TCM NISSAN TIIDA 2007 Service Workshop Manual

TM-3
C
E
F
G
H
I
J
K
L
MA
B
TM
N
O
P
DTC TURBINE REVOLUTION SENSOR .........104
Description ............................................................104
CONSULT-III Reference Value in Data Monitor
Mode .....................................................................
104
On Board Diagnosis Logic ....................................104
Possible Cause .....................................................104
DTC Confirmation Procedure ................................104
Diagnosis Procedure .............................................104
CONTROL UNIT (RAM), CONTROL UNIT
(ROM) ...............................................................
108
Description ............................................................108
On Board Diagnosis Logic ....................................108
Possible Cause .....................................................108
DTC Confirmation Procedure ................................108
Diagnosis Procedure .............................................108
MAIN POWER SUPPLY AND GROUND CIR-
CUIT ..................................................................
109
Description ............................................................109
On Board Diagnosis Logic ....................................109
Possible Cause .....................................................109
DTC Confirmation Procedure ................................109
Diagnosis Procedure .............................................109
PNP, OD SWITCH AND CLOSED THROT-
TLE, WIDE OPEN THROTTLE POSITION
SIGNAL CIRCUIT .............................................
111
CONSULT-III Reference Value in Data Monitor
Mode .....................................................................
111
TCM Terminal and Reference Value .....................111
Diagnosis Procedure .............................................111
Component Inspection ..........................................115
A/T SHIFT LOCK SYSTEM ..............................116
Wiring Diagram - A/T Shift Lock System - .............116
Terminals And Reference Values .........................116
Diagnosis Procedure .............................................117
ECU DIAGNOSIS .......................................119
TCM ..................................................................119
Reference Value ...................................................119
Wiring Diagram - A/T CONTROL SYSTEM - ........123
Fail-Safe ................................................................123
DTC Inspection Priority Chart ...............................125
DTC Index .............................................................125
DTC Alphabetical Index ........................................126
SYMPTOM DIAGNOSIS ............................127
SYSTEM SYMPTOM ........................................127
Symptom Chart .....................................................127
OD OFF Indicator Lamp Does Not Come On .......138
Engine Cannot Be Started in "P" and "N" Position ..140
In "P" Position, Vehicle Moves Forward or Back-
ward When Pushed ...............................................
140
In "N" Position, Vehicle Moves ..............................141
Large Shock "N" → "R" Position ...........................142
Vehicle Does Not Creep Backward in "R" Position ..142
Vehicle Does Not Creep Forward in "D", "2" or "1"
Position ..................................................................
144
Vehicle Cannot Be Started from D1 .......................145
A/T Does Not Shift: D1→ D2or Does Not Kick-
down: D
4→ D2 .......................................................146
A/T Does Not Shift: D2→ D3 ..................................148
A/T Does Not Shift: D3→ D4 ..................................149
A/T Does Not Perform Lock-up .............................151
A/T Does Not Hold Lock-up Condition ...................151
Lock-up Is Not Released .......................................152
Engine Speed Does Not Return to Idle (Light
Braking D
4→ D3) ...................................................153
A/T Does Not Shift: D4→ D3, When OD OFF ........154
A/T Does Not Shift: D3→ 22, When Selector Lever
"D" → "2" Position .................................................
155
A/T Does Not Shift: 22→ 11, When Selector Lever
"2" → "1" Position ..................................................
156
Vehicle Does Not Decelerate by Engine Brake .....158
TCM Self-Diagnosis Does Not Activate .................161
PRECAUTION ............................................163
PRECAUTIONS ...............................................163
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...............................................................
163
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
163
Precaution for On Board Diagnosis (OBD) System
of A/T and Engine (For Type1 Only) ......................
