transmission fluid NISSAN LATIO 2011 Service Repair Manual

AT-1
TRANSMISSION/TRANSAXLE
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CONTENTS
AUTOMATIC TRANSAXLE
SERVICE INFORMATION .. ..........................5
INDEX FOR DTC ............................................ .....5
Alphabetical Index ............................................... ......5
DTC No. Index ..........................................................5
PRECAUTIONS ...................................................7
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
7
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
7
Precaution for On Board Diagnosis (OBD) System
of A/T and Engine .....................................................
8
Precaution .................................................................8
Service Notice or Precaution .....................................9
PREPARATION ..................................................11
Special Service Tool ........................................... ....11
Commercial Service Tool ........................................14
A/T FLUID ...........................................................17
Checking A/T Fluid ..................................................17
Changing A/T Fluid .................................................17
A/T Fluid Cooler Cleaning .......................................18
A/T CONTROL SYSTEM ....................................21
Cross-Sectional View ..............................................21
Shift Mechanism .................................................. ....22
TCM Function ..........................................................30
CAN Communication ...............................................31
Input/Output Signal of TCM .....................................31
Line Pressure Control .............................................32
Shift Control ........................................................ ....33
Lock-up Control .......................................................34
Engine Brake Control (Overrun Clutch Control) ......35
Control Valve ....................................................... ....37
Centrifugal Cancel Mechanism ...............................37
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......39
Introduction ......................................................... ....39
OBD-II Function for A/T System ..............................39
One or Two Trip Detection Logic of OBD-II ......... ....39
OBD-II Diagnostic Trouble Code (DTC) ..................39
Malfunction Indicator Lamp (MIL) ............................41
TROUBLE DIAGNOSIS ....................................42
DTC Inspection Priority Chart ..................................42
Fail-Safe ..................................................................42
How to Perform Trouble Diagnosis for Quick and
Accurate Repair .......................................................
43
A/T Electrical Parts Location ...................................49
Circuit Diagram ........................................................50
Inspections Before Trouble Diagnosis .....................51
Road Test ................................................................55
Check Before Engine Is Started ..............................56
Check at Idle ............................................................56
Cruise Test - Part 1 .................................................58
Cruise Test - Part 2 .................................................61
Cruise Test - Part 3 .................................................62
Vehicle Speed at Which Gear Shifting Occurs ........64
Vehicle Speed at Which Lock-up Occurs/Releas-
es .............................................................................
64
Symptom Chart ........................................................65
TCM Terminal and Reference Value .......................75
CONSULT-III Function (TRANSMISSION) .......... ....77
Diagnosis Procedure without CONSULT-III ............82
U1000 CAN COMM CIRCUIT ...........................87
Description ........................................................... ....87
On Board Diagnosis Logic .......................................87
Possible Cause ........................................................87
DTC Confirmation Procedure ..................................87
Wiring Diagram - AT - CAN .....................................88
Diagnosis Procedure ...............................................89
P0705 TRANSMISSION RANGE SWITCH A ...90
Description ...............................................................90
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ....
90
On Board Diagnosis Logic .......................................90
Possible Cause ........................................................90
DTC Confirmation Procedure ..................................90
Revision: May 2010 2011 Versa

AT-2
Wiring Diagram - AT - TR/SW ................................91
Diagnosis Procedure ..............................................92
Component Inspection ............................................94
P0710 TRANSMISSION FLUID TEMPERA-
TURE SENSOR A ..............................................
95
Description ........................................................... ...95
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ...
