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AUTOMATIC TRANSAXLE
C TRANSMISSION/TRANSAXLE
SECTION
AUTOMATIC TRANSAXLE
AT
A
B
AT
D
CONTENTS
PRECAUTIONS ......................................................... 5 . Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" ................................................................. 5 . Precautions for On Board Diagnostic (EURO-OBD) System of A/T and Engine -- Euro-OBD -- ............ 5 . Precautions for Trouble Diagnosis .......................... 5 . Precautions for Harness Repair .............................. 5 . Precautions ............................................................. 6 . Service Notice or Precautions ................................. 7 . Wiring Diagrams and Trouble Diagnosis ................. 8 . PREPARATION .......................................................... 9 . Special Service Tools .............................................. 9 . Commercial Service Tools ..................................... 12 . A/T FLUID ................................................................ 13 . Checking A/T Fluid ................................................ 13 . Changing A/T Fluid ............................................... 13 . OVERALL SYSTEM ................................................ 14 . A/T Electrical Parts Location ................................. 14 . Circuit Diagram ..................................................... 15 . Cross-Sectional View ............................................ 16 . Hydraulic Control Circuit ....................................... 17 . Shift Mechanism .................................................... 18 . Control System ...................................................... 27 . Control Mechanism ............................................... 28 . Control Valve ......................................................... 34 . TROUBLE DIAGNOSIS -- INTRODUCTION .......... 56 . Introduction ............................................................ 56 . Work Flow .............................................................. 60 . TROUBLE DIAGNOSIS -- BASIC INSPECTION ... 63 A/T Fluid Check ..................................................... 63 . Stall Test ................................................................ 64 . Line Pressure Test ................................................. 67 . Road Test .............................................................. 68 . TROUBLE DIAGNOSIS -- GENERAL DESCRIPTION ......................................................................... 86 . Symptom Chart ...................................................... 86 . TCM Terminals and Reference Value .................. 107 . CAN COMMUNICATION ........................................ 110 . System Description .............................................. 110 . CAN Communication Unit .................................... 110 . DTC P0705 PARK/NEUTRAL POSITION (PNP) SWITCH ................................................................. 113 . Description ........................................................... 113 . Wiring Diagram -- AT -- PNP/SW ...................... 115 . Diagnostic Procedure .......................................... 116 . Component Inspection ......................................... 118 . DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT ................................................................. 119 . Description ........................................................... 119 . Wiring Diagram -- AT -- FTS ............................. 121 . Diagnostic Procedure .......................................... 122 . Component Inspection ......................................... 124 . DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR) .............................................. 125 . Description ........................................................... 125 . Wiring Diagram -- AT -- VSSA/T ....................... 128 . Diagnostic Procedure .......................................... 129 . DTC P0725 ENGINE SPEED SIGNAL .................. 131 . Description ........................................................... 131 . Wiring Diagram -- AT -- ENGSS ........................ 132 . Diagnostic Procedure .......................................... 133 . DTC P0731 A/T 1ST GEAR FUNCTION ............... 135 . Description ........................................................... 135 . Wiring Diagram -- AT -- 1ST .............................. 138 .
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EURO-OBD
TROUBLE DIAGNOSIS -- INDEX .......................... 35 . Alphabetical & P No. Index for DTC ...................... 35 . ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION ......................................................................... 37 . Introduction ........................................................... 37 . EURO-OBD Function for A/T System ................... 37 . One or Two Trip Detection Logic of EURO-OBD ... 37 EURO-OBD Diagnostic Trouble Code (DTC) ........ 37 . Malfunction Indicator (MI) .................................... .. 41 . CONSULT-II .......................................................... 41 . Diagnostic Procedure Without CONSULT-II .......... 50 .
AT-1
Diagnostic Procedure .......................................... 139 . Component Inspection ......................................... 140 . DTC P0732 A/T 2ND GEAR FUNCTION ............... 141 . Description ........................................................... 141 . Wiring Diagram -- AT -- 2ND ............................. 144 . Diagnostic Procedure .......................................... 145 . Component Inspection ......................................... 146 . DTC P0733 A/T 3RD GEAR FUNCTION ............... 147 . Description ........................................................... 147 . Wiring Diagram -- AT -- 3RD ............................. 150 . Diagnostic Procedure .......................................... 151 . Component Inspection ......................................... 152 . DTC P0734 A/T 4TH GEAR FUNCTION ............... 153 . Description ........................................................... 153 . Wiring Diagram -- AT -- 4TH .............................. 156 . Diagnostic Procedure .......................................... 157 . Component Inspection ......................................... 160 . DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE ................................................ 161 . Description ........................................................... 161 . Wiring Diagram -- AT -- TCV ............................. 163 . Diagnostic Procedure .......................................... 164 . Component Inspection ......................................... 164 . DTC P0745 LINE PRESSURE SOLENOID VALVE. 166 Description ........................................................... 166 . Wiring Diagram -- AT -- LPSV ........................... 168 . Diagnostic Procedure .......................................... 169 . Component Inspection ......................................... 171 . DTC P0750 SHIFT SOLENOID VALVE A .............. 173 . Description ........................................................... 173 . Wiring Diagram -- AT -- SSV/A .......................... 175 . Diagnostic Procedure .......................................... 176 . Component Inspection ......................................... 177 . DTC P0755 SHIFT SOLENOID VALVE B .............. 178 . Description ........................................................... 178 . Wiring Diagram -- AT -- SSV/B .......................... 180 . Diagnostic Procedure .......................................... 181 . Component Inspection ......................................... 182 . DTC P1705 ACCELERATOR PEDAL POSITION (APP) SENSOR ...................................................... 183 . Description ........................................................... 183 . Wiring Diagram -- AT -- TPS ............................. 186 . Diagnostic Procedure .......................................... 187 . DTC P1760 OVERRUN CLUTCH SOLENOID VALVE .................................................................... 189 . Description ........................................................... 189 . Wiring Diagram -- AT -- OVRCSV ..................... 191 . Diagnostic Procedure .......................................... 192 . Component Inspection ......................................... 193 . DTC U1000 CAN COMMUNICATION LINE ........... 194 . Description ........................................................... 194 . On Board Diagnosis Logic ................................... 194 . DTC Confirmation Procedure .............................. 194 . Wiring Diagram -- AT .......................................... 195 . Diagnostic Procedure .......................................... 196 . DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POWER SOURCE). 197 Description ........................................................... 197 . Wiring Diagram -- AT -- BA/FTS ........................ 199 .
