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AUTOMATIC TRANSAXLE
SECTION AT
CONTENTS
EURO-OBD EXCEPT FOR EURO-OBD
TROUBLE DIAGNOSIS - INDEX ....................................5 ON BOARD DIAGNOSTIC SYSTEM ............................56
Alphabetical & P No. Index for DTC ...........................5 CONSULT-II ...............................................................56
Diagnostic Procedure Without CONSULT-II..............61
PRECAUTIONS ...............................................................7 EURO-OBD
Supplemental Restraint System (SRS) AIR
BAG and SEAT BELT PRE-TENSIONER...............7 TROUBLE DIAGNOSIS - INTRODUCTION..................68
Precautions for On Board Diagnostic (EURO- Introduction ................................................................68
OBD) System of A/T and Engine - EURO-OBD - .......7 Work Flow..................................................................72
Precautions ..................................................................7
Service Notice or Precautions .....................................9 EXCEPT FOR EURO-OBD
Wiring Diagrams and Trouble Diagnosis...................10
TROUBLE DIAGNOSIS -...............................................74
PREPARATION .............................................................11
Introduction ................................................................74
Special Service Tools ................................................11
Work Flow..................................................................77
Commercial Service Tools .........................................13
OVERALL SYSTEM ......................................................15
A/T Electrical Parts Location .....................................15 TROUBLE DIAGNOSIS - BASIC INSPECTION ...........79
Circuit Diagram ..........................................................16 A/T Fluid Check .........................................................79
Cross-sectional View .................................................17 Stall Test ....................................................................79
Hydraulic Control Circuit............................................18 Line Pressure Test.....................................................83
Shift Mechanism ........................................................19 Road Test...................................................................84
Control System ..........................................................28 TROUBLE DIAGNOSIS - GENERAL
Control Mechanism....................................................30 DESCRIPTION .............................................................103
Control Valve .............................................................34 Symptom Chart........................................................103
TCM Terminals and Reference Value......................115
EURO-OBD TROUBLE DIAGNOSIS FOR POWER SUPPLY........120
ON BOARD DIAGNOSTIC SYSTEM Wiring Diagram - AT - MAIN....................................120
DESCRIPTION ...............................................................36 Diagnostic Procedure ..............................................121
Introduction ................................................................36
EURO-OBD Function for A/T System .......................36 EURO-OBD
One or Two Trip Detection Logic of EURO-OBD......36 DTC P0705 PARK/NEUTRAL POSITION SWITCH ...123
EURO-OBD Diagnostic Trouble Code (DTC)............36 Description ...............................................................123
Malfunction Indicator (MI) ..........................................40 On Board Diagnosis Logic.......................................123
CONSULT-II ...............................................................40 Possible Cause........................................................124
Diagnostic Procedure Without CONSULT-II..............49 Diagnostic Trouble Code (DTC) Confirmation
Procedure ................................................................124
CONTENTS (Cont'd)
Wiring Diagram - AT - PNP/SW...............................125 Description ...............................................................163
Diagnostic Procedure ..............................................126 On Board Diagnosis Logic.......................................164
DTC P0710 A/T FLUID TEMPERATURE SENSOR Possible Cause........................................................164
CIRCUIT .......................................................................129 Diagnostic Trouble Code (DTC) Confirmation
Description ...............................................................129 Procedure ................................................................165
On Board Diagnosis Logic.......................................129 Wiring Diagram - AT - 4TH ......................................167
Possible Cause........................................................130 Diagnostic Procedure ..............................................168
Diagnostic Trouble Code (DTC) Confirmation DTC P0740 TORQUE CONVERTER CLUTCH ..........172
Procedure ................................................................130 Description ...............................................................172
Wiring Diagram - AT - FTS ......................................131 On Board Diagnosis Logic.......................................172
Diagnostic Procedure ..............................................132 Possible Cause........................................................172
DTC P0720 VEHICLE SPEED SENSOR.A/T..............135 Diagnostic Trouble Code (DTC) Confirmation
Description ...............................................................135 Procedure ................................................................173
On Board Diagnosis Logic.......................................135 Wiring Diagram - AT - TCV......................................174
