lexus LS400 1994 Keys and Doors / 1994 LS400: GAUGES, METERS AND SERVICE REMINDER INDICATORS

SECTION 1 – 3
25
INSTRUMENTS AND CONTROLS
Gauges, meters and service reminder
indicators
Fuel gauge26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine coolant temperature gauge26 . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer
27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Odometer and trip meter
27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service reminder indicators and warning buzzers28 . . . . . . . . . . . . . .
Outside temperature display33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument panel light control34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GAUGES, METERS AND SERVICE REMINDER INDICATORS
26
FUEL GAUGE
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.
This fuel gauge has a non-return type needle which remains
at the last indicated position when the ignition switch is turned
off.
If the fuel level approaches “E” or the low fuel level warning light
comes on, fill the fuel tank as soon as possible.
See the inner back cover for fuel capacity and recommended
fuel selection.
ENGINE COOLANT
TEMPERATURE GAUGE
Overheating
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.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
27
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 152.
TACHOMETER
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.
ODOMETER AND TRIP METER
This meter displays the odometer and two trip meters. To
change the mode indication, push the “ODO” or “TRIP
A / B” button.
The odometer records the total distance the vehicle has
been driven. The twin trip meter records two different
distances independently.
For example, you can use one meter to calculate the fuel
economy and the other to measure the distance on each trip.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
28To change the trip meter indication from one trip to the
other, push the “TRIP A / B” button. To set the A trip meter
to zero, display the A meter reading, then push the
“RESET” button. The same applies for the B trip meter.
The data of trip meters will be cancelled if the electrical power
source is disconnected.
SERVICE REMINDER INDICATORS
AND WARNING BUZZERS
IF THIS INDICATOR OR
BUZZER COMES ON...DO THIS.
(a) If parking brake is off,
stop and check.
(b) Take vehicle to Lexus
dealer.
(c) Fasten seat belts.
(Indicator and buzzer)
(d) Take vehicle to Lexus
dealer immediately.
(e) Stop and check.
(f) Add engine oil.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
29 (g) Add engine oil.
(h) Take vehicle to Lexus
dealer.
(i) Take vehicle to Lexus
dealer.
(j) Close all doors.
(k) Replace bulb.
(l) Add engine coolant.
(m) Take vehicle to Lexus
dealer.
(n) Take vehicle to Lexus
dealer.(o) Add washer fluid.
(p) Low fuel level Fill up tank.
warning light
(q) Key reminder buzzer Remove key.
(r) Moon roof Close moon roof.
reminder buzzer
(a) Brake System Warning Light
This light has the following two functions:
Parking brake reminder
If this light is on, make sure the parking brake is fully released.
The light should go off.
Low brake fluid level warning
If this light comes on and stays on while you are driving, slow
down and pull off the road. Then stop the vehicle carefully.
Remember that stopping distance and pedal effort may be
increased. There may be a problem somewhere in the brake
system. Check the fluid level of the see-through reservoir.
To make sure the parking brake has not caused the warning
light to come on, check to see that the parking brake is fully
released.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
30If the brake fluid level is low...
At a safe place, test your brakes by starting and stopping.

If you judge that the brakes still work adequately, drive
cautiously to your nearest dealer or shop for repairs.

If the brakes are not working, have the vehicle towed in for
repairs. (For towing information, see page 159.)
CAUTION:
It is dangerous to continue driving normally when the
brake fluid level is low.
If the brake fluid level is correct...
Have the warning system checked by your Lexus dealer.
(b) Brake Pad Wear Limit Warning Light
This light warns that the brake pads are worn to the extent that
replacement is required. If it comes on while you are driving,
have the brake pads checked and replaced by your Lexus
dealer as soon as possible.
(c) Seat Belt Reminder Light and Buzzer
Once the ignition key is turned to “ON” or “START”, the
reminder light and buzzer come on if the driver’s seat belt is not
fastened. Unless the driver fastens the belt, the light stays on
and the buzzer stops after about 4 to 8 seconds.
(d) SRS Warning Light
This indicator comes on when the ignition key is turned to
the “ACC” or “ON” position. It goes off after about 6
seconds. This means the SRS is operating properly.
The SRS warning light system monitors the front airbag
sensors, center airbag sensor assembly, 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, or remains
on.

