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AUTOMATIC TRANSAXLE
C TRANSMISSION/TRANSAXLE
A
AUTOMATIC TRANSAXLE
SECTION AT B
AT
D
E
CONTENTS
PRECAUTIONS ......................................................... 5. TROUBLE DIAGNOSIS -- INTRODUCTION .......... 56 . F
Precautions for Supplemental Restraint System Introduction ............................................................ 56
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Work Flow .............................................................. 60
.
SIONER" ................................................................. 5
. TROUBLE DIAGNOSIS -- BASIC INSPECTION ... 63 G
Precautions for On Board Diagnostic (EURO-OBD) A/T Fluid Check ..................................................... 63 .
System of A/T and Engine -- Euro-OBD -- ............ 5 . Stall Test ................................................................ 64
.
Precautions for Trouble Diagnosis .......................... 5 . Line Pressure Test ................................................. 67 .
H
Precautions for Harness Repair .............................. 5 . Road Test .............................................................. 68
.
Precautions ............................................................. 6
. TROUBLE DIAGNOSIS -- GENERAL DESCRIP-
Service Notice or Precautions ................................. 7 . TION ......................................................................... 86
.
Wiring Diagrams and Trouble Diagnosis ................. 8 . Symptom Chart ...................................................... 86 . I
PREPARATION .......................................................... 9
. TCM Terminals and Reference Value .................. 107 .
Special Service Tools .............................................. 9. CAN COMMUNICATION ........................................ 110 .
Commercial Service Tools ..................................... 12 . System Description .............................................. 110 . J
A/T FLUID ................................................................ 13
. CAN Communication Unit .................................... 110 .
Checking A/T Fluid ................................................ 13. DTC P0705 PARK/NEUTRAL POSITION (PNP)
Changing A/T Fluid ............................................... 13 . SWITCH ................................................................. 113
.
K
OVERALL SYSTEM ................................................ 14 . Description ........................................................... 113
.
A/T Electrical Parts Location ................................. 14 . Wiring Diagram -- AT -- PNP/SW ...................... 115 .
Circuit Diagram ..................................................... 15
. Diagnostic Procedure .......................................... 116 .
Cross-Sectional View ............................................ 16 . Component Inspection ......................................... 118 . L
Hydraulic Control Circuit ....................................... 17 . DTC P0710 A/T FLUID TEMPERATURE SENSOR
Shift Mechanism .................................................... 18
. CIRCUIT ................................................................. 119
.
Control System ...................................................... 27
. Description ........................................................... 119
. M
Control Mechanism ............................................... 28 . Wiring Diagram -- AT -- FTS ............................. 121 .
Control Valve ......................................................... 34
. Diagnostic Procedure .......................................... 122 .
Component Inspection ......................................... 124 .
EURO-OBD DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR) .............................................. 125 .
TROUBLE DIAGNOSIS -- INDEX .......................... 35 . Description ........................................................... 125
.
Alphabetical & P No. Index for DTC ...................... 35 . Wiring Diagram -- AT -- VSSA/T ....................... 128 .
ON BOARD DIAGNOSTIC SYSTEM DESCRIP- Diagnostic Procedure .......................................... 129 .
TION ......................................................................... 37
. DTC P0725 ENGINE SPEED SIGNAL .................. 131 .
Introduction ........................................................... 37
. Description ........................................................... 131
.
EURO-OBD Function for A/T System ................... 37 . Wiring Diagram -- AT -- ENGSS ........................ 132 .
One or Two Trip Detection Logic of EURO-OBD ... 37 Diagnostic Procedure .......................................... 133 .
EURO-OBD Diagnostic Trouble Code (DTC) ........ 37 . DTC P0731 A/T 1ST GEAR FUNCTION ............... 135 .
Malfunction Indicator (MI) .................................... .. 41 . Description ........................................................... 135
.
CONSULT-II .......................................................... 41 . Wiring Diagram -- AT -- 1ST .............................. 138 .
Diagnostic Procedure Without CONSULT-II .......... 50 .
