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2 CAMRY - OUTLINE OF NEW FEATURES
CAMRY
OUTLINE OF NEW FEATURES
The following changes have been made for the 2005 model year.
1. Exterior
_ The design of the front bumper and the radiator grille has been changed.
_ The design of the headlights, fog lights, and the fog hole covers has been changed.
_ The design of the rear combination lights has been changed.
_ Aluminum wheels with a new design have been added to the 16-inch aluminum wheels that are provided
as optional equipment on the XLE grade model.
_ New 17-inch aluminum wheels are provided as standard equipment on the SE grade models equipped with
the 3MZ-FE engine.
_ The design of the 15-inch wheel caps, which are provided on the LE grade model as standard equipment,
has been changed.
_ New exterior colors have been added as follows:
Add Color No. Add Color Name
6R6 Grayish Green Mica Metallic
8S4 Light Blue Metallic
8P4 Dark Blue Mica Metallic
2. Interior
_ The design of the front console box has been changed.
_ The center cluster and the front console of the LE and SE grade models have been painted with metallic paint.
_ The door side knobs and the automatic transaxle shift knob of the LE grade model have been chrome plated.
_ The design of the heater control panel and the door switch bases of the SE grade model has been changed.
_ The design of the steering wheel has been changed.
3. 2AZ-FE Engine
The position of the purge port on the throttle body for the California spec has been changed, and the throttle
body for the 2AZ-FE engine model has been unified to one type.
4. Automatic Transaxle
On the '05 Camry, the U241E 4-speed automatic transaxle has been changed to the U250E 5-speed automatic
transaxle.
5. Suspension
Along with the adoption of the 17-inch wheels on the MCV31L-CEASKA and MCV31L-AEASKA models,
the damping force of the front and rear shock absorbers has been optimized in order to ensure both driving
stability and ride comfort.
Along with the increased size of the wheels, the diameter of the stabilizer bar has been changed from 0.7
in. (17 mm) to 0.6 in. (15 mm) in order to realize the proper distribution of roll rigidity between the front
and rear wheels.
CAMRY - OUTLINE OF NEW FEATURES 3
6. Brake
_ A VSC (Vehicle Stability Control) system has been provided as a new option on the models equipped with
the 2AZ-FE engine. Models equipped with VSC are provided with the following functions: ABS with
EBD (Electronic Brake force Distribution), Brake Assist, and TRAC (Traction Control) system.
_ The diameter of the master cylinder has been changed from 0.87 in. (22.22 mm) to 0.93 in. (23.81 mm)
on the 1MZ-FE and 3MZ-FE engine models with VSC.
7. Rear Seat
A headrest has been added to the rear center seat.
Center Headrest
275CA28
8. Multiplex Communication
The connection for the ECM and the skid control ECU has been changed from serial communication to CAN
(Controller Area Network) on the 2AZ-FE engine model with VSC.
9. Lighting
The automatic light control system is provided as standard equipment on the models for the U.S.A.
10. Combination Meter
The design and the construction of the combination meter have been changed on all models.
11. Air Conditioning
The ECU that controls the compressor has been changed on the 2AZ-FE engine models.
12. Clean Air Filter
A pollen removal type clean air filter has been adopted on all models.
4 CAMRY - OUTLINE OF NEW FEATURES
13. Cruise Control System
_ The control of the low speed limit has been changed.
_ In terms of the low speed limit, if the vehicle speed drops below 40 km/h (25 mph) while operating in the
cruise control mode, the system stores the set speed in its memory. Therefore, if the vehicle speed drops
below 40 km/h (25 mph) while operating in the cruise control mode, the driver can press the RES/+ switch
in order to resume operating the vehicle at the speed that is stored in memory, thus effecting constant
acceleration control.
14. Seat Belt Reminder System
A buzzer sound has been added as part of the methods for reminding the front passenger.
15. Audio System
_ The audio systems listed below have been newly adopted as standard equipment on the LE grade model.
Design Specifications
_ AM/FM Tuner
_ CD Player
_ 6-speaker System
_ Manufacturer: Fujitsu TEN
275CA33
_ The steering pad switches have been made newly available as standard equipment on all models.