163
Precaution .............................................................164
Service Notice or Precaution .................................165
Wiring Diagram and Trouble Diagnosis .................165
PREPARATION .........................................166
PREPARATION ...............................................166
Special Service Tool ..............................................166
Commercial Service Tool ......................................169
ON-VEHICLE MAINTENANCE ..................171
A/T FLUID .......................................................171
Checking A/T Fluid ................................................171
Changing A/T Fluid ................................................171
A/T Fluid Cooler Cleaning .....................................172
STALL TEST ...................................................175
Inspection and Judgment ......................................175
LINE PRESSURE TEST ..................................178
Inspection and Judgment ......................................178
ROAD TEST ....................................................180
Description .............................................................180
Check Before Engine Is Started ............................180
Check at Idle ..........................................................181
Cruise Test - Part 1 ...............................................183
Cruise Test - Part 2 ...............................................185
Cruise Test - Part 3 ...............................................186
Vehicle Speed When Shifting Gears .....................188

TM-5
C
E
F
G
H
I
J
K
L
MA
B
TM
N
O
P Cross-Sectional View ............................................
329
Shift Mechanism ....................................................330
TCM Function ........................................................337
CAN Communication .............................................338
Input/Output Signal of TCM ...................................338
Line Pressure Control ...........................................339
Shift Control ..........................................................340
Lock-up Control .....................................................341
Engine Brake Control (Overrun Clutch Control) ....342
Control Valve .........................................................344
Centrifugal Cancel Mechanism .............................344
Component Parts Location ....................................346
A/T SHIFT LOCK SYSTEM ..............................347
System Description ...............................................347
Component Parts Location ....................................347
DIAGNOSIS SYSTEM (TCM) ...........................348
CONSULT-III Function (TRANSMISSION) ...........348
Diagnosis Procedure without CONSULT-III ..........350
COMPONENT DIAGNOSIS .......................355
VEHICLE SPEED SENSOR - A/T (REVOLU-
TION SENSOR) ................................................
355
Description ............................................................355
CONSULT-III Reference Value in Data Monitor
Mode .....................................................................
355
On Board Diagnosis Logic ....................................355
Possible Cause .....................................................355
DTC Confirmation Procedure ................................355
Diagnosis Procedure .............................................356
VEHICLE SPEED SENSOR MTR ....................359
Description ............................................................359
CONSULT-III Reference Value in Data Monitor
Mode .....................................................................
359
On Board Diagnosis Logic ....................................359
Possible Cause .....................................................359
DTC Confirmation Procedure ................................359
Diagnosis Procedure .............................................359
SHIFT SOLENOID VALVE A ...........................361
Description ............................................................361
CONSULT-III Reference Value in Data Monitor
Mode .....................................................................
361
On Board Diagnosis Logic ....................................361
Possible Cause .....................................................361
DTC Confirmation Procedure ................................361
Diagnosis Procedure .............................................361
Component Inspection ..........................................363
SHIFT SOLENOID VALVE B ...........................365
Description ............................................................365
CONSULT-III Reference Value in Data Monitor
Mode .....................................................................
365
On Board Diagnosis Logic ....................................365
Possible Cause .....................................................365
DTC Confirmation Procedure ................................365
Diagnosis Procedure .............................................365
Component Inspection ...........................................367
OVERRUN CLUTCH SOLENOID VALVE ......369
Description .............................................................369
CONSULT-III Reference Value in Data Monitor
Mode ......................................................................
369
On Board Diagnosis Logic .....................................369
Possible Cause ......................................................369
DTC Confirmation Procedure ................................369
Diagnosis Procedure .............................................369
Component Inspection ...........................................371
TORQUE CONVERTER CLUTCH SOLENOID
VALVE .............................................................
373
Description .............................................................373
CONSULT-III Reference Value in Data Monitor
Mode ......................................................................
373
On Board Diagnosis Logic .....................................373
Possible Cause ......................................................373
DTC Confirmation Procedure ................................373
Diagnosis Procedure .............................................373
Component Inspection ...........................................375
BATT/FLUID TEMP SEN (A/T FLUID TEMP
SENSOR CIRCUIT AND TCM POWER
SOURCE) ........................................................