Possible Cause........................................................135 Diagnostic Procedure ..............................................175
Diagnostic Trouble Code (DTC) Confirmation DTC P0745 LINE PRESSURE SOLENOID VALVE ...177
Procedure ................................................................136 Description ...............................................................177
Wiring Diagram - AT - VSSA/T ................................137 On Board Diagnosis Logic.......................................177
Diagnostic Procedure ..............................................138 Possible Cause........................................................178
DTC P0725 ENGINE SPEED SIGNAL .......................140 Diagnostic Trouble Code (DTC) Confirmation
Description ...............................................................140 Procedure ................................................................178
On Board Diagnosis Logic.......................................140 Wiring Diagram - AT - LPSV....................................179
Possible Cause........................................................140 Diagnostic Procedure ..............................................180
Diagnostic Trouble Code (DTC) Confirmation DTC P0750 SHIFT SOLENOID VALVE A ..................183
Procedure ................................................................141 Description ...............................................................183
Wiring Diagram - AT - ENGSS ................................142 On Board Diagnosis Logic.......................................183
Diagnostic Procedure ..............................................143 Possible Cause........................................................183
DTC P0731 A/T 1ST GEAR FUNCTION ....................145 Diagnostic Trouble Code (DTC) Confirmation
Description ...............................................................145 Procedure ................................................................184
On Board Diagnosis Logic.......................................145 Wiring Diagram - AT - SSV/A ..................................185
Possible Cause........................................................146 Diagnostic Procedure ..............................................186
Diagnostic Trouble Code (DTC) Confirmation DTC P0755 SHIFT SOLENOID VALVE B ..................188
Procedure ................................................................146 Description ...............................................................188
Wiring Diagram - AT - 1ST ......................................148 On Board Diagnosis Logic.......................................188
Diagnostic Procedure ..............................................149 Possible Cause........................................................188
DTC P0732 A/T 2ND GEAR FUNCTION....................151 Diagnostic Trouble Code (DTC) Confirmation
Description ...............................................................151 Procedure ................................................................189
On Board Diagnosis Logic.......................................151 Wiring Diagram - AT - SSV/B ..................................190
Possible Cause........................................................152 Diagnostic Procedure ..............................................191
Diagnostic Trouble Code (DTC) Confirmation DTC P1705 THROTTLE POSITION SENSOR ...........193
Procedure ................................................................152 Description ...............................................................193
Wiring Diagram - AT - 2ND......................................154 On Board Diagnosis Logic.......................................194
Diagnostic Procedure ..............................................155 Possible Cause........................................................194
DTC P0733 A/T 3RD GEAR FUNCTION....................157 Diagnostic Trouble Code (DTC) Confirmation
Description ...............................................................157 Procedure ................................................................195
On Board Diagnosis Logic.......................................157 Wiring Diagram - AT - TPS......................................196
Possible Cause........................................................158 Diagnostic Procedure ..............................................197
Diagnostic Trouble Code (DTC) Confirmation DTC P1760 OVERRUN CLUTCH SOLENOID
Procedure ................................................................158 VALVE..........................................................................202
Wiring Diagram - AT - 3RD......................................160 Description ...............................................................202
Diagnostic Procedure ..............................................161 On Board Diagnosis Logic.......................................202
DTC P0734 A/T 4TH GEAR FUNCTION ....................163 Possible Cause........................................................202
AT-2
CONTENTS (Cont'd)
Diagnostic Trouble Code (DTC) Confirmation BATT/FLUID TEMP SEN (A/T FLUID TEMP
Procedure ................................................................203 SENSOR CIRCUIT AND TCM POWER SOURCE) ....257
Wiring Diagram - AT - OVRCSV..............................204 Description ...............................................................257
Diagnostic Procedure ..............................................205 Wiring Diagram - AT - BA/FTS ................................259
DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP Diagnostic Procedure ..............................................260
SENSOR CIRCUIT AND TCM POWER SOURCE) ....207 ENGINE SPEED SIGNAL............................................264
Description ...............................................................207 Description ...............................................................264
