FLUID NISSAN ALMERA N16 2003 Electronic Service Manual

SMA067C
Changing M/T OilNJMT00881. Drain oil from drain plug and refill with new gear oil.
2. Check oil level.
Oil grade:
API GL-4
Viscosity:
Refer to MA-19, “RECOMMENDED FLUIDS AND
LUBRICANTS”.
Capacity:
RS5F50A 4.5 - 4.8(7-7/8 - 8-1/2 Imp pt)
Drain plug:
: 15 - 20 N·m (1.5 - 2.0 kg-m, 11 - 14 ft-lb)
SMA066C
CheckingNJMT0089OIL LEAK AND OIL LEVELNJMT0089S01Check for oil leakage and oil level.
Never start engine while checking oil level.
Filler plug:
: 25 - 34 N·m (2.5 - 3.5 kg-m, 18 - 25 ft-lb)
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M/T OILRS5F50A
Changing M/T Oil
MT-15

AT-1
AUTOMATIC TRANSAXLE
C TRANSMISSION/TRANSAXLE
CONTENTS
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SECTION
A
B
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AUTOMATIC TRANSAXLE
PRECAUTIONS .......................................................... 5
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 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
EURO-OBD
TROUBLE DIAGNOSIS — INDEX ........................... 35
Alphabetical & P No. Index for DTC ....................... 35
ON BOARD DIAGNOSTIC SYSTEM DESCRIP-
TION .......................................................................... 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 ........... 50TROUBLE 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 DESCRIP-
TION .......................................................................... 86
Symptom Chart ....................................................... 86
TCM Terminals and Reference Value ...................106
CAN COMMUNICATION .........................................109
System Description ...............................................109
CAN Communication Unit .....................................109
DTC P0705 PARK/NEUTRAL POSITION (PNP)
SWITCH ...................................................................111
Description .............................................................111
Wiring Diagram — AT — PNP/SW .......................113
Diagnostic Procedure ...........................................114
Component Inspection ..........................................116
DTC P0710 A/T FLUID TEMPERATURE SENSOR
CIRCUIT ..................................................................117
Description ............................................................117
Wiring Diagram — AT — FTS ..............................119
Diagnostic Procedure ...........................................120
Component Inspection ..........................................122
DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR) ...............................................123
Description ............................................................123
Wiring Diagram — AT — VSSA/T ........................126
Diagnostic Procedure ...........................................127
DTC P0725 ENGINE SPEED SIGNAL ...................129
Description ............................................................129
Wiring Diagram — AT — ENGSS .........................130
Diagnostic Procedure ..........................................
.131
DTC P0731 A/T 1ST GEAR FUNCTION ................133
Description ............................................................133
Wiring Diagram — AT — 1ST ...............................136

AT-2
Diagnostic Procedure ...........................................137
Component Inspection ..........................................138
DTC P0732 A/T 2ND GEAR FUNCTION ................139
Description ............................................................139
Wiring Diagram — AT — 2ND ..............................142
Diagnostic Procedure ...........................................143
Component Inspection ..........................................144
DTC P0733 A/T 3RD GEAR FUNCTION ................145
Description ............................................................145
Wiring Diagram — AT — 3RD ..............................148
Diagnostic Procedure ...........................................149
Component Inspection ..........................................150
DTC P0734 A/T 4TH GEAR FUNCTION ................151
Description ............................................................151
Wiring Diagram — AT — 4TH ...............................154
Diagnostic Procedure ...........................................155
Component Inspection ..........................................158
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE .................................................159
Description ............................................................159
Wiring Diagram — AT — TCV ..............................161
Diagnostic Procedure ...........................................162
Component Inspection ..........................................163
DTC P0745 LINE PRESSURE SOLENOID VALVE .164
Description ............................................................164
Wiring Diagram — AT — LPSV ............................166
Diagnostic Procedure ...........................................167
Component Inspection ..........................................169
DTC P0750 SHIFT SOLENOID VALVE A ...............171
Description ............................................................171
Wiring Diagram — AT — SSV/A ...........................173
Diagnostic Procedure ...........................................174
Component Inspection ..........................................175