95
On Board Diagnosis Logic ......................................95
Possible Cause .......................................................95
DTC Confirmation Procedure .................................95
Wiring Diagram - AT - FTS .....................................96
Diagnosis Procedure ..............................................96
Component Inspection ............................................99
P0720 OUTPUT SPEED SENSOR ..................100
Description ........................................................... ..100
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
100
On Board Diagnosis Logic .....................................100
Possible Cause ......................................................100
DTC Confirmation Procedure ................................100
Wiring Diagram - AT - VSSA/T ..............................101
Diagnosis Procedure ........................................... ..102
P0725 ENGINE SPEED ...................................105
Description ........................................................... ..105
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
105
On Board Diagnosis Logic .....................................105
Possible Cause ......................................................105
DTC Confirmation Procedure ................................105
Wiring Diagram - AT - ENGSS ..............................106
Diagnosis Procedure .............................................107
P0731 1GR INCORRECT RATIO ....................109
Description ........................................................... ..109
On Board Diagnosis Logic .....................................109
Possible Cause ......................................................109
DTC Confirmation Procedure ................................109
Diagnosis Procedure .............................................110
P0732 2GR INCORRECT RATIO ....................112
Description ........................................................... ..112
On Board Diagnosis Logic .....................................112
Possible Cause ......................................................112
DTC Confirmation Procedure ................................112
Diagnosis Procedure .............................................113
P0733 3GR INCORRECT RATIO ....................115
Description ........................................................... ..115
On Board Diagnosis Logic .....................................115
Possible Cause ......................................................115
DTC Confirmation Procedure ................................115
Diagnosis Procedure .............................................116
P0734 4GR INCORRECT RATIO ....................118
Description ........................................................... ..118
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
118
On Board Diagnosis Logic ....................................118
Possible Cause .....................................................118
DTC Confirmation Procedure ................................118
Diagnosis Procedure .............................................119
P0740 TORQUE CONVERTER ........................123
Description ........................................................... .123
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
123
On Board Diagnosis Logic ....................................123
Possible Cause .....................................................123
DTC Confirmation Procedure ................................123
Wiring Diagram - AT - TCV ...................................124
Diagnosis Procedure .............................................125
Component Inspection ..........................................126
P0744 TORQUE CONVERTER ........................128
Description ........................................................... .128
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
128
On Board Diagnosis Logic ....................................128
Possible Cause .....................................................128
DTC Confirmation Procedure ................................128
Diagnosis Procedure .............................................129
P0745 PRESSURE CONTROL SOLENOID A ..133
Description ........................................................... .133
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
133
On Board Diagnosis Logic ....................................133
Possible Cause .....................................................133
DTC Confirmation Procedure ................................133
Wiring Diagram - AT - LPSV .................................134
Diagnosis Procedure .............................................135
Component Inspection ..........................................137
P0750 SHIFT SOLENOID A .............................138
Description ............................................................138
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
138
On Board Diagnosis Logic ....................................138
Possible Cause .....................................................138
DTC Confirmation Procedure ................................138
Wiring Diagram - AT - SSV/A ................................139
Diagnosis Procedure ............................................ .140
Component Inspection ..........................................141
P0755 SHIFT SOLENOID B .............................143
Description ............................................................143
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... .
143
On Board Diagnosis Logic ....................................143
Possible Cause .....................................................143
DTC Confirmation Procedure ................................143
Wiring Diagram - AT - SSV/B ................................144
Diagnosis Procedure ............................................ .145
Component Inspection ..........................................146
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AT-3
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P1760 OVERRUN CLUTCH
SOLENOID .........148
Description .......................................................... ..148
CONSULT-III Reference Value in Data Monitor
Mode ................................................................... ..
148
On Board Diagnosis Logic ....................................148
Possible Cause .....................................................148
DTC Confirmation Procedure ................................148
Wiring Diagram - AT - OVRCSV ...........................149
Diagnosis Procedure .............................................150
Component Inspection ..........................................151
VEHICLE SPEED SIGNAL ...............................153
Description .......................................................... ..153
CONSULT-III Reference Value in Data Monitor
Mode ................................................................... ..
153
On Board Diagnosis Logic ....................................153
Possible Cause .....................................................153
DTC Confirmation Procedure ................................153
Wiring Diagram - AT - VSSMTR ...........................154
Diagnosis Procedure ........................................... ..155
BATT/FLUID TEMP SEN .................................156
Description .......................................................... ..156
CONSULT-III Reference Value in Data Monitor
Mode ................................................................... ..
156
On Board Diagnosis Logic ....................................156
Possible Cause .....................................................156
DTC Confirmation Procedure ................................156
Wiring Diagram - AT - BA/FTS ..............................157
Diagnosis Procedure .............................................158
Component Inspection ..........................................160
INPUT SPEED SENSOR A ..............................162
Description .......................................................... ..162
CONSULT-III Reference Value in Data Monitor
Mode ................................................................... ..
162
On Board Diagnosis Logic ....................................162
Possible Cause .....................................................162
DTC Confirmation Procedure ................................162
Wiring Diagram - AT - PT/SEN .............................163
Diagnosis Procedure .............................................164
CONTROL UNIT (RAM), CONTROL UNIT
(ROM) ...............................................................