The light comes on while driving.
(e) Discharge Warning Light
This light warns that the battery is being discharged.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
31 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 OK, 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) Low 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 198.)
NOTICE:
Continued engine operation with low engine oil will
damage the engine.
(h) Malfunction Indicator Lamp
This lamp warns that there is a problem somewhere in your
engine electrical system.
If it comes on while you are driving, have your vehicle
checked / repaired by your Lexus dealer as soon as possible.
(i) Anti-lock Brake System Warning Light
This light warns that there is a problem somewhere in your
anti-lock brake system. When the anti-lock brake system
warning light is on (and the brake system warning light is off),
the brake system operates conventionally but without anti-lock
function.
If the light comes on while you are driving, have your vehicle
checked by your Lexus dealer as soon as possible.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
32
(j) Open Door Warning Light
This light remains on until all the doors are completely closed.
(k) Rear Light Failure Warning Light
If this light comes on when the headlight switch is turned on (at
the first or second clickstop), it indicates that one or more of the
tail lights are burned out.
If it comes on when the brake pedal is depressed, one or more
stop lights are burned out.
Have defective bulbs replaced as soon as possible.
(l) Low Engine Coolant Level Warning Light
This light warns that the engine coolant level is low.
Add coolant into the reservoir as soon as possible. (For
instructions, see “Checking the engine coolant level” on page
200.)
NOTICE:
Continued driving with low coolant will cause the engine
to overheat.
(m) Traction Control System Indicator /
Warning Light
This light comes on when the ignition key is turned to “ON”, and
will go off after about three seconds. When the traction control
system operates during driving, the light blinks. If the light
remains on, this indicates a problem which should be checked
by your Lexus dealer.
(n) Traction Control System Off Indicator /
Warning Light
This light comes on when the ignition key is turned to “ON”, and
will go off after three seconds. This means that the system is
operating properly.
If the light remains on when the switch is turned on, this
indicates a malfunction in the anti-lock brake system or engine
system. Contact your Lexus dealer as soon as possible to
service the vehicle.
(o) Low Washer Fluid Warning Light
This light comes on when the fluid level in the tank becomes
nearly empty. Fill the tank as soon as possible.
(p) Low Fuel Level Warning Light
This light comes on when the fuel level in the tank becomes
nearly empty. Fill the tank as soon as possible.
(q) Key Reminder Buzzer
This buzzer reminds you to remove the key when you open the
driver’s door with the ignition key in the “ACC” or “LOCK”
position.
(r) Moon Roof Reminder Buzzer
If you turn the ignition key to the “ACC” or “LOCK” position with
the moon roof still tilted up, this buzzer sounds as a reminder
when a front door is opened or about sixty seconds after the
ignition key is turned to the “ACC” or “LOCK” position.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
33
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 “ACC”.
The following service reminder indicator should come on. It
goes off after 6 seconds.
4. Turn the ignition key to “ON”.
The following service reminder indicators should come on.
The following service reminder indicators go off after 3 seconds.
5. Turn the ignition key to “START”.
The following service reminder indicators should come on.
If any service reminder indicator or warning buzzer does not
function, either the bulb is burned out or circuit is in need of
repair. Have it checked by your Lexus dealer as soon as
possible.
OUTSIDE TEMPERATURE
DISPLAY
This display shows the outside temperature when the
ignition switch is on.
The displayed temperature ranges from −30C (−22F) up to
50C (122F). If the temperature does not appear on the
display or it shows “− − −”, take your vehicle to your Lexus
dealer.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
34
INSTRUMENT PANEL LIGHT
CONTROL
To adjust the brightness of the instrument panel lights,
turn the knob.