On Board Diagnosis Logic.......................................208 Wiring Diagram - AT - ENGSS ................................265
Possible Cause........................................................208 Diagnostic Procedure ..............................................266
Diagnostic Trouble Code (DTC) Confirmation LINE PRESSURE SOLENOID VALVE .......................268
Procedure ................................................................208 Description ...............................................................268
Wiring Diagram - AT - BA/FTS ................................209 Wiring Diagram - AT - LPSV....................................270
Diagnostic Procedure ..............................................210 Diagnostic Procedure ..............................................271
DTC VEHICLE SPEED SENSOR.MTR .......................214
Description ...............................................................214
On Board Diagnosis Logic.......................................214 CONTROL UNIT (RAM), CONTROL UNIT (ROM).....274
Possible Cause........................................................214 Description ...............................................................274
Diagnostic Trouble Code (DTC) Confirmation Diagnostic Procedure ..............................................275
Procedure ................................................................215 CONTROL UNIT (EEP ROM)......................................276
Wiring Diagram - AT - VSSMTR..............................216 Description ...............................................................276
Diagnostic Procedure ..............................................217 Diagnostic Procedure ..............................................277
TROUBLE DIAGNOSES FOR SYMPTOMS ...............278
EXCEPT FOR EURO-OBD Wiring Diagram - AT - NONDTC .............................278
1. S (SPORT) Indicator Lamp Does Not Come
VEHICLE SPEED SENSOR.A/T..................................219 On ............................................................................282
Description ...............................................................219 2. S (SPORT) or (SNOW) Indicator Lamp
Wiring Diagram - AT - VSSA/T ................................221 Does Not Come On .................................................284
Diagnostic Procedure ..............................................222 3. O/D OFF Indicator Lamp Does Not Come On....285
VEHICLE SPEED SENSOR.MTR................................224 4. S (SPORT) Indicator Lamp Does Not Come
Description ...............................................................224 On ............................................................................285
Wiring Diagram - AT - VSSMTR..............................226 5. Engine Cannot Be Started In P and N Position..287
Diagnostic Procedure ..............................................227 6. In P Position, Vehicle Moves Forward or
THROTTLE POSITION SENSOR................................229 Backward When Pushed .........................................288
Description ...............................................................229 7. In N Position, Vehicle Moves ..............................289
Wiring Diagram - AT - TPS......................................231 8. Large Shock. N -> R Position .............................292
Diagnostic Procedure ..............................................232 9. Vehicle Does Not Creep Backward In R
SHIFT SOLENOID VALVE A ......................................237 Position ....................................................................294
Description ...............................................................237 10. Vehicle Does Not Creep Forward in D, 2 or 1
Wiring Diagram - AT - SSV/A ..................................239 Position ....................................................................298
Diagnostic Procedure ..............................................240 11. Vehicle Cannot Be Started From D1 .................301
SHIFT SOLENOID VALVE B ......................................242 12. A/T Does Not Shift: D1 -> D2 or Does Not
Description ...............................................................242 Kickdown: D4 -> D2..................................................304
Wiring Diagram - AT - SSV/B ..................................244 13. A/T Does Not Shift: D2 -> D3.............................307
Diagnostic Procedure ..............................................245 14. A/T Does Not Shift: D3 -> D4.............................310
OVERRUN CLUTCH SOLENOID VALVE...................247 15. A/T Does Not Perform Lock-up .........................313
Description ...............................................................247 16. A/T Does Not Hold Lock-up Condition ..............315
Wiring Diagram - AT - OVRCSV..............................249 17. Lock-up Is Not Released...................................317
Diagnostic Procedure ..............................................250 18. Engine Speed Does Not Return To Idle (Light
TORQUE CONVERTER CLUTCH SOLENOID Braking D4 -> D3).....................................................318
VALVE..........................................................................252 19. Vehicle Does Not Start From D1 .......................320
Description ...............................................................252 20. A/T Does Not Shift: D4 -> D3, When
Wiring Diagram - AT - TCV......................................254 Overdrive Control Switch ON -> OFF .....................321
Diagnostic Procedure ..............................................255
AT-3
CONTENTS (Cont'd)
21. A/T Does Not Shift: D3 -> 22, When Selector High Clutch ..............................................................397
Lever D -> 2 Position ..............................................322 Forward and Overrun Clutches ...............................402
22. A/T Does Not Shift: 22 -> 11, When Selector Low & Reverse Brake..............................................407
