1999 Lexus LS400 engine

SWITCHES
56
NOTICE
Do not put unevenly weighted objects on theseat and do not stick sharp objects (needles,nails, etc.) into the seat.
When cleaning the seats, do not use organicsubstances (paint thinner, benzine, alcohol,gasoline, etc.). They may damage the heaterand seat surface.
To prevent the battery from being discharging,turn the switches on when the engine isrunning.

SECTION 1 ± 3
57
INSTRUMENTS AND CONTROLS
Gauges, meters and service reminder
indicators
Fuel gauge57
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Engine coolant temperature gauge 59
. . . . . . . . . . . . . . .
Tachometer 60
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Odometer and trip meter 61
. . . . . . . . . . . . . . . . . . . . . . . .
Service reminder indicators and warning buzzers 62 . . .
Multi information display 70
. . . . . . . . . . . . . . . . . . . . . . . .
Instrument panel light control 79
. . . . . . . . . . . . . . . . . . . .
FUEL GAUGE
13L001±1

GAUGES, METERS AND SERVICE REMINDER INDICATORS
59
ENGINE COOLANT
TEMPERATURE GAUGE
13L002±2

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.
 Idling for a long period with the air conditioning on in stop±and±go 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 thetemperature of the engine within the specifiedoperating range.
Do not continue driving with an overheatedengine. See ºIf your vehicle overheatsº onpage 347.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
60
TACHOMETER
13L003±1
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.

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
72
W24

When the fuel gauge indicates around ºFº
W25W25

When the fuel gauge indicates around middle
W26

When the fuel gauge indicates around ºEº
Available driving distance with the remaining fuel is
calculated and displayed depending on the amount
of remaining fuel.
Average fuel consumption
W27W27
The average fuel consumption is calculated and
displayed based on the total driving distance and
the total fuel consumption with the engine running.
The value is updated every 10 seconds.
To calculate from the beginning, push the ºRESETº
button.Current fuel consumption
W28W28

GAUGES, METERS AND SERVICE REMINDER INDICATORS
73
The current fuel consumption is calculated and
displayed
based on the driving distance and the fuel
consumption for 2 seconds with the engine running.
The value is updated every 2 seconds.
If you are driving at low speeds just before stopping, the
accurate figure may not be shown.
 Average fuel consumption after being
refueled
W29W29
The average fuel consumption after being refueled
is calculated and displayed based on the total
driving distance and the total fuel consumption after
being refueled.
The value is updated every 10 seconds.
To calculate from the beginning, push the ºRESETº
button.
 Driving distance after being refueled
W30W30
The driving distance after being refueled is
displayed.Elapsed time
W31W31

GAUGES, METERS AND SERVICE REMINDER INDICATORS
74The total time during the engine running is
displayed.
When the engine is started again after the ignition is off,
the driving time is added to the previous value. Up to 99
hours 59 minutes can be displayed. When the driving
time exceeds 99 hours 59 minutes, the display returns
to 0 and recounting starts.
To count from the beginning, push the ºRESETº button.

Average vehicle speed
W32W32
The average vehicle speed is calculated and
displayed based on the total driving distance and
the total driving time with the engine running.
The displayed value is updated every 10 seconds.
To calculate from the beginning, push the ºRESETº
button.