Lexus ES300 (2002 year). Service manual - part 125

CHASSIS – U150E AUTOMATIC TRANSAXLE

CH-29

SL1



x 

 



x 

 

x 

 

SL2

Solenoid

SL2

x

SL2
Malfunction

Solenoid
Valve

SL3

x

x

x

 
 x

 
 x

Malfunction

S4

x 

 

x 

 

x 

 

x 

 



Gear Position

1st 

 4th

2nd 

 4th

3rd 

 4th

4th

5th 

 4th

SL1



x



x 

 

x 

 

SL3

Solenoid

SL2











SL3
Malfunction

Solenoid
Valve

SL3

x

Malfunction

SL4

x

x

x

x 

 



Gear Position

1st

2nd

3rd

4th

5th 

 4th

SL1



x



x

x

S4

Solenoid

SL2











S4
Malfunction

Solenoid
Valve

SL3

x

x

x





Malfunction

S4

x

Gear Position

1st

2nd

3rd

4th

5th 

 4th

SL1

x

SL1, SL2,

Solenoid

SL2

x

SL1, SL2,
SL3, and S4

Solenoid
Valve

SL3

x

,

Malfunction

S4

x

Gear Position

1st 

 4th

2nd 

 4th

3rd 

 4th

4th

5th 

 4th

CHASSIS – U150E AUTOMATIC TRANSAXLE

CH-30

211CH24

211CH23

Shift Pattern

211CH25

Key Cylinder

Override Button

Shift Lock Unit

 Shift Lock Solenoid

 Shift Lock ECU

Key Lock Cable

Stop Light Switch

SHIFT CONTROL MECHANISM

1. General

 A gate type shift lever that uses a shift control cable has been newly adopted in conjunction with the

installation of the 5-speed automatic transaxle.
With the gate type, the shift lever button and the overdrive switch of the straight type shift lever have been
discontinued. Similar functions are achieved through a single-shift operation (fore-aft and side-to-side).

 A shift lock system consists of the key interlock device and shift lock mechanism, has been adopted.

2. Shift Lock System

General

 A shift lock system of the key interlock device and shift lock mechanism, that prevents the unintended

operation of the shift lever has been provided.

 A mechanical key interlock device that uses the key lock cable has been adopted.
 An electrical shift lock mechanism, in which a shift lock solenoid and a shift lock ECU are integrated, has

been adopted.

Layout of Component

CHASSIS – U150E AUTOMATIC TRANSAXLE

CH-31

211CH26

P Position

Except P Position

LOCK

ACC

IG Key

Lock Plate

Lock Pin

Cam

Key Lock Cable

208CH13

Stop Light Switch

Ignition Switch

Shift Lock Unit

Shift Lock

ECU

Shift Lock

Solenoid

Key Interlock Device

1) General

 This device will not allow the ignition key to be turned to the LOCK position or to pull out the ignition

key unless the shift lever is moved to the P position.

 This device, in which the shift lever and the key cylinder are connected via the key lock cable,

mechanically limits the movement or the ignition key through the movement of the shift lever.

2) Construction and Operation

 The key cylinder contains a cam and a lock pin that move in unison with the ignition key. In addition,

a key lock cable and a lock plate are placed above the lock pin.

 When the driver moves the shift lever, the lock plate slides to restrict the movement of the lock pin,

which in turn, restricts the movement of the ignition key.

Shift Lock Mechanism

 The shift lock mechanism prevents the shift lever from being shifted out of the “P” position to any other

position unless the ignition switch is turned ON and the brake pedal is pressed.

 A shift lock override button, which manually overrides the shift lock mechanism, is provided.

 System Diagram 



CHASSIS – U150E AUTOMATIC TRANSAXLE

CH-2

CHASSIS

211CH01

U150E AUTOMATIC TRANSAXLE

DESCRIPTION

The U150E automatic transaxle (hereafter referred to as “A / T”) is a newly developed, compact and high-
capacity 5-speed Super ECT (Electronically Controlled Transaxle).
Based on the U140E A / T of the ’01 ES300, this U150E A / T has been changed into a 5-speed to improve
fuel economy and dynamic performance.

– Main Changes (from U140E A / T) –

 Direct & O/D (C

0

) clutch and 2 solenoid valves (SL3, SR) have been adopted.

 Fluid passages have been changed for the 5-speed applicaton.

 Specification 



Model

’02 ES300

’01 ES300

Transaxle Type

U150E

U140E

Engine Type

1MZ-FE

1st

3.938

2nd

2.194

Gear Ratio*

1

3rd

1.411

Gear Ratio*

1

4th

0.973

1.019

5th

0.703

–

Reverse

3.141

Counter Gear Ratio

1.019

Differential Gear Ratio

3.478

2.642

Fluid Capacity

Liters (US qts, Imp. qts)

9.1 (9.5, 7.9)*

2

8.4 (8.9, 7.4)*

2

Fluid Type

ATF Type T-IV

Dry Weight

kg (lb)

94.1 (207.5)

91 (200.6)

*

1

: Counter Gear Ratio Included

*

2

: Differential Included