167
Description .......................................................... ..167
On Board Diagnosis Logic ....................................167
Possible Cause .....................................................167
DTC Confirmation Procedure ................................167
Diagnosis Procedure .............................................167
MAIN POWER SUPPLY AND GROUND CIR-
CUIT ..................................................................
168
Wiring Diagram - AT - MAIN ............................... ..168
Diagnosis Procedure .............................................169
TR SW, OD SW AND CLOSED THROTTLE,
WIDE OPEN THROTTLE POSITION SIGNAL
CIRCUIT ......................................................... ..
171
CONSULT-III Reference Value in Data Monitor
Mode ................................................................... ..
171
TCM Terminal and Reference Value .....................171
Diagnosis Procedure ........................................... ..171
Component Inspection ...........................................175
SHIFT POSITION INDICATOR CIRCUIT ........176
Description .............................................................176
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
176
Diagnosis Procedure .............................................176
TROUBLE DIAGNOSIS FOR SYMPTOMS ....177
Wiring Diagram - AT - NONDTC ...........................177
OD OFF Indicator Lamp Does Not Come On ........180
Engine Cannot Be Started in "P" and "N" Position ..182
In "P" Position, Vehicle Moves Forward or Back-
ward When Pushed ...............................................
183
In "N" Position, Vehicle Moves ..............................183
Large Shock "N" → "R" Position .......................... ..184
Vehicle Does Not Creep Backward in "R" Position ..185
Vehicle Does Not Creep Forward in "D", "2" or "1"
Position ................................................................ ..
186
Vehicle Cannot Be Started from D1 .......................187
A/T Does Not Shift: D1→ D2or Does Not Kick-
down: D
4→ D2 ..................................................... ..189
A/T Does Not Shift: D2→ D3 ................................ ..190
A/T Does Not Shift: D3→ D4 ................................ ..192
A/T Does Not Perform Lock-up ........................... ..193
A/T Does Not Hold Lock-up Condition ...................194
Lock-up Is Not Released .......................................195
Engine Speed Does Not Return to Idle (Light
Braking D
4→ D3) ................................................. ..196
A/T Does Not Shift: D4→ D3, When OD OFF ...... ..197
A/T Does Not Shift: D3→ 22, When Selector Lever
"D" → "2" Position ............................................... ..
198
A/T Does Not Shift: 22→ 11, When Selector Lever
"2" → "1" Position ................................................ ..
199
Vehicle Does Not Decelerate by Engine Brake ... ..201
TCM Self-Diagnosis Does Not Activate .................204
A/T SHIFT LOCK SYSTEM .............................206
Description .............................................................206
Shift Lock System Parts Location ..........................207
Wiring Diagram - AT - SHIFT ................................208
Diagnosis Procedure .............................................208
TRANSMISSION CONTROL MODULE ..........212
Removal and Installation .......................................212
SHIFT CONTROL SYSTEM ............................213
A/T Shift Selector Removal and Installation ........ ..213
A/T Shift Selector Disassembly and Assembly ......216
Shift Selector Handle Removal and Installation ....216
Adjustment of A/T Position ....................................217
Checking of A/T Position .......................................217
KEY INTERLOCK CABLE ..............................219
Removal and Installation .......................................219
ON-VEHICLE SERVICE ..................................222
Control Valve Assembly and Accumulators ...........222
Revision: May 2010 2011 Versa

AT-4
Transmission Range Switch ..................................225
Output Speed Sensor ............................................227
Input Speed Sensor ...............................................228
Differential Side Oil Seal ........................................229
AIR BREATHER HOSE ...................................232
Removal and Installation ..................................... ..232
TRANSAXLE ASSEMBLY ..............................233
Removal and Installation ..................................... ..233
OVERHAUL .................................................... .237
Component .......................................................... ..237
Oil Channel ............................................................250
Location of Adjusting Shims, Needle Bearings and
Thrust Washers .....................................................
253
Location of Snap Rings .........................................255
DISASSEMBLY .............................................. .257
Disassembly ........................................................ ..257
REPAIR FOR COMPONENT PARTS ..............275
Manual Shaft ....................................................... ..275
Oil Pump ................................................................278
Control Valve Assembly ........................................281
Control Valve Upper Body .....................................290
Control Valve Lower Body ................................... ..294
Reverse Clutch ......................................................297
High Clutch ............................................................302
Forward and Overrun Clutches .............................307
Low & Reverse Brake ............................................314
Rear Internal Gear and Forward Clutch Hub .........318
Output Shaft, Output Gear, Idler Gear, Reduction
Pinion Gear and Bearing Retainer .........................