AT-1
Diagnostic Procedure .......................................... 139 . Diagnostic Procedure ........................................... 200 .
Component Inspection ......................................... 140 . Component Inspection .........................................202 .
DTC P0732 A/T 2ND GEAR FUNCTION ............... 141 . DTC VEHICLE SPEED SENSOR MTR .................. 203 .
Description ........................................................... 141
. Description ........................................................... 203
.
Wiring Diagram -- AT -- 2ND ............................. 144 . Wiring Diagram -- AT -- VSSMTR ...................... 205 .
Diagnostic Procedure .......................................... 145 . Diagnostic Procedure ........................................... 206 .
Component Inspection ......................................... 146 . DTC CONTROL UNIT (RAM), CONTROL UNIT
DTC P0733 A/T 3RD GEAR FUNCTION ............... 147 . (ROM) ..................................................................... 207
.
Description ........................................................... 147
. Description ........................................................... 207
.
Wiring Diagram -- AT -- 3RD ............................. 150 . Diagnostic Procedure ........................................... 208 .
Diagnostic Procedure .......................................... 151 . DTC CONTROL UNIT (EEP ROM) ........................ 209 .
Component Inspection ......................................... 152 . Description ........................................................... 209
.
DTC P0734 A/T 4TH GEAR FUNCTION ............... 153 . Diagnostic Procedure ........................................... 210 .
Description ........................................................... 153
. TROUBLE DIAGNOSES FOR SYMPTOMS .......... 211 .
Wiring Diagram -- AT -- 4TH .............................. 156 . Wiring Diagram -- AT -- NONDTC ..................... 211 .
Diagnostic Procedure .......................................... 157 . 1. O/D OFF Indicator Lamp Does Not Come On . 213
Component Inspection ......................................... 160 . 2. Engine Cannot Be Started In "P" and "N" Position.214
DTC P0740 TORQUE CONVERTER CLUTCH 3. In "P" Position, Vehicle Moves Forward Or Back-
SOLENOID VALVE ................................................ 161 . ward When Pushed .............................................. 214 .
Description ........................................................... 161
. 4. In "N" Position, Vehicle Moves ......................... 216 .
Wiring Diagram -- AT -- TCV ............................. 163 . 5. Large Shock. "N" "R" Position ..................... 217 .
Diagnostic Procedure .......................................... 164 . 6. Vehicle Does Not Creep Backward In "R" Position .218
Component Inspection ......................................... 164 . 7. Vehicle Does Not Creep Forward In "D", "2" Or
DTC P0745 LINE PRESSURE SOLENOID VALVE. 166 "1" Position ........................................................... 221
.
Description ........................................................... 166
. 8. Vehicle Cannot Be Started From D1 ................ 223 .
Wiring Diagram -- AT -- LPSV ........................... 168 . 9. A/T Does Not Shift: D1 D2 Or Does Not Kick-
Diagnostic Procedure .......................................... 169 . down: D4 D2 .................................................... 225 .
Component Inspection ......................................... 171 . 10. A/T Does Not Shift: D2 D3 ......................... 227 .
DTC P0750 SHIFT SOLENOID VALVE A .............. 173 . 11. A/T Does Not Shift: D3 D4 .......................... 229 .
Description ........................................................... 173
. 12. A/T Does Not Perform Lock-up ...................... 232 .
Wiring Diagram -- AT -- SSV/A .......................... 175 . 13. A/T Does Not Hold Lock-up Condition ........... 233 .
Diagnostic Procedure .......................................... 176 . 14. Lock-up Is Not Released ................................ 234 .
Component Inspection ......................................... 177 . 15. Engine Speed Does Not Return To Idle (Light
DTC P0755 SHIFT SOLENOID VALVE B .............. 178 . Braking D4 D3 ) ................................................ 235 .
Description ........................................................... 178
. 16. Vehicle Does Not Start From D1 .................... 236 .
