2002 Lexus ES300 ECU

For detailed information, refer to the description given in each section\
.
PICTORIAL INDEX
viPage
1
Door lock switch and power window
switches 21, 38
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Driving position memory switches 150
. . . . . . . . . . .
3 Power rear view mirror control switches 100 . . . . . .
4 Side vents 168
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Instrument panel light control dial 59
. . . . . . . . . . . . .
6 Headlight, turn signal and
fog light switches 26, 28, 31, 32
. . . . . . . . . . . . . . . . . . .
7 Multiinformation display control switches 57 . . . .
8 Ignition switch 220
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Wiper and washer switches 32
. . . . . . . . . . . . . . . . . . .
10 Seat heater switches 42
. . . . . . . . . . . . . . . . . . . . . . . . .
11 Emergency flasher switch 41
. . . . . . . . . . . . . . . . . . . .
12 Clock 65
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . .
13 Car audio 172, 193
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14 Front passenger’s seat belt reminder light 51 . . . . .
15 Security indicator light 12, 154
. . . . . . . . . . . . . . . . . . . Page
16 Glove box
68
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17 Automatic air conditioning controls 158
. . . . . . . . . .
18 Rear window and outside rear view mirror
defogger switch 37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19 Ashtray 66
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
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20 Automatic transmission selector lever 223 . . . . . . . .
21 Rear electric sunshade switch 77
. . . . . . . . . . . . . . . .
22 Electronic modulated suspension
control switch 233 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23 Traction control system off switch 234
. . . . . . . . . . .
24 Cruise control switch 230
. . . . . . . . . . . . . . . . . . . . . . .
25 Power adjustable pedals switch 98
. . . . . . . . . . . . . . .
26 Parking brake pedal 221
. . . . . . . . . . . . . . . . . . . . . . . . .
27 Auxiliary box 74
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28 Hood lock release lever 82
. . . . . . . . . . . . . . . . . . . . . .
29 Trunk lid opener 83
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30 Fuel filler door opener 85
. . . . . . . . . . . . . . . . . . . . . . . .

KEYS AND DOORS
9
Flat key
As a transponder chip is built in its key case, you can start
the engine with this key.
The flat key works in every lock.
A transponder chip for engine immobiliser system has been
filled in the key case of the flat key. This chip is needed to
enable the system to function correctly, so be careful not to
lose this key. If you make your own duplicate key, you will not
be able to cancel the system or start the engine.
Insert your key plate in its key case as shown. We recommend
that you always carry this with you for emergency use. Do not
leave it in your vehicle.
Starting the engine using a flat key
1. Remove the key plate from the key case.
2. Insert the key plate into the ignition switch. The indicator
light keeps flashing.
3. Bring the key case closer to the ignition switch within 10
seconds as indicated by the arrow head. The indicator light
goes out. This means the engine immobiliser system is
automatically canceled. (For details, see “Engine immobiliser
system” on page 12.) You can put the key case away then. You
cannot cancel the engine immobiliser system if 10 seconds
have past after you inserted the key plate. You need to remove
the key plate from the ignition switch and try it again from the
step 2.
4. Start the engine within 20 seconds after the security
indicator light goes out. You cannot start the engine if 20
seconds have past after the security indicator went off. You
need to remove the key plate from the ignition switch and try
it again from the step 2.

KEYS AND DOORS
12
ENGINE IMMOBILISER SYSTEM
The engine immobiliser system is a theft prevention
system. When you insert the key in the ignition switch, the
transponder chip in the key’s head transmits an electronic
code to the vehicle. The engine will start, only when the
electronic code in the chip corresponds to the registered
ID code for the vehicle.
The system is automatically set when the key is removed from
the ignition switch. At this time, the security indicator light
flashes. When you insert the key in the ignition switch, the
security indicator light goes out and the system is canceled
automatically, which enables the engine to start.
For your Lexus dealer to make you a new key with builtin
transponder chip, your dealer will need your key number and
master key. However, there is a limit to the number of
additional keys your Lexus dealer can make for you.If you make your own duplicate key, you will not be able
to cancel the system or start the engine.
For vehicles sold in U.S.A.
FCC ID: MOZRI16BTYB MADE IN JAPAN
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference,
and (2) this device must accept any interference
received, including interference that may cause
undesired operation.
CAUTION
Changes or modifications not expressly approved by
the party responsible for compliance could void the
user’s authority to operate the equipment.
For vehicles sold in Canada
This device complies with RSS210 of Industry
Canada.
Operation is subject to the following two conditions: (1)
This device may not cause interference, and (2) this
device must accept any interference, including
interference that may cause undesired operation of the
device.