DTC P0755 SHIFT SOLENOID VALVE B ...............176
Description ............................................................176
Wiring Diagram — AT — SSV/B ...........................178
Diagnostic Procedure ...........................................179
Component Inspection ..........................................179
DTC P1705 ACCELERATOR PEDAL POSITION
(APP) SENSOR .......................................................181
Description ............................................................181
Wiring Diagram — AT — TPS ..............................184
Diagnostic Procedure ...........................................185
DTC P1760 OVERRUN CLUTCH SOLENOID
VALVE .....................................................................187
Description ............................................................187
Wiring Diagram — AT — OVRCSV ......................189
Diagnostic Procedure ...........................................190
Component Inspection ..........................................191
DTC U1000 CAN COMMUNICATION LINE ............192
Description ............................................................192
On Board Diagnosis Logic ....................................192
DTC Confirmation Procedure ...............................192
Wiring Diagram — AT ...........................................193
Diagnostic Procedure ...........................................194
DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP
SENSOR CIRCUIT AND TCM POWER SOURCE) .195
Description ............................................................195
Wiring Diagram — AT — BA/FTS .........................197Diagnostic Procedure ............................................198
Component Inspection ..........................................200
DTC VEHICLE SPEED SENSOR MTR ...................201
Description ............................................................201
Wiring Diagram — AT — VSSMTR .......................203
Diagnostic Procedure ............................................204
DTC CONTROL UNIT (RAM), CONTROL UNIT
(ROM) ......................................................................205
Description ............................................................205
Diagnostic Procedure ............................................206
DTC CONTROL UNIT (EEP ROM) .........................207
Description ............................................................207
Diagnostic Procedure ............................................208
TROUBLE DIAGNOSES FOR SYMPTOMS ...........209
Wiring Diagram — AT — NONDTC ......................209
1. O/D OFF Indicator Lamp Does Not Come On ..211
2. Engine Cannot Be Started In “P” and “N” Position .212
3. In “P” Position, Vehicle Moves Forward Or Back-
ward When Pushed ...............................................213
4. In “N” Position, Vehicle Moves ..........................214
5. Large Shock. “N” → “R” Position ......................215
6. Vehicle Does Not Creep Backward In “R” Position .216
7. Vehicle Does Not Creep Forward In “D”, “2” Or
“1” Position ............................................................219
8. Vehicle Cannot Be Started From D
1 .................221
9. A/T Does Not Shift: D
1→ D2 Or Does Not Kick-
down: D
4→ D2 .....................................................223
10. A/T Does Not Shift: D
2→ D3 ..........................225
11. A/T Does Not Shift: D
3→ D4 ...........................227
12. A/T Does Not Perform Lock-up .......................230
13. A/T Does Not Hold Lock-up Condition ............231
14. Lock-up Is Not Released .................................232
15. Engine Speed Does Not Return To Idle (Light
Braking D
4→ D3 ) .................................................233
16. Vehicle Does Not Start From D
1 .....................234
17. A/T Does Not Shift: D
4→ D3 , W h e n O v e r d r i v e
Control Switch “ON” → “OFF” ...............................235
18. A/T Does Not Shift: D
3→ 22 , When Selector
Lever “D” → “2” Position .......................................235
19. A/T Does Not Shift: 2
2→ 11 , When Selector
Lever “2” → “1” Position ........................................236
20. Vehicle Does Not Decelerate By Engine Brake .237
21. TCM Self-diagnosis Does Not Activate (PNP &
Overdrive Control Switches, and Throttle Position
Sensor Circuit Checks) .........................................237
EXC.F/EURO-OBD
ON BOARD DIAGNOSTIC SYSTEM DESCRIP-
TION ........................................................................244
CONSULT-II ..........................................................244
Diagnostic Procedure Without CONSULT-II .........250
TROUBLE DIAGNOSIS — INTRODUCTION .........255
Introduction ...........................................................255
Work Flow .............................................................259
TROUBLE DIAGNOSIS — BASIC INSPECTION ...261
A/T Fluid Check ....................................................261
Stall Test ................................................................262

AT-3
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AT Line Pressure Test ............................................... 265
Road Test ............................................................. 266
TROUBLE DIAGNOSIS — GENERAL DESCRIP-
TION ........................................................................ 283
Symptom Chart .................................................... 283
TCM Terminals and Reference Value ................... 302
