2000 TOYOTA CAMRY engine

57 CHASSISÐAUTOMATIC TRANSAXLE
AUTOMATIC TRANSAXLE
 DESCRIPTION
The A14OE automatic transaxle is used on the 5S±FE engine model, and the A541E automatic transaxle is used ont
he 1MZ±FE engine model. The basic construction and operation are the same as those of the previous model.
However, the pattern select switch has been discontinued both from the A140E and A541E automatic transaxles.

Specifications
Engine Type
5S±FE1MZ±FE
Transaxle TypeA140EA541EItemA140EA541E
G
1st2.810u
Gear
Ratio2nd1.549uRatio3rd1.000u Overdrive0.7060.735
Reverse2.296u
Counter Gear Ratio0.945u
Differential Gear Ratio3.9443.933
Fluid Capacity
liters
Transmission5.6 (5.9, 4.9)6.8 (7.2, 5.9)
liters
(US qts, Imp.qts)
Differential1.6 (1.7, 1.4)0.9 (0.9, 0.8)
Fluid TypeSAE75W±90u

58CHASSISÐDRIVE SHAFT
DRIVE SHAFT
 DESCRIPTION
The 5S±FE engine model continues to use the same drive shaft used on the previous model.
Previously, the inboard joint of the drive shaft on the 1MZ±FE engine model was the bolt±mounted type. However,
on the new model, the inboard joint is the friction±welded integrated type.
On the new model with 1MZ±FE engine, the boot of the outboard joint are made of thermoplastic elastomer, which
has superior durability.

5S±FE Engine Model

1MZ±FE Engine Model

60CHASSISÐBRAKES
BRAKES
 DESCRIPTION
The ventilated disc brake is used for front brake on all models.
The rear drum brake is used on the 5S±FE engine model, and the rear solid disc brake is used on the 1MZ±FE engine
model.
The ABS is provided on the 5S±FE engine CE grade model as an option and on other models as standard.
An ABS actuator has been changed to the 2±position solenoid valve type actuator.
A compact and lightweight ABS & TRAC system, in which the ABS and TRAC functions are integrated, is made
available as an option on the LE and XLE grade models with the 1MZ±FE engine.
A portless and portless type master cylinder is used on the models with ABS & TRAC system.
The center lever type parking brake is adopted on all models.

61 CHASSISÐBRAKES

Specifications
Model
NewPrevious
Engine Type5S FE1MZ FE5S FE1MZ FEItem5S±FE1MZ±FE5S±FE1MZ±FE
MasterTypeTandemuuu
CylinderDiameter .mm (in.)25.4 (1.00)uuu
BrakeTypeTandemuuu
BoosterDiameter .in.8.5º+ 8.5º, 8º+ 9º *u8º + 9ºu
TypeVentilated Discuuu
Pad Area cm2 (in.2)48 (7.44)44 (6.82)48 (7.44)57 (8.84)
Front
BrakeWheel Cylinder Dia.
mm (in.)57.2 (2.25)60.33 (2.38)57.2 (2.25)57.2 (2.25)
42.8 (1.69) x2*
1
Rotor Size (D xT)*2
mm (in.)
255 x 28
(10.04 x 1.10)275 x 28
(10.83 x 1.10)255 x 28
(10.04 x 1.10)275 x 28
(10.83 x 1.10)
TypeLeading±
TrailingLeading±
Trailing
RearLining Area cm2 (in.2)77 (11.94)77 (11.94)
Drum
BrakeWheel Cylinder Dia.
mm (in.)19.05 (0.75)20.64 (0.81)
Drum Inner Dia.
mm (in.)228.6 (9.00)228.6 (9.00)
TypeSolid Discu*1 u
RearPad Area cm2 (in.2)34 (5.27)u*1 uRear
Disc
Brake
Wheel Cylinder Dia.
mm (in.)34.9 (1.38)u*1 u
BrakeRotor Size (D xT)*2
mm (in.)
269 x 10
(10.59 x 0.39)u*1 u
TypeDual±P Valveuu*1u
BrakeDeflection Point of
Hydraulic Pressure1470 (15 213)2942 (30 427)2452 (25 356)2942 (30 427)Control
Valve
Hydraulic Pressure
kPa (kgf/cm
2, psi)
1470 (15, 213)2942 (30, 427)2452 (25, 356)2942 (30, 427)
ValvePressure Reduction
Gradient0.62u0.37u
ParkingTypeDrumuuuParking
Brake
Size .mm (in.)228.6 (9.00)170.0 (6.69)228.6 (9.00)
170.0 (6.69)*
1170.0 (6.69)
ABSSTD, OPT*3STDOPT, STD*4u
ABS & TRAC SystemÐOPT*5ÐÐ
*: TMM Produced Model, *1: Model with ABS, *2: D: Outer Diameter, T: Thickness,
*3: CE Grade Model, *4: XLE Grade Model, *5: LE and XLE Grade Model,