Diagnostic Procedure ........................................... 200 . Component Inspection .........................................202 . DTC VEHICLE SPEED SENSOR MTR .................. 203 . Description ........................................................... 203 . Wiring Diagram -- AT -- VSSMTR ...................... 205 . Diagnostic Procedure ........................................... 206 . DTC CONTROL UNIT (RAM), CONTROL UNIT (ROM) ..................................................................... 207 . Description ........................................................... 207 . Diagnostic Procedure ........................................... 208 . DTC CONTROL UNIT (EEP ROM) ........................ 209 . Description ........................................................... 209 . Diagnostic Procedure ........................................... 210 . TROUBLE DIAGNOSES FOR SYMPTOMS .......... 211 . Wiring Diagram -- AT -- NONDTC ..................... 211 . 1. O/D OFF Indicator Lamp Does Not Come On . 213 2. Engine Cannot Be Started In "P" and "N" Position.214 3. In "P" Position, Vehicle Moves Forward Or Backward When Pushed .............................................. 214 . 4. In "N" Position, Vehicle Moves ......................... 216 . 5. Large Shock. "N" "R" Position ..................... 217 . 6. Vehicle Does Not Creep Backward In "R" Position .218 7. Vehicle Does Not Creep Forward In "D", "2" Or "1" Position ........................................................... 221 . 8. Vehicle Cannot Be Started From D1 ................ 223 . 9. A/T Does Not Shift: D1 D2 Or Does Not Kickdown: D4 D2 .................................................... 225 . 10. A/T Does Not Shift: D2 D3 ......................... 227 . 11. A/T Does Not Shift: D3 D4 .......................... 229 . 12. A/T Does Not Perform Lock-up ...................... 232 . 13. A/T Does Not Hold Lock-up Condition ........... 233 . 14. Lock-up Is Not Released ................................ 234 . 15. Engine Speed Does Not Return To Idle (Light Braking D4 D3 ) ................................................ 235 . 16. Vehicle Does Not Start From D1 .................... 236 . 17. A/T Does Not Shift: D4 D3 , When Overdrive Control Switch "ON" "OFF" .............................. 237 . 18. A/T Does Not Shift: D3 22 , When Selector Lever "D" "2" Position ...................................... 237 . 19. A/T Does Not Shift: 22 11 , When Selector Lever "2" "1" Position ....................................... 238 . 20. Vehicle Does Not Decelerate By Engine Brake.239 21. TCM Self-diagnosis Does Not Activate (PNP & Overdrive Control Switches, and Throttle Position Sensor Circuit Checks) ........................................ 239 .
EXC.F/EURO-OBD
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION ....................................................................... 246 . CONSULT-II ......................................................... 246 . Diagnostic Procedure Without CONSULT-II ........ 252 . TROUBLE DIAGNOSIS -- INTRODUCTION ........ 257 . Introduction .......................................................... 257 . Work Flow ............................................................ 261 . TROUBLE DIAGNOSIS -- BASIC INSPECTION .. 263 . A/T Fluid Check ................................................... 263 . Stall Test ............................................................... 264 .
AT-2
Line Pressure Test .............................................. 267 . Road Test ............................................................ 268 . TROUBLE DIAGNOSIS -- GENERAL DESCRIPTION ....................................................................... 285 . Symptom Chart ................................................... 285 . TCM Terminals and Reference Value .................. 304 . CAN COMMUNICATION ....................................... 307 . System Description ............................................. 307 . CAN Communication Unit ................................... 307 . TROUBLE DIAGNOSES FOR SYMPTOMS ......... 310 . Wiring Diagram -- AT -- NONDTC ..................... 310 . 1. O/D OFF Indicator Lamp Does Not Come On . 312 2. Engine Cannot Be Started In "P" and "N" Position 313 . 3. In "P" Position, Vehicle Moves Forward Or Backward When Pushed ............................................. 313 . 4. In "N" Position, Vehicle Moves ........................ 315 . 5. Large Shock. "N" "R" Position ..................... 316 . 6. Vehicle Does Not Creep Backward In "R" Position 317 . 7. Vehicle Does Not Creep Forward In "D", "2" Or "1" Position .......................................................... 320 . 8. Vehicle Cannot Be Started From D1 ................ 321 . 9. A/T Does Not Shift: D1 D2 Or Does Not Kick down: D4 D2 .................................................... 324 . 10. A/T Does Not Shift: D2 D3 ........................ 326 . 11. A/T Does Not Shift: D3 D4 ......................... 328 . 12. A/T Does Not Perform Lock-up ..................... 330 . 13. A/T Does Not Hold Lock-up Condition .......... 330 . 14. Lock-up Is Not Released ............................... 332 . 15. Engine Speed Does Not Return To Idle (Light Braking D4 D3 ) ............................................... 332 . 16. Vehicle Does Not Start From D1 .................... 334 . 17. A/T Does Not Shift: D4 D3 , When Overdrive Control Switch "ON" "OFF" ............................. 334 . 18. A/T Does Not Shift: D3 22 , When Selector Lever "D" "2" Position ..................................... 335 . 19. A/T Does Not Shift: 22 11 , When Selector Lever "2" "1" Position ...................................... 336 . 20. Vehicle Does Not Decelerate By Engine Brake 337 . 21. TCM Self-diagnosis Does Not Activate (PNP & Overdrive Control Switches, and Throttle Position Sensor Circuit Checks) ....................................... 337 .
