Lexus RX300 (MCU15). Service manual — part 47

CHASSIS — U140F AUTOMATIC TRANSAXLE

CH

BO

161ES09

B

1

F

1

B

2

C

2

C

1

Front Planetary Gear

Counter Drive Gear

Input Shaft

Rear Planetary Gear

Sun Gear

Intermediate Shaft

C

3

Differential
Drive Pinion

F

2

B

3

U/ D Planetary Gear

Sun Gear

Counter Driven Gear

Ring Gear

B

1

F

1

B

2

C

2

C

1

Front Planetary Gear

Counter Drive Gear

Input Shaft

Rear Planetary Gear

Sun Gear

Intermediate Shaft

C

3

Differential
Drive Pinion

F

2

B

3

U/ D Planetary Gear

Sun Gear

Counter Driven Gear

Ring Gear

B

1

F

1

B

2

C

2

C

1

Front Planetary Gear

Counter Drive Gear

Input Shaft

Rear Planetary Gear

Sun Gear

Intermediate Shaft

C

3

Differential
Drive Pinion

F

2

B

3

U/ D Planetary Gear

Sun Gear

Counter Driven Gear

Ring Gear

161ES10

161ES11

61

1) 1st Gear (D or 2 Position)

2) 2nd Gear (D or 2 Position)

3) 3rd Gear (D Position)

CHASSIS — U140F AUTOMATIC TRANSAXLE

161ES12

161ES13

181CH66

B

1

F

1

B

2

C

2

C

1

Front Planetary Gear

Counter Drive Gear

Input Shaft

Rear Planetary Gear

Sun Gear

Intermediate Shaft

C

3

Differential
Drive Pinion

F

2

B

3

U/ D Planetary Gear

Sun Gear

Counter Driven Gear

Ring Gear

B

1

F

1

B

2

C

2

C

1

Front Planetary Gear

Counter Drive Gear

Input Shaft

Rear Planetary Gear

Sun Gear

Intermediate Shaft

C

3

Differential
Drive Pinion

F

2

B

3

U/ D Planetary Gear

Sun Gear

Counter Driven Gear

Ring Gear

B

1

F

1

B

2

C

2

C

1

Front Planetary Gear

Counter Drive Gear

Input Shaft

Rear Planetary Gear

Sun Gear

Intermediate Shaft

C

3

Differential
Drive Pinion

F

2

B

3

U/ D Planetary Gear

Sun Gear

Counter Driven Gear

Ring Gear

62

4) 4th Gear (D Position)

5) 1st Gear (L Position)

6) Reverse Gear (R Position)

CHASSIS — U140F AUTOMATIC TRANSAXLE

CH

BO

63

JHYDRAULIC CONTROL SYSTEM

1. General

The hydraulic control system is composed of the oil pump, the valve body, the solenoid valves, the accumula-
tors, the clutches and brakes as well as the fluid passages which connected all of these components.
Based on the hydraulic pressure acting on the torque converter clutch, clutches and brakes in accordance
with the vehicle driving conditions.

Fluid passage
switching &
Hydr. pressure control

OIL PUMP

Engine & ECT ECU

Hydr.
pressure
control

HYDRAULIC CONTROL SYSTEM

ACCUMULATORS

CLUTCH & BRAKE

Planetary gear units

Torque converter clutch

SOLENOID VALVES

165CH56

VALVE BODY

2. Valve Body

The valve body has a two-stage construction. Also, a compact, lightweight, and highly rigid valve body
has been realized. All the solenoid valves are installed in the lower valve body.

181CH111

Solenoid Valve SLT

Solenoid
Valve S4

Lower Valve
Body

Fluid Temperature
Sensor

Plate

Upper Valve Body

Solenoid Valve SL1

Solenoid Valve DSL

Solenoid Valve SL2

CHASSIS — U140F AUTOMATIC TRANSAXLE

NE

THW

VTA

SL1

SPD

W

STP

THO

ODMS

NSW

R,D,2,L

NT

SL2

SLT

S4

Engine

&

ECT

ECU

NC

MPX2

KD

DSL

ODLP

SIL

TC

*: Only for the European LHD Models.

64

JELECTRONIC CONTROL SYSTEM

1. Construction

The configuration of the electronic control system in the U140F automatic transaxle is as shown in the
following chart.

SENSORS

CRANKSHAFT POSITION

SENSOR

WATER TEMP. SENSOR

THROTTLE POSITION SENSOR

NEUTRAL START SWITCH

KICK DOWN SWITCH*

VEHICLE SPEED SENSOR

COMBINATION METER

BODY ECU

SNOW MODE SWITCH

COUNTER GEAR SPEED

SENSOR

INPUT TURBINE SPEED

SENSOR

STOP LIGHT SWITCH

FLUID TEMPERATURE

SENSOR

OVERDRIVE SWITCH

ACTUATORS

SOLENOID VALVE SL1

SOLENOID VALVE SL2

SOLENOID VALVE SLT

SOLENOID VALVE S4

SOLENOID VALVE DSL

CHECK ENGINE

WARNING LIGHT

O/D OFF INDICATOR

DATA LINK CONNECTOR 3