Lever 2 -> 1 Position ...............................................323 Rear Internal Gear, Forward Clutch Hub and
23. Vehicle Does Not Decelerate By Engine Overrun Clutch Hub.................................................410
Brake........................................................................324 Output Shaft, Idler Gear, Reduction Pinion Gear
24. TCM Self-diagnosis Does Not Activate (PNP, and Bearing Retainer...............................................414
Overdrive Control, A/T Mode and Throttle Band Servo Piston Assembly ..................................419
Position Switches Circuit Checks)...........................324 Final Drive................................................................424
A/T SHIFT LOCK SYSTEM.........................................337 ASSEMBLY..................................................................430
Description ...............................................................337 Assembly (1)............................................................430
Wiring Diagram - SHIFT -........................................338 Adjustment (1) .........................................................430
Shift Lock System Electrical Parts Location............339 Assembly (2)............................................................435
Diagnostic Procedure ..............................................339 Adjustment (2) .........................................................441
Key Interlock Cable .................................................343 Assembly (3)............................................................445
SHIFT CONTROL SYSTEM ........................................345 SERVICE DATA AND SPECIFICATIONS (SDS) .......451
Control Device .........................................................345 General Specifications.............................................451
Control Cable...........................................................346 Shift Schedule..........................................................451
ON-VEHICLE SERVICE ..............................................347 Stall Revolution........................................................452
Control Valve Assembly and Accumulators.............347 Line Pressure...........................................................452
Revolution Sensor Replacement .............................348 Control Valves..........................................................453
Park/Neutral Position (PNP) Switch Adjustment .....348 Accumulator .............................................................453
Control Cable Adjustment........................................349 Clutch and Brakes ...................................................454
Differential Side Oil Seal Replacement ...................349 Final Drive................................................................456
REMOVAL AND INSTALLATION ...............................350 Planetary Carrier and Oil Pump ..............................458
Removal...................................................................350 Input Shaft ...............................................................458
Installation................................................................351 Reduction Pinion Gear ............................................458
OVERHAUL .................................................................353 Band Servo ..............................................................459
Components.............................................................353 Output Shaft.............................................................459
Oil Channel ..............................................................356 Bearing Retainer......................................................460
Locations of Adjusting Shims, Needle Bearings, Total End Play..........................................................460
Thrust Washers and Snap Rings ............................357 Reverse Clutch End Play ........................................460
DISASSEMBLY............................................................358 Removal and Installation .........................................461
REPAIR FOR COMPONENT PARTS .........................372 Shift Solenoid Valves...............................................461
Manual Shaft............................................................372 Solenoid Valves .......................................................461
Oil Pump ..................................................................375 A/T Fluid Temperature Sensor.................................461
Control Valve Assembly...........................................379 Revolution Sensor ...................................................461
Control Valve Upper Body .......................................388 Dropping Resistor ....................................................461
Control Valve Lower Body .......................................392
Reverse Clutch ........................................................394
AT-4
TROUBLE DIAGNOSIS -- INDEX EURO-OBD
Alphabetical & P No. Index for DTC
Alphabetical & P No. Index for DTC NFAT0001
ALPHABETICAL INDEX FOR DTC NFAT0001S01
Check if the vehicle is a model with EURO-OBD system or not by the "Type approval number" on the identi-
fication plate. Refer to GI-40, "IDENTIFICATION PLATE".
Type approval number Model
Available With EURO-OBD system
Not available (blank) Without EURO-OBD system
DTC
Items
CONSULT-II Reference page
(CONSULT-II screen terms)
GST*1
A/T 1ST GR FNCTN P0731 AT-145
A/T 2ND GR FNCTN P0732 AT-151
A/T 3RD GR FNCTN P0733 AT-157
A/T 4TH GR FNCTN P0734 AT-163
ATF TEMP SEN/CIRC P0710 AT-129
ENGINE SPEED SIG P0725 AT-140
L/PRESS SOL/CIRC P0745 AT-177
O/R CLTCH SOL/CIRC P1760 AT-202
PNP SW/CIRC P0705 AT-123
SFT SOL A/CIRC*2 P0750 AT-183
SFT SOL B/CIRC*2 P0755 AT-188
TCC SOLENOID/CIRC P0740 AT-172
TP SEN/CIRC A/T*2 P1705 AT-193
VEH SPD SEN/CIR AT*3 P0720 AT-135
*1: These numbers are prescribed by SAE J2012.