ALL
MAIN POWER SUPPLY AND GROUND CIRCUIT. 344 Wiring Diagram -- AT -- MAIN ........................... 344 . Diagnostic Procedure .......................................... 345 . VEHICLE SPEED SENSOR - A/T (REVOLUTION SENSOR) ............................................................... 347 . Description .......................................................... 347 . Wiring Diagram -- AT -- VSSAT ........................ 349 . Diagnostic Procedure .......................................... 350 . DTC VEHICLE SPEED SENSOR MTR ................. 352 . Description .......................................................... 352 . Wiring Diagram -- AT -- VSSMTR ..................... 354 . Diagnostic Procedure .......................................... 355 . ACCELE RATOR PEDAL POSITION (APP) SENSOR ....................................................................... 356 . Description .......................................................... 356 .
Wiring Diagram -- AT -- TPS ............................. 358 . Diagnostic Procedure .......................................... 359 . SHIFT SOLENOID VALVE A ................................. 361 . Description ........................................................... 361 . Wiring Diagram -- AT -- SSV/A .......................... 363 . Diagnostic Procedure .......................................... 364 . Component Inspection ......................................... 365 . SHIFT SOLENOID VALVE B ................................. 366 . Description ........................................................... 366 . Wiring Diagram -- AT -- SSV/B .......................... 368 . Diagnostic Procedure .......................................... 369 . Component Inspection ......................................... 370 . OVERRUN CLUTCH SOLENOID VALVE .............. 371 . Description ........................................................... 371 . Wiring Diagram -- AT -- OVRCSV ..................... 373 . Diagnostic Procedure .......................................... 374 . Component Inspection ......................................... 375 . TORQUE CONVERTER CLUTCH SOLENOID VALVE .................................................................... 376 . Description ........................................................... 376 . Wiring Diagram -- AT -- TCV ............................. 378 . Diagnostic Procedure .......................................... 379 . Component Inspection ......................................... 380 . BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POWER SOURCE) ...... 381 . Description ........................................................... 381 . Wiring Diagram -- AT -- BA/FTS ........................ 383 . Diagnostic Procedure .......................................... 384 . Component Inspection ......................................... 386 . ENGINE SPEED SIGNAL ...................................... 387 . Description ........................................................... 387 . Wiring Diagram -- AT -- ENGSS ........................ 389 . Diagnostic Procedure .......................................... 390 . LINE PRESSURE SOLENOID VALVE .................. 392 . Description ........................................................... 392 . Wiring Diagram -- AT -- LPSV ........................... 394 . Diagnostic Procedure .......................................... 395 . Component Inspection ......................................... 397 . CAN COMMUNICATION LINE .............................. 399 . Description ........................................................... 399 . On Board Diagnosis Logic ................................... 399 . Self-Diagnosis Code Confirmation Procedure ..... 399 . Wiring Diagram -- AT -- CAN ............................. 400 . Diagnostic Procedure .......................................... 401 . A/T SHIFT LOCK SYSTEM ................................... 402 . Description ........................................................... 402 . Shift Lock System Electrical Parts Location ........ 402 . Wiring Diagram -- SHIFT -- ............................... 403 . Diagnostic Procedure .......................................... 404 . KEY INTERLOCK CABLE ..................................... 408 . Components ........................................................ 408 . Removal .............................................................. 408 . Installation ........................................................... 409 . ON-VEHICLE SERVICE ......................................... 410 . Control Valve Assembly and Accumulators ......... 410 . Control Cable Adjustment .................................... 412 . Park/Neutral Position (PNP) Switch Adjustment . 412 Differential Side Oil Seal Replacement ............... 413 . Revolution Sensor Replacement ......................... 413 .
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AT-3
REMOVAL AND INSTALLATION .......................... 414 . Removal .............................................................. 414 . Installation ............................................................ 415 . OVERHAUL ............................................................ 417 . OutputShaft,IdlerGear,ReductionPinionGearand Bearing Retainer .................................................. 417 . Oil Channel .......................................................... 420 . Locations of Adjusting Shims, Needle Bearings, Thrust Washers and Snap Rings ......................... 421 . DISASSEMBLY ...................................................... 422 . Disassembly ........................................................ 422 . REPAIR FOR COMPONENT PARTS ..................... 436 . Manual Shaft ....................................................... 436 . Oil Pump .............................................................. 439 . Control Valve Assembly ....................................... 443 . Control Valve Upper Body ................................... 453 . Control Valve Lower Body ................................... 457 . Reverse Clutch .................................................... 459 . High Clutch .......................................................... 463 . Forward and Overrun Clutches ........................... 468 . Low & Reverse Brake .......................................... 474 . Rear Internal Gear, Forward Clutch Hub and Overrun Clutch Hub ..................................................... 478 . OutputShaft,IdlerGear,ReductionPinionGearand Bearing Retainer .................................................. 482 . Band Servo Piston Assembly .............................. 487 . Final Drive ........................................................... 492 . ASSEMBLY ............................................................ 497 . Assembly (1) ........................................................ 497 .
Adjustment (1) ...................................................... 498 . Assembly (2) ........................................................ 504 . Adjustment (2) ...................................................... 508 . Assembly (3) ........................................................ 512 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 519 . General Specifications ......................................... 519 . Shift Schedule ...................................................... 519 . Stall Revolution .................................................... 519 . Line Pressure ....................................................... 519 . Control Valves ...................................................... 520 . Clutch and Brakes ................................................ 520 . Clutch and Brake Return Springs ........................ 522 . Oil Pump .............................................................. 522 . Input Shaft ............................................................ 522 . Planetary carrier ................................................... 522 . Final Drive ............................................................ 523 . Reduction Pinion Gear .........................................524 . Output Shaft ......................................................... 526 . Bearing Retainer .................................................. 527 . Total End Play ...................................................... 527 . Reverse Clutch End Play ..................................... 527 . Accumulator ......................................................... 527 . Band Servo .......................................................... 528 . Removal and Installation ...................................... 528 . Shift Solenoid Valves ........................................... 528 . Solenoid Valves ................................................... 528 . A/T Fluid Temperature Sensor ............................. 528 . Revolution Sensor ................................................ 528 . Dropping Resistor ................................................ 528 .
AT-4
PRECAUTIONS PRECAUTIONS PFP:00001 Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
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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 perD formed by an authorized NISSAN/INFINITI dealer. q Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air E Bag Module, see the SRS section. 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: 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. 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 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. q Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM and ECM before returning the vehicle to the customer.
