE B..................170

Description...............................................................170

Wiring Diagram - AT - SSV/B..................................172

Diagnostic Procedure ..............................................173

Component Inspection.............................................174

DTC P1705 THROTTLE POSITION SENSOR ...........175

Description...............................................................175

Wiring Diagram - AT - TPS......................................178

Diagnostic Procedure ..............................................179

Component Inspection.............................................183

DTC P1760 OVERRUN CLUTCH SOLENOID

VALVE..........................................................................184

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

Wiring Diagram - AT - OVRCSV..............................186

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

Component Inspection.............................................188

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

SENSOR CIRCUIT AND TCM POWER SOURCE)....189

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

Wiring Diagram - AT - BA/FTS................................191

Diagnostic Procedure ..............................................192

Component Inspection.............................................194

VEHICLE SPEED SENSOR.MTR................................195

Description...............................................................195

Wiring Diagram - AT - VSSMTR..............................197

Diagnostic Procedure ..............................................198

DTC CONTROL UNIT (RAM), CONTROL UNIT

(ROM)...........................................................................199

Description...............................................................199

Diagnostic Procedure ..............................................200

DTC CONTROL UNIT (EEPROM) ..............................201

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

Diagnostic Procedure ..............................................202

TROUBLE DIAGNOSES FOR SYMPTOMS...............203

Wiring Diagram - AT - NONDTC.............................203

1. O/D OFF Indicator Lamp Does Not Come On....206

2. Engine Cannot Be Started In P and N Position..208

3. In ″P″ Position, Vehicle Moves Forward Or

Backward When Pushed.........................................209

4. In N Position, Vehicle Moves ..............................210

5. Large Shock. N -> R Position.............................212

6. Vehicle Does Not Creep Backward In R

Position....................................................................214

7. Vehicle Does Not Creep Forward In D, 2 Or 1

Position....................................................................217

8. Vehicle Cannot Be Started From D

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

-> D2..................................................223

10. A/T Does Not Shift: D

11. A/T Does Not Shift: D

-> D2Or Does Not

-> D3.............................226

-> D4.............................229

...................220

12. A/T Does Not Perform Lock-up.........................232

13. A/T Does Not Hold Lock-up Condition..............234

14. Lock-up Is Not Released...................................236

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

16. Vehicle Does Not Start From D

17. A/T Does Not Shift: D

-> D3).....................................................237

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

-> D3, When

Overdrive Control Switch ON -> OFF .....................240

18. A/T Does Not Shift: D

-> 22, When Selector

Lever D -> 2 Position ..............................................241

19. A/T Does Not Shift: 2

-> 11, When Selector

Lever 2 -> 1 Position...............................................242

20. Vehicle Does Not Decelerate By Engine

Brake........................................................................243

21. TCM Self-diagnosis Does Not Activate (PNP, Overdrive Control and Throttle Position Switches

Circuit Checks) ........................................................243

A/T SHIFT LOCK SYSTEM.........................................251

Description...............................................................251

Wiring Diagram - SHIFT -........................................252

AT-2

CONTENTS (Cont’d)

Diagnostic Procedure ..............................................253

Component Check...................................................255

KEY INTERLOCK CABLE ..........................................256

Components.............................................................256

Removal...................................................................256

Installation................................................................257

ON-VEHICLE SERVICE ..............................................258

Control Valve Assembly and Accumulators.............258

Revolution Sensor Replacement.............................259

Rear Oil Seal Replacement.....................................259

Parking Components Inspection..............................259

Park/Neutral Position (PNP) Switch Adjustment .....260

Manual Control Linkage Adjustment........................260

REMOVAL AND INSTALLATION...............................261

Removal...................................................................261

Installation................................................................263

OVERHAUL .................................................................264

Components.............................................................264

Oil Channel..............................................................266

Locations of Needle Bearings, Thrust Washers

and Snap Rings.......................................................267

DISASSEMBLY............................................................268

REPAIR FOR COMPONENT PARTS .........................279

Oil Pump..................................................................279

Control Valve Assembly...........................................283

Control Valve Upper Body.......................................289

Control Valve Lower Body.......................................294

Reverse Clutch ........................................................296

High Clutch ..............................................................300

Forward and Overrun Clutches ...............................302

Low & Reverse Brake..............................................306

Forward Clutch Drum Assembly..............................310

Rear Internal Gear and Forward Clutch Hub..........312

Band Servo Piston Assembly..................................315

Parking Pawl Components......................................319

ASSEMBLY..................................................................321

Assembly (1)............................................................321

Adjustment...............................................................329

Assembly (2)............................................................331

SERVICE DATA AND SPECIFICATIONS (SDS).......338

General Specifications.............................................338

Shift Schedule..........................................................338

Stall Revolution........................................................338

Line Pressure...........................................................338

Return Springs.........................................................339

Accumulator O-ring..................................................340

Clutches and Brakes ...............................................340

Oil Pump and Low One-way Clutch........................342

Total End Play..........................................................342

Reverse Clutch Drum End Play ..............................343

Removal and Installation.........................................343

AT-3

IDX

Alphabetical & P No. Index for DTC

TROUBLE DIAGNOSIS — INDEX

Alphabetical & P No. Index for DTC

ALPHABETICAL INDEX FOR DTC

Items

(CONSULT-II screen terms)

A/T 1ST GR FNCTN 1103 P0731 AT-120 A/T 2ND GR FNCTN 1104 P0732 AT-126 A/T 3RD GR FNCTN 1105 P0733 AT-132 A/T 4TH GR FNCTN 1106 P0734 AT-138 A/T TCC S/V FNCTN 1107 P0744 AT-152 ATF TEMP SEN/CIRC 1208 P0710 AT-105 ENGINE SPEED SIG 1207 P0725 AT-116 L/PRESS SOL/CIRC 1205 P0745 AT-160 O/R CLTCH SOL/CIRC 1203 P1760 AT-184 PNP SW/CIRC 1101 P0705 AT-99 SFT SOL A/CIRC*3 1108 P0750 AT-165 SFT SOL B/CIRC*3 1201 P0755 AT-170

ECM*1

DTC

CONSULT-II

GST*2

Reference page

NGAT0179

NGAT0179S01

TCC SOLENOID/CIRC 1204 P0740 AT-147 TP SEN/CIRC A/T*3 1206 P1705 AT-175 VEH SPD SEN/CIR AT*4 1102 P0720 AT-111

*1: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN. *2: These numbers are prescribed by SAE J2012. *3: When the fail-safe operation occurs, the MIL illuminates. *4: 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-4

TROUBLE DIAGNOSIS — INDEX

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

P NO. INDEX FOR DTC

DTC

CONSULT-II

GST*2 P0705 1101 PNP SW/CIRC AT-99 P0710 1208 ATF TEMP SEN/CIRC AT-105 P0720 1102 VEH SPD SEN/CIR AT*4 AT-111 P0725 1207 ENGINE SPEED SIG AT-116 P0731 1103 A/T 1ST GR FNCTN AT-120 P0732 1104 A/T 2ND GR FNCTN AT-126 P0733 1105 A/T 3RD GR FNCTN AT-132 P0734 1106 A/T 4TH GR FNCTN AT-138 P0740 1204 TCC SOLENOID/CIRC AT-147 P0744 1107 A/T TCC S/V FNCTN AT-152 P0745 1205 L/PRESS SOL/CIRC AT-160 P0750 1108 SFT SOL A/CIRC*3 AT-165 P0755 1201 SFT SOL B/CIRC*3 AT-170

ECM*1

Items

(CONSULT-II screen terms)

=NGAT0179S02

Reference page

P1705 1206 TP SEN/CIRC A/T*3 AT-175 P1760 1203 O/R CLTCH SOL/CIRC AT-184

the same time.

AT-5

IDX

PRECAUTIONS

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

The supplemental Restraint System such as “AIR BAG” and “SEAT BELTPRE-TENSIONER” used along with a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. The 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, a crash zone sensor, warning lamp, wiring harness and spiral cable. Information necessary to service the system safely is included in the RS section of this Service Manual.

WARNING:

I 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 must be performed by an authorized NISSAN dealer.

I 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, refer to

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

Service Manual. Spiral cable and wiring harnesses (except “SEAT BELT PRE-TENSIONER”) covered with yellow insulation either just before the harness connectors or for the complete harness are related to the SRS.

RS-16

NGAT0001

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:

I 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.

I 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.)

I 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.

I 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.

I Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM and

ECM before returning the vehicle to the customer.

NGAT0002

SEF289H

Precautions

I 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.

NGAT0003

AT-6

PRECAUTIONS

Precautions (Cont’d)

I When connecting or disconnecting pin connectors into or

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

AAT470A

MEF040DA

SAT964I

I Before replacing TCM, perform TCM input/output signal

inspection and make sure whether TCM functions properly or not. (See page AT-92.)

I 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.

I Before proceeding with disassembly, thoroughly clean the out-

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

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

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

I Place disassembled parts in order for easier and proper

assembly.

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

non-flammable solvent before inspection or reassembly.

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

transmission is disassembled.

I It is very important to perform functional tests whenever they

are indicated.

I 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.

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

bores in valve body under their own weight.

AT-7

IDX

Precautions (Cont’d)

PRECAUTIONS

I 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.

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

seals and gaskets when assembling.

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

pan or clogging strainer. Refer to “ATF COOLER SERVICE” (Refer to AT-9).

I After overhaul, refill the transmission with new ATF. I 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 “Changing A/T Fluid” refer to

MA-37

whenchangingA/Tfluid.

Service Notice or Precautions

FAIL-SAFE

NGAT0004

NGAT0004S01

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 1, 2 or D. The customer may complain of sluggish or poor acceleration. When the ignition key is turned ON following Fail-Safe operation, O/D OFF indicator lamp blinks for about 8 seconds. (For “TCM SELF-DIAGNOSTIC PROCEDURE (No Tools)”, refer to AT-47.) Fail-Safe may occur without electrical circuit damage if the vehicle is driven under extreme conditions (such as excessive wheel spin followed by sudden braking). To recover normal shift pattern, turn the ignition key OFF for 5 seconds, then ON. The blinking of the O/D OFF 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-57). The SELF-DIAGNOSIS results will be as follows: The first SELF-DIAGNOSIS will indicate damage to the vehicle speed sensor or the revolution sensor. During the next SELF-DIAGNOSIS, performed after checking the sensor, no damages will be indicated.

TORQUE CONVERTER SERVICE

NGAT0004S04

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

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

I Converter is contaminated with engine coolant containing antifreeze. I Internal failure of stator roller clutch. I Heavy clutch debris due to overheating (blue converter). I 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: I The fluid has an odor, is discolored, and there is no evidence of metal or clutch facing particles.

AT-8

PRECAUTIONS

Service Notice or Precautions (Cont’d)

I The threads in one or more of the converter bolt holes are damaged. I Transmission failure did not display evidence of damaged or worn internal parts, steel particles or clutch

plate lining material in unit and inside the fluid filter. I 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

Replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer. Replace radiator lower tank (which includes ATF cooler) with a new one and flush cooler line using cleaning solvent and compressed air.

OBD-II SELF-DIAGNOSIS

I 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 O/D OFF indicator or the malfunction indicator lamp (MIL). Refer to the table on

AT-38 for the indicator used to display each self-diagnostic result. I 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-35 to complete the repair and avoid

unnecessary blinking of the MIL.

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

the O/D OFF 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

I 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

“Description”, “HARNESS CONNECTOR”.

EC-627

(“ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”).

