Lexus ES300 (2002 year). Manual — part 76

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2001

TOYOTA MOTOR CORPORATION

All rights reserved. This book may not be repro-
duced or copied, in whole or in part, without the
written permission of Toyota Motor Corporation.
First Printing: Jul. 6, 2001 01–010706–00

FOREWORD

To assist you in your sales and service activities, this manual explains the main characteristics of the new
LEXUS ES300, in particular providing a technical explanation of the construction and operation of new
mechanisms and new technology used.

Applicable models: MCV30 series

This manual is divided into 3 sections.

1. New Model Outline – Explanation of the product to give a general understanding of its features.

2. Technical Description – Technical explanation of the construction and operation of each new system

and component.

3. Appendix — Major technical specifications of the vehicle.

CAUTION, NOTICE, REFERENCE and NOTE are used in the following ways:

CAUTION

A potentially hazardous situation which could result in injury to people may occur
if instructions on what to do or not do are ignored.

NOTICE

Damage to the vehicle or components may occur if instructions on what to do or not
do are ignored.

REFERENCE

Explains the theory behind mechanisms and techniques.

NOTE

Notes or comments not included under the above 3 titles.

For detailed service specifications and repair procedures, refer to the following Repair Manuals:

Manual Name

Pub. No.

2002 LEXUS ES300 Repair Manual

Vol. 1
Vol. 2

U150E Automatic Transmission Repair Manual

2002 LEXUS ES300 Electrical Wiring Diagram

Manual

RM911U1
RM911U2
RM913U
EWD458U

All information contained herein is the most up-to-date at the time of publication. We reserve the right to
make changes without prior notice.

BODY ELECTRICAL – AIR CONDITIONING

BE-26

211BE22

with Seat Heater Model

CONSTRUCTION AND OPERATION

1. Air Conditioning Control Panel

The air conditioning control panel uses push button controls and an LCD (Liquid Crystal Display) to dis-

play the set temperature, air outlet mode, and blower speed, to ensure excellent visibility.

This air conditioning control panel is integrated with the air conditioning ECU.
Along with the adoption of the left/right independent temperature control, the temperature control

switches for the driver and the front passenger have been located closer to the respective seats to enhance
their ease of use.

BODY ELECTRICAL – AIR CONDITIONING

BE-27

208BE16

Front

Evaporator

Heater Core

163BE17

Inner Fin

Antibacterial Agent

Nylon Layer

Chromate Layer

Aluminum
Matrix

2. Air Conditioning Unit

General

A semi-center location air conditioning unit, in which the evaporator and heater core are placed in the ve-
hicle’s longitudinal direction. As a result, the air conditioning unit has been made compact and light weight.

Evaporator

By placing the tanks at the top and the bottom of the evaporator unit and by adopting an inner fin construc-

tion, the following effects have been realized:

a) The heat exchanging efficiency has been improved.

b) The temperature distribution has been made more uniform.

c) The evaporator has been made thinner.

The evaporator body has been coated with a type of resin that contains an antibacterial agent in order to

minimize the source of foul odor and the propagation of bacteria.

BODY ELECTRICAL – AIR CONDITIONING

BE-28

152BE22

’02 ES300

’01 ES300

152BE21

163BE18

Swash Plate

Piston

Shaft

Swash Plate Chamber

160CM04

Clamp

Air Conditioning
Tube

Air Conditioning
Tube

Heater Core

A compact, lightweight, and highly efficient straight flow (full-path flow) aluminum heater core has been
adopted.

3. Compressor

A compact, lightweight, and low-noise swash
plate type compressor has been adopted on the ’02
ES300.

4. Quick Joint

The joint of the air conditioning tube, which
passes through the dash panel, has been changed
from the nut-and-union type that is used on the
previous model to the clamp type quick joint. As
a result, the ease of operation and service has been
improved.