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Precautions for Trouble Diagnosis
CAN SYSTEM
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ECS0096C
Do not apply voltage of 7.0V or higher to the measurement terminals. Use the tester with its open terminal voltage being 7.0V or less.
ECS0096D
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Precautions for Harness Repair
CAN SYSTEM
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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 characteristics of twisted line will be lost.)
PKIA0307E
Precautions
q
ECS0096E
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.
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
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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
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After performing each TROUBLE DIAGNOSIS, perform "DTC (Diagnostic Trouble Code) CONFIRMATION PROCEA DURE". The DTC should not be displayed in the "DTC CONFIRMATION PROCEDURE" if the repair is completed. B Before proceeding with disassembly, thoroughly clean the outside of the transaxle. It is important to prevent the internal parts from becoming contaminated by dirt or other foreign matter. AT Disassembly should be done in a clean work area. Use lint-free cloth or towels for wiping parts clean. Common SAT652J shop rags can leave fibers that could interfere with the operation D 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 E 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. F 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 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 parts. Apply petroleum jelly to protect O-rings and seals, or hold bearings and washers in place during assembly. Do not use grease. H 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 I converter and ATF cooling system. Always follow the procedures under AT-13, "Changing A/T Fluid" when changing A/T fluid.
ECS0096F
Service Notice or Precautions
FAIL-SAFE
J
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. Refer to AT-252, "Diagnostic Procedure Without CONSULT-II" (EXCEPT FOR EURO-OBD) or AT51, "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. 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.
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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
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.
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EURO-OBD SELF-DIAGNOSIS -- EURO-OBD --
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 memories. 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. PNP switch A/T 1st, 2nd, 3rd, or 4th gear function *: For details of EURO-OBD, refer to AT-37, "ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION" . q 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-7, "HARNESS CONNECTOR".
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Wiring Diagrams and Trouble Diagnosis
When you read wiring diagrams, refer to the following: q GI-11, "How to Read Wiring Diagrams" in GI section. q EL-11, "POWER SUPPLY ROUING" in EL section. When you perform trouble diagnosis, refer to the following: q GI-21, "How to Perform Efficient Diagnosis for an Electrical lncident" in GI section. q GI-31, "How to Follow Trouble Diagnoses" in GI section.
ECS0096G
AT-8
PREPARATION PREPARATION Special Service Tools
Tool number Tool name (J34301-C) Oil pressure gauge set 1 (J34301-1) Oil pressure gauge 2 (J34301-2) Hoses 3 (J34298) Adapter 4 (J34282-2) Adapter 5 (790-301-1230-A) 60°Adapter 6 (J34301-15) Square socket KV311030000 (J38982) Drift Description Measuring line pressure and governor pressure
PFP:00100
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ECS0096H
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AAT896
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Installing differential oil seal (Use with ST35325000.) a: 59mm (2.32 in) dia. b: 49mm (1.93 in) dia.
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NT105
ST35325000 ( - ) Drift
Installing differential oil seal (Use with KV311030000.) a: 215 mm (8.46 in) b: 25 mm (0.98 in) c: M12 x 1.5P
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NT417
KV38107700 (J39027) Preload adapter
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Measuring turning torque of final drive assembly Measuring clearance between side gear and differential case with washer Selecting differential side bearing adjusting shim
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NT087
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Removing and installing clutch return spring a: 320mm (12.0 in) b: 174 mm (6.85in)
KV31103200 (J34285-A and J34285-87) Clutch spring compressor
NT423
ST23540000 (J25689-A) Pin punch
Removing and installing parking rod plate, manual plate and differential pinion mate shaft retaining pins a: 2.3 mm (0.091 in) dia. b: 4 mm (0.16 in) dia.
NT442
AT-9
PREPARATION
Tool number Tool name KV32101000 (J25689-A) Pin punch Description Installing throttle lever and manual shaft retaining pins a: 4 mm (0.16 in) dia.
NT410
ST25710000 ( - ) Pin punch
Aligning groove of manual shaft and hole of transmission case a: 2 mm (0.08 in) dia.
NT410
ST3306S001 (J22888-D) Differential side bearing puller set 1 ST33051001 (J22888-D) Puller ST33061000 2 (J8107-2) Adapter KV381054S0 (J34286) Puller
Removing differential side bearing inner race a: 39 mm (1.54 in) dia. b: 29.5 mm (1.161 in) dia. c: 130 mm (5.12 in) d: 135 mm (5.31 in) e: 120 mm (4.72 in)
NT745
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Removing idler gear bearing outer race Removing differential side oil seals Removing differential side bearing outer race Removing needle bearing from bearing retainer
a: 250 mm (9.84 in) b: 160 mm (6.30 in)
NT414
ST27180001 (J25726-A) Puller
q
Removing idler gear
a: 100 mm (3.94 in) b: 110 mm (4.33 in) c: M8 x 1.25P
NT424
ST30031000 (J22912-1) Puller
Removing reduction gear bearing inner race a: 90 mm (3.54 in) dia. b: 50 mm (1.97 in) dia.
NT411
ST3527200 (J26092) Drift
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Installing reduction gear bearing inner race Installing idler gear bearing inner race
a: 72 mm (2.83 in) dia. b: 35.5 mm (1.398 in) dia.
NT426
AT-10
PREPARATION
Tool number Tool name ST37830000 ( - ) Drift Description
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Installing idler gear bearing outer race
a: 62 mm (2.44 in) dia. b: 39 mm (1.54 in) dia.
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NT427
ST35321000 ( - ) Drift
Installing output shaft bearing a: 49 mm (1.93 in) dia. b: 41 mm (1.61 in) dia.
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NT073
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Installing differential side bearing outer race a: 67mm (2.64 in) dia. b: 49 mm (1.93 in) dia.
ST30633000 ( - ) Drift
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NT073
ST35271000 (J26091) Drift
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Installing idler gear
a: 72 mm (2.83 in) dia. b: 63 mm (2.48 in) dia.
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NT115
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ST33400001 (J26082) Drift
NT115
q
Installing oil pump housing oil seal
a: 60 mm (2.36 in) dia. b: 47 mm (1.85 in) dia.