Wiring Diagram -- AT -- SSV/B .......................... 180 . 17. A/T Does Not Shift: D4 D3 , When Overdrive
Diagnostic Procedure .......................................... 181 . Control Switch "ON" "OFF" .............................. 237 .
Component Inspection ......................................... 182 . 18. A/T Does Not Shift: D3 22 , When Selector
DTC P1705 ACCELERATOR PEDAL POSITION Lever "D" "2" Position ...................................... 237 .
(APP) SENSOR ...................................................... 183 . 19. A/T Does Not Shift: 22 11 , When Selector
Description ........................................................... 183
. Lever "2" "1" Position ....................................... 238 .
Wiring Diagram -- AT -- TPS ............................. 186 . 20. Vehicle Does Not Decelerate By Engine Brake.239
Diagnostic Procedure .......................................... 187 . 21. TCM Self-diagnosis Does Not Activate (PNP &
DTC P1760 OVERRUN CLUTCH SOLENOID Overdrive Control Switches, and Throttle Position
VALVE .................................................................... 189
. Sensor Circuit Checks) ........................................ 239 .
Description ........................................................... 189
.
Wiring Diagram -- AT -- OVRCSV ..................... 191 . EXC.F/EURO-OBD
Diagnostic Procedure .......................................... 192 .
Component Inspection ......................................... 193 . ON BOARD DIAGNOSTIC SYSTEM DESCRIP-
DTC U1000 CAN COMMUNICATION LINE ........... 194 . TION ....................................................................... 246
.
Description ........................................................... 194
. CONSULT-II ......................................................... 246 .
On Board Diagnosis Logic ................................... 194 . Diagnostic Procedure Without CONSULT-II ........ 252 .
DTC Confirmation Procedure .............................. 194 . TROUBLE DIAGNOSIS -- INTRODUCTION ........ 257 .
Wiring Diagram -- AT .......................................... 195 . Introduction .......................................................... 257
.
Diagnostic Procedure .......................................... 196 . Work Flow ............................................................ 261
.
DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP TROUBLE DIAGNOSIS -- BASIC INSPECTION .. 263 .
SENSOR CIRCUIT AND TCM POWER SOURCE). 197 A/T Fluid Check ................................................... 263 .
Description ........................................................... 197
. Stall Test ............................................................... 264
.
Wiring Diagram -- AT -- BA/FTS ........................ 199 .
AT-2
Line Pressure Test .............................................. 267 . Wiring Diagram -- AT -- TPS ............................. 358 .
Road Test ............................................................ 268
. Diagnostic Procedure .......................................... 359 . A
TROUBLE DIAGNOSIS -- GENERAL DESCRIP- SHIFT SOLENOID VALVE A ................................. 361 .
TION ....................................................................... 285
. Description ........................................................... 361
.
Symptom Chart ................................................... 285 . Wiring Diagram -- AT -- SSV/A .......................... 363 . B
TCM Terminals and Reference Value .................. 304 . Diagnostic Procedure .......................................... 364 .
CAN COMMUNICATION ....................................... 307 . Component Inspection ......................................... 365 .
System Description ............................................. 307 . SHIFT SOLENOID VALVE B ................................. 366 .
CAN Communication Unit ................................... 307 . Description ........................................................... 366
. AT
TROUBLE DIAGNOSES FOR SYMPTOMS ......... 310 . Wiring Diagram -- AT -- SSV/B .......................... 368 .
Wiring Diagram -- AT -- NONDTC ..................... 310 . Diagnostic Procedure .......................................... 369 .
1. O/D OFF Indicator Lamp Does Not Come On . 312 Component Inspection ......................................... 370 . D
2. Engine Cannot Be Started In "P" and "N" Position 313 . OVERRUN CLUTCH SOLENOID VALVE .............. 371 .
3. In "P" Position, Vehicle Moves Forward Or Back- Description ........................................................... 371
.
ward When Pushed ............................................. 313 . Wiring Diagram -- AT -- OVRCSV ..................... 373 . E
4. In "N" Position, Vehicle Moves ........................ 315 . Diagnostic Procedure .......................................... 374 .