CAMRY - MODEL CODE & MODEL LINE-UP 5
MODEL CODE
ACV30 L - A E M N K A
1 2 3 4 5 6 7 8
BASIC MODEL CODE GEAR SHIFT TYPE
ACV30: With 2NZ-FE Engine 5 M: 5-Speed Manual
1 MVC30: With 1MZ-FE Engine A: 5-Speed Automatic
MCV31: With 3MZ-FE Engine
GRADE
STEERING WHEEL POSITION N: LE
2 6
L: Left-Hand Drive G: XLE
S: SE
MODEL NAME
3 A: Camry (Produced TMC*1) ENGINE SPECIFICATION
7
C: Camry (Produced TMMK*2) K: DOHC and SFI
BODY TYPE DESTINATION
4 8
E: 4-Door Sedan A: U.S.A. and Canada
*1 TMC : Toyota Motor Corporation
*2 TMMK : Toyota Motor Manufacturing, Kentucky, Inc.
MODEL LINE-UP
TRANSAXLE
DESTINA-
DESTINA BODY
ENGINE GRADE 5-Speed Manual 5-Speed Automatic
TION TYPE
E351 U250E U151E
ACV30L-AEANKA
LE ACV30L-AEMNKA
ACV30L-CEANKA
ACV30L-AEAGKA
2AZ-FE XLE
ACV30L-CEAGKA
ACV30L-AEASKA
U.S.A. SE ACV30L-AEMSKA
4 Door
4-Door ACV30L-CEASKA
and
Sedan MCV30L-AEANKA
Canada LE
MCV30L-CEANKA
1MZ FE
1MZ-FE
MCV30L-AEAGKA
XLE
MCV30L-CEAGKA
MCV31L-AEASKA
3MZ-FE SE
MCV31L-CEASKA
: NEW
6 CAMRY - NEW FEATURES
NEW FEATURES
fEXTERIOR
1. Front Design
z The front bumper has a three-dimensional shape that sweeps continuously outward to achieve a sporty and
wide look.
z The radiator grille of the XLE and LE grade models consists of horizontal bars in the center and the grille
frame at the top in order to achieve a simple and elegant expression.
z The radiator grille on the SE grade model has a three-dimensional composition to emphasize sportiness.
z The headlights have adopted spindle-shaped lamp graphics containing four cylinders, achieving a unique
look. The headlights on the SE grade model have been blacked out to achieve a sporty look.
z The design of the fog lights on the XLE and SE grade models has been changed. Also, the design of the
fog hole covers on the LE grade model has been changed.
275CA02 275CA03
'05 Camry '04 Camry
_ Radiator Grille A
275CA04 275CA05
LE and XLE Grade SE Grade
CAMRY - NEW FEATURES 7
_ Headlight A
Headlight Headlight
(High Beam) (Low Beam)
Side Marker
Turn Signal Light Clearance Light
275CA06 275CA07
LE and XLE Grade SE Grade
_ Fog Light and Hole Cover A
275CA08 275CA09
SE and XLE Grade LE Grade
8 CAMRY - NEW FEATURES
2. Rear Design
The taillights and stoplights have been placed in dual cylinders located in the vertical center of the rear
combination lights, in order to achieve a unique look. On the SE grade model, the headlights have been
blacked out to emphasize the dual cylinder lights, giving the vehicle a sporty look.
275CA10 275CA11
'05 Camry '04 Camry
_ Rear Combination Light A
Turn Signal Light Taillight
Taillight and
Stop Light
Buck-up Light
275CA12 275CA13
LE and XLE Grade SE Grade
CAMRY - NEW FEATURES 9
3. Tire and Disc Wheel
z Aluminum wheels with a new design have been added to the 16-inch aluminum wheels that are provided
as optional equipment on the XLE grade model.
z New 17-inch aluminum wheels are provided as standard equipment on the SE grade models equipped with
the 3MZ-FE engine.
z The design of the 15-inch wheel caps, which are provided on the LE grade model, has been changed.