L
M
AT-11
PREPARATION Commercial Service Tools
Tool name Puller Description
q q
ECS0096I
Removing idler gear bearing inner race Removing and installing band servo piston snap ring
NT077
Drift
Removing idler gear bearing inner race a: 34 mm (1.34 in) dia.
NT109
Drift
Installing differential left side bearing a: 86 mm (3.39 in) dia. b: 80 mm (3.15 in) dia.
NT115
Drift
Installing differential right side bearing a: 46 mm (1.81 in) dia. b: 40 mm (1.57 in) dia.
NT115
AT-12
A/T FLUID A/T FLUID Checking A/T Fluid
1. 2. 3.
PFP:KLE40
A
ECS0096J
Warm up engine. Check for fluid leakage. Before driving, fluid level can be checked at fluid temperatures of 30 to 50°C (86 to 122°F) using "COLD" range on dipstick. a. Park vehicle on level surface and set parking brake. b. Start engine and move selector lever through each gear position. Leave selector lever in "P" position. c. Check fluid level with engine idling. d. Remove dipstick and note reading. If level is at low side of either SMA827CA range, and fluid to the charging pipe. e. Re-insert dipstick into charging pipe as far as it will go. f. Remove dipstick and note reading. If reading is at low side of range, add fluid to the charging pipe. Do not overfill. 4. Drive vehicle for approximately 5 minutes in urban areas. 5. Re-check fluid level at fluid temperatures of 50 to 80°C (122 to 176°F) using "HOT" range on dipstick. 6. Check fluid condition. q If fluid is very dark or smells burned, refer to AT section for checking operation of A/T. Flush cooling system after repair of A/T. q If A/T fluid contains frictional material (clutches, bands, etc.), replace radiator and flush cooler line using cleaning solvent and compressed air after repair of A/T. Refer to LC-16, "Radiator".
B
AT
D
E
F
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SMA853B
J
Changing A/T Fluid
1. 2. 3. Warm up A/T fluid. Stop engine. Drain A/T fluid from drain plug and refill with new A/T fluid. Always refill same volume with drained fluid. Fluid grade: Genuine Nissan ATF or equivalent. Refer to MA13, "Recommend Fluids and Lubricants". Fluid capacity (With torque converter): Approx. 7.7 (6-3/4 lmp qt)
ECS0096K
K
L
M
SMA027D
Drain plug: : 29 - 39 N·m (3.0 - 4.0 kg-m, 22 - 29 ft-lb) 4. 5. Run engine at idle speed for five minutes. Check fluid level and condition. Refer to AT-13, "Checking A/T Fluid" . If fluid is still dirty, repeat steps 2 through 5.
AT-13
OVERALL SYSTEM OVERALL SYSTEM A/T Electrical Parts Location
PFP:00000
ECS0096L
MCIA0065E
AT-14
OVERALL SYSTEM Circuit Diagram
ECS0096M
A
B
AT
D
E
F
G
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YAT368A
AT-15
OVERALL SYSTEM Cross-Sectional View
ECS0096N
SAT842J
AT-16
OVERALL SYSTEM Hydraulic Control Circuit
ECS0096O
A
B
AT
D
E
F
G
H
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L
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SAT844J
AT-17
OVERALL SYSTEM Shift Mechanism
CONSTRUCTION
ECS0096P
SAT998I
1. 4. 7.
Torque converter Brake band Front sun gear
2. 5. 8.
Oil pump Reverse clutch Front pinion gear
3. 6. 9.
Input shaft High clutch Front internal gear
10. Front planetary carrier 13. Rear internal gear 16. Forward one-way clutch 19. Low & reverse brake 22. Output shaft
11. Rear sun gear 14. Rear planetary carrier 17. Overrun clutch 20. Parking pawl 23. Idle gear
12. Rear pinion gear 15. Forward clutch 18. Low one-way clutch 21. Parking gear 24. Output gear
FUNCTION OF CLUTCH AND BRAKE
Clutch and brake components 5 Reverse clutch 6 High clutch 15 Forward clutch 17 Overrun clutch 4 Brake band 16 Forward one-way clutch 18 Low one-way clutch 19 Low & reverse brake Abbr. R/C H/C F/C O/C B/B F/O.C L/O.C L & R/B Function To transmit input power to front sun gear 7 . To transmit input power to front planetary carrier 10 . To connect front planetary carrier 10 with forward one-way clutch 16 . To connect front planetary carrier 10 with rear internal gear 13 . To lock front sun gear 7 . When forward clutch 15 is engaged, to stop rear internal gear 13 from rotating in opposite direction against engine revolution. To stop front planetary carrier 10 from rotating in opposite direction against engine revolution. To lock front planetary carrier 10 .
CLUTCH AND BAND CHART
Shift position Reverse clutch 5 High clutch 6 Forward clutch 15 Overrun clutch 17 Band servo 2nd apply 3rd release 4th apply Forward one-way clutch 16 Low oneway clutch 18 Low & revers e brake 19 Lockup
Remarks
P R N
PARK POSITION REVERSE POSITION NEUTRAL POSITION
AT-18
OVERALL SYSTEM
Forward clutch 15 Overrun clutch 17 *1D *1A *1A C D A *2C *3C C C B B B B B Automatic shift 12 Locks (held stationary) in 1st speed 12 Band servo 2nd apply 3rd release 4th apply Forward one-way clutch 16 B B B *5 Low oneway clutch 18 B Automatic shift 123 4 Low & revers e brake 19
Shift position
Reverse clutch 5
High clutch 6
Lockup
A
Remarks
B
1st 2nd D*4 3rd 4th 1st 2 2nd 1st 1 2nd
q q
AT
D
E
*1: Operates when overdrive control switch is set in "OFF" position. *2: Oil pressure is applied to both 2nd "apply" side and 3rd "release" side of band servo piston. However, brake band does not contract because oil pressure area on the "release" side is greater than that on the "apply" side. *3: Oil pressure is applied to 4th "apply" side in condition *2 above, and brake band contracts. *4: A/T will not shift to 4th when overdrive control switch is set in "OFF" position. *5: Operates when overdrive control switch is "OFF". : 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.