*2: When the fail-safe operation occurs, the MI illuminates.
*3: The MI illuminates when both the "Revolution sensor signal" and the "Vehicle speed sensor signal" meet the fail-safe condition at
the same time.
AT-5
TROUBLE DIAGNOSIS -- INDEX EURO-OBD
Alphabetical & P No. Index for DTC (Cont'd)
P NO. INDEX FOR DTC =NFAT0001S02
Check if the vehicle is a model with EURO-OBD system or not by the "Type approval number" on the identi-
fication plate. Refer to GI-40, "IDENTIFICATION PLATE".
Type approval number Model
Available With EURO-OBD system
Not available (blank) Without EURO-OBD system
DTC
Items
CONSULT-II Reference page
(CONSULT-II screen terms)
GST*1
P0705 PNP SW/CIRC AT-123
P0710 ATF TEMP SEN/CIRC AT-129
P0720 VEH SPD SEN/CIR AT*3 AT-135
P0725 ENGINE SPEED SIG AT-140
P0731 A/T 1ST GR FNCTN AT-145
P0732 A/T 2ND GR FNCTN AT-151
P0733 A/T 3RD GR FNCTN AT-157
P0734 A/T 4TH GR FNCTN AT-163
P0740 TCC SOLENOID/CIRC AT-172
P0745 L/PRESS SOL/CIRC AT-177
P0750 SFT SOL A/CIRC*2 AT-183
P0755 SFT SOL B/CIRC*2 AT-188
P1705 TP SEN/CIRC A/T*2 AT-193
P1760 O/R CLTCH SOL/CIRC AT-202
*1: These numbers are prescribed by SAE J2012.
*2: When the fail-safe operation occurs, the MI illuminates.
*3: The MI illuminates when both the "Revolution sensor signal" and the "Vehicle speed sensor signal" meet the fail-safe condition at
the same time.
AT-6
PRECAUTIONS
Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
Supplemental Restraint System (SRS) "AIR
BAG" and "SEAT BELT PRE-TENSIONER" NFAT0271
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER" used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to NISSAN MODEL A33 is as follows (The compo-
sition varies according to the destination and optional equipment.):
+ For a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
+ For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring
harness, warning lamp (one of components of air bags for a frontal collision).
Information necessary to service the system safely is included in the RS section of this Service Manual.
WARNING:
+ To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance should be per-
formed by an authorized NISSAN dealer.
+ Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the RS section.
+ Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
Precautions for On Board Diagnostic (EURO-
OBD) System of A/T and Engine -- EURO-OBD
-- NFAT0003
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
+ Be sure to turn the ignition switch OFF and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc.
will cause the MI to light up.
+ Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MI to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
+ Be sure to route and secure the harnesses properly after work. Interference of the harness with a
bracket, etc. may cause the MI to light up due to a short circuit.
+ Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MI to light up due to a malfunction of the EGR system or fuel injection system, etc.
+ Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM or
ECM before returning the vehicle to the customer.
Precautions NFAT0004
+ Before connecting or disconnecting the TCM harness
connector, turn ignition switch OFF and disconnect nega-
tive battery terminal. Failure to do so may damage the
TCM. Because battery voltage is applied to TCM even if
ignition switch is turned OFF.
SEF289H
AT-7
PRECAUTIONS
Precautions (Cont'd)
+ When connecting or disconnecting pin connectors into or
from TCM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on TCM
pin terminal, when connecting pin connectors.
AAT470A
+ Before replacing TCM, perform TCM input/output signal
inspection and make sure whether TCM functions prop-
erly or not. Refer to AT-116.
MEF040DA
+ After performing each TROUBLE DIAGNOSIS, perform
"DTC (Diagnostic Trouble Code) CONFIRMATION PROCE-
DURE".
The DTC should not be displayed in the "DTC CONFIRMA-
TION PROCEDURE" if the repair is completed.
SAT652J
+ Before proceeding with disassembly, thoroughly clean the out-
side of the transaxle. It is important to prevent the internal parts
from becoming contaminated by dirt or other foreign matter.