Grade XLE SE LE
Tire Size 215/60R16 215/55R17 205/65R15
Disc Wheel Size 16 x 61/2 JJ 17 x 7 JJ 15 x 61/2 JJ
Disc Wheel Material Aluminum Aluminum Steel
P.C.D.* mm (in.) 114.3 (4.5)
Offset mm (in.) 50 (2)
Aluminum Wheel Aluminum Wheel Full Wheel Cap
Wheel Design
275CA14 275CA15 275CA16
*: Pitch Circle Diameter
10 CAMRY - NEW FEATURES
AINTERIOR
1. Front Console Box
_ The front console box has been changed to a type with a push-open door, thus achieving an elegant design.
_ An ash tray has been provided as optional equipment.
_ The upper end of the console has been raised 3.1 in. (80 mm) from the '04 Camry, thus increasing its
storage capacity.
A
Push Open Door
A
275CA17 275CA18
'05 Camry Standard '04 Camry
3.1 in.
(80 mm)
Top Edge of '04 Camry
Ash Tray
275CA19 275CA20
'05 Camry Option A - A Cross Section
CAMRY - NEW FEATURES 11
2. Interior Design
_ The center cluster and the front console of the LE and SE grade models have been painted with gray
metallic paint for an improved look.
_ The door side knobs and the automatic transaxle shift knob of the LE grade model have been chrome plated
to achieve an elegant look.
_ The heater control panel and the door switch bases of the SE grade model have been changed to a design
with decorative hairlines in order to achieve a sporty look.
: Painted with gray metallic
: Chrome plated
275CA21
LE Grade
: Painted with gray metallic
: Chrome plated
: Decorative hairlines
275CA22
SE Grade
12 CAMRY - NEW FEATURES
3. Steering Wheel
_ Newly designed four-spoke and three-spoke steering wheels have been adopted.
_ Along with the adoption of the four-spoke and three-spoke steering wheels, steering pad switches have
been newly adopted for ease of use.
Steering Pad Switch
275CA24 275CA25
Steering Pad Switch
Four-spoke Steering Wheel Three-spoke Steering Wheel
CAMRY - NEW FEATURES 13
zU250E AUTOMATIC TRANSAXLE
1. General
U250E automatic transaxle has been newly adopted on all the 2AZ-FE engine models. This automatic
transaxle is newly developed, compact, lightweight, and high-capacity 5-speed Super ECT (Electronically
Controlled Transaxle).
Target Fuel Accelerate
Compact Shift Quality
Developed items Economy Performance
Wide range 5 speed gear f f
High efficiency gear-train f f
Clutch pressure optimal control system f f f
New developed high-efficiency torque
f
converter
275CA52
U250E Automatic Transaxle
_ Specifications A
Model '05 Camry '04 Camry
Transaxle Type U250E U241E
1st 3.943
2nd 2.197
3rd 1.413
Gear Ratio*1
4th 0.975 1.020
5th 0. 703 --
Reverse 3.145
Differential Gear Ratio 3.391 2.740
Fluid Capacity Liters (US qts, Imp. qts) 8.0 (8.5, 7.0) 8.2 (8.7, 7.2)
Fluid Type ATF Type T-IV
Weight (Reference)*2 kg (lb) 93.0 (204.6) 89 (195.8)
*1: Counter gear ratio included
*2: Weight shows the figure with the fluid fully filled.
14 CAMRY - NEW FEATURES
Front Planetary Gear Counter Drive Gear
C1
C2 B1
C0 B2
F1
Input Shaft
Rear Planetary
Gear
B3
Differential Drive
Under Drive (U/D) Pinion
Planetary Gear
F2 C3
Counter Driven Gear 275CA53
_ Specifications A
Transaxle Type U250E U241E
C1 Forward Clutch 5
C2 Reverse Clutch 3
C3 U/D Direct Clutch 3
C0 Direct & O/D Clutch The No. of Discs 3 --
B1 2nd & O/D Brake 3
B2 1st & Reverse Brake 5
B3 U/D Brake 3
F1 No.1 One-Way Clutch 22
The No. of Sprags
No
F2 U/D One-Way Clutch 15
The No. of Sun Gear Teeth 43
Front Planetary Gear
y The No. of Pinion Gear Teeth 17
The No. of Ring Gear Teeth 77
The No. of Sun Gear Teeth 31
Rear Planetary Gear
y The No. of Pinion Gear Teeth 19
The No. of Ring Gear Teeth 69
The No. of Sun Gear Teeth 32
U/D Planetary Gear
y The No. of Pinion Gear Teeth 26
The No. of Ring Gear Teeth 83
The No. of Drive Gear Teeth 50
Counter Gear
The No. of Driven Gear Teeth 51
CAMRY - NEW FEATURES 15
2. Torque Converter
z This torque converter has been optimally designed with new fluid passages and impeller configuration
resulting in substantially enhanced transmission efficiency to achieve high starting, acceleration and fuel
economy.