F
q q q q q q q q
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AT-19
OVERALL SYSTEM
POWER TRANSMISSION "N" and "P" Positions
q
q
"N" position Power from the input shaft is not transmitted to the output shaft because the clutches do not operate. "P" position Similar to the "N" position, the clutches do not operate. The parking pawl engages with the parking gear to mechanically hold the output shaft so that the power train is locked.
SAT991I
AT-20
OVERALL SYSTEM
"11 " Position
q q q q
Forward clutch Forward one-way clutch Overrun clutch Low and reverse brake
As overrun clutch engages, rear internal gear is locked by the operation of low & reverse brake. This is different from that of D1 and 21 .
A
B
Overrun clutch always engages, therefore engine brake can be obtained when decelerating.
Engine brake
AT
D
E
F
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H
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K
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SAT374J
M
AT-21
OVERALL SYSTEM
"D1 " and "21 " Positions
q q q
Forward one-way clutch Forward clutch Low one-way clutch
Rear internal gear is locked to rotate counterclockwise because of the functioning of these three clutches.
Overrun clutch engagement conditions (Engine brake)
D1 : Overdrive control switch "OFF" and throttle opening is less than 3/16 21 : Operates when throttle opening is less than 3/16, but does not affect engine brake. At D1 and 21 positions, engine brake is not activated due to free turning of low oneway clutch.
SAT377J
AT-22
OVERALL SYSTEM
"D2 ", "22 " and "12 " Positions
q q
Forward clutch Forward one-way clutch Brake band
q
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 oneway clutch, this rotation of rear internal gear increases the speed of rear planetary carrier compared with that of the 1st speed. D2 : Overdrive control switch "OFF" and throttle opening is less than 3/16 22: Operates when throttle opening is less than 3/16, but does not affect engine brake. 12 : Always engaged
A
B
Overrun clutch engagement conditions
AT
D
E
F
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SAT378J
M
AT-23
OVERALL SYSTEM
"D3 " Position
q q q
High clutch Forward clutch Forward one-way clutch
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. D3 : Overdrive control switch "OFF" and throttle opening is less than 3/16
Overrun clutch engagement conditions
SAT379J
AT-24
OVERALL SYSTEM
"D4 " (OD) Position
q q q
High clutch Brake band Forward clutch (Does not affect power transmission)
Input power is transmitted to front planetary carrier through high clutch. This front planetary carrier turns around the front sun gear which is fixed by brake band and makes front internal gear (output) turn faster.
A
B
At D4 position, there is no one-way clutch in the power transmission line and engine brake can be obtained when decelerating.
Engine brake
AT
D
E
F
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SAT380J
M
AT-25
OVERALL SYSTEM
"R" Position
q q
Reverse clutch Low and reverse brake
Front planetary carrier is stationary because of the operation of low & reverse brake. Input power is transmitted to front sun gear through reverse clutch, which drives front internal gear in the opposite direction. As there is no one-way clutch in the power transmission line, engine brake can be obtained when decelerating.
Engine brake
SAT381J
AT-26
OVERALL SYSTEM Control System
OUTLINE
The automatic transaxle senses vehicle operating conditions through various switches and sensors. It always controls the optimum shift position and reduces shifting and lock-up shocks.
SWITCHES & SENSORS PNP switch Throttle position sensor* Engine speed signal A/T fluid temperature sensor Revolution sensor Vehicle speed sensor Overdrive control switch Stop lamp switch TCM Shift control Line pressure control Lock-up control Overrun clutch control Timing control Fail-safe control Self-diagnosis CONSULT-II communication line control 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
ECS0096Q
A
B
AT
D
E
*: This sensor means Accelerator pedal position (APP) sensor.
CONTROL SYSTEM
F
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SCIA0690E
AT-27
OVERALL SYSTEM
TCM FUNCTION
The function of the TCM is to: q Receive input signals sent from various switches and sensors. q Determine required line pressure, shifting point, lock-up operation, and engine brake operation. q Send required output signals to the respective solenoid valves.
INPUT/OUTPUT SIGNAL OF TCM
Sensors, switches and solenoid valves PNP switch Throttle position sensor (accelerator pedal position (APP) sensor) Engine speed signal A/T fluid temperature sensor Input Revolution sensor Vehicle speed sensor Overdrive control switch Stop lamp switch Shift solenoid valve A/B Line pressure solenoid valve Output Torque converter clutch solenoid valve Overrun clutch solenoid valve O/D OFF indicator lamp Function Detects select lever position and sends a signal to TCM. Detects throttle valve position and sends a signal to TCM. From ECM. Detects transmission fluid temperature and sends a signal to TCM. Detects output shaft rpm 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 "D4 " (overdrive) position, to the TCM. Releases lock-up system when depressing pedal in lock-up condition. 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. Shows TCM faults when A/T control components malfunction.
ECS0096R
Control Mechanism
LINE PRESSURE CONTROL
TCM has various line pressure control characteristics to match the driving conditions. An ON-OFF duty signal is sent to the line pressure solenoid valve based on TCM characteristics. Hydraulic pressure on the clutch and brake is electronically controlled through the line pressure solenoid valve to accommodate engine torque. This results in smooth shift operation.
Normal Control
The line pressure to throttle opening characteristics is set for suitable clutch operation.
SAT003J
AT-28
OVERALL SYSTEM
Back-up Control (Engine Brake)
If the selector lever is shifted to "2" position while driving in D4 (OD) or D3 , great driving force is applied to the clutch inside the transmission. Clutch operating pressure (line pressure) must be increased to deal with this driving force.
A
B
AT
SAT004J
D
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.
E
F
G
SAT005J
H
At Low Fluid Temperature
q
q
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. 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.
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SAT006J
M
q
Line pressure is increased to a maximum irrespective of the throttle opening when fluid temperature drops to -10°C (14°F). This pressure rise is adopted to prevent a delay in clutch and brake operation due to extreme drop of fluid viscosity at low temperature.
SAT007J
AT-29
OVERALL SYSTEM
SHIFT CONTROL
The shift is regulated entirely by electronic control to accommodate vehicle speed and varying engine operations. This is accomplished by electrical signals transmitted by the revolution sensor and throttle position sensor. This results in improved acceleration performance and fuel economy.