Wiring Diagrams and Trouble Diagnosis

When you read wiring diagrams, refer to the followings:

GI-10

I “HOW TO READ WIRING DIAGRAMS” refer to I “POWER SUPPLY ROUTING” for power distribution circuit refer to

When you perform trouble diagnosis, refer to the followings:

I “HOW TO FOLLOW TEST GROUP IN TROUBLE DIAGNOSIS” refer to I “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT” refer to

EL-9

GI-34

GI-23

NGAT0004S02

NGAT0004S03

EL-5

NGAT0005

AT-9

IDX

Special Service Tools

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

ST2505S001 (J34301-C) Oil pressure gauge set 1 ST25051001 (—) Oil pressure gauge 2 ST25052000 (—) Hose 3 ST25053000 (—) Joint pipe 4 ST25054000 (—) Adapter 5 ST25055000 (—) Adapter

ST07870000 (J37068) Transmission case stand

Description

Measuring line pressure

NT097

Disassembling and assembling A/T

a: 182 mm (7.17 in) b: 282 mm (11.10 in) c: 230 mm (9.06 in) d: 100 mm (3.94 in)

NGAT0006

KV31102100 (J37065) Torque converter oneway clutch check tool

ST25850000 (J25721-A) Sliding hammer

KV31102400 (J34285 and J34285-87) Clutch spring compressor

NT421

Checking one-way clutch in torque converter

NT098

Removing oil pump assembly

a: 179 mm (7.05 in) b: 70 mm (2.76 in) c: 40 mm (1.57 in) dia. d: M12 x 1.75P

NT422

Removing and installing clutch return springs

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

NT423

AT-10

Tool number (Kent-Moore No.) Tool name

PREPARATION

Special Service Tools (Cont’d)

Description

ST33200000 (J26082) Drift

(J34291) Shim setting gauge set

NT091

NT101

Installing oil pump housing oil seal Installing rear oil seal

a: 60 mm (2.36 in) dia. b: 44.5 mm (1.752 in) dia.

Selecting oil pump cover bearing race and oil pump thrust washer

AT-11

IDX

A/T Electrical Parts Location

OVERALL SYSTEM

A/T Electrical Parts Location

NGAT0007

AT-12

AAT622A

OVERALL SYSTEM

Circuit Diagram

NGAT0008

AT-13

AAT580A

IDX

Cross-sectional View

OVERALL SYSTEM

Cross-sectional View

NGAT0010

AT-14

SAT125BA

OVERALL SYSTEM

Hydraulic Control Circuit

NGAT0011

AT-15

SAT624GA

IDX

Shift Mechanism

OVERALL SYSTEM

Shift Mechanism

NGAT0012

The automatic transmission uses compact, dual planetary gear systems to improve power-transmission efficiency, simplify construction and reduce weight. It also employs an optimum shift control and superwide gear ratios. They improve starting performance and acceleration during medium and high-speed operation. Two one-way clutches are also employed: one is used for the forward clutch and the other for the low clutch. These one-way clutches, combined with four accumulators, reduce shifting shock to a minimum.

CONSTRUCTION

NGAT0012S01

1. Torque converter clutch piston

2. Torque converter

3. Oil pump

4. Input shaft

5. Brake band

6. Reverse clutch

7. High clutch

8. Front pinion gear

9. Front sun gear

10. Front internal gear

11. Front planetary carrier

12. Rear sun gear

13. Rear pinion gear

14. Rear internal gear

15. Rear planetary carrier

16. Forward clutch

SAT509I

17. Forward one-way clutch

18. Overrun clutch

19. Low one-way clutch

20. Low & reverse brake

21. Parking pawl

22. Parking gear

23. Output shaft

AT-16

OVERALL SYSTEM

Shift Mechanism (Cont’d)

FUNCTION OF CLUTCH AND BRAKE

Clutch and brake components Abbr. Function Reverse clutch 6 R/C To transmit input power to front sun gear 9. High clutch 7 H/C To transmit input power to front planetary carrier 11. Forward clutch 16 F/C To connect front planetary carrier 11 with forward one-way

clutch 17. Overrun clutch 18 O/C To connect front planetary carrier 11 with rear internal gear 14. Brake band 5 B/B To lock front sun gear 9. Forward one-way clutch 17 F/O.C When forward clutch 16 is engaged, to stop rear internal gear

14 from rotating in opposite direction against engine revolution. Low one-way clutch 19 L/O.C To stop front planetary carrier 11 from rotating in opposite direc-

tion against engine revolution. Low & reverse brake 20 L & R/B To lock front planetary carrier 11.

CLUTCH AND BAND CHART

For-

ward

one-

way

clutch

Low

one-

way

clutch

Low &

reverse

brake

Lock-up Remarks

Shift position

Reverse

clutch

High

clutch

For-

ward

clutch

Over-

run

clutch

2nd

apply

Band servo

3rd

release

4th

apply

=NGAT0012S02

NGAT0012S03

R q q

1st q *1D B B

2nd q *1A q B

D*4

3rd qq*1A *2C C B *5q 4th q C *3C C qq 1st qq BB

2nd qqq B

1st qq BBq

2nd qqq B

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

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

PARK

POSITION REVERSE

POSITION NEUTRAL

POSITION

Automatic

shift

1 k 2 k 3 k

Automatic

shift

1 k 2

Locks (held

stationary) in

1st speed

1 g 2

AT-17

IDX

Shift Mechanism (Cont’d)

OVERALL SYSTEM

POWER TRANSMISSION P and N Positions

I P position

Similar to the N position, no control members operate. The parking pawl interconnected with the select lever engages with the parking gear to mechanically hold the output shaft so that the power train is locked.

I N position

No control members operate. Power from the input shaft is not transmitted to the output shaft since the clutch does not operate.

=NGAT0012S04

NGAT0012S0401

AT-18

SAT039J

OVERALL SYSTEM

Shift Mechanism (Cont’d)

11Position

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

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

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

ing.

and 21.

=NGAT0012S0406

SAT100J

AT-19

IDX

Shift Mechanism (Cont’d)

OVERALL SYSTEM

D1and 21Positions

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

Overrun clutch

engagement conditions (Engine brake)

=NGAT0012S0402

Rear internal gear is locked to rotate counterclockwise because of the functioning of these three clutches. (Start-up at D

: Overdrive control switch in OFF

)

Throttle opening less than 3/16

: Throttle opening less than 3/16

At D

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

clutch.

AT-20

SAT096J

OVERALL SYSTEM

Shift Mechanism (Cont’d)

D2,22and 12Positions

Forward clutch Forward one-way clutch Brake band

Overrun clutch

engagement conditions

=NGAT0012S0403

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.

: Overdrive control switch in OFF

Throttle opening less than 3/16

: Throttle opening less than 3/16

: Always engaged

AT-21

SAT097J

IDX

Shift Mechanism (Cont’d)

OVERALL SYSTEM

D3Position

High clutch Forward clutch Forward one-way clutch

Overrun clutch

engagement conditions

=NGAT0012S0404

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.

: Overdrive control switch in OFF

Throttle opening less than 3/16

AT-22

SAT098J

OVERALL SYSTEM

Shift Mechanism (Cont’d)

D4(O/D) Position

High clutch Brake band Forward clutch

(Does not affect power transmission) Engine brake At D

=NGAT0012S0405

Input power is transmitted to front carrier through high clutch. This front planetary 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.

SAT099J

AT-23

IDX

Shift Mechanism (Cont’d)

OVERALL SYSTEM

R Position

Reverse clutch Low and reverse brake

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

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

obtained when decelerating.

=NGAT0012S0407

AT-24

SAT101J

OVERALL SYSTEM

Control System

OUTLINE

=NGAT0013

NGAT0013S01

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

SENSORS

PNP switch Throttle position sensor Closed throttle position switch Wide open throttle position switch Engine speed signal A/T fluid temperature sensor Revolution sensor Vehicle speed sensor Overdrive control switch ASCD control unit

CONTROL SYSTEM

Shift control Line pressure control Lock-up control

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

TCM

ACTUATORS

Shift solenoid valve A Shift solenoid valve B

Overrun clutch solenoid valve Torque converter clutch solenoid valve Line pressure solenoid valve O/D OFF indicator lamp

NGAT0013S02

AAT471A

AT-25

IDX

Control System (Cont’d)

OVERALL SYSTEM

TCM FUNCTION

The function of the TCM is to:

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

INPUT/OUTPUT SIGNAL OF TCM

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

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

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

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

” (overdrive) position, to the

Input

Wide open throttle position switch

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

Vehicle speed sensor

Overdrive control switch

=NGAT0013S03

NGAT0013S04

Output

ASCD control unit

Shift solenoid valve A/B

Line pressure solenoid valve

Torque converter clutch solenoid valve

Overrun clutch solenoid valve

O/D OFF indicator lamp Shows TCM faults, when A/T control components malfunction.

Sends the cruise signal and “D control unit to TCM.

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

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

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

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

” (overdrive) cancellation signal from ASCD

Control Mechanism

LINE PRESSURE CONTROL

TCM has the 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.

NGAT0180

NGAT0180S01

AT-26

OVERALL SYSTEM

Control Mechanism (Cont’d)

SAT003J

SAT004J

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 “2” position while driving in D4(OD)

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

or D

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

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.

NGAT0180S0101

NGAT0180S0102

NGAT0180S0103

SAT005J

At Low Fluid Temperature

I 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.

I 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.

NGAT0180S0104

SAT006J

IDX

AT-27

Control Mechanism (Cont’d)

SAT007J

OVERALL SYSTEM

I 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.

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.

NGAT0180S02

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)

SAT008J

1,21,11

Control of Shift Solenoid Valves A and B

NGAT0180S0201

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

Gear position

D2,22,1

Control of Shift Valves A and B

D4(OD) N-P

NGAT0180S0202

AT-28

SAT047J

OVERALL SYSTEM

Control Mechanism (Cont’d)

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

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 oil pressure signal which controls the torque converter clutch piston.

Conditions for Lock-up Operation

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

Overdrive control switch ON OFF Selector lever “D” position Gear position D Vehicle speed sensor More than set value Throttle position sensor Less than set opening

NGAT0180S03

NGAT0180S0301

SAT010J

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

Torque Converter Clutch Solenoid Valve Control

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.

OFF-time INCREASING

Amount of drain DECREASING

Pilot pressure HIGH

Lock-up RELEASING

NGAT0180S0302

SAT011J

IDX

AT-29

Control Mechanism (Cont’d)

OVERALL SYSTEM

Torque Converter Clutch Control Valve Operation

NGAT0180S0303

SAT048J

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 rotatesidle. This means the engine brake is not effective. The overrun clutch operates when the engine brake is needed.

Overrun Clutch Operating Conditions

D position D 2 position 2 1 position 1

Gear position Throttle opening

1,D2,D3

gear position

1,22

gear position At any position

1,12

Less than 3/16

NGAT0180S04

NGAT0180S0401

AT-30

SAT014J

OVERALL SYSTEM

Control Mechanism (Cont’d)

SAT015J

Overrun Clutch Solenoid Valve Control

NGAT0180S0402

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

NGAT0180S0403

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

SAT049J

Control Valve

FUNCTION OF CONTROL VALVE

Valve name Function

I Pressure regulator valve I Pressure regulator plug I Pressure regulator sleeve plug

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

Modifier accumulator piston Smooths hydraulic pressure regulated by the pressure modifier valve to prevent pul-

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

Accumulator control valve Accumulator control sleeve

Manual valve Directs line pressure to oil circuits corresponding to select positions.

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

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

sations.

lock-up mechanism, overrun clutch, 3-2 timing required for shifting. Regulate accumulator backpressure to pressure suited to driving conditions.

Hydraulic pressure drains when the shift lever is in Neutral.