z Furthermore, a hydraulically operated lock-up mechanism which cuts power transmission losses due to
slippage at medium and high speeds is used.
Pump Impeller
Lock-up Clutch
Turbine Runner
Stator
OD Input Shaft
One-way Clutch
208CH02
_ Specification A
3-Element, 1-Step, 2-Phase
Type
(with Lock-up Mechanism)
Stall Torque Ratio 1.8
3. Oil Pump
The oil pump is combined with torque converter, lubricates the planetary gear units and supplies operating
pressure to the hydraulic control.
Pump Body Drive Gear
Stator Shaft
Driven Gear
241CH85
_ Specifications A
Gear Gear Teeth
Drive Gear 9
Driven Gear 10
16 CAMRY - NEW FEATURES
4. Planetary Gear Unit
Construction
_ The gear layout of the U250E automatic transaxle is the same as that of the U241E automatic transaxle.
_ The counter drive and driven gears are placed in front of the front planetary gear and the under drive
(U/D) planetary gear unit is placed above the counter shaft. Furthermore, the force transaxle method has
been changed by eliminating the brake and the one-way clutch. As a result, a torque capacity that
accommodates the high output engine has been attained, while realizing a compact gear unit.
_ A centrifugal fluid pressure canceling mechanism has been adopted in the C0, C2, C3, and C1 clutches
that are applied when shifting from 2nd to 3rd and from 3rd to 4th. For detail, refer to Centrifugal Fluid
Pressure Canceling Mechanism on page 21.
-- Major difference between U250E automatic transaxle and U241E automatic transaxle --
_ Direct & O/D clutch (C0 ) has been adopted.
_ A centrifugal fluid pressure canceling mechanism has been adopted in the C0 clutch.
_ The operating gears for the C2 clutch and the B1 brake have been changed, and their names have been
changed to the "reverse clutch" and "2nd & O/D brake", respectively.
Counter Drive Gear
B1 F1 B2 Front Planetary Gear C1
C0 C2
Input Shaft
Rear Planetary Gear
Sun Gear Intermediate Shaft
C3
Differential Drive
Pinion
Sun Gear
F2 B3 Ring Gear
U/D Planetary Gear
Counter Driven Gear
U250E Automatic Transaxle
275CA42
Counter Drive Gear
B1 F1 B2 Front Planetary Gear C1
C2
Input Shaft
Rear Planetary Gear
Sun Gear Intermediate Shaft
C3
Differential Drive
Pinion
Sun Gear
Ring Gear
F2 B3 U/D Planetary Gear
Counter Driven Gear
U241E Automatic Transaxle 275CA43
CAMRY - NEW FEATURES 17
FUNCTION OF COMPONENT
'05 '04
Component Function Camry Camry
U250E U241E
C1 Forward Clutch Connects input shaft and front planetary sun gear. A A
Direct Clutch -- A
C2 Connects input shaft and rear planetary sun gear
gear.
Reverse Clutch A --
C3 U/D Direct Clutch Connects U/D sun gear and U/D planetary carrier. A A
C0 Direct & O/D Clutch Connects input shaft and rear planetary carrier. A --
2nd Brake Prevents rear planetary sun gear from turning either -- A
B1
2nd & O/D Brake clockwise or counterclockwise. A --
Prevents rear planetary carrier and front planetary
B2 1st & Reverse Brake ring gear from turning either clockwise or A A
counterclockwise.