322
Band Servo Piston Assembly ................................331
Final Drive .............................................................337
ASSEMBLY .....................................................344
Assembly (1) ........................................................ ..344
Adjustment (1) (For HR16DE Engine Models) ..... .345
Adjustment (1) (For MR18DE Engine Models) .....349
Assembly (2) .........................................................355
Adjustment (2) .......................................................360
Assembly (3) .........................................................363
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................
373
General Specification ........................................... .373
Vehicle Speed at Which Gear Shifting Occurs .....373
Vehicle Speed at When Lock-up Occurs/Releases
.
373
Stall Speed ............................................................374
Line Pressure ........................................................374
Adjusting shims, Needle Bearings, Thrust Wash-
ers and Snap Rings ..............................................
374
Control Valves .......................................................375
Accumulator ..........................................................376
Clutches and Brakes .............................................376
Final Drive .............................................................378
Planetary Carrier ...................................................378
Oil Pump ...............................................................378
Input Shaft .............................................................378
Reduction Pinion Gear ..........................................378
Band Servo ...........................................................378
Output Shaft ..........................................................379
Bearing Retainer ...................................................379
Total End Play ...................................................... .379
Reverse Clutch End Play ......................................379
Removal and Installation .......................................379
Shift Solenoid Valves ........................................... .379
Solenoid Valves ....................................................380
A/T Fluid Temperature Sensor ..............................380
Output Speed Sensor ...........................................380
Dropping Resistor .................................................380
Input Speed Sensor ..............................................380
Revision: May 2010 2011 Versa

PRECAUTIONSAT-9
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• Gaskets, seals and O-rings should be replaced any time the A/T is disassembled.
• It is very important to perform func tional 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 pl ace during assembly. Do not use grease.
• Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
• Clean or replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer. Refer to AT-
18, "A/T Fluid Cooler Cleaning".
• After overhaul, refill the A/T 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 con- verter and ATF cooling system.
Always follow the procedures under “Changing A/T Fluid” in the AT section when changing A/T fluid. Refer to
AT-17, "
Changing A/T Fluid", AT-17, "Checking A/T Fluid".
Service Notice or PrecautionINFOID:0000000005928067
ATF COOLER SERVICE
If A/T fluid contains frictional material (clutches, bands, etc.), or if an A/T is repaired, overhauled, or replaced,
inspect and clean the A/T oil cooler mounted in the radiator or replace the radiator. Flush cooler lines using
cleaning solvent and compressed air after repair. Check Service Bulletins for latest A/T oil cooler cleaning pro-
cedure. For radiator replacement, refer to CO-16, "
Removal and Installation" (HR16DE engine models), CO-
40, "Removal and Installation" (MR18DE engine models).
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 engi ne coolant containing antifreeze.
• Internal malfunction of stator roller clutch.
• Heavy clutch debris due to overheating (blue converter).
• Steel particles or clutch lining material found in flui d 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.
• A/T malfunction did not display evidence of damaged or worn internal parts, steel particles or clutch plate lin-
ing material in unit and inside the fluid filter.
• Vehicle has been exposed to high mileage (only). The e xception 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.
OBD-II SELF-DIAGNOSIS
• 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 OD OFF indicator lamp or the malfunction indicator lamp (MIL). Refer to the table
on AT-82, "
Diagnosis Procedure without CONSULT-III" for the indicator used to display each self-diagnostic
result.
• The self-diagnostic results indicated by the MIL are automatically stored in both the ECM and TCM memo- ries.
Always perform the procedure “HOW TO ERASE DTC” on AT-39, "
OBD-II Diagnostic Trouble Code
(DTC)" to complete the repair and avoid unnecessary blinking of the MIL.
• The following self-diagnostic items can be detected us ing ECM self-diagnostic results mode* only when the
OD OFF indicator lamp does not indicate any malfunctions.
- Transmission range switch
- A/T 1GR, 2GR, 3GR, or 4GR function
Revision: May 2010 2011 Versa

AT-18
< SERVICE INFORMATION >
A/T FLUID
5. Run engine at idle speed for 5 minutes.
6. Check A/T fluid level and condition. Refer to AT-17, "
Checking A/T Fluid".
