brake lexus LS400 1999 Electrical Components / LEXUS 1999 LS400 (OM50514U) User Guide

GAUGES, METERS AND SERVICE REMINDER INDICATORS
66If the brake fluid level is correct ...
Have
the warning system checked by your Lexus dealer.
(b) Driver's Seat Belt Reminder Light
and Buzzer
Once the ignition key is turned to ºONº or ºSTARTº, the
reminder light flashes and buzzer sounds if the driver's
seat belt is not fastened. Unless the driver fastens the
belt, the light stays flashing and the buzzer stops after
about 4 to 8 seconds.
(c) Front Passenger's Seat BeltReminder Light
Once the ignition key is turned to ºONº or ºSTARTº, the
reminder light flashes if a passenger sits in the front
passenger seat and does not fasten the seat belt.
Unless the front passenger fastens the belt, the light
stays flashing.
If luggage load is placed on the front passenger seat,
depending on its weight and how it is placed on the seat,
built±in sensors in the seat cushion may detect the
pressure, causing the reminder light to come on.
(d) SRS Warning Light
The indicators come on when the ignition key is
turned to the ºACCº or ºONº position. It goes off
after about 6 seconds. This means the SRS is
operating properly.
The SRS warning light system monitors the airbag
sensor assemblies, inflators, seat belt pretensioners,
warning light, interconnecting wiring and power sources.
If either of the following conditions occurs, this indicates
a malfunction somewhere in the parts monitored by the
warning light system. Contact your Lexus dealer as
soon as possible to service the vehicle.
 The light does not come on as described above.
 The light stays on or flashes.
 The light comes on or starts flashing while driving.
If the light stays on, it indicates that the driver and front
passenger airbags fail. If the light flashes, the side
airbags and/or seat belt pretensioners fail.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
67
(e) Discharge Warning Light
This light warns that the battery is being discharged.
If it comes on while you are driving, stop the vehicle, turn
off the engine, and check for the cause. Look first at the
engine drive belt.
If it is loose or broken, the generator will not charge
the battery properly.
 If the belt is O.K., there is a problem somewhere in the
charging system.
The engine ignition will continue to operate, however,
until the battery is discharged. Turn off the air
conditioning, blower, radio, etc., and drive directly to the
nearest Lexus dealer or repair shop.
NOTICE
Do not continue driving if the engine drive belt is broken or loose.
(f) Malfunction Indicator Lamp
This lamp comes on in the following cases.
a. The fuel tank is completely empty. (See ºFuel gaugeº
on page 57 for instructions.)
b. The fuel tank cap is not tightened securely. (See
ºFuel tank capº on page 110 for instructions.)
c. There is a problem somewhere in your engine
electrical system, automatic transmission electrical
system or electronic throttle control system.
If it comes on while you are driving in case ªc.º, have your
vehicle checked/repaired by your Lexus dealer as soon
as possible.
(g) 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

GAUGES, METERS AND SERVICE REMINDER INDICATORS
68road surfaces.
(h) Open Door Warning Light
This light remains on until all the doors are completely
closed.
(i) Low Fuel Level Warning Light
This light comes on when the fuel level in the tank
becomes
nearly empty. F ill the tank as soon as possible.
On inclines or curves, due to the movement of fuel in the
tank, the low fuel level warning light may come on earlier
than usual.
(j) Key Reminder Buzzer
This buzzer reminds you to remove the key when you
open the driver's door with the ignition key in the ºACCº
or ºLOCKº position.
How to check all the service reminder
indicators
(except the low fuel level warning light):
1. Apply the parking brake.
2. Open the door.
The following service reminder indicator should come
on. It goes off when you close the door completely.
3. Turn the ignition key to ºACCº.
The following service reminder indicator should come
on. It goes off after 6 seconds.
4. Turn the ignition key to ºONº.
The following service reminder indicators should come
on.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
76When your brake pads are worn enough to require
replacement, the above message appears, the
reminder
light flashes and the warning tone sounds.
If this message appears while you are driving, have the
brake pads checked and replaced by your Lexus dealer
as soon as possible.
W43W43
W42W42
W45±1
W44W44
W46W46
When any door or trunk is open with the ignition
switch turned on, the message which door or trunk
is open appears, and the reminder light comes on. If you continue driving with any door or trunk open, the
reminder light starts flashing and the warning tone
sounds to remind you to close the door or trunk.
W52W52
If the driver's door is opened with the ignition switch
turned off and the moon roof opened, the above
message appears and the reminder light flashes.
W48W48