Prevents U/D planetary sun gear from turning either
B3 U/D Brake A A
clockwise or counterclockwise.
Prevents rear planetary carrier and front planetary
F1 No.1 One-Way Clutch A A
ring gear from turning counterclockwise.
Prevents U/D planetary sun gear from turning
F2 U/D One-Way Clutch A A
clockwise.
These gears change the route through which driving
force is transmitted, in accordance with the operation
Planetary Gears A A
of each clutch and brake, in order to increase or
reduce the input and output speed.
18 CAMRY - NEW FEATURES
Transaxle Power Flow
Shift One-way
Solenoid Valve Clutch Brake
Lever Gear Clutch
Position S4 SR DSL SL1 SL2 SL3 C0 C1 C2 C3 B1 B2 B3 F1 F2
P Park A A A
Reve-
R A A A A A
rse
Neut-
N A A A
ral
1st A A A A A A
2nd A A A A A
D 3rd A *2 A *2 A A A A
4th A *1z *1z A A A A A
5th A A z z A A A A
1st A A A A A A
2nd A A A A A
4
3rd A *2 A *2 A A A A
4th A z z A A A A A
1st A A A A A A
3 2nd A A A A A
3rd A A A A A A
1st A A A A A A
2
2nd A A A A A
L 1st A A A A A A A A
[ A : ON D : Lock-up ON z : Flex lock-up ON (during deceleration only)]
*1: Shift control operates only when 5th is prohibited while traveling uphill / downhill.
*2: Shift control operates only when 4th is prohibited while traveling uphill / downhill.
1) 1st Gear (Except L Position)
Counter Drive Gear
B1 F1 B2 Front Planetary Gear
C1
C0 C2
Input Shaft
Rear Planetary Gear Intermediate Shaft
Sun Gear
C3
Differential Drive
Pinion
Sun Gear Ring Gear
F2 B3
U/D Planetary Gear
275CA44
CAMRY - NEW FEATURES 19
2) 2nd Gear
Counter Drive Gear
B1 F1 B2 Front Planetary Gear
C1
C0 C2
Input Shaft
Intermediate Shaft
Rear Planetary Gear Sun Gear
C3
Differential Drive
Pinion
Sun Gear Ring Gear
F2 B3
U/D Planetary Gear
275CA45
3) 3rd Gear
Counter Drive Gear
B1 F1 B2 Front Planetary Gear C1
C0 C2
Input Shaft
Intermediate Shaft
Rear Planetary Gear Sun Gear
C3
Differential Drive
Pinion
Sun Gear Ring Gear
F2 B3
U/D Planetary Gear
275CA46
4) 4th Gear
Counter Drive Gear
F1 B2
Front Planetary Gear
B1 C1
C0 C2
Input Shaft
Intermediate Shaft
Rear Planetary Gear Sun Gear
C3
Differential Drive
Pinion
Sun Gear
F2 B3 Ring Gear
U/D Planetary Gear
275CA47
20 CAMRY - NEW FEATURES
5) 5th Gear
Counter Drive Gear
B1 F1
B2 Front Planetary Gear C1
C0 C2 Input Shaft
Intermediate Shaft
Rear Planetary Gear Sun Gear
C3
Differential Drive
Pinion
Sun Gear Ring Gear
F2 B3
U/D Planetary Gear
275CA48
6) 1st Gear (L Position)
Counter Drive Gear
B1 F1 B2 Front Planetary Gear C1
C0 C2
Input Shaft
Intermediate Shaft
Rear Planetary Gear Sun Gear
C3
Differential Drive
Pinion
Sun Gear Ring Gear
F2 B3
U/D Planetary Gear
275CA49
7) Reverse Gear
Counter Drive Gear
F1 B2
Front Planetary Gear
B1 C1
C0 C2
Input Shaft
Intermediate Shaft
Rear Planetary Gear Sun Gear
C3
Differential Drive
Pinion
Sun Gear
F2 B3 Ring Gear
U/D Planetary Gear
275CA50
CAMRY - NEW FEATURES 21
Centrifugal Fluid Pressure Canceling Mechanism
There are two reasons for improving the conventional clutch mechanism:
_ To prevent the generation of pressure by the centrifugal force that applied to the fluid in piston fluid
pressure chamber (hereafter referred to as "chamber A") when the clutch is released, a check ball is
provided to discharge the fluid. Therefore, before the clutch can be subsequently applied, it took time
for the fluid to fill the chamber A.
