lexus LS400 1998 Audio System / LEXUS 1998 LS400 (OM50498U) Service Manual

SWITCHES
26The time interval between sweeps is shortened when the vehicle
speed increases. When the vehicle speed reaches more than about
20 km/h (12 mph) with the interval adjuster in ”F” position, the time
interval becomes the shortest 1.5 seconds.
If you stop the vehicle with the wiper switch in the ”LO” position,
the wiper speed automatically changes from low speed to
intermittent operation speed.* This function does not work when the
interval adjuster is in the ”F” position.
NOTE: *This feature can be set inoperative. Ask your Lexus
dealer for details.
For mist wiper operation (a single wipe), pull the lever toward
you and release it.
To make the washer squirt, push the button on the end of the
lever.
If the wiper lever is in the ”OFF” position, the wipers will
automatically operate a couple of times and a few seconds later,
make a single wipe again to sweep the windshield completely.* The
last sweep does not happen if the vehicle speed exceeds about 170
km/h (106 mph).
NOTE: *The last single wipe can be set inoperative. Ask your
Lexus dealer for details.
The warning message ”LOW WASHER FLUID” is displayed in the
multi information display when the fluid level in the tank becomes
nearly empty. For information on adding washer fluid, see ”Adding
washer fluid” on page 261.
In cold weather, warm the windshield with the defroster before using
the washer. This will help prevent icing, which could block your
vision.
NOTICE
Do not operate the wipers if the windshield is dry. It may scratch
the glass.

SWITCHES
27
HEADLIGHT CLEANER SWITCH
(CANADA ONLY)
12L0072
To spray fluid on the headlights, push the switch with the
headlights on.
The ignition key must be in the ”ON” position.
The warning message ”LOW WASHER FLUID” is displayed in the
multi information display when the fluid level in the tank becomes
nearly empty. For information on adding washer fluid, see ”Adding
washer fluid” on page 261.
NOTICE
Do not turn the headlight cleaner on with the tank empty. It may
cause the cleaner motor to overheat.
REAR WINDOW AND OUTSIDE
REAR VIEW MIRROR DEFOGGER
SWITCH
12L008-4
To turn the electric rear window 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.
Keep your hands off the mirror faces when the switch is on. An
indicator light is on when the defogger is operating.
The system will automatically shut off when the defogger has
operated about 15 minutes.

SWITCHES
28If further defrosting or defogging is desired, simply actuate the
switch again. When the surface has cleared, push the switch once
again to turn the defogger off. Continuous use may cause the battery
to discharge, especially during stopandgo driving. The defogger
is not designed to dry rain water or to melt snow.
If the outside rear view mirrors are heavily coated with ice, use a
spray deicer before operating the switch.
NOTICE
When cleaning the inside of the rear window, be careful not
to scratch or damage the heater wires.
To prevent the battery from being discharged, do not operate
the defogger continuously longer than necessary.
POWER WINDOW SWITCHES
12L009-2
1
For driver’s window
2
For front passenger’s window
3
For left rear window
4
For right rear window
To raise or lower the windows, use the switch on each door. The
passengers’ windows can also be controlled by the switches on
the driver’s door.
The power windows work when the ignition key is in the ”ON”
position.
Key off operation: Even if the ignition key is turned to the ”ACC”
or ”LOCK” position, the window can be operated until any of the
doors is opened (or for about 45 seconds).

SWITCHES
29
12L010
Operating the switches
To raise or lower the window, pull the switch halfway up or push
it halfway down.
Automatic operation: To fully raise or lower the window
automatically, pull the switch fully up or push it fully down.
To stop the window partway, lightly push or pull the switch in the
opposite direction and then release it.
Operating the window lock switch
12L011-2
Indicator light
With the window lock switch pressed in, only the driver’s
window can be raised or lowered.
The indicator lights on the switch tell you which of the switches can
be operated.

SWITCHES
30
Operating the windows from outside the vehicle
The windows can be operated using an ignition key.*
NOTE: *This feature can be set inoperative. Ask your Lexus
dealer for details.
12L0431
Insert the ignition key into the key hole on the driver’s side.
To close the windows: Turn the key in the locking direction and
hold it for a few seconds.
To open the windows: Turn the key in the unlocking direction and
hold it for a few seconds.
Jam protection function
During automatic raising operation, key off raising operation or
raising operation using the ignition key from the outside, the window
stops and is lowered if something gets caught between the window
and window frame.
If an impact is given to the window, this function may work without
anything caught.
CAUTION
Never try jamming any part of your body to make the jam
protection function work intentionally.
The jam protection function may not work when something
gets caught just before the window fully closed.