376
Description .............................................................376
CONSULT-III Reference Value in Data Monitor
Mode ......................................................................
376
On Board Diagnosis Logic .....................................376
Possible Cause ......................................................376
DTC Confirmation Procedure ................................376
Diagnosis Procedure .............................................376
Component Inspection ...........................................379
ENGINE SPEED SIGNAL ...............................381
Description .............................................................381
CONSULT-III Reference Value in Data Monitor
Mode ......................................................................
381
On Board Diagnosis Logic .....................................381
Possible Cause ......................................................381
DTC Confirmation Procedure ................................381
Diagnosis Procedure .............................................381
TURBINE REVOLUTION SENSOR ................383
Description .............................................................383
CONSULT-III Reference Value in Data Monitor
Mode ......................................................................
383
On Board Diagnosis Logic .....................................383
Possible Cause ......................................................383
DTC Confirmation Procedure ................................383
Diagnosis Procedure .............................................383
LINE PRESSURE SOLENOID VALVE ...........387
Description .............................................................387
CONSULT-III Reference Value in Data Monitor
Mode ......................................................................
387
On Board Diagnosis Logic .....................................387
Possible Cause ......................................................387
DTC Confirmation Procedure ................................387

TM-6
Diagnosis Procedure .............................................387
Component Inspection ...........................................390
CAN COMMUNICATION LINE ........................391
Description .............................................................391
On Board Diagnosis Logic .....................................391
Possible Cause ......................................................391
DTC Confirmation Procedure ................................391
Diagnosis Procedure .............................................391
MAIN POWER SUPPLY AND GROUND CIR-
CUIT .................................................................
392
Description .............................................................392
On Board Diagnosis Logic .....................................392
Possible Cause ......................................................392
DTC Confirmation Procedure ................................392
Diagnosis Procedure .............................................392
A/T 1ST GEAR FUNCTION .............................394
Description .............................................................394
On Board Diagnosis Logic .....................................394
Possible Cause ......................................................394
DTC Confirmation Procedure ................................394
Diagnosis Procedure .............................................395
A/T 2ND GEAR FUNCTION ............................397
Description .............................................................397
On Board Diagnosis Logic .....................................397
Possible Cause ......................................................397
DTC Confirmation Procedure ................................397
Diagnosis Procedure .............................................398
A/T 3RD GEAR FUNCTION ............................400
Description .............................................................400
On Board Diagnosis Logic .....................................400
Possible Cause ......................................................400
DTC Confirmation Procedure ................................400
Diagnosis Procedure .............................................401
A/T 4TH GEAR FUNCTION .............................403
Description .............................................................403
On Board Diagnosis Logic .....................................403
Possible Cause ......................................................403
DTC Confirmation Procedure ................................403
Diagnosis Procedure .............................................404
A/T TCC S/V FUNCTION (LOCK-UP) .............408
Description .............................................................408
CONSULT-III Reference Value in Data Monitor
Mode ......................................................................
408
On Board Diagnosis Logic .....................................408
Possible Cause ......................................................408
DTC Confirmation Procedure ................................408
Diagnosis Procedure .............................................409
CONTROL UNIT (RAM), CONTROL UNIT
(ROM) ...............................................................
413
Description .............................................................413
On Board Diagnosis Logic .....................................413
Possible Cause ......................................................413
DTC Confirmation Procedure ................................413
Diagnosis Procedure .............................................413
PNP, OD SWITCH AND CLOSED THROT-
TLE, WIDE OPEN THROTTLE POSITION
SIGNAL CIRCUIT .............................................
414
CONSULT-III Reference Value in Data Monitor
Mode .....................................................................