NGAT0181S01

NGAT0181

AT-31

IDX

OVERALL SYSTEM

Control Valve (Cont’d)

Valve name Function

Shift valve A Simultaneously switches three oil circuits using output pressure of shift solenoid valve

A to meet driving conditions (vehicle speed, throttle opening, etc.). Provides automatic downshifting and up-shifting (1st , 2nd , 3rd , 4th gears/4th , 3rd , 2nd , 1st gears) in combination with shift valve B.

Shift valve B Simultaneously switches three 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.

Shuttle shift valve S Switches hydraulic circuits to provide 3-2 timing control and overrun clutch control in

relation to the throttle opening. Inactivates the overrun clutch to prevent interlocking in 4th gear when the throttle is wide open.

Overrun clutch control valve Switches hydraulic circuits to prevent engagement of the overrun clutch simulta-

neously with application of the brake band in 4th gear. (Interlocking occurs if the overrun clutch engages during D

4-2 relay valve Memorizes that the transmission is in 4th gear. Prevents the transmission from down-

shifting from 4th gear to 3rd and then to 2nd in combination with 4-2 sequence valve and shift valves A and B when downshifting from 4th to 2nd gear.

4-2 sequence valve Prevents band servo pressure from draining before high clutch operating pressure

and band servo releasing pressure drain (from the same circuit) during downshifting from 4th to 2nd gear.

gear operation.)

Servo charger valve An accumulator and a one-way orifice are used in the 2nd gear band servo oil circuit

to dampen shifting shock when shifting from 1st to 2nd gear. To maintain adequate flowrate when downshifting from 4th or 3rd gear to 2nd gear, the servo charger valve directs 2nd gear band servo hydraulic pressure to the circuit without going through the one-way orifice when downshifting from 3rd or a higher gear.

3-2 timing valve Prevents a late operation of the brake band when shifting selector lever from D to 1

or 2 position while driving in D

1 reducing valve Reduces low & reverse brake pressure to dampen engine-brake shock when down-

shifting from the 1 position 2nd gear to 1st gear.

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

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

increase the pressure-regulating point, with resultant engine brake capability. Torque converter relief valve Prevents an excessive rise in torque converter pressure. Torque converter clutch control valve,

torque converter clutch control plug and torque converter clutch control sleeve

Shuttle shift valve D Switches hydraulic circuits so that output pressure of the torque converter clutch sole-

Activate or inactivate the lock-up function.

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

system.

noid valve acts on the lock-up valve in the D position of 2nd, 3rd and 4th gears. (In

the D position 1st gear, lock-up is inhibited.)

I Lock-up control is not affected in D position 2nd, 3rd or 4th gears, unless output

pressure of the torque converter clutch solenoid valve is generated by a signal from the control unit.

AT-32

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 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 O/D OFF 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-46.

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

NGAT0014

NGAT0182

NGAT0015

NGAT0015S01

NGAT0015S02

Shift solenoid valve A — DTC: P0750 (1108) X Shift solenoid valve B — DTC: P0755 (1201) X Throttle position sensor or switch — DTC: P1705 (1206) X 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.

1. (

2. (

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

No Tools) The number of blinks of the malfunction indicator lamp in the Diagnostic Test Mode II (Self-Diagnostic Results) Examples: 1101, 1102, 1103, 1104, etc. For details, refer to “Malfunction Indicator Lamp (MIL)”, “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”, These DTCs are controlled by NISSAN.

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.)

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.

EC-69

NGAT0016

NGAT0016S01

AT-33

IDX

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

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

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

SAT580J

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

SAT581J

If a 1st trip DTC is stored in the ECM, the time data will be “[245]”.

SAT582J

Freeze Frame Data and 1st Trip Freeze Frame Data

NGAT0016S0101

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 “CONSULT-II”, “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”,

EC-78

. 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-34

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Priority Items

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

1 Freeze frame data Misfire — DTC: P0300 - P0306 (0701, 0603 - 0608)

Fuel Injection System Function — DTC: P0171 (0115), P0172 (0114), P0174 (0209), P0175

(0210) 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.

I If the battery terminal is disconnected, the diagnostic trouble code will be lost within 24 hours. I 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 “Emission-related Diagnostic Information”, “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”,

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

EC-57

HOW TO ERASE DTC (WITH CONSULT-II)

I 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 5 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-DIAG RESULTS”.

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

NGAT0016S02

NGAT0016S03

AT-35

IDX

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

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

SAT583J

HOW TO ERASE DTC (WITH GST)

NGAT0016S04

1. If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 5 seconds and then turn it ON (engine stopped) again.

2. Perform “OBD-II SELF-DIAGNOSTIC PROCEDURE (No Tools)”. Refer to AT-46. (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 “Generic ScanTool (GST)”, “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”,

HOW TO ERASE DTC (NO TOOLS)

EC-89

NGAT0016S05

1. If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 5 seconds and then turn it ON (engine stopped) again.

2. Perform “TCM SELF-DIAGNOSTIC PROCEDURE (No Tools)”. Refer toAT-47. (The engine warm-up step can be skipped when performing the diagnosis only to erase the DTC.)

3. Change the diagnostic test mode from Mode II to Mode I by turning the mode selector on the ECM. Refer to “HOW TO SWITCH DIAGNOSTIC TEST MODES”, “Malfunction Indicator Lamp (MIL)”, “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”,

EC-71

AT-36

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.

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

“System Description”, “WARNING LAMPS”, (Or see MIL & Data link connector in EC section.)

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 “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”.

EL-73

CONSULT-II

After performing “SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)” (AT-38), place check marks for results on the “Diagnostic Worksheet”, AT-55. Reference pages are provided 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:

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

where shifts start, and

I 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.

NGAT0183

NGAT0184

AT-37

IDX

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

SAT580J

SAT584J

SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)

NGAT0184S01

1. Turn on CONSULT-II and touch “ENGINE” for OBD-II detected items or touch “A/T” for TCM self-diagnosis. If A/T is not displayed, check TCM power supply and ground circuit. Refer to AT-92. If result is NG, refer to “POWER SUPPLY ROUTING”,

EL-9

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

SELF-DIAGNOSTIC RESULT TEST MODE

NGAT0184S02

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

“A/T” “ENGINE”

PNP switch circuit I TCM does not receive the correct

— Revolution sensor I TCM does not receive the proper VHCL SPEED

SEN·A/T Vehicle speed sensor (Meter) I TCM does not receive the proper VHCL SPEED

SEN·MTR A/T 1st gear function I A/T cannot be shifted to the 1st

—

A/T 2nd gear function I A/T cannot be shifted to the 2nd

—

PNP SW/CIRC

VEH SPD SEN/CIR AT

—

A/T 1ST GR FNCTN

A/T 2ND GR FNCTN

Malfunction is detected when ...

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

voltage signal from the sensor.

gear position even if electrical circuit is good.

TCM self-diagnosis OBD-II (DTC)

Available by

O/D OFF

indicator lamp or

“A/T” on CONSULT-II

— P0705

X P0720

X—

— P0731*1

— P0732*1

Available by

malfunction

indicator lamp*2,

“ENGINE” on CON-

SULT-II or GST

A/T 3rd gear function I A/T cannot be shifted to the 3rd

gear position even if electrical circuit is good.

—

A/T 3RD GR FNCTN

AT-38

— P0733*1

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

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

“A/T” “ENGINE”

A/T 4th gear function I A/T cannot be shifted to the 4th

—

A/T TCC S/V function (lock-up) I A/T cannot perform lock-up even

—

Shift solenoid valve A I TCM detects an improper voltage SHIFT

SOLENOID/V A Shift solenoid valve B I TCM detects an improper voltage SHIFT

SOLENOID/V B Overrun clutch solenoid valve I TCM detects an improper voltage OVERRUN

CLUTCH S/V T/C clutch solenoid valve I TCM detects an improper voltage T/C CLUTCH

SOL/V

A/T 4TH GR FNCTN

A/T TCC S/V FNCTN

SFT SOL A/CIRC

SFT SOL B/CIRC

O/R CLUCH SOL/ CIRC

TCC SOLENOID/ CIRC

Malfunction is detected when ...

gear position even if electrical circuit is good.

if electrical circuit is good.

drop when it tries to operate the solenoid valve.

TCM self-diagnosis OBD-II (DTC)

Available by

O/D OFF

indicator lamp or

“A/T” on CONSULT-II

— P0734*1

— P0744*1

X P0750

X P0755

X P1760

X P0740

Available by

malfunction

indicator lamp*2,

“ENGINE” on CON-

SULT-II or GST

Line pressure solenoid valve I TCM detects an improper voltage LINE PRESSURE

S/V Throttle position sensor

Throttle position switch THROTTLE POSI

SEN Engine speed signal I TCM does not receive the proper ENGINE SPEED SIG A/T fluid temperature sensor I TCM receives an excessively low BATT/FLUID TEMP

SEN TCM (RAM) I TCM memory (RAM) is malfuncCONTROL UNIT

(RAM) TCM (ROM) I TCM memory (ROM) is malfuncCONTROL UNIT

(ROM)

L/PRESS SOL/ CIRC

TP SEN/CIRC A/T

ATF TEMP SEN/ CIRC

—

drop when it tries to operate the solenoid valve.

I TCM receives an excessively low

or high voltage from the sensor.

voltage signal from the ECM.

or high voltage from the sensor.

tioning.

X P0745

X P1705

X P0725

X P0710

——

AT-39

IDX

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

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

“A/T” “ENGINE”

TCM EEPROM I TCM memory (EEPROM) is malCONTROL UNIT

(EEPROM Initial start I This is not a malfunction message

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 “Malfunction Indicator Lamp (MIL)”, “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”,

—

Malfunction is detected when ...

functioning.

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

I No failure has been detected.

if another malfunction is assigned to MIL.

TCM self-diagnosis OBD-II (DTC)

Available by

O/D OFF

indicator lamp or

“A/T” on CONSULT-II

——

X—

indicator lamp*2,

“ENGINE” on CON-

SULT-II or GST

EC-69

Available by

malfunction

Item Display

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

Vehicle speed sensor 2 (Meter)

Throttle position sensor THRTL POS

A/T fluid temperature sensor

VHCL/S SE·A/T [km/h] or [mph]

VHCL/S SE·MTR [km/h] or [mph]

SEN [V]

FLUID TEMP SE [V]

DATA MONITOR MODE (A/T)

Monitor item

ECU input

signals

X—

Main sig-

nals

I Vehicle speed computed

I Throttle position sensor

I A/T fluid temperature

I Signal voltage lowers as

Description Remarks

from signal of revolution sensor is displayed.

from signal of vehicle speed sensor is displayed.

signal voltage is displayed.

sensor signal voltage is displayed.

fluid temperature rises.

NGAT0184S03

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.

Battery voltage BATTERY VOLT

[V]

Engine speed ENGINE SPEED

[rpm]

X—

I Source voltage of TCM is

I Engine speed, computed

AT-40

displayed.

from engine speed signal, is displayed.

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

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Item Display

Monitor item

ECU input

signals

Main sig-

nals

CONSULT-II (Cont’d)

Description Remarks

Overdrive control switch OVERDRIVE SW

[ON/OFF] X —

P/N position switch P/N POSI SW

[ON/OFF] X —

R position switch R POSITION SW

[ON/OFF] X —

D position switch D POSITION SW

[ON/OFF] X —

2 position switch 2 POSITION SW

[ON/OFF]

1 position switch 1 POSITION SW

[ON/OFF]

ASCD cruise signal ASCD·CRUISE

[ON/OFF]

ASCD O/D cut signal ASCD O/D CUT

[ON/OFF]

I ON/OFF state computed

I ON/OFF status, com-

X—

I ON/OFF status, com-

X—

I Status of ASCD cruise

X—

I Status of ASCD O/D

X—

from signal of overdrive control SW is displayed.

from signal of P/N position SW is displayed.

from signal of R position SW is displayed.

from signal of D position SW is displayed.

puted from signal of 2 position SW, is displayed.

puted from signal of 1 position SW, is displayed.

