Lexus ES300 (2002 year). Service manual - part 82

BODY ELECTRICAL – ACCESSORIES

BE-43

211BE29

Luggage Door 
Lock Motor

Luggage Door 
Courtesy Switch

Driver Side 
Key-linked 
Door Lock Switch

Courtesy 
Switches

D

P

RR

RL

Body ECU

RR

RL

P

D

BEAN

Door Lock 
Motors and
Position 
Switches

Front 
Passenger 
Door ECU

Driver 
Door ECU

 System Diagram 



2. Customize

Without using a hand-held tester, the setting of the automatic door lock/ unlock functions can be changed with
the following methods.

Function

Changing Methods

Shift-linked
automatic
door lock

1) Under the condition with all the doors closed, the ignition switch is turned to “ON” position.
2) Within 10 seconds after operating the above “1)”, keep pressing the front side (lock side) of

the driver’s door lock switch for 5 seconds.

3) Releasing the switch gives signal to complete the setting, therefore, the door lock will

lock / unlock one time each.

Speed-sensitive
automatic
door lock*

1) Under the condition with all the doors closed, the ignition switch is turned to “ON” position.
2) Move the shift lever from P to N position.
3) Within 10 seconds after operating the above “1)”, keep pressing the front side (lock side) of

the driver’s door lock switch for 5 seconds.

4) Releasing the switch gives signal to complete the setting, therefore, the door lock will

lock / unlock one time each.

Shift-linked
automatic
door unlock*

1) Under the condition with all the doors closed, the ignition switch is turned to “ON” position.
2) Set the shift lever in P position.
3) Within 10 seconds after operating the above “1)”, keep pressing the rear side (unlock side)

of the driver’s door lock switch for 5 seconds.

4) Releasing the switch gives signal to complete the setting, therefore, the door lock will

lock / unlock one time each.

Ignition
switch-linked
automatic
door unlock*

1) Under the condition with all the doors closed, the ignition switch is turned to “ON” position.
2) Move the shift lever from P to N position.
3) Within 10 seconds after operating the above “1)”, keep pressing the rear side (unlock side)

of the driver’s door lock switch for 5 seconds.

4) Releasing the switch gives signal to complete the setting, therefore, the door lock will

lock / unlock one time each.

BODY ELECTRICAL – ACCESSORIES

BE-44

211BE30

Body ECU

Key Unlock 
Warning Switch

Ignition 
Switch

Door Lock Assemblies

 Motor and Position Switch

Front Passenger Power Window Switch

 Front Passenger Door ECU

Door Lock Assemblies

 Motor and Position Switch

Power Window 
Master Switch

 Driver Door ECU

Door Courtesy 
Switch

Luggage Door Lock Assembly

 Motor and Courtesy Switch

3. Layout of Main Component

BODY ELECTRICAL – ACCESSORIES

BE-49

198BE30

Transponder Chip

Ignition Key

Key
Cylinder

Transponder Key Amplifier
with Key Coil

ECM

Spark Plug

Injector

Indicator
Light

Service Tip

In case of making new ignition key due to the loss of it, it is necessary to register ID code. Refer to see
the 2002 LEXUS ES300 Repair Manual (Pub. No. RM911U).

211BE33

ECM

Indicator Light

Transponder Key
Amplifier

ENGINE IMMOBILISER SYSTEM

1. General

 This system has been provided on the all models as standard equipment.
 The engine immobiliser system is theft deterrent system which disables the engine from starting using the

ignition key with an ID code that matched is the pre-registered code in the vehicle. This system consists
of the transponder chip, coil, amplifier, and immobiliser ECU. The immobiliser ECU is enclosed in the
ECM. This system adopts a transponder system which uses a transponder chip embedded in the grip of
the ignition key. When the coil located around the ignition key cylinder receives the ID code signal trans-
mitted by the transponder chip, the ECM determines whether or not the ID code matches the code stored.

 System Diagram 



2. Layout of Main Component

BODY ELECTRICAL – ACCESSORIES

BE-60

211BE39

Indicator Light

Garage Door Opener Switch

GARAGE DOOR OPENER

1. General

The garage door opener system has been adopted on the all model as standard equipment.
This system enables the garage door to be opened or closed from inside the vehicle by operating the switch
that is provided in the overhead console. This system provides the features listed below.

 Up to three types of transmitter codes can be registered in the garage door opener.

 The garage door opener switch is provided in the overhead console where it is easily accessible.

 An indicator light is provided to enable the operator to verify the operation mode of the garage door opener.

 A rolling code function has been adopted, which changes the transmitter code each time the garage door

opener switch is pressed.

2. Function

The following table shows the garage door opener function and the indicator light operation in each of the
modes.

Function

Outline

Indicator Light

Transmission
Mode

While the switch is being pressed, the garage door opener
transmits the code that was previously registered. Even if
the button is pressed continuously, the transmission stops
after 20 seconds.

Flash 

 On

(Rolling Code)
ON
(Except Rolling Code)

Learning
Mode

When the button is pressed continuously for 20 seconds,
the mode transfers to the learning mode in which a
transmitter code can be registered. In this mode, a new
transmitter code can be registered or an existing code can
be overwritten. If no codes are registered within 90 seconds
after transferring to the learning mode, the mode transfers
to the low power mode.

Slow flashing
(during learning mode)
Quick flashing
(registration completed)

All Delete
Mode

When the 2 outside buttons are pressed simultaneously for
20 seconds, all the transmitter codes that are registered in
the button are cleared.
By releasing the buttons within 10 seconds after clearing
the codes, the mode transfers to the learning mode.
By keeping the buttons pressed longer than 10 seconds
after clearing the codes, all the buttons will be registered
with a code for operation verification.

Quick flashing
(code clearing completed)

Low Power
Mode

If the button remains pressed longer than 100 seconds, such
as in the case in which the pressed button does not release
it self, the mode transfers to the low power mode to reduce
power consumption.

OFF