414
TCM Terminal and Reference Value ....................414
Diagnosis Procedure .............................................414
Component Inspection ..........................................418
A/T SHIFT LOCK SYSTEM ..............................419
Wiring Diagram - A/T Shift Lock System - ............419
Terminals And Reference Values .........................419
Diagnosis Procedure .............................................420
ECU DIAGNOSIS ......................................422
TCM ..................................................................422
Reference Value ...................................................422
Wiring Diagram - A/T CONTROL SYSTEM - ........426
Fail-Safe ................................................................426
Alphabetical Index .................................................428
SYMPTOM DIAGNOSIS ...........................429
SYSTEM SYMPTOM ........................................429
Symptom Chart .....................................................429
OD OFF Indicator Lamp Does Not Come On .......440
Engine Cannot Be Started in "P" and "N" Position .442
In "P" Position, Vehicle Moves Forward or Back-
ward When Pushed ...............................................
442
In "N" Position, Vehicle Moves ..............................443
Large Shock "N" → "R" Position ...........................444
Vehicle Does Not Creep Backward in "R" Position .444
Vehicle Does Not Creep Forward in "D", "2" or "1"
Position .................................................................
446
Vehicle Cannot Be Started from D1 ......................447
A/T Does Not Shift: D1→ D2or Does Not Kick-
down: D
4→ D2 ......................................................448
A/T Does Not Shift: D2→ D3 .................................450
A/T Does Not Shift: D3→ D4 .................................451
A/T Does Not Perform Lock-up .............................452
A/T Does Not Hold Lock-up Condition ..................453
Lock-up Is Not Released .......................................454
Engine Speed Does Not Return to Idle (Light
Braking D
4→ D3) ...................................................455
A/T Does Not Shift: D4→ D3, When OD OFF .......456
A/T Does Not Shift: D3→ 22, When Selector Lever
"D" → "2" Position .................................................
456
A/T Does Not Shift: 22→ 11, When Selector Lever
"2" → "1" Position ..................................................
458
Vehicle Does Not Decelerate by Engine Brake ....460
TCM Self-Diagnosis Does Not Activate ................463
PRECAUTION ...........................................465
PRECAUTIONS ................................................465

TM-10
< BASIC INSPECTION >[TYPE 1 (4AT: RE4F03B)]
DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000001728290
INTRODUCTION
The TCM receives a signal from the vehicle speed sensor, accelera-
tor pedal position sensor (throttle position sensor) or PNP switch.
Then provides shift control or lock-up control via A/T solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used with the OBD-related parts of the
A/T system for malfunction-diagnostic purposes. The TCM is capa-
ble of diagnosing malfunctioning parts while the ECM can store mal-
functions in its memory.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good oper-
ating condition and be free of valve seizure, solenoid valve malfunc-
tion, etc.
It is much more difficult to diagnose an error that occurs intermit-
tently rather than continuously. Most intermittent errors are caused
by poor electric connections or improper wiring. In this case, careful
checking of suspected circuits may help prevent the replacement of
good parts.
A visual check only may not find the cause of the errors. A road test
with CONSULT-III (or GST) or a circuit tester connected should be
performed. Follow the “DETAILED FLOW”.
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such errors, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A “Diagnostic work sheet” as shown on
the example (Refer to TM-11
) should be used.
Start your diagnosis by looking for “conventional” errors first. This will
help troubleshoot driveability errors on an electronically controlled
engine vehicle.
Also check related Service bulletins.
DETAILED FLOW
1.COLLECT THE INFORMATION FROM THE CUSTOMER
Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred) using diagnosis worksheet. Refer to TM-11, "
Diagnostic Work Sheet".
>> GO TO 2.
2.CHECK SYMPTOM 1
Check the following items based on the information obtained from the customer.
 Fail-safe. Refer to TM-123, "
Fail-Safe".
 A/T fluid inspection. Refer to TM-171, "
Checking A/T Fluid".
 Stall test. Refer to TM-175, "
Inspection and Judgment".