GAUGES, METERS AND SERVICE REMINDER INDICATORS
78
W49W49
In the following cases, the above message appears,
the reminder light comes on and the warning tone
sounds.
When the headlight switch is turned to the first or
second clickstop with one or more of tail light bulbs
burned out.
 When the brake pedal is held down with one or more
of stop light bulbs burned out.
Have defective bulbs replaced as soon as possible.
W50W50
When the engine oil level is too low, the above
message appears, the reminder light comes on and
the warning tone sounds.
Add oil as soon as possible. (For instructions, see
ºChecking the engine oil levelº on page 405.)
NOTICE
Continued engine operation with low engine oil will damage the engine.

COMFORT ADJUSTMENT
206Conditions for memorized position activation

Ignition key ºONº and selector lever in ºPº position.
All parts of the memorized positions can be activated.
However, if the brake pedal is being depressed, the
seat position will not change.
 Key not in ignition switch and within 30 seconds of
opening driver's door.
The memorized position can be activated, except for
the tilt and telescopic steering.
If any driving position memory switch is pushed while
one of the memorized driving position profiles is being
activated, the operation will stop.
To activate the system, push the desired button (º1º or
º2º) again.
The driving position memory control system cannot be
operated while the vehicle is moving.
If the vehicle's battery is disconnected, the computer's
memory will be erased and the memorized positions will
have to be set again.

COMFORT ADJUSTMENT
207
CAUTION
Do not start the vehicle while the adjustments are
being made.
Take care not to select the wrong button, or the seat
could strike the rear passenger or hit your body
against the steering wheel. If this happens, you can
stop the movement by pressing another driving
position memory switch, or depressing the brake
pedal.

SECTION 3 ± 1
271
STARTING AND DRIVING
Starting and driving
Three±way catalytic converter271
. . . . . . . . . . . . . . . . . .
Engine exhaust caution 274
. . . . . . . . . . . . . . . . . . . . . . . .
Before starting the engine 275
. . . . . . . . . . . . . . . . . . . . . .
Ignition switch with steering lock 276
. . . . . . . . . . . . . . . .
Parking brake 279
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to start the engine 280
. . . . . . . . . . . . . . . . . . . . . . . .
Automatic transmission 281
. . . . . . . . . . . . . . . . . . . . . . . .
Electronic throttle control system 295
. . . . . . . . . . . . . . . .
Cruise control 297
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronically modulated air suspension 301
. . . . . . . . . .
Traction control system 304
. . . . . . . . . . . . . . . . . . . . . . . .
Vehicle skid control system 307
. . . . . . . . . . . . . . . . . . . . .
Brake system 313
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Types of tires 319
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THREE±WAY CATALYTIC
CONVERTER

STARTING AND DRIVING
279
PARKING BRAKE
31L005
1To set: Fully depress the parking brake pedal.
2To release: Pull the parking brake release lever.
Before leaving your vehicle, firmly apply the parking
brake.
CAUTION
Before driving, make sure the parking brake is fully
released and that the parking brake reminder light is off.

STARTING AND DRIVING
280
HOW TO START THE ENGINE
Before cranking
1. Apply the parking brake firmly.
2. Turn off unnecessary lights and accessories.
3. Put the selector lever in ºPº. If you need to restart the
engine while the vehicle is moving, put the selector lever
in ºNº. A starter safety device will prevent the starter
from operating if the selector lever is in any drive
position.
4. Depress the brake pedal and hold it to the floor until
you are ready to drive off.
Starting the engine
Before starting the engine, be sure to follow the
instructions in ºBefore crankingº.
Normal starting procedure
The multiport fuel injection system/sequential multiport
fuel injection system in your engine automatically
controls the proper air±fuel mixture for starting. You can
start a cold or hot engine as follows:
1. With your foot off the accelerator pedal, crank the
engine by turning the key to ºSTARTº. Release it when
the engine starts.
2. After the engine runs for about 10 seconds, you are
ready to drive. If the weather is below freezing, let the engine warm up
for a few minutes before driving. Do not leave the vehicle
while the engine is warming up.
If the engine stalls ...
Simply restart it , using the correct procedure given in
normal starting.
If the engine will not start
See ºIf your vehicle will not startº on page 342.
NOTICE
Do not crank for more than 30 seconds at a
time. This may overheat the starter and wiringsystems.
Do not race a cold engine.
If the engine becomes difficult to start or stallsfrequently, have the engine checkedimmediately.