A/T Fluid Cooler CleaningINFOID:0000000005928072
Whenever the A/T is repaired, overhauled, or replaced, the A/T fluid cooler mounted in the radiator must be
inspected and cleaned.
Metal debris and friction material, if present, can becom e trapped in the A/T fluid cooler. This debris can con-
taminate the newly serviced A/T or, in severe cases, can bloc k or restrict the flow of A/T fluid. In either case,
malfunction of the newly serviced A/T may result.
Debris, if present, may build up as A/T fluid enters the c ooler inlet. It will be necessary to back flush the cooler
through the cooler outlet in order to flush out any built up debris.
A/T FLUID COOLER CLEANING PROCEDURE
1. Identify the A/T inlet and outlet fluid cooler hoses.
2. Position an oil pan under the A/T inlet and outlet fluid cooler hoses.
3. Disconnect the A/T fluid cooler inlet and outlet rubber hoses from the steel cooler tubes or bypass valve.
NOTE:
Replace the cooler hoses if rubber material from the hose
remains on the tube fitting.
4. Allow any A/T fluid that remains in the cooler hoses to drain into the oil pan.
5. Insert the extension adapter hose of a can of Transmission
Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.
CAUTION:
• Wear safety glasses and rubber gloves when spraying the Transmission Cooler Cleaner.
• Spray Transmission Cooler Cleaner only with adequate
ventilation.
• Avoid contact with eyes and skin.
• Do not breathe vapors or spray mist.
6. Hold the hose and can as high as possible and spray Transmis- sion Cooler Cleaner in a continuous stream into the cooler outlet
hose until A/T fluid flows out of t he cooler inlet hose for 5 seconds.
7. Insert the tip of an air gun into the end of the cooler outlet hose.
8. Wrap a shop rag around the air gun tip and end of cooler outlet hose.
9. Blow compressed air regulated to 5 - 9 kg/cm
2 (490 - 883 kPa, 71 - 128 psi) through the cooler outlet hose
for 10 seconds to force out any remaining A/T fluid.
10. Repeat steps 5 through 9 three additional times.
11. Position an oil pan under the banjo bolts that connec t the A/T fluid cooler steel lines to the A/T.
12. Remove the banjo bolts. Fluid grade and capacity: Refer to
MA-14
.
SCIA5628E
SCIA5629E
SCIA5630E
Revision: May 2010 2011 Versa

A/T FLUIDAT-19
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13. Flush each steel line from the cooler side back toward the A/T by spraying Transmission Cooler Cleaner in a continuous stream for 5 seconds.
14. Blow compressed air regulated to 5 - 9 kg/cm
2 (490 - 883 kPa, 71 - 128 psi) through each steel line from
the cooler side back toward the A/T for 10 seconds to force out any remaining A/T fluid.
15. Ensure all debris is removed from the steel cooler lines.
16. Ensure all debris is removed from the banjo bolts and fittings.
17. Perform "A/T FLUID COOL ER DIAGNOSIS PROCEDURE".
A/T FLUID COOLER DIAGNOSIS PROCEDURE
NOTE:
Insufficient cleaning of the cooler inlet hose exte rior may lead to inaccurate debris identification.
1. Position an oil pan under the A/T inlet and outlet cooler hoses.
2. Clean the exterior and tip of the cooler inlet hose.
3. Insert the extension adapter hose of a can of Transmission Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.
CAUTION:
• Wear safety glasses and rubber gloves when spraying the
Transmission Cooler Cleaner.
• Spray Transmission Cooler Cleaner only with adequate
ventilation.
• Avoid contact with eyes and skin.
• Do not breathe vapors or spray mist.
4. Hold the hose and can as high as possible and spray Transmis- sion Cooler Cleaner in a continuous stream into the cooler outlet
hose until A/T fluid flows out of t he cooler inlet hose for 5 seconds.
5. Tie a common white, basket-type coffee filter to the end of the cooler inlet hose.
6. Insert the tip of an air gun into the end of the cooler outlet hose.
7. Wrap a shop rag around the air gun tip and end of cooler outlet hose.
8. Blow compressed air regulated to 5 - 9 kg/cm
2 (490 - 883 kPa,
71 - 128 psi) through the cooler outlet hose to force any remain-
ing A/T fluid into the coffee filter.