SWITCHES
31
CAUTION
To avoid serious personal injury, you must do the following.
Always make sure the head, hands and other parts of the
body of all occupants are kept completely inside the vehicle
before you close the power windows. If someone’s neck,
head or hands gets caught in a closing window, it could
result in a serious injury. When anyone closes the power
windows, be sure that they operate the windows safely.
When small children are in the vehicle, never let them use
the power window switches without supervision. Use the
window lock switch to prevent them from making
unexpected use of the switches.
Never leave small children alone in the vehicle, especially
with the ignition key still inserted. They could use the
power window switches and get trapped in a window.
Unattended children can become involved in serious
accidents.
EMERGENCY FLASHER SWITCH
12L0121
To turn on the emergency flashers, push the switch.
All the turn signal lights will flash. The emergency flashers will
work with the engine running or off and with or without the ignition
key.
Turn on the emergency flashers to warn other drivers if you must stop
your vehicle where it might be a traffic hazard.
Always pull your vehicle as far off the road as possible.
The turn signal light switch will not work when the emergency
flashers are in operation.
NOTICE
To prevent the battery from being discharged, do not leave the
switch on longer than necessary when the engine is not running.

SWITCHES
32
SEAT HEATER SWITCHES
12L0132
The seat heater has two switches one marked ”L” (for the left
seat) and the other marked ”R” (for the right seat). Push these
switches to turn the respective seat heater on, and push the
switches again to turn them off.
The ignition key must be in the ”ON” position.
CAUTION
Occupants must use caution when operating the seat heater
because it may make them feel too hot or cause burns at low
temperatures (erythema, varicella). Use extra caution for;
Baby, small child, elderly person, sick person or
handicapped person
Persons who have delicate skin
Persons who are exhausted
Persons who have taken alcohol or drugs which induce
sleep (sleeping drug, cold remedy, etc.)
To prevent the seat overheating, do not use the seat heater with
a blanket, cushion, or other insulating objects which cover the
seat.
NOTICE
Do not put unevenly weighted objects on the seat and do not
stick sharp objects (needles, nails, etc.) into the seat.
When cleaning the seats, do not use organic substances
(paint thinner, benzine, alcohol, gasoline, etc.). They may
damage the heater and seat surface.
To prevent the battery from being discharging, turn the
switches on when the engine is running.

SECTION 1 3
33
INSTRUMENTS AND CONTROLS
Gauges, meters and service reminder
indicators
Fuel gauge 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine coolant temperature gauge 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Odometer and trip meter 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service reminder indicators and warning buzzers 36. . . . . . . . . . . . . . . . .
Multi information display 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument panel light control 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GAUGES, METERS AND SERVICE REMINDER INDICATORS
34
FUEL GAUGE
13L0011
Low fuel level warning light
The gauge is displayed when the ignition switch is on and
indicates the approximate quantity of fuel remaining in the tank.
It is a good idea to keep the tank over 1/4 full.
If the fuel level approaches ”E” or the low fuel level warning light
comes on, fill the fuel tank as soon as possible.
On inclines or curves, due to the movement of fuel in the tank, the
fuel gauge needle may fluctuate or the low fuel level warning light
may come on earlier than usual.
If the fuel tank is completely empty, the malfunction indicator lamp
comes on. Fill the fuel tank immediately.
The indicator lamp goes off after driving several times. If the
indicator lamp does not go off, contact your Lexus dealer as soon as
possible.
See the inner back cover for fuel capacity and recommended fuelselection.
ENGINE COOLANT
TEMPERATURE GAUGE
13L0022
Normal range
The gauge indicates the engine coolant temperature when the
ignition switch is on. The engine operating temperature will
vary with changes in weather and engine load.
If the needle points to the red zone or higher, stop your vehicle and
allow the engine to cool.
Your vehicle may overheat during severe operating conditions, such
as:
Driving up a long hill on a hot day.
Reducing speed or stopping after high speed driving.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
35 Idling for a long period with the air conditioning on in
stopandgo traffic.
Towing a trailer.
NOTICE
Do not remove the thermostat in the engine cooling system as
this may cause the engine to overheat. The thermostat is
designed to control the flow of coolant to keep the
temperature of the engine within the specified operating
range.
Do not continue driving with an overheated engine. See ”If
your vehicle overheats” on page 196.
TACHOMETER
13L0031
The tachometer indicates engine speed in thousands of rpm
(revolutions per minute). Use it while driving to prevent engine
overrevving.
Driving with the engine running too fast causes excessive engine
wear and poor fuel economy. Remember, in most cases the slower
the engine speed, the greater the fuel economy.
NOTICE
Do not let the indicator needle get into the red zone. This may
cause severe engine damage.