CAN COMMUNICATION ........................................ 305
System Description .............................................. 305
CAN Communication Unit .................................... 305
TROUBLE DIAGNOSES FOR SYMPTOMS .......... 307
Wiring Diagram — AT — NONDTC ...................... 307
1. O/D OFF Indicator Lamp Does Not Come On . 309
2. Engine Cannot Be Started In “P” and “N” Position . 309
3. In “P” Position, Vehicle Moves Forward Or Back-
ward When Pushed .............................................. 310
4. In “N” Position, Vehicle Moves .......................... 311
5. Large Shock. “N” → “R” Position ...................... 312
6. Vehicle Does Not Creep Backward In “R” Position . 313
7. Vehicle Does Not Creep Forward In “D”, “2” Or
“1” Position ........................................................... 316
8. Vehicle Cannot Be Started From D
1 ................. 317
9. A/T Does Not Shift: D
1→ D2 Or Does Not Kick
down: D
4→ D2 ..................................................... 320
10. A/T Does Not Shift: D
2→ D3 ......................... 322
11. A/T Does Not Shift: D
3→ D4 .......................... 324
12. A/T Does Not Perform Lock-up ...................... 326
13. A/T Does Not Hold Lock-up Condition ........... 326
14. Lock-up Is Not Released ................................ 328
15. Engine Speed Does Not Return To Idle (Light
Braking D
4→ D3 ) ................................................ 328
16. Vehicle Does Not Start From D
1 ..................... 330
17. A/T Does Not Shift: D
4→ D3 , When Overdrive
Control Switch “ON” → “OFF” .............................. 330
18. A/T Does Not Shift: D
3→ 22 , When Selector
Lever “D” → “2” Position ...................................... 331
19. A/T Does Not Shift: 2
2→ 11 , When Selector
Lever “2” → “1” Position ....................................... 332
20. Vehicle Does Not Decelerate By Engine Brake . 333
21. TCM Self-diagnosis Does Not Activate (PNP &
Overdrive Control Switches, and Throttle Position
Sensor Circuit Checks) ........................................ 333
ALL
MAIN POWER SUPPLY AND GROUND CIRCUIT . 340
Wiring Diagram — AT — MAIN ............................ 340
Diagnostic Procedure ........................................... 341
VEHICLE SPEED SENSOR - A/T (REVOLUTION
SENSOR) ................................................................ 343
Description ........................................................... 343
Wiring Diagram — AT — VSSAT ......................... 345
Diagnostic Procedure ........................................... 346
DTC VEHICLE SPEED SENSOR MTR .................. 348
Description ........................................................... 348
Wiring Diagram — AT — VSSMTR ...................... 350
Diagnostic Procedure ........................................... 351
ACCELE RATOR PEDAL POSITION (APP) SEN-
SOR ........................................................................ 352
Description ........................................................... 352Wiring Diagram — AT — TPS ..............................354
Diagnostic Procedure ...........................................355
SHIFT SOLENOID VALVE A ..................................357
Description ............................................................357
Wiring Diagram — AT — SSV/A ...........................359
Diagnostic Procedure ...........................................360
Component Inspection ..........................................360
SHIFT SOLENOID VALVE B ..................................362
Description ............................................................362
Wiring Diagram — AT — SSV/B ...........................364
Diagnostic Procedure ...........................................365
Component Inspection ..........................................365
OVERRUN CLUTCH SOLENOID VALVE ...............367
Description ............................................................367
Wiring Diagram — AT — OVRCSV ......................369
Diagnostic Procedure ...........................................370
Component Inspection ..........................................371
TORQUE CONVERTER CLUTCH SOLENOID
VALVE .....................................................................372
Description ............................................................372
Wiring Diagram — AT — TCV ..............................374
Diagnostic Procedure ...........................................375
Component Inspection ..........................................375
BATT/FLUID TEMP SEN (A/T FLUID TEMP SEN-
SOR CIRCUIT AND TCM POWER SOURCE) .......377
Description ............................................................377
Wiring Diagram — AT — BA/FTS .........................379
Diagnostic Procedure ...........................................380
Component Inspection ..........................................382
ENGINE SPEED SIGNAL .......................................383
Description ............................................................383
Wiring Diagram — AT — ENGSS .........................385
Diagnostic Procedure ...........................................386
LINE PRESSURE SOLENOID VALVE ...................388
Description ............................................................388
Wiring Diagram — AT — LPSV ............................390
Diagnostic Procedure ...........................................391
Component Inspection ..........................................393
CAN COMMUNICATION LINE ...............................395