Control of Shift Solenoid Valves A and B
The TCM activates shift solenoid valves A and B according to signals from the throttle position sensor and revolution sensor to select the optimum gear position on the basis of the shift schedule memorized in the TCM. The shift solenoid valve performs simple ON-OFF operation. When set to "ON", the drain circuit closes and pilot pressure is applied to the shift valve.
SAT008J
Relation Between Shift Solenoid Valves A and B and Gear Positions
Gear position Shift solenoid valve A B D1 , 21 , 11 ON (Closed) ON (Closed) D 2 , 2 2 , 12 OFF (Open) ON (Closed) D3 OFF (Open) OFF (Open) D4 (OD) ON (Closed) OFF (Open) N-P ON (Closed) ON (Closed)
Control of Shift Valves A and B
SAT009J
Pilot pressure generated by the operation of shift solenoid valves A and B is applied to the end face of shift valves A and B. The drawing above shows the operation of shift valve B. When the shift solenoid valve is "ON", pilot pressure applied to the end face of the shift valve overcomes spring force, moving the valve to right side on illustration.
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 an 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 Selector lever Gear position Vehicle speed sensor Throttle position sensor Closed throttle position switch A/T fluid temperature sensor D4 ON "D" position D3 OFF
More than set value Less than set opening OFF More than 40°C (104°F)
AT-30
OVERALL SYSTEM
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 OFFtime increases in one cycle, the pilot pressure drain time is reduced and pilot pressure remains high.
A
B
AT
SAT010J
D
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
SAT011J
E
F
G
H
Torque Converter Clutch Control Valve Operation
I
J
K
MCIB9000E
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.
L
M
AT-31
OVERALL SYSTEM
OVERRUN CLUTCH CONTROL (ENGINE BRAKE CONTROL)
Forward one-way clutch is used to reduce shifting shocks in downshifting operations. This clutch transmits engine torque to the wheels. However, drive force from the wheels is not transmitted to the engine because the one-way clutch rotates idle. This means the engine brake is not effective. The overrun clutch operates when the engine brake is needed.
Overrun Clutch Operating Conditions
Selector lever position "D" position move to center "2" position move to center "1" position move to center Gear position D1 , D2 , D3 gear position 21 , 22 gear position 11 , 12 gear position Less than 3/16 At any position Throttle opening
SAT014J
Overrun Clutch Solenoid Valve Control
The overrun clutch solenoid valve is operated by an ON-OFF signal transmitted by the TCM to provide overrun clutch control (engine brake control). When this solenoid valve is "ON", the pilot pressure drain port closes. When it is "OFF", the drain port opens. During the solenoid valve "ON" pilot pressure is applied to the end face of the overrun clutch control valve.
SAT015J
AT-32
OVERALL SYSTEM
Overrun Clutch Control Valve Operation
When the solenoid valve is "ON", pilot pressure is applied to the overrun clutch control valve. This pushes up the overrun clutch control valve. The line pressure is then shut off so that the clutch does not engage. When the solenoid valve is "OFF", pilot pressure is not generated. At this point, the overrun clutch control valve moves downward by spring force. As a result, overrun clutch operation pressure is provided by the overrun clutch reducing valve. This causes the overrun clutch to engage. In the 1 position, the overrun clutch control valve remains pushed down so that the overrun clutch is engaged at all times.
A
B
AT
D
E
F
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SAT016J
H
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K
L
M
AT-33
OVERALL SYSTEM Control Valve
FUNCTION OF CONTROL VALVES
Valve name Pressure regulator valve, plug and sleeve Pressure modifier valve and sleeve Pilot valve Accumulator control valve Manual valve Shift valve A Function Regulates oil discharged from the oil pump to provide optimum line pressure for all driving conditions. Used as a signal supplementary valve to the pressure regulator valve. Regulates pressure-modifier pressure (signal pressure) which controls optimum line pressure for all driving conditions. Regulates line pressure to maintain a constant pilot pressure level which controls lock-up mechanism, overrun clutch, shift timing. Regulates accumulator back-pressure to pressure suited to driving conditions. Directs line pressure to oil circuits corresponding to select positions. Hydraulic pressure drains when the shift lever is in Neutral. Simultaneously switches four oil circuits using output pressure of shift solenoid valve A to meet driving conditions (vehicle speed, throttle opening, etc.). Provides automatic downshifting and up-shifting (1st 2nd 3rd 4th gears/4th 3rd 2nd 1st gears) in combination with shift valve B. Simultaneously switches 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. Switches hydraulic circuits to prevent engagement of the overrun clutch simultaneously with application of the brake band in D4 . (Interlocking occurs if the overrun clutch engages during D4 .) Reduces low & reverse brake pressure to dampen engine-brake shock when down-shifting from the "1" position 12 to 11 . 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. Prevents an excessive rise in torque converter pressure. Activates or deactivates the lock-up function. Also provides smooth lock-up through transient application and release of the lock-up system. Dampens the shock encountered when 2nd gear band servo contracts, and provides smooth shifting. Switches oil pressure with 3-2 timing valve according to throttle opening. Reduces shock when down-shifting from 3rd to 2nd and regulates overrun clutch. Regulates oil pressure which causes lock-up when driving at low speeds.
ECS0096S
Shift valve B
Overrun clutch control valve 1st reducing valve Overrun clutch reducing valve
Torque converter relief valve Torque converter clutch control valve, plug and sleeve 1-2 accumulator valve and piston 3-2 timing valve Shuttle control valve Cooler check valve
AT-34
TROUBLE DIAGNOSIS -- INDEX
[EURO-OBD]
TROUBLE DIAGNOSIS -- INDEX Alphabetical & P No. Index for DTC
[EURO-OBD]
PFP:00000
A
ECS0096T
ALPHABETICAL INDEX FOR DTC
Check if the vehicle is a model with EURO-OBD system or not by the "Type approval number" on the identification plate. Refer to GI-40, "Identification Plate".
