2003 Lexus GS300 service indicator

GAUGES, METERS AND SERVICE REMINDER INDICATORS
45
(f) Low Engine 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 ºChecking the engine
oil levelº on page 260.)
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.
In normal conditions, due to engine oil consumption, this light
may come on earlier than the specified service interval of the
scheduled maintenance. This is because the engine oil is
consumed to the low level within the scheduled maintenance
interval and does not indicate a problem. (For detailed
information, see ªFacts about engine oil consumptionº on page
258.)
NOTICE
Continued engine operation with low engine oil will
damage the engine.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
46
(h) Malfunction Indicator Lamp
This lamp comes on when the ignition key is turned to the
ªONº position and goes off after the engine starts. This
means that the warning light system is operating properly.
If the lamp remains on, or the lamp comes on while
driving, first check the followings:
Empty fuel tank
If the fuel tank is empty, refuel immediately.
Loose fuel tank cap
If the fuel tank cap is loose, securely tighten it.
These cases are temporary malfunctions. The malfunction
indicator lamp will go off after taking several driving trips.
If the lamp will not go off even after several trips, contact your
Lexus dealer as soon as possible.
If the fuel tank is not empty or the fuel tank cap is not
loose...
There is a problem somewhere in the engine, emission
control system, electronic throttle control system, automatic
transmission electrical system or warning light system itself.
Contact your Lexus dealer as soon as possible to service the
vehicle.GS430
If this lamp comes on and the engine speed does not increase
with the accelerator pedal depressed, there may be a problem
somewhere in your electronic throttle control system.
At this time, vibration may occur. However, if you depress the
accelerator pedal more firmly and slowly, you can drive your
vehicle at low speeds. Have your Lexus checked by your
Lexus dealer as soon as possible.
Even if the abnormality of the electronic throttle control system
is corrected during low speed driving, the system may not be
recovered until the engine is stopped and the ignition key is
turned to ªACCº or ªLOCKº position.
GS300
If this lamp comes on and the engine speed does not increase
with the accelerator pedal depressed down to about the middle
position, there may be a problem somewhere in your electronic
throttle control system.
At this time, if you depress the accelerator pedal more firmly
and slowly, you can drive your vehicle at low speeds. Have
your Lexus checked by your Lexus dealer as soon as possible.
Even if the abnormality of the electronic throttle control system
is corrected during low speed driving, the system may not be
recovered until the engine is stopped and the ignition key is
turned to ªACCº or ªLOCKº position.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
47 Emissions inspection and maintenance (I/M) programs
Your vehicle may not pass a state emission inspection if the
malfunction indicator lamp remains on. Contact your Lexus
dealer to check your vehicle's emission control system and
OBD (On±Board Diagnostics) system before taking your
vehicle for the inspection.
For details, see ªEmissions inspection and maintenance (I/M)
programsº on page 239.
(i) ºABSº Warning Light
The light comes on when the ignition key is turned to the ªONº
position. If the anti±lock brake system and the brake assist
system work properly, the light turns off after a few seconds.
Thereafter, if either of the systems malfunctions, the light
comes on again.
When the ªABSº warning light is on (and the brake system
warning light is off), the anti±lock brake system, the brake
assist system, the traction control system and/or the vehicle
stability control system do/does not operate, but the brake
system still operates conventionally.
When the ªABSº warning light is on (and the brake system
warning light is off), the anti±lock brake system does not
operate so that the wheels could lock up during a sudden
braking or braking on slippery road surfaces.
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 when the ignition key is turned
to the ªONº position, or remains on.
The light comes on while you are driving.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
48A warning light turning on briefly during operation does not
indicate a problem.
Either of the following conditions may occur, but do not
indicate the malfunction:
The light may stay on for about 60 seconds after the ignition
key is turned to the ªONº position. It is normal if it turns off
after a while.
Depressing the brake pedal repeatedly may turn on the
light. It is normal if it turns off after a few seconds.
(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 Washer Fluid Warning Light
This light comes on when the fluid level in the tank becomes
very low. Fill the tank as soon as possible.
(m) Low Fuel Level Warning Light
This light comes on when the fuel level in the tank becomes
very low. Fill 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.
(n) Automatic Headlight Leveling System
Warning Light
This light warns that there is a problem somewhere in the
automatic headlight leveling system.
If it comes on, have your vehicle checked by your Lexus dealer.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
49
(o) Vehicle Stability Control System Warning
Lights
These lights warn that there is a problem somewhere in the
vehicle stability control system or traction control system.
If the ºVSCº warning light and ºVSC OFFº indicator light come
on, have your vehicle checked by Lexus dealer as soon as
possible.
The lights will come on when the ignition key is turned to ºONº,
and will go off after about a few seconds.
The lights may stay on for 60 seconds after the ignition key is
turned to the ªONº position. It is normal if they go out after a
while.
Depressing the brake pedal repeatedly may turn on the lights.
It is normal if they go out after a few seconds.
If the ºVSCº warning light and ºVSC OFFº indicator light come
on, the vehicle stability control system does not activate,
however, it is no problem to continue your driving.
(p) 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 ºONº.
The following service reminder indicators should come on.


or

or
or

GAUGES, METERS AND SERVICE REMINDER INDICATORS
50The following service reminder indicators go off after a few
seconds.

or

The following service reminder indicator goes off after about 6
seconds.
The lights other than the slip indicator light may stay on for
about 60 seconds after the ignition key is turned to the ªONº
position. It is normal if they go out after a while.
If any service reminder indicator or warning buzzer does not
function as described above, have it checked by your Lexus
dealer as soon as possible.
INSTRUMENT PANEL LIGHT
CONTROL
13G005
The brightness of the instrument panel lights is
automatically adjusted depending on the brightness of
your surroundings. To adjust the brightness as you like,
turn the knob. However, if the brightness is automatically
adjusted at the maximum, turning the knob cannot change
the brightness.
When the headlight switch is in the first or second click stop,
you can also adjust the brightness of the displays on the audio
and air conditioning systems using this knob.