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

release signal is displayed. ON ... O/D released OFF ... O/D not released

I This is displayed even

when no ASCD is mounted.

I This is displayed even

when no ASCD is mounted.

Kickdown switch KICKDOWN SW

[ON/OFF] X —

Closed throttle position switch

Wide open throttle position switch

Gear position GEAR

Selector lever position SLCT LVR POSI

Vehicle speed VEHICLE

CLOSED THL/SW [ON/OFF]

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

SPEED [km/h] or [mph]

I ON/OFF status, com-

X—

I ON/OFF status, com-

X—

I Gear position data used

—X

I Selector lever position

—X

I Vehicle speed data, used

—X

AT-41

puted from signal of kickdown SW, is displayed.

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

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

for computation by TCM, is displayed.

data, used for computation by TCM, is displayed.

for computation by TCM, is displayed.

I This is displayed even

when no kickdown switch is equipped.

I A specific value used for

control is displayed if failsafe is activated due to error.

IDX

CONSULT-II (Cont’d)

Item Display

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Monitor item

ECU input

signals

Main sig-

nals

Description Remarks

Throttle position THROTTLE

POSI [/8]

Line pressure duty LINE PRES DTY

[%]

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

I Throttle position data,

—X

I Control value of line

—X

I Control value of torque

—X

I Control value of shift

—X

I Control value of shift

—X

I Control value of overrun

used for computation by TCM, is displayed.

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

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

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

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

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

I A specific value used for

control is displayed if failsafe is activated due to error.

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 (O/D OFF indicator lamp)

X: Applicable —: Not applicable

SELF-D DP LMP [ON/OFF] — X

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

1. Turn ignition switch OFF.

2. Connect CONSULT-II to Data link connector. Data link connector for CONSULT-II is located in the lower instrument panel on driver side.

I Control status of O/D

OFF indicator lamp is displayed.

NGAT0184S04

NGAT0184S0401

ABR847

AT-42

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

3. Turn ignition switch ON

4. Touch “START”.

CONSULT-II (Cont’d)

SAT586J

SAT580J

SAT587J

5. Touch “A/T”.

6. Touch “DTC WORK SUPPORT”.

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

SAT588J

SAT589J

8. Touch “START”.

AT-43

IDX

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

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

SAT590J

I 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-44

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

NGAT0184S05

1ST GR FNCTN P0731

2ND GR FNCTN P0732

3RD GR FNCTN P0733

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

ducted or not)

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

confirmed. I Self-diagnosis status (whether the diagnosis is being con-

ducted or not)

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

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

ducted or not)

I Self-diagnosis result (OK or NG)

AT-45

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

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

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

IDX

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. I Self-diagnosis status (whether the diagnosis is being con-

ducted or not)

I Self-diagnosis result (OK or NG)

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

ducted or not)

I Self-diagnosis result (OK or NG)

Diagnostic Procedure Without CONSULT-II

OBD-II SELF-DIAGNOSTIC PROCEDURE (WITH GST)

Refer to “Generic Scan Tool (GST)”, “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”,

EC-89

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

I Torque converter clutch sole-

noid valve

I Each clutch I Hydraulic control circuit

NGAT0207

NGAT0207S01

OBD-II SELF-DIAGNOSTIC PROCEDURE (NO

TOOLS)

Refer to “Malfunction Indicator Lamp (MIL)”, “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”,

EC-69

NGAT0207S02

AT-46

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)

Preparation

1. Turn ignition switch to OFF position.

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

3. Disconnect the throttle position switch harness connector.

4. Turn the ignition switch to ON position.

SEF793W

5. Check continuity of the closed throttle position switch.

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

6. Go to “TCM Self-diagnostic Procedure”, AT-47.

AAT498A

1 CHECK O/D OFF INDICATOR LAMP

1. Selector lever in P position. Start the engine. Warm engine to normal operating temperature.

2. Turn ignition switch to OFF position.

3. Wait at least 5 seconds.

NGAT0207S03

NGAT0207S0301

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

5. Does O/D OFF indicator lamp come on for about 2 seconds?

YesorNo

Yes © GO TO 2. No © Go to “1. O/D OFF Indicator Lamp Does Not Come On”, AT-206.

SAT967I

AAT612A

AT-47

IDX

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. Move selector lever from P to D position.

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

5. Depress and hold overdrive control switch in OFF position (the O/D OFF indicator lamp will be ON) until directed to release the switch (If O/D OFF indicator lamp does not come on, go to step 3 on AT-243).

6. Turn ignition switch to OFF position.

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

8. Release the overdrive control switch (the O/D OFF indicator lamp will be OFF).

I Wait for more than 2 seconds after ignition switch ON.

9. Move selector lever to 2 position.

10. Depress and release the overdrive control switch (the O/D OFF indicator lamp will be ON).

11. Depress and hold the overdrive control switch (the O/D OFF indicator lamp will be OFF) until directed to release the

switch.

SAT968I

SAT969I

AT-48

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

3 JUDGEMENT PROCEDURE STEP 2

1. Move selector lever to 1 position.

2. Release the overdrive control switch.

3. Depress and release the overdrive control switch (the O/D OFF indicator lamp will be ON).

4. Depress and release the overdrive control switch (the O/D OFF indicator lamp will be OFF).

5. Depress and hold the overdrive control switch (the O/D OFF indicator lamp will be ON) until directed to release the switch.

6. Depress accelerator pedal fully and release.

7. Release the overdrive control switch (the O/D OFF indicator lamp will begin to flash ON and OFF).

SAT970I

4 CHECK SELF-DIAGNOSIS CODE

Check O/D OFF indicator lamp. Refer to JUDGEMENT OF SELF-DIAGNOSIS CODE, AT-50.

SAT981F

AT-49

AAT612A

IDX

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

JUDGEMENT OF SELF-DIAGNOSIS CODE

O/D OFF indicator lamp:

All judgement flickers are same.

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

2nd judgement flicker is longer than others.

SAT436F

NGAT0207S04

1st judgement flicker is longer than others.

SAT437F

Revolution sensor circuit is short-circuited or disconnected.

⇒ Go to VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR) , AT-111.

3rd judgement flicker is longer than others.

SAT439F

Vehicle speed sensor circuit is short-circuited or disconnected.

⇒ Go to VEHICLE SPEED SENSOR·MTR, AT-195.

4th judgement flicker is longer than others.

SAT443F

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

⇒ Go to SHIFT SOLENOID VALVEA,AT-165.

SAT441F

Throttle position sensor circuit is short-circuited or disconnected.

⇒ Go to THROTTLE POSITION SENSOR , AT-175.

5th judgement flicker is longer than others.

SAT445F

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

⇒ Go to SHIFT SOLENOID VALVE B , AT-170.

AT-50

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

O/D OFF indicator lamp:

6th judgement flicker is longer than others.

SAT447F

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

⇒ Go to OVERRUN CLUTCH SOLENOID VALVE (DTC:

1203), AT-184.

8th judgement flicker is longer than others.

7th judgement flicker is longer than others.

SAT449F

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

⇒ Go to TORQUE CONVERTER CLUTCH SOLENOID VALVE , AT-147.

9th judgement flicker is longer than others.

SAT451F

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-189.

10th judgement flicker is longer than others.

SAT455F

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

⇒ Go to LINE PRESSURE SOLENOID VALVE , AT-160.

SAT453F

Engine speed signal circuit is short-circuited or disconnected.

⇒ Go to ENGINE SPEED SIGNAL AT-116.

Flickers as shown below.

SAT457F

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

AT-51

IDX

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Diagnostic Procedure Without CONSULT-II (Cont’d)

O/D OFF indicator lamp:

Lamp comes on.

SAT367J

PNP switch, overdrive control switch or throttle position switch circuit is disconnected or TCM is damaged.

⇒ Go to 21. TCM Self-diagnosis Does Not Activate PNP, OVERDRIVE CONTROL AND THROTTLE POSITION SWITCHES), AT-243.

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

AT-52

TROUBLE DIAGNOSIS — INTRODUCTION

AAT473A

SAT632I

Introduction

The TCM receives a signal from the vehicle speed sensor, throttle position sensor or 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-57. 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“Diagnostic Worksheet” like the example (AT-55) 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.

NGAT0019

SEF234G

AT-53

IDX

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

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

=NGAT0019S01

NGAT0019S0101

l No kickdown l No pattern select l Others

()

O/D OFF indicator lamp Blinks for about 8 seconds.

l Continuously lit l Not lit

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

AT-54

TROUBLE DIAGNOSIS — INTRODUCTION

Introduction (Cont’d)

Diagnostic Worksheet

1. l Read the Fail-safe Remarks and listen to customer complaints. AT-8

2. l CHECK A/T FLUID AT-59

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

3. Perform STALL TEST and LINE PRESSURE TEST. AT-59, AT-62

l Stall test — Mark possible damaged components/others.

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

l Line pressure test — Suspected parts:

4. l Perform all ROAD TEST and mark required procedures. AT-63

4-1. Check before engine is started. AT-64

l SELF-DIAGNOSTIC PROCEDURE - Mark detected items.

l PNP switch, AT-99. l A/T fluid temperature sensor, AT-105. l Vehicle speed sensor·A/T (Revolution sensor), AT-111. l Engine speed signal, AT-116. l Torque converter clutch solenoid valve, AT-147. l Line pressure solenoid valve, AT-160. l Shift solenoid valve A, AT-165. l Shift solenoid valve B, AT-170. l Throttle position sensor,AT-175. l Overrun clutch solenoid valve, AT-184. l A/T fluid temperature sensor and TCM power source, AT-189. l PNP, overdrive control and throttle position switches, AT-243. l Vehicle speed sensor·MTR, AT-195. l Battery l Others

4-2. Check at idle AT-66

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

brake band are OK

=NGAT0019S0102

l 1. O/D OFF Indicator Lamp Does Not Come On, AT-206. l 2. Engine Cannot Be Started In P And N Position, AT-208. l 3. In P Position, Vehicle Moves Forward Or Backward When Pushed, AT-209. l 4. In N Position, Vehicle Moves, AT-210. l 5. Large Shock. N , R Position, AT-212. l 6. Vehicle Does Not Creep Backward In R Position, AT-214. l 7. Vehicle Does Not Creep Forward In D, 2 Or 1 Position, AT-217.

AT-55

IDX

TROUBLE DIAGNOSIS — INTRODUCTION

Introduction (Cont’d)

4. 4-3. Cruise test AT-67

Part-1

AT-71

l 8. Vehicle Cannot Be Started From D l 9. A/T Does Not Shift: D l 10. A/T Does Not Shift: D l 11. A/T Does Not Shift: D

, D2Or Does Not Kickdown: D4, D2, AT-223.

2,D3

3,D4

, AT-226. , AT-229.

, AT-220.

l 12. A/T Does Not Perform Lock-up, AT-232. l 13. A/T Does Not Hold Lock-up Condition, AT-234. l 14. Lock-up Is Not Released, AT-236. l 15. Engine Speed Does Not Return To Idle (Light Braking D

, D3), AT-237.

Part-2 AT-75

l 9. A/T Does Not Shift: D l 10. A/T Does Not Shift: D l 11. A/T Does Not Shift: D l 16. Vehicle Does Not Start From D

, D2Or Does Not Kickdown: D4, D2, AT-223.

, AT-226.

2,D3

, AT-229.

3,D4

, AT-239.