Description ............................................................395
On Board Diagnosis Logic ....................................395
Self-Diagnosis Code Confirmation Procedure ......395
Wiring Diagram — AT — CAN ..............................396
Diagnostic Procedure ...........................................397
A/T SHIFT LOCK SYSTEM ....................................398
Description ............................................................398
Shift Lock System Electrical Parts Location .........398
Wiring Diagram — SHIFT — ................................399
Diagnostic Procedure ...........................................400
KEY INTERLOCK CABLE ......................................404
Components .........................................................404
Removal ...............................................................404
Installation ............................................................405
ON-VEHICLE SERVICE ..........................................406
Control Valve Assembly and Accumulators ..........406
Control Cable Adjustment .....................................408
Park/Neutral Position (PNP) Switch Adjustment ..408
Differential Side Oil Seal Replacement ................409
Revolution Sensor Replacement ..........................409

AT-4
REMOVAL AND INSTALLATION ...........................410
Removal ...............................................................410
Installation .............................................................411
OVERHAUL .............................................................413
Output Shaft, Idler Gear, Reduction Pinion Gear and
Bearing Retainer ...................................................413
Oil Channel ...........................................................416
Locations of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings ..........................417
DISASSEMBLY .......................................................418
Disassembly .........................................................418
REPAIR FOR COMPONENT PARTS ......................432
Manual Shaft ........................................................432
Oil Pump ...............................................................435
Control Valve Assembly ........................................439
Control Valve Upper Body ....................................449
Control Valve Lower Body ....................................453
Reverse Clutch .....................................................455
High Clutch ...........................................................459
Forward and Overrun Clutches ............................464
Low & Reverse Brake ...........................................470
Rear Internal Gear, Forward Clutch Hub and Over-
run Clutch Hub ......................................................474
Output Shaft, Idler Gear, Reduction Pinion Gear and
Bearing Retainer ...................................................478
Band Servo Piston Assembly ...............................483
Final Drive ............................................................488
ASSEMBLY .............................................................493
Assembly (1) .........................................................493Adjustment (1) .......................................................494
Assembly (2) .........................................................500
Adjustment (2) .......................................................504
Assembly (3) .........................................................508
SERVICE DATA AND SPECIFICATIONS (SDS) ....515
General Specifications ......................................... .515
Shift Schedule .......................................................515
Stall Revolution .....................................................515
Line Pressure ........................................................515
Control Valves .......................................................516
Clutch and Brakes .................................................516
Clutch and Brake Return Springs .........................518
Oil Pump ......................................................
.........518
Input Shaft .............................................................518
Planetary carrier ....................................................518
Final Drive .............................................................519
Reduction Pinion Gear ..........................................520
Output Shaft ..........................................................522
Bearing Retainer ...................................................523
Total End Play .......................................................523
Reverse Clutch End Play ......................................523
Accumulator ..........................................................523
Band Servo ...........................................................524
Removal and Installation .......................................524
Shift Solenoid Valves ............................................524
Solenoid Valves ....................................................524
A/T Fluid Temperature Sensor ..............................524
Revolution Sensor .................................................524
Dropping Resistor .................................................524

PRECAUTIONS
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●After performing each TROUBLE DIAGNOSIS, perform
“DTC (Diagnostic Trouble Code) CONFIRMATION PROCE-
DURE”.