 Line pressure test. Refer to TM-178, "
Inspection and Judgment".
SAT631IB
SAT632I
SEF234G

TM-12
< BASIC INSPECTION >[TYPE 1 (4AT: RE4F03B)]
DIAGNOSIS AND REPAIR WORKFLOW
DIAGNOSTIC WORK SHEET
Symptoms❏ Vehicle does not move. (❏ Any position❏ Particular position)
❏ No up-shift (❏ 1st → 2nd❏ 2nd → 3rd❏ 3rd → 4th ❏ 4th → 5th)
❏ No down-shift (❏ 5th → 4th ❏ 4th → 3rd❏ 3rd → 2nd❏ 2nd → 1st)
❏ Lock-up malfunction
❏ Shift point too high or too low.
❏ Shift shock or slip (❏ N → D❏ N → R❏ Lock-up❏ Any drive position)
❏ Noise or vibration
❏ No kick down
❏ No pattern select
❏ Others
()
Malfunction indicator lamp (MIL)❏ Continuously lit❏ Not lit
1❏ Read the item on cautions concerning fail-safe and understand the customer's com-
plaint.TM-123
2❏ A/T fluid inspection, stall test and line pressure test
❏ A/T fluid inspection
TM-171❏ Leak (Repair leak location.)
❏ State
❏ Amount
3❏ Stall test
TM-175
❏ Torque converter one-way clutch
❏ Front brake
❏ High and low reverse clutch
❏ Low coast brake
❏ Forward brake
❏ Reverse brake
❏ Forward one-way clutch❏ 1st one-way
clutch
❏ 3rd one-way
clutch
❏ Engine
❏ Line pressure low
❏ Except for input
clutch and direct
clutch, clutches and
brakes OK
❏ Line pressure test - Suspected part:TM-178
4❏ Perform self-diagnosis. — Check detected items to repair or replace malfunctioning
part.TM-35 or TM-38
5❏ Perform road test.
5-1❏ Check before engine is startedTM-180
5-2❏ Check at idleTM-181
5-3 Cruise test❏ Part 1TM-183❏ Part 2TM-185
❏ Part 3TM-186
❏ Check malfunction phenomena to repair or replace malfunctioning part after completing all road test.
Refer to TM-127
.
5❏ Drive vehicle to check that the malfunction phenomenon has been resolved.
6❏ Erase the results of the self-diagnosis from the TCM and the ECM.TM-35
or TM-38

A/T CONTROL SYSTEM
TM-21
< FUNCTION DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
C
E
F
G
H
I
J
K
L
MA
B
TM
N
O
P
TCM FunctionINFOID:0000000001694422
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 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
PNP switch
Accelerator pedal position signal
Closed throttle position signal
Wide open throttle position signal
Engine speed signal
A/T fluid temperature sensor
Revolution sensor
Turbine revolution sensor (Power
train revolution sensor)
Vehicle speed sensor
Overdrive control switch signal
Stop lamp switch signalShift control
Line pressure control
Lock-up control
Overrun clutch control
Fail-safe control
Self-diagnosis
CONSULT-III communication
line controlShift solenoid valve A
Shift solenoid valve B
Overrun clutch solenoid valve
Torque converter clutch solenoid
valve
Line pressure solenoid valve
OD OFF indicator lamp

TM-22
< FUNCTION DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
A/T CONTROL SYSTEM
CONTROL SYSTEM DIAGRAM
CAN CommunicationINFOID:0000000001694423
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-13,
"System Description".
