1999 LEXUS SC300 ECU

KEYS AND DOORS
17
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
at the bottom of the instrument cluster 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 built±in
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.

KEYS AND DOORS
20In the following cases, the battery in the key may be
discharged. If this is a case, replace it using a special
screwdriver.


The remote control does not work.

The operational range of wireless remote control becomes
extremely short.

The indicator light on the key is dimmed or does not come
on.
For the replacement of the battery, see ºReplacing the
batteryº on page 25. You can also have the battery of the key
replaced by your Lexus dealer.
If you lose the wireless key, contact your Lexus dealer as soon
as possible to avoid the possibility of theft, or an accident.
You can use up to 4 wireless remote control keys for the same
vehicle. Contact your Lexus dealer for detailed information.
The wireless remote control key is an electronic
component. Observe the following instructions in order
not to cause damage to the key.

Do not leave the wireless remote control key on places
where the temperature becomes high such as on the
dashboard.

Do not disassemble it.

Avoid knocking it hard against other objects or dropping
it.

Avoid putting it in water.
Locking/Unlocking the doors
When you push the ºLOCKº button on the key briefly, all
the doors can be locked from outside the vehicle.
At this time, you can hear one beep. However, when you push
the ºLOCKº 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 ºUNLOCKº 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 ºLOCKº button once again. If they were
already locked, the turn signal lights will flash.
NOTICE
Do not push the ºLOCKº button any longer than 2 to 3
seconds. Pushing the button longer activates an alarm.
For details, see page 22.
When you push the ºUNLOCKº 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.

KEYS AND DOORS
27
NOTICE

Make sure the positive side and negative side of the
battery should be faced correctly.

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 O±ring.
5. Install the lid with the O±ring and 2 screws.
NOTICE
Take care not to damage or bend the O±ring when
installing.
6. Install the module into the key frame and secure the cover
with the screw.
7. When pushing any switch on the wireless key, make sure
the indicator light comes on.
DOORS
Locking with key

GAUGES, METERS AND SERVICE REMINDER INDICATORS
57
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.
(f) 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 ºChecking the
engine oil levelº on page 342.)
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.
(g) Malfunction Indicator Lamp
This lamp comes on in the following cases.
a. The fuel tank is completely empty. (See ºFuel gaugeº on
page 49 for instructions.)
b. The fuel tank cap is not tightened securely (SC400 only).
(See ºFuel tank capº on page 85 for instructions.)
c. There is a problem
somewhere in your engine or automatic
transmission electrical system.
If it comes on while you are driving in case ºc.º, have your
vehicle checked/repaired by your Lexus dealer as soon as
possible.
(h) ºABSº Warning Light
This light warns that there is a problem somewhere in your
anti±lock brake system.
If the light comes on while you are driving, have your vehicle
checked by your Lexus dealer as soon as possible.
The light will come on when the ignition key is turned to
ºONº, and will go off after about a few seconds.
When the ºABSº warning light is on (and the brake system
warning light is off), the brake system operates
conventionally but anti±lock brake system is not assisting
brake performance so that the wheels could lock up during a
sudden brake or braking on slippery road surfaces.

INTERIOR EQUIPMENT
73
GARAGE DOOR OPENER
The garage door opener is manufactured under license
from HomeLink and can be programmed to operate
garage doors, estate gates, security lighting, etc.
(a) Programming HomeLink
The HomeLink has 3 buttons and can be pr ogrammed to
operate 3 separate devices.
Prepare the HomeLink
 for programming by erasing all
codes or the memorized data programmed by the former
owner. Follow the procedure in º(c) Erasing the garage
door opener memoryº.
1. Decide which one of the 3 buttons you want to program.
Push and hold down the button for about 20 seconds until the
indicator light begins to flash. While holding this button,
follow steps º2º and º3º.

INTERIOR EQUIPMENT
76
CUP HOLDERS
To use the cup holder:
Push the end of the cup holder portion of the console box.
Grasp the cup holder lever and pull it down completely.The cup holder is designed for holding cups or drink±cans
securely in its holes.

INTERIOR EQUIPMENT
80
LUGGAGE STOWAGEPRECAUTIONS
When stowing luggage or cargo in the vehicle, observe the
following:

Put luggage or cargo in the trunk when at all possible. Be
sure all items are secured in place.

Be careful to keep the vehicle level. Placing the weight as
far forward as possible helps maintain vehicle balance.

For better fuel economy, do not carry unnecessary weight.
CAUTION

Do not place anything on the filler panel behind the rear
seatback. Such items may be thrown about and possibly
injure people in the vehicle during sudden braking or an
accident.

Do not drive with objects left on top of the instrument
panel. They may interfere with the driver's field of view.
Or they may move during sharp vehicle acceleration or
turning, and impair the driver's control of the vehicle. In
an accident they may injure the vehicle occupants.
NOTICE
Do not load the vehicle beyond the vehicle capacity
weight specified on the tire pressure label.

EXTERIOR EQUIPMENT
82
Insert your fingers under the hood, push up the auxiliary
catch lever and lift the hood.Before closing the hood, check to see that you have not
forgotten any tools, rags, etc. Then lower the hood and make
sure it locks.
CAUTION
Before driving, be sure that the hood is closed and securely
locked. Otherwise, the hood may open unexpectedly while
driving and an accident may occur.