Part-3 AT-77

l 17. A/T Does Not Shift: D l 15. Engine Speed Does Not Return To Idle (Engine Brake In D l 18. A/T Does Not Shift: D l 15. Engine Speed Does Not Return To Idle (Engine Brake In 2 l 19. A/T Does Not Shift: 2

When Overdrive Control Switch ON , OFF, AT-240

4,D3

, When Selector Lever D , 2 Position, AT-241.

3,22

, When Selector Lever 2 , 1 Position, AT-242.

2,11

), AT-237.

l 20. Vehicle Does Not Decelerate By Engine Brake, AT-243. l SELF-DIAGNOSTIC PROCEDURE — Mark detected items.

5. l For self-diagnosis NG items, inspect each component. Repair or replace the damaged parts. AT-38

6. l Perform all ROAD TEST and re-mark required procedures. AT-63

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

EC section

Refer to “Emission-related Diagnostic Information”, “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION”,

EC-66

l DTC (P0731, 1103) A/T 1st gear function, AT-120. l DTC (P0732, 1104) A/T 2nd gear function, AT-126. l DTC (P0733, 1105) A/T 3rd gear function, AT-132. l DTC (P0734, 1106) A/T 4th gear function, AT-138. l DTC (P0744, 1107) A/T TCC S/V function (lock-up), AT-152.

8. l Perform the Diagnostic Procedures for all remaining items marked NG. Repair or replace the damaged

parts.

AT-92

AT-81 Refer to the Symptom Chart when you perform the procedures. (The chart also shows some other possible symptoms and the component inspection orders.)

9. l Erase DTC from TCM and ECM memories. AT-35

AT-56

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-54) and “DIAGNOSTIC WORKSHEET” (AT-55), to perform the best troubleshooting possible.

NGAT0020

NGAT0020S01

AT-57

IDX

Work Flow (Cont’d)

TROUBLE DIAGNOSIS — INTRODUCTION

WORK FLOW CHART

NGAT0020S02

*1: AT-54 *2: AT-55 *3: AT-8 *4: AT-59 *5: AT-59, 62 *6: AT-63

*7: AT-37 *8: AT-33 *9: AT-50 *10: AT-99 *11: AT-195 *12: AT-203

AAT550A

*13: AT-243 *14: AT-81 *15: AT-35 *16: AT-100 *17: AT-195

AT-58

TROUBLE DIAGNOSIS — BASIC INSPECTION

A/T Fluid Check

SAT638A

A/T Fluid Check

FLUID LEAKAGE CHECK

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

Dark or black with burned odor Wear of frictional material

Milky pink

Varnished fluid, light to dark brown and tacky

FLUID LEVEL CHECK

Refer to MA section (“Checking A/T Fluid”, “CHASSIS AND BODY MAINTENANCE”).

Water contamination — Road water entering through filler tube or breather

Oxidation — Over or under filling, — Overheating

NGAT0021

NGAT0021S01

NGAT0021S02

NGAT0021S03

SAT647B

Stall Test

STALL 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 engine oil andATF reach operating temperature.

ATF operating temperature:

50 - 80°C (122 - 176°F)

3. Set parking brake and block wheels.

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

I It is good practice to put a mark on point of specified

engine rpm on indicator.

NGAT0022

NGAT0022S01

SAT513G

IDX

AT-59

Stall Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

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.

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

seconds.

Stall revolution:

2,440 - 2,640 rpm

SAT514G

8. Move selector lever to N position.

9. Cool off ATF.

I Run engine at idle for at least one minute.

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

SAT771B

JUDGEMENT OF STALL TEST

NGAT0022S02

The test result and possible damaged components relating to each result are shown in the illustration. In order to pinpoint the possible damaged components, follow the WORK FLOW shown in AT-57.

NOTE: Stall revolution is too high in D or 2 position:

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

Low one-way clutch slippage

I Slippage occurs at the following gears:

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

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

clutch or forward one-way clutch slippage

Stall revolution is too high in R position:

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

brake slippage

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

page

Stall revolution within specifications:

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

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

CAUTION:

Be careful since automatic fluid temperature increases abnormally.

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

clutch slippage

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

band slippage

Stall revolution less than specifications:

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

torque converter

AT-60

TROUBLE DIAGNOSIS — BASIC INSPECTION

Stall Test (Cont’d)

AT-61

SAT392H

IDX

Line Pressure Test

TROUBLE DIAGNOSIS — BASIC INSPECTION

SAT209GA

SAT647B

Line Pressure Test

LINE PRESSURE TEST PORTS

NGAT0023

NGAT0023S03

I Location of line pressure test ports. I Always replace line pressure plugs as they are self-seal-

ing bolts.

LINE PRESSURE TEST PROCEDURE

NGAT0023S01

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

2. Drive vehicle for approx. 10 minutes or until engine oil andATF reach operating temperature.

ATF operating temperature:

50 - 80°C (122 - 176°F)

3. Install pressure gauge to corresponding line pressure port.

SAT518GB

SAT519GB

SAT513G

4. Set parking brake and block wheels.

I Continue to depress brake pedal fully while line pressure

test is being performed at stall speed.

AT-62

TROUBLE DIAGNOSIS — BASIC INSPECTION

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

I When measuring line pressure at stall speed, follow the

stall test procedure.

Line pressure:

Refer to SDS, AT-338.

Line Pressure Test (Cont’d)

At idle

At stall speed

SAT493G

JUDGEMENT OF LINE PRESSURE TEST

Judgement Suspected parts

Line pressure is low in all positions.

Line pressure is low in particular position.

Line pressure is high. I Maladjustment of throttle position sensor

Line pressure is low. I Maladjustment of throttle position sensor

I Oil pump wear I Control piston damage I Pressure regulator valve or plug sticking I Spring for pressure regulator valve damaged I Fluid pressure leakage between oil strainer and pressure regulator valve I Clogged strainer

I Fluid pressure leakage between manual valve and particular clutch I For example, line pressure is:

— Low in R and 1 positions, but — Normal in D and 2 positions. Then, fluid leakage exists at or around low and reverse brake circuit. Refer to “CLUTCH AND BAND CHART”, AT-17.

I Fluid temperature sensor damaged I Line pressure solenoid valve sticking I Short circuit of line pressure solenoid valve circuit I Pressure modifier valve sticking I Pressure regulator valve or plug sticking I Open in dropping resistor circuit

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

NGAT0023S02

SAT786A

Road Test

DESCRIPTION

NGAT0024

NGAT0024S01

I The purpose of this test is to determine overall performance of

the A/T and analyze causes of problems.

I The road test consists of the following three parts: a) Check before engine is started b) Check at idle c) Cruise test

AT-63

IDX

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

SAT496G

1 CHECK O/D OFF INDICATOR LAMP

1. Park vehicle on flat surface.

2. Move selector lever to P position.

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

I Before road test, familiarize yourself with all test procedures

and items to check.

I 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-33 - AT-46 and AT-203 - AT-243.

1. CHECK BEFORE ENGINE IS STARTED

NGAT0024S02

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

5. Does O/D OFF indicator lamp come on for about 2 seconds?

YesorNo

Yes © GO TO 2. No © Go to “1. O/D OFF Indicator Lamp Does Not Come On”, AT-206.

SAT967I

AAT612A

AT-64

TROUBLE DIAGNOSIS — BASIC INSPECTION

2 CHECK O/D OFF INDICATOR LAMP

Does O/D OFF indicator lamp flicker for about 8 seconds?

Road Test (Cont’d)

YesorNo

Yes © Perform self-diagnosis. Refer to TCM Self-Diagnosis Procedure (No Tools), AT-47. No © GO TO 3.

3 CHECK NG ITEM

1. Turn ignition switch to OFF position.

2. Perform self-diagnosis and note NG items. Refer to TCM Self-Diagnosis Procedure (No Tools), AT-47.

AAT612A

AT-65

IDX

Road Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

2. CHECK AT IDLE

1 CHECK ENGINE START

1. Park vehicle on flat surface.

2. Turn ignition switch to OFF position.

3. Move selector lever to P or N position.

4. Turn ignition switch to start position.

5. Is engine started?

YesorNo

Yes © GO TO 2. No © Go to “2. Engine Cannot Be Started In P and N Position”, AT-208.

2 CHECK ENGINE START

1. Turn ignition switch to OFF position.

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

3. Turn ignition switch to start position.

4. Is engine started?

YesorNo

Yes © Go to “2. Engine Cannot Be Started In P and N Position”, AT-208. No © GO TO 3.

3 CHECK VEHICLE MOVE

1. Turn ignition switch to OFF position.

2. Move selector lever to P position.

3. Release parking brake.

4. Push vehicle forward or backward.

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

=NGAT0024S03

SAT796A

YesorNo

Yes © Go to “3. In P Position, Vehicle Moves Forward Or Backward When Pushed”, AT-209. No © GO TO 4.

4 CHECK VEHICLE MOVE

1. Apply parking brake.

2. Move selector lever to N position.

3. Turn ignition switch to START position and start engine.

4. Release parking brake.

5. Does vehicle move forward or backward?

YesorNo

Yes © Go to “4. In N Position, Vehicle Moves”, AT-210. No © GO TO 5.

AT-66

TROUBLE DIAGNOSIS — BASIC INSPECTION

5 CHECK SHIFT SHOCK

1. Apply foot brake.

2. Move selector lever to R position.

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

YesorNo

Yes © Go to “5. Large Shock. N , R Position”, AT-212. No © GO TO 6.

Road Test (Cont’d)

SAT082J

6 CHECK VEHICLE MOVE

1. Release foot brake for several seconds.

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

YesorNo

Yes © GO TO 7. No © Go to “6. Vehicle Does Not Creep Backward In R Position”, AT-214.

7 CHECK VEHICLE MOVE

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

2. Does vehicle creep forward in all three positions?

YesorNo

Yes © Go to “3. Cruise test”, AT-67. No © Go to “7. Vehicle Does Not Creep Forward In D, 2 Or 1 Position”, AT-217.

SAT601J

3. CRUISE TEST

I Check all items listed in Parts 1 through 3.

With CONSULT-II

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

as per “Shift Schedule”.

NGAT0024S04

NGAT0024S0401

AT-67

IDX

Road Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

ABR847

SAT586J

CONSULT-II Setting Procedure

1. Turn ignition switch OFF.

2. Connect “CONSULT-II” to Data Link Connector. Data link connector is located in the lower instrument panel on driver side.

3. Turn ignition switch ON.

4. Touch “START”.

5. Touch “A/T”.

NGAT0024S0402

SAT580J

SAT587J

SAT602J

6. Touch “DATA MONITOR”.

7. Touch “MAIN SIGNALS” to set recording condition.

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

9. Touch “Start”.

AT-68

TROUBLE DIAGNOSIS — BASIC INSPECTION

10. When performing cruise test, touch “Store Data”.

Road Test (Cont’d)

SAT603J

SAT604J

SAT605J

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

SAT606J

SAT607J

12. Touch “Display Data”.

AT-69

IDX

Road Test (Cont’d)

TROUBLE DIAGNOSIS — BASIC INSPECTION

13. Touch “SAVE REC DATA”.

SAT608J

14. Touch “PRINT SCREEN” again.

SAT609J

SAT610J

AAT474A

15. Check the monitor data printed out.

16. Continue cruise test part 2 and 3.

Without CONSULT-II

NGAT0024S0403

I Throttle position sensor can be checked by measuring voltage

across terminals 41 and 42 of TCM.

AT-70

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

Cruise Test — Part 1

1 CHECK STARTING GEAR (D1) POSITION

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

ATF operating temperature:

50 - 80°C (122 - 176°F)

2. Park vehicle on flat surface.

3. Set overdrive control switch to ON position.

4. Move selector lever to P position.

5. Start engine.

6. Move selector lever to D position.

=NGAT0024S0404

SAT001J

7. Accelerate vehicle by constantly depressing accelerator pedal halfway.

8. Does vehicle start from D1?

Read gear position.