+ Disassembly should be done in a clean work area.
+ Use lint-free cloth or towels for wiping parts clean. Common
shop rags can leave fibers that could interfere with the opera-
tion of the transaxle.
+ Place disassembled parts in order for easier and proper
assembly.
+ All parts should be carefully cleaned with a general purpose,
non-flammable solvent before inspection or reassembly.
+ Gaskets, seals and O-rings should be replaced any time the
transaxle is disassembled.
+ It is very important to perform functional tests whenever they
are indicated.
+ The valve body contains precision parts and requires extreme
care when parts are removed and serviced. Place disas-
sembled valve body parts in order for easier and proper
assembly. Care will also prevent springs and small parts from
becoming scattered or lost.
+ Properly installed valves, sleeves, plugs, etc. will slide along
bores in valve body under their own weight.
+ Before assembly, apply a coat of recommended ATF to all
AT-8
PRECAUTIONS
Precautions (Cont'd)
parts. Apply petroleum jelly to protect O-rings and seals, or
hold bearings and washers in place during assembly. Do not
use grease.
+ Extreme care should be taken to avoid damage to O-rings,
seals and gaskets when assembling.
+ After overhaul, refill the transaxle with new ATF.
+ When the A/T drain plug is removed, only some of the fluid is
drained. Old A/T fluid will remain in torque converter and ATF
cooling system.
Always follow the procedures under MA-27, "Changing A/T
Fluid" when changing A/T fluid.
Service Notice or Precautions NFAT0005
FAIL-SAFE NFAT0005S01
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 cus-
tomer may complain of sluggish or poor acceleration.
When the ignition key is turned ON following Fail-Safe operation, S (SPORT) indicator lamp blinks for about
8 seconds. Refer to "TCM Self-diagnostic Procedure (NO TOOLS)", AT-49 (EURO-OBD) or "SELF-DIAGNOS-
TIC PROCEDURE (WITHOUT CONSULT-II)", AT-61 (EXCEPT FOR EURO-OBD).
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 S (SPORT) 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-72 (EURO-OBD) or AT-77 (EXCEPT FOR EURO-OBD).
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 NFAT0005S02
The torque converter should be replaced under any of the following conditions:
+ External leaks in the hub weld area.
+ Converter hub is scored or damaged.
+ Converter pilot is broken, damaged or fits poorly into crankshaft.
+ Steel particles are found after flushing the cooler and cooler lines.
+ Pump is damaged or steel particles are found in the converter.
+ 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.)
+ Converter is contaminated with engine coolant containing antifreeze.
+ Internal failure of stator roller clutch.
+ Heavy clutch debris due to overheating (blue converter).
+ 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:
+ The fluid has an odor, is discolored, and there is no evidence of metal or clutch facing particles.
+ The threads in one or more of the converter bolt holes are damaged.
+ Transaxle 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.
+ Vehicle has 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.
EURO-OBD-II SELF-DIAGNOSIS -- EURO-OBD -- NFAT0005S04
+ 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 S (SPORT) indicator or the malfunction indicator (MI). Refer to the table on AT-41
for the indicator used to display each self-diagnostic result.
AT-9
PRECAUTIONS
Service Notice or Precautions (Cont'd)
+ The self-diagnostic results indicated by the MI are automatically stored in both the ECM and TCM memo-
ries.
Always perform the procedure "HOW TO ERASE DTC" on AT-38 to complete the repair and avoid
unnecessary blinking of the MI.
+ The following self-diagnostic items can be detected using ECM self-diagnostic results mode* only when
the S (SPORT) indicator lamp does not indicate any malfunctions.
- park/neutral position (PNP) switch
- A/T 1st, 2nd, 3rd, or 4th gear function
*: For details of EURO-OBD, refer to EC-44, "Introduction".
+ Certain systems and components, especially those related to EURO-OBD, may use a new style
slide-locking type harness connector.
For description and how to disconnect, refer to EL-5, "Description".