KEYS AND DOORS
14
Locking/Unlocking the doors
When you push the “LOCK” button on the key briefly, all
the doors can be locked from outside the vehicle.
At this time, one beep sounds and the turn signal lights flash
once.* However, when you push the “LOCK” button with any
door not closed securely, the buzzer sounds for 10 seconds.**
To stop the buzzer, close all the doors securely or push the
“UNLOCK” button. If the key is in the ignition switch, locking
cannot be done.
Make sure all the doors are locked when you leave the vehicle.
Push the “LOCK” button once again.
NOTE:
* The turn signal lights can be set not to flash and beep
volume can be changed.
** The buzzer can be set not to sound if a door is not closed
securely.
Ask your Lexus dealer for details.
NOTICE
Do not push the “LOCK” button any longer than 2 to 3
seconds. Pushing the button longer activates an alarm.
For details, see page 16.
When you push the “UNLOCK” button, the driver’s door
is unlocked. Pushing that button once again within 3
seconds from the first push, all other doors are also
unlocked.*
NOTE:
* The 2step unlocking function can be changed.
Ask your Lexus dealer for details.
At this time, two beeps sound and the turn signal lights flash
twice.* Together with the activation of unlocking, the interior
light comes on for 15 seconds if the interior light switch is in
“DOOR” position.** However, this function does not work
when the ignition key is in the “ACC” or “ON” position. For\
further information, see “Illuminated entry system” on page 64.
You have 30 seconds to open a door after using the wireless
remote unlock feature.*** If a door is not opened by then, all
the doors will be automatically locked again.
Even if the “LOCK” or “UNLOCK” button is kept pressed in, the
locking or unlocking operation is not repeated. Release the
button and then push again. NOTE:
* The turn signal lights can be set not to flash and beep
volume can be changed.
** The duration of lighting can be changed
*** The time before automatic relocking can be changed.
Ask your Lexus dealer for details.

KEYS AND DOORS
19
3. Remove the 2 screws to take out the lid of the module.
4. Take out the discharged battery and put a new battery with
the positive side up.
NOTICE
Make sure the positive side and negative side of the
battery should be faced correctly.
 Do not replace the battery with wet hands. Water may
cause unexpected rust.
 Do not touch or move any components inside of the
transmitter, or it may interfere with proper operation.
 Be careful not to bend the electrode of the battery
insertion and that dust or oils do not adhere to the
inside of the module.
 Take care not to lose the screws and Oring.
5. Install the lid with the 2 screws.
NOTICE
Take care not to damage or bend the Oring when
installing.
6. Install the module into the key frame and secure the cover
with the screw.
7. When pushing any button on the wireless key, make sure
the indicator light comes on.

SWITCHES
36
Shifting the windshield wiper position
 1Rest position 2Retracted position
The wiper blades retract under the hood when the wipers are
turned off.
In the following cases, the wipers should be shifted from the
retracted position (position 2) to the rest position (position 1)
above the hood level.
 When cleaning the windshield
 When inspecting or replacing the wipers
 When the retraction may be obstructed by snow, etc., at the
bottom of the windshield
Other than the above cases, keep the wipers in the retracted
position.
* More than 10 cm (3.9 in.)
SHIFTING TO THE REST POSITION
Hold the connection of the wiper arm and wiper blade and
pull it upward for more than 10 cm (3.9 in.) along the
windshield glass with the force of about 98 N (10 kgf, 22
lbf).
NOTICE
To prevent the wiper blades from being deformed, be
sure to hold the connection of the wiper arm and wiper
blade securely.

SWITCHES
37
RETURNING TO THE RETRACTED POSITION
Push the connection of the wiper arm and wiper blade
downward.
NOTICE
To prevent the wiper blades from being deformed, be
sure to hold the connection of the wiper arm and wiper
blade securely.
REAR WINDOW AND OUTSIDE
REAR VIEW MIRROR DEFOGGER SWITCH
To turn the electric rear window and outside rear view
mirror defogger on, push the switch.
The ignition key must be in the “ON” position.
The thin heater wires on the inside of the rear window and the
heater panels in the outside rear view mirrors will quickly clear
the surface. An indicator light is on when the defogger is
operating.
The system will automatically shut off when the defogger has
operated about 15 minutes.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
52
NOTICE
Do not continue driving if the engine drive belt is broken
or loose.
(f) Low Engine Oil Pressure Warning Light
This light warns that the engine oil pressure is too low.
If it flickers or stays on while you are driving, pull off the road
to a safe place and stop the engine immediately. Call a Lexus
dealer or qualified repair shop for assistance.
The light may occasionally flicker when the engine is idling or
it may come on briefly after a hard stop. There is no cause for
concern if it then goes out when the engine is accelerated
slightly.
The light may come on when the oil level is extremely low. It
is not designed to indicate low oil level, and the oil level must
be checked using the oil level dipstick.
NOTICE
Do not drive the vehicle with the warning light on even
for one block. It may ruin the engine.
(g) Low Engine Oil Level Warning Light
This light warns that the engine oil level is too low. Add oil as
soon as possible. (For instructions, see “Checking the engine
oil level” on page 302.)
While driving on steep inclines or rough roads which causes
the vehicle to substantially sway or on curves, this light may
come on due to the movement of engine oil in the engine.
NOTICE
Continued engine operation with low engine oil will
damage the engine.
(h) Malfunction Indicator Lamp
This lamp comes on when the ignition key is turned to the
“ON” position and goes off after the engine starts. This
means that the warning light system is operating properly.
If the lamp remains on, or the lamp comes on while
driving, first check the followings.
 Empty fuel tank
If the fuel tank is empty, refuel immediately.
 Loose fuel tank cap
If the fuel tank cap is loose, securely tighten it.
These cases are temporary malfunctions. The malfunction
indicator lamp will go off after taking several driving trips.