Type approval number Available Not available (blank) DTC Items (CONSULT-II screen terms) CONSULT-II GST*1 P0731 P0732 P0733 P0734 AT-135, "DTC P0731 A/T 1ST GEAR FUNCTION" AT-141, "DTC P0732 A/T 2ND GEAR FUNCTION" AT-147, "DTC P0733 A/T 3RD GEAR FUNCTION" AT-153, "DTC P0734 A/T 4TH GEAR FUNCTION" AT-119, "DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT" AT-131, "DTC P0725 ENGINE SPEED SIGNAL" AT-166, "DTC P0745 LINE PRESSURE SOLENOID VALVE" AT-189, "DTC P1760 OVERRUN CLUTCH SOLENOID VALVE" AT-113, "DTC P0705 PARK/ NEUTRAL POSITION (PNP) SWITCH" AT-173, "DTC P0750 SHIFT SOLENOID VALVE A" AT-178, "DTC P0755 SHIFT SOLENOID VALVE B" AT-161, "DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE" AT-183, "DTC P1705 ACCELERATOR PEDAL POSITION (APP) SENSOR" AT-125, "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)" AT-194, "DTC U1000 CAN COMMUNICATION LINE" Reference page Model With EURO-OBD system Without EURO-OBD system
B
AT
D
A/T 1ST GR FNCTN A/T 2ND GR FNCTN A/T 3RD GR FNCTN A/T 4TH GR FNCTN
E
F
G
ATF TEMP SEN/CIRC
P0710
H
ENGINE SPEED SIG
P0725
I
L/PRESS SOL/CIRC
P0745
J
O/R CLTCH SOL/CIRC
P1760
K
PNP SW/CIRC
P0705
SFT SOL A/CIRC*2 SFT SOL B/CIRC*2
P0750 P0755
L
M
TCC SOLENOID/CIRC
P0740
TP SEN/CIRC A/T*2
P1705
VEH SPD SEN/CIR AT*3
P0720
CAN COMM CIRCUIT
q q q
U1000
*1: These numbers are prescribed by ISO 15031-5. *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-35
TROUBLE DIAGNOSIS -- INDEX
[EURO-OBD]
P NO. INDEX FOR DTC
Check if the vehicle is a model with EURO-OBD system or not by the "Type approval number" on the identification plate. Refer to GI-40, "Identification Plate".
Type approval number Available Not available (blank) DTC CONSULT-II GST*
1
Model With EURO-OBD system Without EURO-OBD system
Items (CONSULT-II screen terms)
Reference page
P0705
PNP SW/CIRC
AT-113, "DTC P0705 PARK/ NEUTRAL POSITION (PNP) SWITCH" AT-119, "DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT" AT-125, "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)" AT-131, "DTC P0725 ENGINE SPEED SIGNAL" AT-135, "DTC P0731 A/T 1ST GEAR FUNCTION" AT-141, "DTC P0732 A/T 2ND GEAR FUNCTION" AT-147, "DTC P0733 A/T 3RD GEAR FUNCTION" AT-153, "DTC P0734 A/T 4TH GEAR FUNCTION" AT-161, "DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE" AT-166, "DTC P0745 LINE PRESSURE SOLENOID VALVE" AT-173, "DTC P0750 SHIFT SOLENOID VALVE A" AT-178, "DTC P0755 SHIFT SOLENOID VALVE B" AT-183, "DTC P1705 ACCELERATOR PEDAL POSITION (APP) SENSOR" AT-189, "DTC P1760 OVERRUN CLUTCH SOLENOID VALVE" AT-194, "DTC U1000 CAN COMMUNICATION LINE"
P0710
ATF TEMP SEN/CIRC
P0720
VEH SPD SEN/CIR AT*3
P0725 P0731 P0732 P0733 P0734
ENGINE SPEED SIG A/T 1ST GR FNCTN A/T 2ND GR FNCTN A/T 3RD GR FNCTN A/T 4TH GR FNCTN
P0740
TCC SOLENOID/CIRC
P0745
L/PRESS SOL/CIRC
P0750 P0755
SFT SOL A/CIRC*2 SFT SOL B/CIRC*2
P1705
TP SEN/CIRC A/T*2
P1760
O/R CLTCH SOL/CIRC
U1000
q q q
CAN COMM CIRCUIT
*1: These numbers are prescribed by ISO 15031-5. *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-36
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
[EURO-OBD]
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION Introduction
PFP:00000
A
ECS0096U
The A/T system has two self-diagnostic systems. The first is the emission-related on board diagnostic system (EURO-OBD) performed by the TCM in combina- B tion with the ECM. The malfunction is indicated by the MI (malfunction indicator) and is stored as a DTC in the ECM memory but not the TCM memory. The second is the TCM original self-diagnosis indicated by the O/D OFF indicator lamp. The malfunction is stored in the TCM memory. The detected items are overlapped with EURO-OBD self-diagnostic items. For AT detail, refer to AT-37, "ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION" .
EURO-OBD Function for A/T System
ECS0096V
D
The ECM provides emission-related on board diagnostic (EURO-OBD) functions for the A/T system. One function is to receive a signal from the TCM used with EURO-OBD-related parts of the A/T system. The signal is sent to the ECM when a malfunction occurs in the corresponding EURO-OBD-related part. The other function is to indicate a diagnostic result by means of the MI (malfunction indicator) on the instrument panel. Sensors, switches and solenoid valves are used as sensing elements. The MI automatically illuminates in One or Two Trip Detection Logic when a malfunction is sensed in relation to A/T system parts.
E
F
One or Two Trip Detection Logic of EURO-OBD
ONE TRIP DETECTION LOGIC
ECS0096W
If a malfunction is sensed during the first test drive, the MI will illuminate and the malfunction will be stored in the ECM memory as a DTC. The TCM is not provided with such a memory function.
G
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 MI will not illuminate. -- First Trip If the same malfunction as that experienced during the first test drive is sensed during the second test drive, the MI will illuminate. -- Second Trip A/T-related parts for which the MI illuminates during the first or second test drive are listed below.
MI Items Shift solenoid valve A -- DTC: P0750 Shift solenoid valve B -- DTC: P0755 Throttle position sensor -- DTC: P1705 Except above One trip detection X X X X Two trip detection