The DTC should not be displayed in the “DTC CONFIRMA-
TION PROCEDURE” if the repair is completed.
●Before proceeding with disassembly, thoroughly clean the out-
side of the transaxle. It is important to prevent the internal parts
from becoming contaminated by dirt or other foreign matter.
●Disassembly should be done in a clean work area.
●Use lint-free cloth or towels for wiping parts clean. Common
shop rags can leave fibers that could interfere with the operation
of the transaxle.
●Place disassembled parts in order for easier and proper assembly.
●All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.
●Gaskets, seals and O-rings should be replaced any time the transaxle is disassembled.
●It is very important to perform functional tests whenever they are indicated.
●The valve body contains precision parts and requires extreme care when parts are removed and serviced.
Place disassembled valve body parts in order for easier and proper assembly. Care will also prevent
springs and small parts from becoming scattered or lost.
●Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.
●Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings
and seals, or hold bearings and washers in place during assembly. Do not use grease.
●Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
●After overhaul, refill the transaxle with new ATF.
●When the A/T drain plug is removed, only some of the fluid is drained. Old A/T fluid will remain in torque
converter and ATF cooling system.
Always follow the procedures under AT-13, "
Changing A/T Fluid" when changing A/T fluid.
Service Notice or PrecautionsECS007N8
FA I L - S A F E
The TCM has an electronic Fail-Safe (limp home mode). This allows the vehicle to be driven even if a major
electrical input/output device circuit is damaged.
Under Fail-Safe, the vehicle always runs in third gear, even with a shift lever position of “1”, “2” or “D”. The cus-
tomer may complain of sluggish or poor acceleration.
When the ignition key is turned “ON” following Fail-Safe operation, O/D OFF indicator lamp blinks for about 8
seconds. Refer to AT- 2 5 0 , "
Diagnostic Procedure Without CONSULT-II" (EXCEPT FOR EURO-OBD) or AT-
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.
Always follow the “Work Flow”, refer to AT- 2 5 9
(EXCEPT FOR EURO-OBD) or AT- 6 0 (EURO-OBD).
The SELF-DIAGNOSIS results will be as follows:
●The first SELF-DIAGNOSIS will indicate damage to the vehicle speed sensor or the revolution sensor.
●During the next SELF-DIAGNOSIS, performed after checking the sensor, no damages will be indicated.
TORQUE CONVERTER SERVICE
The torque converter should be replaced under any of the following conditions:
●External leaks in the hub weld area.
●Converter hub is scored or damaged.
●Converter pilot is broken, damaged or fits poorly into crankshaft.
●Steel particles are found after flushing the cooler and cooler lines.
●Pump is damaged or steel particles are found in the converter.
●Vehicle has TCC shudder and/or no TCC apply. Replace only after all hydraulic and electrical diagnoses
have been made. (Converter clutch material may be glazed.)
●Converter is contaminated with engine coolant containing antifreeze.
SAT652J

AT-8
PRECAUTIONS
●Internal failure of stator roller clutch.
●Heavy clutch debris due to overheating (blue converter).
●Steel particles or clutch lining material found in fluid filter or on magnet when no internal parts in unit are
worn or damaged — indicates that lining material came from converter.
The torque converter should not be replaced if:
●The fluid has an odor, is discolored, and there is no evidence of metal or clutch facing particles.
●The threads in one or more of the converter bolt holes are damaged.
●Transaxle failure did not display evidence of damaged or worn internal parts, steel particles or clutch plate
lining material in unit and inside the fluid filter.
●Vehicle has been exposed to high mileage (only). The exception may be where the torque converter
clutch dampener plate lining has seen excess wear by vehicles operated in heavy and/or constant traffic,
such as taxi, delivery or police use.
EURO-OBD 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- 4 2 , "
SELF-DIAGNOSTIC RESULT TEST MODE" for the indicator used to display each self-diagnostic
result.
●The self-diagnostic results indicated by the MI are automatically stored in both the ECM and TCM memo-
ries.