_ During shifting, in addition to the original clutch pressure that is controlled by the valve body, the
pressure that acts on the fluid in the chamber A also exerts influence, which is dependent upon revolution
fluctuations.
To address these two needs for improvement, a canceling fluid pressure chamber (hereafter referred to as
"chamber B") has been provided opposite chamber A.
C1 Clutch
C0 Clutch
C0 Clutch C2 Clutch
Piston
Chamber A Chamber B
C3 Clutch
275CA54
By utilizing the lubrication fluid such as that of the shaft, the same amount of centrifugal force is applied,
thus canceling the centrifugal force that is applied to the piston itself. Accordingly, it is not necessary to
discharge the fluid through the use of a check ball, and a highly responsive and smooth shifting
characteristic has been achieved.
Centrifugal Fluid Pressure Clutch
Applied to the Chamber A
Target Fluid Pressure
Centrifugal Fluid Pressure
Applied to Chamber B
Chamber B
Piston Fluid (Lubrication Fluid)
Pressure
Chamber Fluid Pressure
Applied to Piston
Shaft Side
157CH17
Fluid pressure Centrifugal fluid pressure Target fluid pressure
-- =
applied to piston applied to chamber B (original clutch pressure)
22 CAMRY - NEW FEATURES
5. Valve Body Unit
General
The valve body consists of the upper and lower valve bodies and 7 solenoid valves.
Apply orifice control, which controls the flow volume to the B3 brake, has been adopted in this unit.
Solenoid Valve SL1
Solenoid Valve SLT
Solenoid Valve SL3
Upper Valve Body
Plate
Solenoid Valve SR
Solenoid Valve SL2
Lower Valve Body
Solenoid Valve S4
Solenoid Valve DSL 243CH14
_ Upper Valve Body A
Lock-up Control Valve Secondary Regulator Valve
Lock-up Relay Valve B1 Control Valve C0 Control Valve
Solenoid
Modulator Valve
B3 Orifice
Control Valve
Solenoid Relay Valve
C1 Control Valve Accumulator Control Valve
B2 Control Valve
211CH13
CAMRY - NEW FEATURES 23
_ Lower Valve Body A
B1 Apply Control Valve
B2 Apply Control Valve Primary Regulator Valve
4-5 Shift Valve Clutch Apply Control Valve
211CH14
24 CAMRY - NEW FEATURES
Solenoid Valve
1) Solenoid Valves SL1, SL2, SL3, and SLT
In order to provide a hydraulic pressure that is proportion to current that flows to the solenoid coil, the
solenoid valves SL1, SL2, SL3, and SLT linearly control the line pressure and clutch and brake
engagement pressure based on the signals received from the ECM.
The solenoid valves SL1, SL2, SL3, and SLT have the same basic structure.
Solenoid Coil
Sleeve
Hydraulic
Pressure
Spool Valve
Current
275CA51
_ Function of Solenoid Valve SL1, SL2, SL3 and SLT A
Solenoid
Action Function
Valve
SL1 B1 brake pressure control
For clutch and brake engagement pressure z C0 clutch pressure control
SL2
control z Lock-up clutch pressure control
SL3 C1 clutch pressure control
z Line pressure control
SLT For line pressure control
z Secondary pressure control
CAMRY - NEW FEATURES 25
2) Solenoid Valves SR, S4, and DSL
The solenoid valves SR, S4, and DSL use a three-way solenoid valve.
Drain
Control Pressure
Line
Pressure
Solenoid Valve ON Solenoid Valve OFF
161ES65 181CH12
The solenoid valve SR controls the solenoid relay valve. Accordingly, the fluid passages from the
solenoid valve DSL and S4 have been changed.