5. Large Shock. "N" "R" Position ..................... 316 . Component Inspection ......................................... 375 .
6. Vehicle Does Not Creep Backward In "R" Position 317 . TORQUE CONVERTER CLUTCH SOLENOID
7. Vehicle Does Not Creep Forward In "D", "2" Or VALVE .................................................................... 376
. F
"1" Position .......................................................... 320
. Description ........................................................... 376
.
8. Vehicle Cannot Be Started From D1 ................ 321 . Wiring Diagram -- AT -- TCV ............................. 378 .
9. A/T Does Not Shift: D1 D2 Or Does Not Kick Diagnostic Procedure .......................................... 379 . G
down: D4 D2 .................................................... 324 . Component Inspection ......................................... 380 .
10. A/T Does Not Shift: D2 D3 ........................ 326 . BATT/FLUID TEMP SEN (A/T FLUID TEMP SEN-
11. A/T Does Not Shift: D3 D4 ......................... 328 . SOR CIRCUIT AND TCM POWER SOURCE) ...... 381 . H
12. A/T Does Not Perform Lock-up ..................... 330 . Description ........................................................... 381
.
13. A/T Does Not Hold Lock-up Condition .......... 330 . Wiring Diagram -- AT -- BA/FTS ........................ 383 .
14. Lock-up Is Not Released ............................... 332 . Diagnostic Procedure .......................................... 384 .
I
15. Engine Speed Does Not Return To Idle (Light Component Inspection ......................................... 386 .
Braking D4 D3 ) ............................................... 332 . ENGINE SPEED SIGNAL ...................................... 387 .
16. Vehicle Does Not Start From D1 .................... 334 . Description ........................................................... 387
.
17. A/T Does Not Shift: D4 D3 , When Overdrive Wiring Diagram -- AT -- ENGSS ........................ 389 . J
Control Switch "ON" "OFF" ............................. 334 . Diagnostic Procedure .......................................... 390 .
18. A/T Does Not Shift: D3 22 , When Selector LINE PRESSURE SOLENOID VALVE .................. 392 .
Lever "D" "2" Position ..................................... 335 . Description ........................................................... 392
. K
19. A/T Does Not Shift: 22 11 , When Selector Wiring Diagram -- AT -- LPSV ........................... 394 .
Lever "2" "1" Position ...................................... 336 . Diagnostic Procedure .......................................... 395 .
20. Vehicle Does Not Decelerate By Engine Brake 337 . Component Inspection ......................................... 397 . L
21. TCM Self-diagnosis Does Not Activate (PNP & CAN COMMUNICATION LINE .............................. 399 .
Overdrive Control Switches, and Throttle Position Description ........................................................... 399
.
Sensor Circuit Checks) ....................................... 337 . On Board Diagnosis Logic ................................... 399 .
Self-Diagnosis Code Confirmation Procedure ..... 399 . M
ALL Wiring Diagram -- AT -- CAN ............................. 400 .
Diagnostic Procedure .......................................... 401 .
MAIN POWER SUPPLY AND GROUND CIRCUIT. 344 A/T SHIFT LOCK SYSTEM ................................... 402 .
Wiring Diagram -- AT -- MAIN ........................... 344 . Description ........................................................... 402
.
Diagnostic Procedure .......................................... 345 . Shift Lock System Electrical Parts Location ........ 402 .
VEHICLE SPEED SENSOR - A/T (REVOLUTION Wiring Diagram -- SHIFT -- ............................... 403 .
SENSOR) ............................................................... 347
. Diagnostic Procedure .......................................... 404 .
Description .......................................................... 347
. KEY INTERLOCK CABLE ..................................... 408 .
Wiring Diagram -- AT -- VSSAT ........................ 349 . Components ........................................................ 408.
Diagnostic Procedure .......................................... 350 . Removal .............................................................. 408
.
DTC VEHICLE SPEED SENSOR MTR ................. 352 . Installation ........................................................... 409
.