YesorNo

Yes © GO TO 2. No © Go to “8. Vehicle Cannot Be Started From D

”, AT-220.

SAT952I

SAT953I

AT-71

IDX

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

2 CHECK SHIFT UP (D1TO D2)

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

Read gear position, throttle opening and vehicle speed.

Specified speed when shifting from D

Refer to Shift schedule, AT-338.

Yes © GO TO 3. No © Go to “9. A/T Does Not Shift: D

3 CHECK SHIFT UP (D2TO D3)

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

Read gear position, throttle opening and vehicle speed.

Specified speed when shifting from D

Refer to Shift schedule, AT-338.

to D2:

to D3:

YesorNo

, D2or Does Not Kickdown: D4, D2”, AT-223.

SAT954I

YesorNo

Yes © GO TO 4. No © Go to “10. A/T Does Not Shift: D

, D3”, AT-226.

SAT955I

AT-72

TROUBLE DIAGNOSIS — BASIC INSPECTION

4 CHECK SHIFT UP (D3TO D4)

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

Read gear position, throttle opening and vehicle speed.

Specified speed when shifting from D

Refer to Shift schedule, AT-338.

Yes © GO TO 5. No © Go to “11. A/T Does Not Shift: D

5 CHECK LOCK-UP (D4TO D4L/U)

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

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

Specified speed when lock-up occurs:

Refer to Shift schedule, AT-338.

to D4:

YesorNo

, D4”, AT-229.

Road Test (Cont’d)

SAT956I

YesorNo

Yes © GO TO 6. No © Go to “12. A/T Does Not Perform Lock-up”, AT-232.

6 CHECK HOLD LOCK-UP

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

YesorNo

Yes © GO TO 7. No © Go to “13. A/T Does Not Hold Lock-up Condition”, AT-234.

SAT957I

AT-73

IDX

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

7 CHECK LOCK-UP OFF (D4L/U TO D4)

1. Release accelerator pedal.

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

YesorNo

Yes © GO TO 8. No © Go to “14. Lock-up Is Not Released”, AT-236.

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 D

Read gear position and engine speed.

SAT958I

to D3?

YesorNo

Yes © 1. Stop vehicle.

2. Go to “Cruise test — Part 2”, AT-75.

No © Go to “15. Engine Speed Does Not Return To Idle (Light Braking D

, D3)”, AT-237.

SAT959I

AT-74

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

Cruise Test — Part 2

1 CHECK STARTING GEAR (D1) POSITION

1. Confirm overdrive control switch is in ON position.

2. Confirm selector lever is in D position.

3. Accelerate vehicle by half throttle again.

4. Does vehicle start from D

Read gear position.

Yes © GO TO 2. No © Go to “16. Vehicle Does Not Start From D

YesorNo

”, AT-239.

=NGAT0024S0405

SAT495G

2 CHECK SHIFT UP AND SHIFT DOWN (D3TO D4TO D2)

1. Accelerate vehicle to 80 km/h (50 MPH) as shown in illustration.

2. Release accelerator pedal and then quickly depress it fully.

3. Does A/T shift from D

Read gear position and throttle position.

Yes © GO TO 3. No © Go to “9. A/T Does Not Shift: D

to D2as soon as accelerator pedal is depressed fully?

YesorNo

, D4Or Does Not Kickdown: D4, D2”, AT-223.

SAT404H

AT-75

IDX

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

3 CHECK SHIFT UP (D2TO D3)

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

Read gear position, throttle position and vehicle speed.

Specified speed when shifting from D

Refer to Shift schedule, AT-338.

Yes © GO TO 4. No © Go to “10. A/T Does Not Shift: D

4 CHECK SHIFT UP (D3TO D4) AND ENGINE BRAKE

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

to D4and does vehicle decelerate by engine brake?

Read gear position, throttle position and vehicle speed.

to D3:

YesorNo

, D3”, AT-226.

SAT960I

YesorNo

Yes © 1. Stop vehicle.

2. Go to “Cruise test — Part 3”, AT-77.

No © Go to “11. A/T Does Not Shift: D

AT-76

, D4”, AT-229.

SAT405H

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

Cruise Test — Part 3

1 VEHICLE SPEED D4POSITION

1. Confirm overdrive control switch is in ON position.

2. Confirm selector lever is in D position.

3. Accelerate vehicle using half-throttle to D

2 CHECK SHIFT DOWN (D4TO D3)

1. Release accelerator pedal.

2. Set overdrive control switch to OFF position while driving in D

3. Does A/T shift from D

Read gear position and vehicle speed.

to D3(O/D OFF)?

=NGAT0024S0406

SAT812A

YesorNo

Yes © GO TO 3. No © Go to “17. A/T Does Not Shift: D

AT-240.

, D3, When Overdrive Control Switch ON , OFF,

SAT999I

AT-77

IDX

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

3 CHECK ENGINE BRAKE

Does vehicle decelerate by engine brake?

YesorNo

Yes © GO TO 4. No © Go to “15. Engine Speed Does Not Return To Idle (Light Braking D

4 CHECK SHIFT DOWN (D3TO D2)

1. Move selector lever from D to 2 position while driving in D3(O/D OFF).

2. Does A/T shift from D

Read gear position.

(O/D OFF) to 22?

, D3)”, AT-237.

SAT999I

YesorNo

Yes © GO TO 5. No © Go to “18. A/T Does Not Shift: D

AT-241.

, D2, When Selector Lever “D” , “2” Position”,

SAT791GA

AT-78

TROUBLE DIAGNOSIS — BASIC INSPECTION

5 CHECK ENGINE BRAKE

Does vehicle decelerate by engine brake?

Road Test (Cont’d)

YesorNo

Yes © GO TO 6. No © Go to “15. Engine Speed Does Not Return To Idle (Light Braking D

6 CHECK SHIFT DOWN (22TO 11)

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

2. Does A/T shift from 2

Yes © GO TO 7. No © Go to “19. A/T Does Not Shift: 2

to 11position?

YesorNo

, 11, When Selector lever 2 , 1 Position”, AT-242.

, D3)”, AT-237.

SAT791GA

SAT778B

AT-79

IDX

TROUBLE DIAGNOSIS — BASIC INSPECTION

Road Test (Cont’d)

7 CHECK ENGINE BRAKE

Does vehicle decelerate by engine brake?

YesorNo

2. Perform self-diagnosis. Refer to TCM Self-Diagnosis Procedure (No Tools), AT-47.

SAT778B

AT-80

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart

Numbers are arranged in the order of inspection. Perform inspections starting with number one and work up. Diagnostic item Nos. in OFF vehicle indicate that the transmission must be removed for the inspection.

Symptom Condition Diagnostic Item Reference Page

Engine does not start in P, N positions. AT-208

Engine starts in position other than P and N positions. AT-208

Transmission noise in P and N positions.

ON vehicle

OFF vehicle

1. Ignition switch and starter

2. Control linkage AT-260

3. PNP switch AT-260

1. Control linkage AT-260

2. PNP switch AT-260

1. Fluid level and fluid condition AT-59

2. Line pressure AT-62

3. Throttle position sensor (Adjustment)

4. Revolution sensor and vehicle speed sensor

5. Engine speed signal AT-116

6. Oil pump AT-279

7. Torque converter AT-268

SC-6

EC-178

AT-111, AT-195

NGAT0026

Vehicle moves when changing into P position or parking gear does not disengage when shifted out of P position. AT-208

Vehicle runs in N position. AT-210

Vehicle will not run in R position (but runs in D, 2 and 1 positions). Clutch slips. Very poor acceleration. AT-214

ON vehicle 1. Control linkage AT-260

OFF vehicle 2. Parking components AT-319

ON vehicle

OFF vehicle

ON vehicle

OFF vehicle

1. Control linkage AT-260

2. Accumulator 3-4 (N-R) AT-258

3. Forward clutch AT-302

4. Reverse clutch AT-296

5. Overrun clutch AT-302

1. Control linkage AT-260

2. Line pressure AT-62

3. Line pressure solenoid valve AT-160

4. Control valve assembly AT-258

5. Reverse clutch AT-296

6. High clutch AT-300

7. Forward clutch AT-302

8. Overrun clutch AT-302

9. Low & reverse brake AT-306

AT-81

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Symptom Condition Diagnostic Item Reference Page

1. Fluid level and fluid condition AT-59

2. Control linkage AT-260

Vehicle braked when shifting into R position.

Sharp shock in shifting from N to D position.

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

ON vehicle

OFF vehicle

ON vehicle

OFF vehicle 9. Forward clutch AT-302 ON vehicle 1. Control linkage AT-260 OFF vehicle 2. Low one-way clutch AT-310

3. Line pressure AT-62

4. Line pressure solenoid valve AT-160

5. Control valve assembly AT-258

6. High clutch AT-300

7. Brake band AT-315

8. Forward clutch AT-302

9. Overrun clutch AT-302

1. Engine idling rpm AT-62

2. Throttle position sensor (Adjustment)

3. Line pressure AT-62

4. A/T fluid temperature sensor AT-105

5. Engine speed signal AT-116

6. Line pressure solenoid valve AT-160

7. Control valve assembly AT-258

8. Accumulator N-D AT-258

EC-178

Vehicle will not run in D, 1, 2 positions (but runs in R position). Clutch slips. Very poor acceleration. AT-217

ON vehicle

OFF vehicle

1. Fluid level and fluid condition AT-59

2. Line pressure AT-62

3. Line pressure solenoid valve AT-160

4. Control valve assembly AT-258

5. Accumulator N-D AT-258

6. Reverse clutch AT-296

7. High clutch AT-300

8. Forward clutch AT-302

9. Forward one-way clutch AT-302

10. Low one-way clutch AT-310

AT-82

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Symptom Condition Diagnostic Item Reference Page

1. Fluid level and fluid condition AT-59

2. Control linkage AT-260

3. Throttle position sensor (Adjustment)

ON vehicle

Clutches or brakes slip somewhat in starting.

OFF vehicle

Excessive creep. ON vehicle 1. Engine idling rpm

ON vehicle

No creep at all. AT-214, AT-217

OFF vehicle

4. Line pressure AT-62

5. Line pressure solenoid valve AT-160

6. Control valve assembly AT-258

7. Accumulator N-D AT-258

8. Accumulator 3-4 (N-R) AT-258

9. Forward clutch AT-302

10. Reverse clutch AT-296

11. Low & reverse brake AT-306

12. Oil pump AT-279

13. Torque converter AT-268

1. Fluid level and fluid condition AT-59

2. Line pressure AT-62

3. Control valve assembly AT-258

4. Forward clutch AT-302

5. Oil pump AT-279

EC-178

EC-614

Failure to change gear from D D

6. Torque converter AT-268

1. PNP switch AT-260

2. Control linkage AT-260

ON vehicle

OFF vehicle 6. Brake band AT-315

ON vehicle

OFF vehicle

3. Shift solenoid valve A AT-165

4. Control valve assembly AT-258

5. Revolution sensor and speed sensor AT-111, AT-195

1. PNP switch AT-260

2. Control linkage AT-260

3. Shift solenoid valve B AT-170

4. Control valve assembly AT-258

5. Revolution sensor and speed sensor AT-105, AT-195

6. High clutch AT-300

7. Brake band AT-315

AT-83

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Symptom Condition Diagnostic Item Reference Page

1. PNP switch AT-260

2. Control linkage AT-260

Failure to change gear from D D

Too high a gear change point from D

to D2, from D2to D3, from D3to

AT-223, AT-226, AT-229

Gear change directly from D

to D

occurs.