Wiring Diagrams and Trouble Diagnosis NFAT0006
When you read wiring diagrams, refer to the following:
+ GI-11, "HOW TO READ WIRING DIAGRAMS"
+ EL-9, "POWER SUPPLY ROUTING" for power distribution circuit
When you perform trouble diagnosis, refer to the following:
+ GI-33, "HOW TO FOLLOW TEST GROUP IN TROUBLE DIAGNOSIS"
+ GI-22, "HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT"
AT-10
PREPARATION
Special Service Tools
Special Service Tools NFAT0272
Tool number
Description
Tool name
KV381054S0 + Removing differential side oil seals
Puller + Removing differential side bearing outer race
+ Removing idler gear bearing outer race
a: 250 mm (9.84 in)
b: 160 mm (6.30 in)
NT414
ST33400001 + Installing differential side oil seal
Drift F04B and F04W (RH side)
+ Installing oil seal on oil pump housing
a: 60 mm (2.36 in) dia.
b: 47 mm (1.85 in) dia.
NT086
ST2505S001 + Measuring line pressure
Oil pressure gauge set
1 ST25051001
Oil pressure gauge
2 ST25052000
Hose
3 ST25053000
Joint pipe
4 ST25054000
Adapter
5 ST25055000
Adapter NT097
ST27180001 + Removing idler gear
Puller a: 100 mm (3.94 in)
b: 110 mm (4.33 in)
c: M8 x 1.25P
NT424
ST23540000 + Removing and installing parking rod plate and
Pin punch manual plate pins
a: 2.3 mm (0.091 in) dia.
b: 4 mm (0.16 in) dia.
NT442
ST25710000 + Aligning groove of manual shaft and hole of
Pin punch transmission case
a: 2 mm (0.08 in) dia.
NT410
KV32101000 + Removing and installing manual shaft retaining
Pin punch pin
+ Removing and installing pinion mate shaft lock
pin
a: 4 mm (0.16 in) dia.
NT410
AT-11
PREPARATION
Special Service Tools (Cont'd)
Tool number
Description
Tool name
KV31102400 + Removing and installing clutch return springs
Clutch spring compres- + Installing low and reverse brake piston
sor a: 320 mm (12.60 in)
b: 174 mm (6.85 in)
NT423
KV40100630 + Installing reduction gear bearing inner race
Drift + Installing idler gear bearing inner race
a: 67.5 mm (2.657 in) dia.
b: 44 mm (1.73 in) dia.
c: 38.5 mm (1.516 in) dia.
NT107
ST30720000 + Installing idler gear bearing outer race
Bearing installer a: 77 mm (3.03 in) dia.
b: 55.5 mm (2.185 in) dia.
NT115
ST35321000 + Installing output shaft bearing
Drift a: 49 mm (1.93 in) dia.
b: 41 mm (1.61 in) dia.
NT073
ST33230000 + Installing differential side bearing inner race
Drift F04B and F04W (RH side)
a: 51 mm (2.01 in) dia.
b: 28.5 mm (1.122 in) dia.
NT084
ST33220000 + Selecting differential side bearing adjusting shim
Drift (F04W)
a: 37 mm (1.46 in) dia.
b: 31 mm (1.22 in) dia.
c: 22 mm (0.87 in) dia.
NT085
ST3306S001 + Removing differential side bearing inner race
Differential side bearing a: 38 mm (1.50 in) dia.
puller set b: 28.5 mm (1.122 in) dia.
1 ST33051001 c: 130 mm (5.12 in)
Puller d: 135 mm (5.31 in)
2 ST33061000 e: 100 mm (3.94 in)
Adapter
AMT153
AT-12
PREPARATION
Special Service Tools (Cont'd)
Tool number
Description
Tool name
ST3127S000 + Checking differential side bearing preload
Preload gauge
1 GG91030000
Torque wrench
2 HT62940000
Socket adapter
3 HT62900000
Socket adapter NT124
ST35271000 + Installing idler gear
Drift + Installing differential side bearing inner race
F04W (LH side)
a: 72 mm (2.83 in) dia.
b: 63 mm (2.48 in) dia.
NT115
KV38107700 + Selecting differential side bearing adjusting shim
Preload adapter (F04B)
+ Checking differential side bearing preload
(F04B)
NT087
ST30613000 + Installing differential side bearing inner race
Drift F04W (LH side)
a: 72 mm (2.83 in) dia.
b: 48 mm (1.89 in) dia.