Solenoid Valve DSL
Solenoid Relay Valve
Line Pressure
Solenoid Valve S4
To B2
Control Valve
To Lock-up
Line Pressure Relay Valve
To Clutch Apply
Control Valve
Solenoid Valve SR
To 4-5
Shift Valve
Line Pressure ON State OFF State
241CH81
26 CAMRY - NEW FEATURES
The solenoid valve S4, when set to ON, controls the 4-5 shift valve to establish the 5th by changing over
the fluid pressure applied to B3 brake and C3 clutch.
C3 Accumulator
4-5 Shift Valve
5th: C3 Clutch ON
S4 ON
C3
Line Pressure
S4 OFF
B3
Except 5th: B3 Brake ON
ON State
OFF State
243CH20
Solenoid Valve S4 B3 Accumulator
The solenoid valve DSL controls the B2 control valve via the solenoid relay valve when the transaxle
is shifted in the R or L position.
During lock-up, the lock-up relay valve is controlled via the solenoid relay valve.
Lock-up Relay Valve
Lock-up ON Chamber
Line
Solenoid Relay Valve Pressure
Solenoid Valve DSL
(a) (b)
Lock-up OFF Chamber
Line
Pressure (b)
(a)
"R"
B2
"L"
(a) (b)
(a): ON State
(b): OFF State 241CH83
CAMRY - NEW FEATURES 27
Apply Orifice Control
This control is effected by the B3 orifice control valve. The B3 orifice control valve has been provided for
the B3 brake, which is applied when shifting from 5th to 4th. The B3 orifice control valve is controlled by
the amount of the line pressure in accordance with shifting conditions, and the flow volume of the fluid that
is supplied to the B3 brake is controlled by varying the size of the orifice in the control valve.
Line Pressure
Except 5th: B3 Brake ON
Orifice
B3
B3 Orifice
Control Valve
B3 Apply
Fluid Pressure
Orifice
B3 Accumulator
241CH84
28 CAMRY - NEW FEATURES
6. Electronic Control System
General
The electronic control systems of the U250E automatic transaxle consist of the control listed below.
System Function
z Controls the pressure that is applied directly to B1 brake, C0 and C1 clutches
Clutch Pressure by actuating 3 solenoid valves (SL1, SL2, and SL3) in accordance with
Control ECM signals.
(See page 33) z 3 solenoid valves (SL1, SL2, and SL3) minutely control the clutch pressure
in accordance with the engine output and driving conditions.
Line Pressure
Actuates the solenoid valve SLT to control the line pressure in accordance with
Optimal Control
information from the ECM and the operating conditions of the transaxle.
(See page 35)
Engine Torque Retards the engine ignition timing temporarily to improve shift feeling during
Control up or down shifting.
Shift Control in
Controls to restrict the 4th or 5th upshift or to provide appropriate engine
Uphill/Downhill
braking by the ECM to determine whether the vehicle is traveling uphill or
Traveling
downhill.
(See page 34)
The ECM sends current to 3 solenoid valves (SL1, SL2, and SL3) based on
Shift Timing Control
signals from each sensor and shifts the gear.
Lock-up Timing The ECM sends current to the solenoid valves DSL and SL2 based on signals
Control from each sensor and engages or disengages the lock-up clutch.
"N" to "D" Squat When the shift lever is shifted from "N" to "D" position, the gear is temporarily
Control shifted to 3rd and then to 1st to reduce vehicle squat.
Diagnosis When the ECM detects a malfunction, the ECM makes a diagnosis and
(See page 37) memorizes the failed section.
Even if a malfunction is detected in the sensors or solenoids, the ECM effects
Fail-safe
fail-safe control to prevent the vehicle's drivability from being affected
(See page 37)
significantly.
CAMRY - NEW FEATURES 29
Construction
The configuration of the electronic control system in the U250E automatic transaxle is as shown in the
following chart.