Description .......................................................... 352
. ON-VEHICLE SERVICE ......................................... 410 .
Wiring Diagram -- AT -- VSSMTR ..................... 354 . Control Valve Assembly and Accumulators ......... 410 .
Diagnostic Procedure .......................................... 355 . Control Cable Adjustment .................................... 412 .
ACCELE RATOR PEDAL POSITION (APP) SEN- Park/Neutral Position (PNP) Switch Adjustment . 412
SOR ....................................................................... 356
. Differential Side Oil Seal Replacement ............... 413 .
Description .......................................................... 356
. Revolution Sensor Replacement ......................... 413 .
AT-3
REMOVAL AND INSTALLATION .......................... 414 . Adjustment (1) ...................................................... 498
.
Removal .............................................................. 414
. Assembly (2) ........................................................ 504
.
Installation ............................................................ 415
. Adjustment (2) ...................................................... 508
.
OVERHAUL ............................................................ 417. Assembly (3) ........................................................ 512
.
OutputShaft,IdlerGear,ReductionPinionGearand SERVICE DATA AND SPECIFICATIONS (SDS) ... 519 .
Bearing Retainer .................................................. 417 . General Specifications ......................................... 519 .
Oil Channel .......................................................... 420
. Shift Schedule ...................................................... 519
.
Locations of Adjusting Shims, Needle Bearings, Stall Revolution .................................................... 519
.
Thrust Washers and Snap Rings ......................... 421 . Line Pressure ....................................................... 519
.
DISASSEMBLY ...................................................... 422 . Control Valves ...................................................... 520
.
Disassembly ........................................................ 422. Clutch and Brakes ................................................ 520 .
REPAIR FOR COMPONENT PARTS ..................... 436 . Clutch and Brake Return Springs ........................ 522 .
Manual Shaft ....................................................... 436. Oil Pump .............................................................. 522
.
Oil Pump .............................................................. 439
. Input Shaft ............................................................ 522
.
Control Valve Assembly ....................................... 443 . Planetary carrier ................................................... 522
.
Control Valve Upper Body ................................... 453 . Final Drive ............................................................ 523
.
Control Valve Lower Body ................................... 457 . Reduction Pinion Gear .........................................524 .
Reverse Clutch .................................................... 459 . Output Shaft ......................................................... 526
.
High Clutch .......................................................... 463
. Bearing Retainer .................................................. 527.
Forward and Overrun Clutches ........................... 468 . Total End Play ...................................................... 527
.
Low & Reverse Brake .......................................... 474 . Reverse Clutch End Play ..................................... 527 .
Rear Internal Gear, Forward Clutch Hub and Over- Accumulator ......................................................... 527
.
run Clutch Hub ..................................................... 478. Band Servo .......................................................... 528
.
OutputShaft,IdlerGear,ReductionPinionGearand Removal and Installation ...................................... 528 .
Bearing Retainer .................................................. 482 . Shift Solenoid Valves ........................................... 528 .
Band Servo Piston Assembly .............................. 487 . Solenoid Valves ................................................... 528.
Final Drive ........................................................... 492
. A/T Fluid Temperature Sensor ............................. 528 .
ASSEMBLY ............................................................ 497. Revolution Sensor ................................................ 528 .
Assembly (1) ........................................................ 497
. Dropping Resistor ................................................ 528 .
AT-4
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" ECS0096A
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual. AT
WARNING:
q 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 per-
formed by an authorized NISSAN/INFINITI dealer. D
q 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 SRS section. E
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors. F
Precautions for On Board Diagnostic (EURO-OBD) System of A/T and Engine --
Euro-OBD -- ECS0096B
G
The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver of
a malfunction causing emission deterioration.
CAUTION: H
q 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.
I
q 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.)
q Be sure to route and secure the harnesses properly after work. Interference of the harness with a J
bracket, etc. may cause the MI to light up due to a short circuit.
q 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. K
q Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.
L
Precautions for Trouble Diagnosis ECS0096C
CAN SYSTEM
q Do not apply voltage of 7.0V or higher to the measurement terminals. M
q Use the tester with its open terminal voltage being 7.0V or less.