Input/Output Signal of TCMINFOID:0000000001694424
SCIA7112E
Control itemLine
pressure
controlVehicle
speed
controlShift
controlLock-up
controlEngine
brake
controlFail-safe
functionSelf-diag-
nostics
function
InputAccelerator pedal position signal
(*5)XXXXX(*3) XX
Vehicle speed sensor·A/T
(Revolution sensor)XXXX (*3) XX
Vehicle speed sensor·MTR (*1) X (*1) X (*1) X (*1) X X
Closed throttle position signal
(*5)(*2) X (*2) X X (*4) X
Wide open throttle position signal
(*5)(*2) X (*2) X (*4) X
Turbine revolution sensor (Power
train revolution sensor)XXXXX
Engine speed signal X X
PNP switch XXXXX(*3) X(*4) X
Stop lamp switch signal
(*5)XXX(*4) X
A/T fluid temperature sensors X X X X
Overdrive control switch signal
(*5)XXX(*4) X
TCM power supply voltage signal XX

A/T CONTROL SYSTEM
TM-23
< FUNCTION DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
C
E
F
G
H
I
J
K
L
MA
B
TM
N
O
P*1: Spare for vehicle speed sensor·A/T (revolution sensor)
*2: Spare for accelerator pedal position signal
*3: If these input and output signals are different, the TCM triggers the fail-safe function.
*4: Used as a condition for starting self-diagnostics; if self-diagnosis are not started, it is judged that there is some kind of error.
*5: Input by CAN communications.
*6: Output by CAN communications.
Line Pressure ControlINFOID:0000000001694425
 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 characteristic of the line pressure to the throttle opening is set
for suitable clutch operation.
BACK-UP CONTROL (ENGINE BRAKE)
If the selector lever is shifted to “2” position while driving in D4 or D3,
great driving force is applied to the clutch inside the transaxle. Clutch
operating pressure (line pressure) must be increased to deal with
this driving force.
DURING SHIFT CHANGE
Out-
putShift solenoid valve A/B X (*3) X X
Line pressure solenoid X (*3) X X
Torque converter clutch solenoid
valveX(*3) XX
Overrun clutch solenoid valve X X (*3) X X
OD OFF indicator lamp
(*6)XX Control itemLine
pressure
controlVeh icl e
speed
controlShift
controlLock-up
controlEngine
brake
controlFail-safe
functionSelf-diag-
nostics
function
SAT003J
SAT004J

TM-24
< FUNCTION DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
A/T CONTROL SYSTEM
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.
AT LOW FLUID TEMPERATURE
 A/T fluid viscosity and frictional characteristics of the clutch facing change with A/T fluid temperature. Clutch
engaging or band-contacting pressure is compensated for, according to A/T fluid temperature, to stabilize
shifting quality.
 The line pressure is reduced below 60°C (140°F) to prevent shift-
ing shock due to high viscosity of A/T fluid when temperature is
low.
 Line pressure is increased to a maximum irrespective of the throt-
tle opening when A/T 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 A/T fluid viscosity at low temper-
ature.
Shift ControlINFOID:0000000001694426
The shift is regulated entirely by electronic control to accommodate vehicle speed and varying engine opera-
tions. This is accomplished by electrical signals transmitted by the revolution sensor and the ECM (accelerator
pedal 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 sig-
nals from the accelerator pedal position sensor and revolution sen-
sor 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.
RELATION BETWEEN SHIFT SOLENOID VALVES A AND B AND GEAR POSITIONS
SCIA4828E
SCIA4829E
SCIA4830E
SAT008J

A/T CONTROL SYSTEM
TM-25
< FUNCTION DIAGNOSIS >[TYPE 1 (4AT: RE4F03B)]
C
E
F
G
H
I
J
K
L
MA
B
TM
N
O
P
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:0000000001694427
The torque converter clutch piston in the torque converter is locked to eliminate torque converter slip and 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 3rd and 4th gear positions, 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.
TORQUE CONVERTER CLUTCH SOLENOID VALVE CONTROL
Gear position 1 2 3 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 ON OFF
Selector lever “D” position
Gear position D
4D3
Vehicle speed sensor More than set value
Throttle position sensor Less than set opening
Closed throttle position switch OFF
A/T fluid temperature sensor More than 40°C (104°F)