9. Remove the coffee filter from the end of the cooler inlet hose.
10. Perform "A/T FLUID COOL ER INSPECTION PROCEDURE".
A/T FLUID COOLER INSPECTION PROCEDURE
SCIA5629E
SCIA5631E
SCIA5632E
Revision: May 2010 2011 Versa

AT-30
< SERVICE INFORMATION >
A/T CONTROL SYSTEM
TCM Function
INFOID:0000000005928075
The function of the TCM is to:
• Receive input signals sent from various switches and sensors.
• Determine required line pressure, shifting poi nt, lock-up operation, and engine brake operation.
• Send required output signals to the respective solenoids.
CONTROL SYSTEM OUTLINE
The automatic transaxle senses vehicle operating conditions through various sensors or signals. It always
controls the optimum shift position and reduces shifting and lock-up shocks.
SAT381J
SWITCHES & SENSORS
⇒TCM
⇒ACTUATORS
Transmission range switch
Accelerator pedal position signal
Closed throttle position signal
Wide open throttle position signal
Engine speed signal
A/T fluid temperature sensor
Output speed sensor
Input speed sensor
Vehicle speed signal
Overdrive control switch signal
Stop lamp switch signal Shift control
Line pressure control
Lock-up control
Overrun clutch control
Fail-safe control
Self-diagnosis
CONSULT-III communication
line control
Shift solenoid valve A
Shift solenoid valve B
Overrun clutch solenoid valve
Torque converter clutch solenoid
valve
Line pressure solenoid valve
OD OFF indicator lamp
Revision: May 2010
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A/T CONTROL SYSTEMAT-31
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CONTROL SYSTEM DIAGRAM
CAN CommunicationINFOID:0000000005928076
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only. For details, refer to LAN-7,
"System Description".
Input/Output Signal of TCMINFOID:0000000005928077
JSDIA1518GB
Control itemLine
pressure control Veh icl e
speed
control Shift
control Lock-up
control Engine
brake
control Fail-safe
function Self-diag-
nostics
function
Input Accelerator pedal position signal
(*5)XXXXX(*3) XX
Output speed sensor X X X X X (*3) X X
Vehicle speed signal (*1) X (*1) X (*1) X (*1) X X
Closed throttle position signal
(*5)(*2) X (*2) X X X(*4) X
Wide open throttle position signal
(*5)(*2) X (*2) X (*4) X
Input speed sensor X XXX X
Engine speed signal XXX X
Transmission range sw itch XXXXX(*3) X(*4) X
Stop lamp switch signal
(*5)XX ( *4 ) X
A/T fluid temperature sensors
(*5)XXXX XX
Overdrive control switch signal
(*5)XXXX (*4) X
TCM power supply voltage signal X XX X
Revision: May 2010 2011 Versa

AT-34
< SERVICE INFORMATION >
A/T CONTROL SYSTEM
CONTROL OF SHIFT VALVES A AND B
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 figure above shows the operation of shift valve B. When the shift solenoid valve is “ON”, pilot pressure
applied to the end face of the shift valve overcomes spring force, moving the valve upward.
Lock-up ControlINFOID:0000000005928080
The torque converter clutch piston in the torque conver ter is locked to eliminate torque converter slip and to
increase power transmission efficiency. The solenoid va lve is controlled by an ON-OFF duty signal sent from
the TCM. The signal is converted to an oil pressure si gnal which controls the torque converter clutch piston.
CONDITIONS FOR LOCK-UP OPERATION
When vehicle is driven in 3GR and 4GR positions, v ehicle speed and throttle opening are detected. If the
detected values fall within the lock-up zone me morized in the TCM, lock-up is performed.
TORQUE CONVERTER CLUTCH SOLENOID VALVE CONTROL
Gear position123 4
Shift solenoid valve A ON (Closed)OFF (Open)OFF (Open) ON (Closed)
Shift solenoid valve B ON (Closed)ON (Closed) OFF (Open) OFF (Open)
SAT009J
OD ONOFF
Selector lever “D” position
Gear position D
4D3
Vehicle speed signal More than set value
Accelerator pedal position signal Less than set opening
Closed throttle position signal OFF
A/T fluid temperature sensor More than 40°C (104 °F)
Revision: May 2010 2011 Versa