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

ON vehicle

3. Shift solenoid valve A AT-165

4. Revolution sensor and speed sensor AT-111, AT-195

5. A/T fluid temperature sensor AT-105

OFF vehicle 6. Brake band AT-315

1. Throttle position sensor (Adjustment)

2. Revolution sensor and speed sensor AT-111, AT-195

ON vehicle

3. Shift solenoid valve A AT-165

4. Shift solenoid valve B AT-170

1. Fluid level and fluid condition AT-59

ON vehicle

2. Accumulator 1-2 AT-258

OFF vehicle 3. Brake band AT-315

1. Engine idling rpm AT-62

ON vehicle

2. Torque converter clutch solenoid valve AT-147

3. Control valve assembly AT-258

OFF vehicle 4. Torque converter AT-268

1. Throttle position sensor (Adjustment)

2. Line pressure AT-62

EC-178

Too sharp a shock in change from D

to D2.

Too sharp a shock in change from D

to D3.

Too sharp a shock in change from D

to D4.

ON vehicle

3. Accumulator 1-2 AT-258

4. Control valve assembly AT-258

5. A/T fluid temperature sensor AT-105

OFF vehicle 6. Brake band AT-315

1. Throttle position sensor (Adjustment)

EC-178

2. Line pressure AT-62

ON vehicle

3. Accumulator 2-3 AT-258

4. Control valve assembly AT-258

5. High clutch AT-300

OFF vehicle

6. Brake band AT-315

1. Throttle position sensor (Adjustment)

EC-178

2. Line pressure AT-62

ON vehicle

3. Accumulator 3-4 (N-R) AT-258

4. Control valve assembly AT-258

5. Brake band AT-315

OFF vehicle

6. Overrun clutch AT-302

AT-84

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Symptom Condition Diagnostic Item Reference Page

Almost no shock or clutches slipping in change from D

Almost no shock or slipping in change from D

to D3.

to D4.

to D2.

1. Fluid level and fluid condition AT-59

2. Throttle position sensor (Adjustment)

ON vehicle

OFF vehicle 6. Brake band AT-315

ON vehicle

OFF vehicle

ON vehicle

OFF vehicle

ON vehicle 1. Fluid level and fluid condition AT-59

3. Line pressure AT-62

4. Accumulator 1-2 AT-258

5. Control valve assembly AT-258

1. Fluid level and fluid condition AT-59

2. Throttle position sensor (Adjustment)

3. Line pressure AT-62

4. Accumulator 2-3 AT-258

5. Control valve assembly AT-258

6. High clutch AT-300

7. Brake band AT-315

1. Fluid level and fluid condition AT-59

2. Throttle position sensor (Adjustment)

3. Line pressure AT-62

4. Accumulator 3-4 (N-R) AT-258

5. Control valve assembly AT-258

6. High clutch AT-300

7. Brake band AT-315

EC-178

Vehicle braked by gear change from D

to D2.

Vehicle braked by gear change from D

to D3.

Vehicle braked by gear change from D

to D4.

2. Reverse clutch AT-296

OFF vehicle

ON vehicle 1. Fluid level and fluid condition AT-59 OFF vehicle 2. Brake band AT-315 ON vehicle 1. Fluid level and fluid condition AT-59

OFF vehicle

3. Low & reverse brake AT-306

4. High clutch AT-300

5. Low one-way clutch AT-310

2. Overrun clutch AT-302

3. Forward one-way clutch AT-302

4. Reverse clutch AT-296

AT-85

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Symptom Condition Diagnostic Item Reference Page

1. Fluid level and fluid condition AT-59

2. PNP switch AT-260

Maximum speed not attained. Acceleration poor.

Failure to change gear from D D

ON vehicle

OFF vehicle

ON vehicle

OFF vehicle

3. Shift solenoid valve A AT-165

4. Shift solenoid valve B AT-170

5. Control valve assembly AT-258

6. Reverse clutch AT-296

7. High clutch AT-300

8. Brake band AT-315

9. Low & reverse brake AT-306

10. Oil pump AT-279

11. Torque converter AT-268

1. Fluid level and fluid condition AT-59

2. Throttle position sensor (Adjustment)

EC-178

3. Overrun clutch solenoid valve AT-184

4. Shift solenoid valve A AT-165

5. Line pressure solenoid valve AT-160

6. Control valve assembly AT-258

7. Low & reverse brake AT-306

8. Overrun clutch AT-302

Failure to change gear from D D

or from D4to D2.

Failure to change gear from D D

or from D3to D1.

Gear change shock felt during deceleration by releasing accelerator pedal.

ON vehicle

OFF vehicle

ON vehicle

OFF vehicle

ON vehicle

1. Fluid level and fluid condition AT-59

2. Throttle position sensor (Adjustment)

EC-178

3. Shift solenoid valve A AT-165

4. Shift solenoid valve B AT-170

5. Control valve assembly AT-258

6. High clutch AT-300

7. Brake band AT-315

1. Fluid level and fluid condition AT-59

2. Throttle position sensor (Adjustment)

EC-178

3. Shift solenoid valve A AT-165

4. Shift solenoid valve B AT-170

5. Control valve assembly AT-258

6. Low one-way clutch AT-310

7. High clutch AT-300

8. Brake band AT-315

1. Throttle position sensor (Adjustment)

EC-178

2. Line pressure AT-62

3. Overrun clutch solenoid valve AT-184

4. Control valve assembly AT-258

AT-86

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Symptom Condition Diagnostic Item Reference Page

Too high a change point from D D

, from D3to D2, from D2to D1.

Kickdown does not operate when depressing pedal in D down vehicle speed.

Kickdown operates or engine overruns when depressing pedal in D beyond kickdown vehicle speed limit.

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

within kick-

to D3when

ON vehicle

OFF vehicle

1. Throttle position sensor (Adjustment)

2. Revolution sensor and speed sensor AT-111, AT-195

1. Throttle position sensor (Adjustment)

2. Revolution sensor and speed sensor AT-111, AT-195

3. Shift solenoid valve A AT-165

4. Shift solenoid valve B AT-170

1. Revolution sensor and speed sensor AT-111, AT-195

2. Throttle position sensor (Adjustment)

3. Shift solenoid valve A AT-165

4. Shift solenoid valve B AT-170

1. Fluid level and fluid condition AT-59

2. Throttle position sensor (Adjustment)

3. Line pressure AT-62

4. Line pressure solenoid valve AT-160

5. Control valve assembly AT-258

6. High clutch AT-300

7. Forward clutch AT-302

EC-178

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

to D2when

ON vehicle

OFF vehicle

ON vehicle

OFF vehicle

1. Fluid level and fluid condition AT-59

2. Throttle position sensor (Adjustment)

3. Line pressure AT-62

4. Line pressure solenoid valve AT-160

5. Shift solenoid valve A AT-165

6. Control valve assembly AT-258

7. Brake band AT-315

8. Forward clutch AT-302

1. Fluid level and fluid condition AT-59

2. Throttle position sensor (Adjustment)

3. Line pressure AT-62

4. Line pressure solenoid valve AT-160

5. Control valve assembly AT-258

6. A/T fluid temperature sensor AT-105

7. Accumulator 2-3 AT-258

8. Brake band AT-315

9. Forward clutch AT-302

EC-178

10. High clutch AT-300

AT-87

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Symptom Condition Diagnostic Item Reference Page

1. Fluid level and fluid condition AT-59

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

Vehicle will not run in any position.

Transmission noise in D, 2, 1 and R positions.

or D3to D1when

2. Throttle position sensor (Adjustment)

ON vehicle

OFF vehicle

ON vehicle

OFF vehicle

ON vehicle 1. Fluid level and fluid condition AT-59 OFF vehicle 2. Torque converter AT-268

3. Line pressure AT-62

4. Line pressure solenoid valve AT-160

5. Control valve assembly AT-258

6. Forward clutch AT-302

7. Forward one-way clutch AT-302

8. Low one-way clutch AT-310

1. Fluid level and fluid condition AT-59

2. Control linkage AT-260

3. Line pressure AT-62

4. Line pressure solenoid valve AT-160

5. Oil pump AT-279

6. High clutch AT-300

7. Brake band AT-315

8. Low & reverse brake AT-306

9. Torque converter AT-268

EC-178

Failure to change from D when changing lever into 2 position. AT-237

Gear change from 2 position.

to 23in 2

to 2

1. PNP switch AT-260

2. Throttle position sensor (Adjustment)

3. Torque converter clutch solenoid valve AT-147

ON vehicle

OFF vehicle

ON vehicle 1. PNP switch AT-260

4. Shift solenoid valve B AT-170

5. Shift solenoid valve A AT-165

6. Control valve assembly AT-258

7. Control linkage AT-260

8. Brake band AT-315

9. Overrun clutch AT-302

EC-178

AT-88

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Symptom Condition Diagnostic Item Reference Page

Engine brake does not operate in 1 position. AT-239

Gear change from 1 position.

Does not change from 1 position.

Large shock changing from 1 in 1 position.

to 12in 1

to 11in 1

to 1

1. PNP switch AT-260

2. Control linkage AT-260

3. Throttle position sensor (Adjustment)

ON vehicle

OFF vehicle

ON vehicle

OFF vehicle

ON vehicle 1. Control valve assembly AT-258

OFF vehicle 2. Low & reverse brake AT-306

4. Revolution sensor and speed sensor AT-105, AT-195

5. Shift solenoid valve A AT-165

6. Control valve assembly AT-258

7. Overrun clutch solenoid valve AT-184

8. Overrun clutch AT-302

9. Low & reverse brake AT-306

1. PNP switch AT-260

2. Control linkage AT-260

1. PNP switch AT-260

2. Revolution sensor and speed sensor AT-111, AT-195

3. Shift solenoid valve A AT-165

4. Control valve assembly AT-258

5. Overrun clutch solenoid valve AT-184

6. Overrun clutch AT-302

7. Low & reverse brake AT-306

1. Fluid level and fluid condition AT-59

EC-178

Transmission overheats.

ON vehicle

OFF vehicle

2. Engine idling rpm AT-62

3. Throttle position sensor (Adjustment)

4. Line pressure AT-62

5. Line pressure solenoid valve AT-160

6. Control valve assembly AT-258

7. Oil pump AT-279

8. Reverse clutch AT-296

9. High clutch AT-300

10. Brake band AT-315

11. Forward clutch AT-302

12. Overrun clutch AT-302

13. Low & reverse brake AT-306

14. Torque converter AT-268

EC-178

AT-89

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Symptom Condition Diagnostic Item Reference Page

ON vehicle 1. Fluid level and fluid condition AT-59

2. Reverse clutch AT-296

ATF shoots out during operation. White smoke emitted from exhaust pipe during operation.

Offensive smell at fluid charging pipe.

3. High clutch AT-300

OFF vehicle

ON vehicle 1. Fluid level and fluid condition AT-59

OFF vehicle

4. Brake band AT-315

5. Forward clutch AT-302

6. Overrun clutch AT-302

7. Low & reverse brake AT-306

2. Torque converter AT-268

3. Oil pump AT-279

4. Reverse clutch AT-296

5. High clutch AT-300

6. Brake band AT-315

7. Forward clutch AT-302

8. Overrun clutch AT-302

9. Low & reverse brake AT-306

1. Throttle position sensor (Adjustment)

2. Revolution sensor and speed sensor AT-111, AT-195

3. PNP switch AT-260

EC-178

Torque converter is not locked up.

Torque converter clutch piston slip.