NT073
KV38105210 + Selecting differential side bearing adjusting shim
Preload adapter (F04W)
+ Checking differential side bearing preload
(F04W)
NT075
Commercial Service Tools NFAT0273
Tool name Description
Puller + Removing idler gear bearing inner race
+ Removing and installing band servo piston snap
ring
NT077
Puller + Removing reduction gear bearing inner race
a: 60 mm (2.36 in) dia.
b: 35 mm (1.38 in) dia.
NT411
Drift + Installing differential side oil seal
F04W (LH side)
a: 90 mm (3.54 in) dia.
NT083
AT-13
PREPARATION
Commercial Service Tools (Cont'd)
Tool name Description
Drift + Installing needle bearing on bearing retainer
a: 36 mm (1.42 in) dia.
NT083
Drift + Removing needle bearing from bearing retainer
a: 33.5 mm (1.319 in) dia.
NT083
Drift + Installing differential side bearing outer race
F04B and F04W (RH side)
a: 75 mm (2.95 in) dia.
NT083
Drift + Installing differential side bearing outer race
F04W (LH side)
a: 100 mm (3.94 in) dia.
NT083
AT-14
OVERALL SYSTEM
A/T Electrical Parts Location
A/T Electrical Parts Location NFAT0274
SAT114K
AT-15
OVERALL SYSTEM
Circuit Diagram
Circuit Diagram NFAT0275
MAT902A
AT-16
OVERALL SYSTEM
Cross-sectional View
Cross-sectional View NFAT0276
SAT577J
1. Band servo piston 8. Front planetary gear 15. Idler gear
2. Reverse clutch drum 9. Low one-way clutch 16. Forward one-way clutch
3. Converter housing 10. Rear planetary gear 17. Pinion reduction gear
4. Oil pump 11. Forward clutch 18. Final gear
5. Brake band 12. Overrun clutch 19. Differential case
6. Reverse clutch 13. Low & reverse brake 20. Input shaft
7. High clutch 14. Output gear 21. Torque converter
AT-17
OVERALL SYSTEM
Hydraulic Control Circuit
Hydraulic Control Circuit NFAT0277
SAT578J
AT-18
OVERALL SYSTEM
Shift Mechanism
Shift Mechanism NFAT0278
CONSTRUCTION NFAT0278S01
SAT998I
1. Torque converter 9. Front internal gear 17. Overrun clutch
2. Oil pump 10. Front planetary carrier 18. Low one-way clutch
3. Input shaft 11. Rear sun gear 19. Low & reverse brake
4. Brake band 12. Rear pinion gear 20. Parking pawl
5. Reverse clutch 13. Rear internal gear 21. Parking gear
6. High clutch 14. Rear planetary carrier 22. Output shaft
7. Front sun gear 15. Forward clutch 23. Idle gear
8. Front pinion gear 16. Forward one-way clutch 24. Output gear
FUNCTION OF CLUTCH AND BRAKE NFAT0278S02
Clutch and brake components Abbr. Function
Reverse clutch 5 R/C To transmit input power to front sun gear 7.
High clutch 6 H/C To transmit input power to front planetary carrier 10.
Forward clutch 15 F/C To connect front planetary carrier 10 with forward one-way
clutch 16.
Overrun clutch 17 O/C To connect front planetary carrier 10 with rear internal gear 13.
Brake band 4 B/B To lock front sun gear 7.
Forward one-way clutch 16 F/O.C When forward clutch 15 is engaged, to stop rear internal gear
13 from rotating in opposite direction against engine revolution.
Low one-way clutch 18 L/O.C To stop front planetary carrier 10 from rotating in opposite direc-
tion against engine revolution.
Low & reverse brake 19 L & R/B To lock front planetary carrier 10.
AT-19
OVERALL SYSTEM
Shift Mechanism (Cont'd)
CLUTCH AND BAND CHART NFAT0278S03
For-
Band servo Low
For- Over- ward Low &
Reverse High one-
Shift posi- ward run one- reverse
clutch clutch way Lock-up Remarks
tion clutch clutch way brake
5 6 2nd 3rd 4th clutch
15 17 clutch 19
apply release apply 18
16
PARK POSI-
P
TION
REVERSE
R j j
POSITION
NEUTRAL
N
POSITION
1st j *1D B B
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