69 CHASSISÐBRAKES
 ABS & TRAC SYSTEM
1. General
The ABS & TRAC system totally controls the engine torque control through the fuel cutoff and the braking of the
driving wheels (front wheels). If helps to avoid slippage of the driving wheels that tends to happen during starting
and acceleration and to maintain an optimal driving force according to the road surface conditions. The system
eliminates the need for a subtle accelerator pedal opeation and ensures vehicle stability when starting, accelerating
or turning on slippery roads.
2. System Diagram

72CHASSISÐBRAKES
5. Function of Components
No.ComponentFunction
1Slip Indicator LightBlinks to inform the driver when the TRAC system is operated.
2TRAC OFF Indicator Light
Lights to inform the driver when the TRAC system is turned OFF by
the by the TRAC OFF switch. And, blinks to alert the driver when
the ECU detects the malfunction in the TRAC system.
3ECM
Sends signals to the ABS & TRAC ECU, such as the throttle
valve opening angle, specific volume of intake air signal, etc.
Controls the engine output and shift timing in accordance with
the fuel cutoff request and shift timing request that are output by
the ABS & TRAC ECU.
4ABS & TRAC ECU
Judges the vehicle driving condition based on signals from 4 speed
sensors and signals from ECM, and sends fuel cut and shift timing
demand signals to the ECM and brake control signal to the ABS &
TRAC actuator.
5ABS & TRAC Actuator
Controls the brake fluid pressure to each brake wheel cylinder
of the driving wheel (front wheel) by signals from the ABS &
TRAC ECU.
ABS & TRAC
Solenoid RelayDirects electricity to the solenoid valves in the actuator.
6ABS & TRAC
RelayPump Motor
RelayControls the pump motor operation in the actuator.
7Speed Sensors (Front and Rear)Detect the wheel speed of each of four wheels.
8Throttle Position SensorDetects the throttle valve opening angle.
9TRAC OFF SwitchTurns the TRAC system inoperative.

73 CHASSISÐBRAKES
6. Construction and Operation of Components
TRAC OFF Switch and Indicator Light
1) TRAC OFF Switch
When pressing, this switch turns the TRAC system to be inoperative. Pressing it again changes it to be operative.
When turning the ignition switch from ªOFFº to ªONº, TRAC system always becomes operative.
2) TRAC OFF Indicator Light
This light comes on when the TRAC system is set inoperative by the TRAC OFF switch, and informs the driver
accordingly. And blinks to alert the driver when a malfunction has occurred in the engine and TRAC system.
3) Slip Indicator Light
When the TRAC system is operative, the light blinks and informs the driver accordingly.
ABS & TRAC Actuator
1) Construction
The ABS & TRAC actuator consists of 12 two±position solenoid valves, 1 motor, 2 pumps 2 reservoirs and 2 pressure
regulator valves.
The 12 two±position solenoid valves consists of 2 master cut solenoid valves, 2 reservoirs cut solenoid valves, 4
pressure holding valves, and 4pressure reduction valves.
Pressure regulator valve is assembled into the master cut solenoid valve.
The basic construction and operation of the pump, reservoir, pressure holding valve, and pressure reduction valve
are shared with ABS.
a. Master Cut Solenoid Valve
When the TRAC system is active, a signal from the ABS & TRAC ECU causes the master cut solenoid valve to turn
ON in order to shut off the circuit between the master cylinder and the front brake wheel cylinder.

76CHASSISÐBRAKES
b. During Vehicle Acceleration (TRAC System Activated)
When a front wheel slips during acceleration, the TRAC system controls the engine output and braking of the front
wheels to help preventing wheel slippage.
The brake fluid pressure applied to the right and left front wheels is controlled separately accordingly to 3 control
modes ( pressure increase, holding, and pressure reduction) as explained below.
i) Pressure Increase Mode
During sudden acceleration or driving on a slippery surface, if the front wheels start to slip, a control signal from the
ABS & TRAC ECU causes the ABS & TRAC actuator to control the valves and pumps as described below, to effect
the pressure increase mode.
When the master cut and reservoir cut solenoid valves turn ON, port B is closed, port H is open and the pump operates
at the same time.
Accordingly, the brake fluid will be suctioned up from the master cylinder through parts G and H.
Then the brake fluid that is pressurized by the pump will be applied to the wheel cylinder through C and D.
Also, the brake fluid that pressurized by the pump is regulated to a constant pressure by the pressure regulator valve.

Hydraulic Circuit

Condition of Each Valve and Pump Motor
Part Name
Signal from
ABS & TRAC ECUOperation
Master Cut Solenoid ValveONPort BClosed
Reservoir Cut Solenoid ValveONPort HOpen
Pressure Holding ValveOFFPort COpen