Always perform the procedure AT- 3 9 , "
HOW TO ERASE DTC" to complete the repair and avoid
unnecessary blinking of the MI.
●The following self-diagnostic items can be detected using ECM self-diagnostic results mode* only when
the 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" .
●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".
Wiring Diagrams and Trouble DiagnosisECS007N9
When you read wiring diagrams, refer to the following:
●GI-12, "How to Read Wiring Diagrams".
●EL-11, "POWER SUPPLY ROUTING".
When you perform trouble diagnosis, refer to the following:
●GI-22, "How to Perform Efficient Diagnosis for an Electrical Incident".
●GI-32, "How to Follow Trouble Diagnosis".

A/T FLUID
AT-13
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A/T FLUIDPFP:KLE40
Checking A/T FluidECS007NC
1. Warm up engine.
2. Check for fluid leakage.
3. 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 posi-
tion. 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
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.
●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.
●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, "Radi-
ator".
Changing A/T FluidECS007ND
1. Warm up A/T fluid.
2. Stop engine.
3. Drain A/T fluid from drain plug and refill with new A/T fluid.
Always refill same volume with drained fluid.
4. Run engine at idle speed for five minutes.
5. Check fluid level and condition. Refer to AT- 1 3 , "
Checking A/T Fluid" . If fluid is still dirty, repeat steps 2
through 5.
SMA827CA
SMA853B
Fluid grade:
Genuine Nissan ATF or equivalent. Refer to MA-
19, "RECOMMENDED FLUID AND LUBRI-
CANTS".
Fluid capacity (With torque converter):
Approx. 7.7 (6-3/4 lmp qt)
Drain plug:
: 29 - 39 N·m (3.0 - 4.0 kg-m, 22 - 29 ft-lb)
SMA027D

OVERALL SYSTEM
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Control SystemECS007NJ
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.
*: This sensor means Accelerator pedal position (APP) sensor.
CONTROL SYSTEM
SWITCHES & SENSORS TCM ACTUATORS
PNP switch
Throttle position sensor*
Engine speed signal
A/T fluid temperature sensor
Revolution sensor
Vehicle speed sensor
Overdrive control switch
Stop lamp switchShift control
Line pressure control
Lock-up control
Overrun clutch control
Timing control
Fail-safe control
Self-diagnosis
CONSULT-II communication line
controlShift 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
SCIA0690E

AT-28
OVERALL SYSTEM
TCM FUNCTION
The function of the TCM is to:
●Receive input signals sent from various switches and sensors.
●Determine required line pressure, shifting point, lock-up operation, and engine brake operation.
●Send required output signals to the respective solenoid valves.
INPUT/OUTPUT SIGNAL OF TCM
Control MechanismECS007NK
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.
Sensors, switches and solenoid
valvesFunction
InputPNP switch Detects select lever position and sends a signal to TCM.
Throttle position sensor (accelerator
pedal position (APP) sensor)Detects throttle valve position and sends a signal to TCM.
Engine speed signal From ECM.
A/T fluid temperature sensor Detects transmission fluid temperature and sends a signal to TCM.
Revolution sensor Detects output shaft rpm and sends a signal to TCM.
Vehicle speed sensorUsed as an auxiliary vehicle speed sensor. Sends a signal when revolution
sensor (installed on transmission) malfunctions.
Overdrive control switchSends a signal, which prohibits a shift to “D
4 ” (overdrive) position, to the
TCM.
Stop lamp switch Releases lock-up system when depressing pedal in lock-up condition.
OutputShift solenoid valve A/BSelects shifting point suited to driving conditions in relation to a signal sent
from TCM.
Line pressure solenoid valveRegulates (or decreases) line pressure suited to driving conditions in relation
to a signal sent from TCM.
Torque converter clutch solenoid
valveRegulates (or decreases) lock-up pressure suited to driving conditions in rela-
tion to a signal sent from TCM.
Overrun clutch solenoid valveControls an “engine brake” effect suited to driving conditions in relation to a
signal sent from TCM.
O/D OFF indicator lamp Shows TCM faults when A/T control components malfunction.
SAT003J