SENSORS ACTUATORS
SL1
NE SOLENOID VALVE SL1
CRANKSHAFT POSITION SENSOR
THW
ENGINE COOLANT TEMP. SENSOR SL2
SOLENOID VALVE SL2
VTA1,2
THROTTLE POSITION SENSOR
VC
SL3
NSW SOLENOID VALVE SL3
PARK/NEUTRAL POSITION
SWTICH R, D, 3
2, L
TRANSMISSION CONTROL SWITCH SLT
ODMS SOLENOID VALVE SLT
OVERDRIVE OFF SWITCH
S4
ECM SOLENOID VALVE S4
SPEED SENSOR
SKID CONTROL ECU DSL
SOLENOID VALVE DSL
SPD
COMBINATION METER
SR
NC SOLENOID VALVE SR
COUNTER GEAR SPEED SENSOR
NT
INPUT TURBINE SPEED SENSOR
W MALFUNCTION
INDICATOR LAMP
STP
STOP LIGHT SWITCH
THO1 SIL
FLUID TEMPERATURE SENSOR DATA LINK CONNECTOR 3
TC
246CH04
30 CAMRY - NEW FEATURES
Layout of Main Components
Combination Meter
Malfunction Indicator
Light
O/D OFF Indicator Light
ECM
Overdrive OFF Switch
Transmission Control Switch
DLC3
Counter Gear
Stop Light Switch Speed Sensor
Solenoid Valve SL1
Solenoid Valve SLT
Input Turbine Speed Sensor
Solenoid Valve SL3 Park/Neutral Position Switch
Solenoid Valve SR
Fluid Temperature Sensor
Solenoid Valve S4
Solenoid Valve DSL
Solenoid Valve SL2 275CA27
CAMRY - NEW FEATURES 31
Construction and Operation of Main Components
1) Fluid Temperature Sensor
A fluid temperature sensor is installed in the valve body for direct detection of the fluid temperature.
Fluid temperature sensor is used for revision of clutches and brakes pressure to keep smooth shift quality
every time.
Lower Valve Body
Fluid Temperature
Sensor
241CH87
2) Speed Sensors
The U250E automatic transaxle has adopted an input turbine speed sensor (for the NT signal) and a
counter gear speed sensor (for the NC signal). Thus, the ECM can detect the timing of the shifting of the
gears and appropriately control the engine torque and hydraulic pressure in response to the various
conditions.
z The input turbine speed sensor detects the input speed of the transaxle. The direct clutch (C2) drum
is used as the timing rotor for this sensor.
z The counter gear speed sensor detects the speed of the counter gear. The counter drive gear is used
as the timing rotor for this sensor.
Input Turbine Counter Gear
Speed Sensor Speed Sensor
211CH16
32 CAMRY - NEW FEATURES
Transmission Control Switch and Overdrive OFF Switch
The transmission control switch and overdrive OFF switch are installed inside shift lever assembly to detect
the shift lever position ("4th" or "D" and "2nd" or "L") and to inform ECM the shift position for the indicator
light in the combination meter.
Overdrive OFF Switch
(4th or D)
Transmission Control Switch
(2nd or L)
246CH02
CAMRY - NEW FEATURES 33
Clutch Pressure Control
1) Clutch to Clutch Pressure Control
This control has been adopted for shifting from the 2nd to 3rd gear, and from the 3rd to 4th gear.
Solenoid valves actuate SL1, SL2, and SL3 in accordance with the signals from the ECM, and guides
this output pressure directly to the control valves B1, C0, and C1 in order to regulate the line pressure that
acts on the B1 brake, C0, and C1 clutches.
As a result, compact B1, C0, and C1 accumulators without a back pressure chamber have been realized.
Sensor Signal z Input Turbine Speed Sensor
ECM z Counter Gear Speed Sensor
z Throttle Position Sensor
z Mass Air Flow Meter
SL1 SL2 SL3 z Fluid Temperature Sensor
z Engine Coolant Temp. Sensor
z
z
B1 Control C0 Control C1 Control
Valve Valve Valve f: ON : OFF
B1 C0 C1
B1 C0 C1
2nd f f
3rd f f
4th f f
Line Pressure 211CH15
2) Clutch Pressure Optimal Control
The ECM monitors the signals from various types of sensor such as the input turbine speed sensor,
allowing shift solenoid valves SL1, SL2, and SL3 to minutely control the clutch pressure in accordance
with engine output and driving conditions.
As a result, smooth shift characteristics have been realized.
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