Lock-up point is extremely high or low. AT-232

ON vehicle

OFF vehicle 9. Torque converter AT-268

ON vehicle

OFF vehicle 7. Torque converter AT-268

ON vehicle

4. Engine speed signal AT-116

5. A/T fluid temperature sensor AT-105

6. Line pressure AT-62

7. Torque converter clutch solenoid valve AT-147

8. Control valve assembly AT-258

1. Fluid level and fluid condition AT-59

2. Line pressure AT-62

3. Torque converter clutch solenoid valve AT-147

4. Line pressure solenoid valve AT-160

5. Line pressure solenoid valve AT-160

6. Control valve assembly AT-258

1. Throttle position sensor (Adjustment)

2. Revolution sensor and speed sensor AT-111, AT-195

3. Torque converter clutch solenoid valve AT-147

4. Control valve assembly AT-258

EC-178

AT-90

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Chart (Cont’d)

Symptom Condition Diagnostic Item Reference Page

A/T does not shift to D ing with overdrive control switch ON.

Engine is stopped at R, D, 2 and 1 positions.

when driv-

ON vehicle

OFF vehicle

ON vehicle

1. Throttle position sensor (Adjustment)

2. PNP switch AT-260

3. Revolution sensor and speed sensor AT-111, AT-195

4. Shift solenoid valve A AT-165

5. Overrun clutch solenoid valve AT-184

6. Control valve assembly AT-258

7. A/T fluid temperature sensor AT-105

8. Line pressure AT-62

9. Brake band AT-315

10. Overrun clutch AT-302

1. Fluid level and fluid condition AT-59

2. Torque converter clutch solenoid valve AT-147

3. Shift solenoid valve B AT-170

4. Shift solenoid valve A AT-165

5. Control valve assembly AT-258

EC-178

AT-91

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

TCM Terminals and Reference Value

AAT475A

TCM Terminals and Reference Value

PREPARATION

=NGAT0027

NGAT0027S01

I Measure voltage between each terminal and terminal 25 or 48

by following “TCM INSPECTION TABLE”.

TCM HARNESS CONNECTOR TERMINAL LAYOUT

NGAT0027S02

AAT494A

TCM INSPECTION TABLE

(Data are reference values.)

Terminal

No.

1 GY/R

2 BR/Y

3 G/OR

5*1 PU/W DT1 6*1 P/B DT2 — — 7*1 G/R DT3 — —

Wire color Item Condition

When releasing accelerator pedal

Line pressure solenoid valve

Line pressure solenoid valve (with dropping resistor

Torque converter clutch solenoid valve

—

after warming up engine. When depressing accelerator pedal

fully after warming up engine. When releasing accelerator pedal

after warming up engine. When depressing accelerator pedal

fully after warming up engine. When A/T performs lock-up Battery voltage When A/T does not performs

lock-up

When turning ignition ON. Battery voltage

1.5 - 2.5V

0.5V or less

5 - 14V

0.5V or less

1V or less

——

NGAT0027S03

Judgement

standard

10 W/R Power source

When turning ignition OFF. 1V or less

AT-92

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

TCM Terminals and Reference Value (Cont’d)

Terminal

No.

11 L/W

12 L/Y

13 Y

15*1 Y/G OBD-II — — —

16 BR/W

Wire color Item Condition

When shift solenoid valve A operates.

Shift solenoid valve A

Shift solenoid valve B

O/D OFF indicator lamp

Closed throttle position switch (in throttle position switch)

(When driving in D When shift solenoid valve A does

not operates. (When driving in D

When shift solenoid valve B operates. (When driving in D

When shift solenoid valve B does not operates. (When driving in D

When setting overdrive control switch in OFF position.

When setting overdrive control switch in ON position.

When releasing accelerator pedal after warming up engine. [Refer to “Preparation”, “TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)”, AT-47]

When depressing accelerator pedal after warming up engine. [Refer to “Preparation”, “TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)”, AT-47]

or D4.)

or D3.)

or D2.)

or D4.)

Judgement

Battery voltage

1V or less

Battery voltage

1V or less

Battery voltage

1V or less

standard

Wide open throttle

17 OR/B

18 B/Y

19 W/R Power source

20 L/B

position switch (in throttle position switch)

ASCD cruise signal

Overrun clutch solenoid valve

When depressing accelerator pedal more than half-way after warming up engine.

When releasing accelerator pedal after warming up engine.

When ASCD cruise is being performed. (“CRUISE ” light comes on.)

When ASCD cruise is not being performed. (“CRUISE ” light does not comes on.)

Battery voltage

1V or less

Battery voltage

1V or less

When turning ignition ON. Battery voltage

When turning ignition OFF. 1V or less

When overrun clutch solenoid valve operates.

When overrun clutch shift solenoid valve does not operates.

Battery voltage

1V or less

AT-93

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

TCM Terminals and Reference Value (Cont’d)

Terminal

No.

22 R

24 GY

25 B/Y Ground — — 0V

26 G/B

27 G/W

28 R/Y

Wire color Item Condition

When setting overdrive control

Overdrive control switch

ASCD O/D cut signal

PNP switch 1 position

PNP switch 2 position

Power source (Memory back-up)

switch in OFF position

When setting overdrive control switch in ON position

When ASCD permits O/D. 5 - 8V

When ASCD requires O/D to be OFF.

When setting selector lever to 1 position.

When setting selector lever to other position.

When setting selector lever to 2 position.

When setting selector lever to other position.

When turning ignition switch to ON. Battery voltage

When turning ignition switch to OFF.

1V or less

Battery voltage

1V or less

Battery voltage

1V or less

Battery voltage

1V or less

Battery voltage

Judgement

standard

29 B/R

30*2 Y/R

31*2 GY/L

32 B/W

Revolution sensor (Measure in AC range)

DATA LINK CON-

NECTOR data in

DATA LINK CON-

NECTOR data out

Throttle position sensor (Power source)

1V or more

When vehicle cruises at 30 km/h (19 MPH).

When vehicle parks. 0V

———

— 4.5 - 5.5V

Voltage rises gradually in response to vehicle speed.

AT-94

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

TCM Terminals and Reference Value (Cont’d)

Terminal

No.

34 L

35 Y/R

36 P

39 P/L

40 G/B

Wire color Item Condition

When setting selector lever to D

PNP switch D position

PNP switch R position

PNP switch P or N position

Engine speed signal

Vehicle speed sensor

position. When setting selector lever to

other position. When setting selector lever to R

position. When setting selector lever to

other position. When setting selector lever to P or

N position. When setting selector lever to

other position.

When engine runs at idle speed. 0.5 - 2.5V

When moving vehicle at 2 to 3 km/h (1 to 2 MPH) for 1m (3 ft) or more.

Judgement

standard

Battery voltage

1V or less

Battery voltage

1V or less

Battery voltage

1V or less

Voltage varies between less than 1V and more than 4.5V

When depressing accelerator pedal

41 OR/L

42 BR

47 R/B

48 B/Y Ground — — 0V

*1: These terminals are connected to the ECM. *2: These terminals are connected to the Data link connector.

Throttle position sensor

Throttle position sensor (Ground)

A/T fluid temperature sensor

slowly after warming up engine. (Voltage rises gradually in response to throttle position.)

——

When ATF temperature is 20°C (68°F).

When ATF temperature is 80°C (176°F).

Fully-closed throttle:

Approximately 0.5V Fully-open throttle:

Approximately 4V

Approximately

1.5V

Approximately

0.5V

AT-95

IDX

TROUBLE DIAGNOSIS FOR POWER SUPPLY

Wiring Diagram — AT — MAIN

NGAT0185

AT-96

AAT581A

TROUBLE DIAGNOSIS FOR POWER SUPPLY

Wiring Diagram — AT — MAIN (Cont’d)

TCM TERMINALS AND REFERENCE VALUE

Remarks: Specification data are reference values.

Terminal

No.

10 W/R Power source

19 W/R Power source Same as No. 10 25 B/Y Ground — — 0V

28 R/Y

48 B/Y Ground — — 0V

1 CHECK TCM POWER SOURCE

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

2. Check voltage between TCM terminals (10, 19, 28) and ground.

Wire color Item Condition

When turning ignition switch to ON Battery voltage

When turning ignition switch to OFF 1V or less

Power source (Memory backup)

When turning ignition switch to OFF Battery voltage

When turning ignition switch to ON Battery voltage

NGAT0185S01

Judgement

standard

Voltage: Battery voltage

3. Turn ignition switch to OFF position.

4. Check voltage between TCM terminal 28 and ground.

Voltage: Battery voltage

OK or NG

I Harness for short or open between ignition switch and TCM terminals 10, 19 and 28

(Main harness)

I Ignition switch and fuse

Refer to “POWER SUPPLY ROUTING”,

EL-9

AAT476A

AT-97

IDX

TROUBLE DIAGNOSIS FOR POWER SUPPLY

Wiring Diagram — AT — MAIN (Cont’d)

2 CHECK TCM GROUND CIRCUIT

1. Turn ignition switch to OFF position.

2. Disconnect TCM harness connector.

3. Check continuity between terminals (25, 48) and ground. Refer to wiring diagrams.

Continuity should exist.

If OK, check harness for short to ground and short to power.

OK or NG

AT-98

DTC P0705 PARK/NEUTRAL POSITION (PNP) SWITCH

Description

AAT478A

Remarks: Specification data are reference values.

Terminal

No.

26 G/B

27 G/W

Wire color Item Condition

PNP switch 1 position

PNP switch 2 position

Description

NGAT0028

I The PNP switch assembly includes a transmission range

switch.

I The transmission range switch detects the selector position

and sends a signal to the TCM.

TCM TERMINALS AND REFERENCE VALUE

When setting selector lever to 1 position.

When setting selector lever to other positions.

When setting selector lever to 2 position.

When setting selector lever to other positions.

Battery voltage

1V or less

Battery voltage

1V or less

NGAT0028S02

Judgement

standard

When setting selector lever to D

34 L

35 Y

36 P

PNP switch D position

PNP switch R position

PNP switch P or N position

position. When setting selector lever to other

positions. When setting selector lever to R

position. When setting selector lever to other

positions. When setting selector lever to P or N

position. When setting selector lever to other

positions.

ON BOARD DIAGNOSIS LOGIC

Diagnostic trouble code Malfunction is detected when ... Check item (Possible cause)

: PNP SW/CIRC

: P0705

TCM does not receive the correct voltage signal from the switch based on the gear position.

I Harness or connectors

(The PNP switch circuit is open or shorted.)

I PNP switch

Battery voltage

1V or less

Battery voltage

1V or less

Battery voltage

1V or less

NGAT0028S03

AT-99

IDX

Description (Cont’d)

DTC P0705 PARK/NEUTRAL POSITION (PNP) SWITCH

DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed. NOTE:

If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and wait at least 5 seconds before conducting the next test.

After the repair, perform the following procedure to confirm the

SAT580J

SAT617J

malfunction is eliminated.

With CONSULT-II

1) Turn ignition switch ON.

2) Select “DATA MONITOR” mode for “ENGINE” with CONSULTII.

3) Start engine and maintain the following conditions for at least 5 consecutive seconds.

VHCL SPEED SE: 10 km/h (6 MPH) or more THRTL POS SEN: More than 1.3V Selector lever: D position (O/D ON or OFF)

With GST

Follow the procedure “With CONSULT-II”.

NGAT0028S01

AT-100

Nissan Xterra Automatic Transmission AT 2000 Owner's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

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

Special Service Tools

PREPARATION

A/T Electrical Parts Location

OVERALL SYSTEM

Circuit Diagram

Cross-sectional View

Hydraulic Control Circuit

Shift Mechanism

Control System

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

TCM Terminals and Reference Value

TROUBLE DIAGNOSIS FOR POWER SUPPLY

DTC P0705 PARK/NEUTRAL POSITION (PNP) SWITCH

Description