Precautions for Harness Repair ECS0096D
CAN SYSTEM
q Solder the repaired parts, and wrap with tape. [Frays of twisted
line must be within 110 mm (4.33 in)]
PKIA0306E
AT-5
PRECAUTIONS
q Do not perform bypass wire connections for the repair
parts.(The spliced wire will become separated and the charac-
teristics of twisted line will be lost.)
PKIA0307E
Precautions ECS0096E
q Before connecting or disconnecting the TCM harness con-
nector, 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.
SEF289H
q 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
q Before replacing TCM, perform TCM input/output signal
inspection and make sure whether TCM functions properly
or not. (See page AT-107, "TCM Terminals and Reference
Value".)
MEF040DA
AT-6
PRECAUTIONS
q After performing each TROUBLE DIAGNOSIS, perform
"DTC (Diagnostic Trouble Code) CONFIRMATION PROCE- A
DURE".
The DTC should not be displayed in the "DTC CONFIRMA-
TION PROCEDURE" if the repair is completed.
B
q 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.
AT
q Disassembly should be done in a clean work area.
q Use lint-free cloth or towels for wiping parts clean. Common
shop rags can leave fibers that could interfere with the operation SAT652J
of the transaxle. D
q Place disassembled parts in order for easier and proper assembly.
q All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
E
reassembly.
q Gaskets, seals and O-rings should be replaced any time the transaxle is disassembled.
q It is very important to perform functional tests whenever they are indicated.
F
q 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.
G
q Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.
q 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.
H
q Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
q After overhaul, refill the transaxle with new ATF.
q When the A/T drain plug is removed, only some of the fluid is drained. Old A/T fluid will remain in torque I
converter and ATF cooling system.
Always follow the procedures under AT-13, "Changing A/T Fluid" when changing A/T fluid.
Service Notice or Precautions ECS0096F J
FAIL-SAFE
The TCM has an electronic Fail-Safe (limp home mode). This allows the vehicle to be driven even if a major
electrical input/output device circuit is damaged. K
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, O/D OFF indicator lamp blinks for about 8
seconds. Refer to AT-252, "Diagnostic Procedure Without CONSULT-II" (EXCEPT FOR EURO-OBD) or AT- L
51, "TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)" (EURO-OBD).
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. M
Always follow the "Work Flow", refer to AT-261 (EXCEPT FOR EURO-OBD) or AT-60 (EURO-OBD).
The SELF-DIAGNOSIS results will be as follows:
q The first SELF-DIAGNOSIS will indicate damage to the vehicle speed sensor or the revolution sensor.
q During the next SELF-DIAGNOSIS, performed after checking the sensor, no damages will be indicated.
TORQUE CONVERTER SERVICE
The torque converter should be replaced under any of the following conditions:
q External leaks in the hub weld area.
q Converter hub is scored or damaged.
q Converter pilot is broken, damaged or fits poorly into crankshaft.
q Steel particles are found after flushing the cooler and cooler lines.
q Pump is damaged or steel particles are found in the converter.
q 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.)
q Converter is contaminated with engine coolant containing antifreeze.
AT-7
PRECAUTIONS
q Internal failure of stator roller clutch.
q Heavy clutch debris due to overheating (blue converter).
q 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:
q The fluid has an odor, is discolored, and there is no evidence of metal or clutch facing particles.
q The threads in one or more of the converter bolt holes are damaged.
q 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.
q 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 SELF-DIAGNOSIS -- EURO-OBD --
q 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 lamp or the malfunction indicator (MI). Refer to the table on
AT-42, "SELF-DIAGNOSTIC RESULT TEST MODE" for the indicator used to display each self-diagnostic
result.
q The self-diagnostic results indicated by the MI are automatically stored in both the ECM and TCM memo-
ries.
Always perform the procedure AT-39, "HOW TO ERASE DTC" to complete the repair and avoid
unnecessary blinking of the MI.
q 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.
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