service LEXUS LS430 2005 User Guide

GAUGES, METERS AND SERVICE REMINDER INDICATORS
85
(b) Driver’s Seat Belt Reminder Light andBuzzer
The light and buzzer act as a reminder to have the driver buckle
up the seat belt.
Once the ignition switch is turned to “ON” or “START”, the
reminder light flashes and buzzer sounds if the driver’s seat
belt is not fastened. Unless the driver fastens the belt, the light
continues flashing and the buzzer stops after about 4 to 8
seconds.
(c) Front Passenger’s Seat Belt ReminderLight
The light acts as a reminder to have the front passenger buckle
up the seat belt.
Once the ignition switch is turned to “ON” or “START”, 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 continues flashing.
However, if a front passenger uses an additional seat cushion,
the indicator light may not flash even when the seat belt is not
buckled up.
If luggage or other load is placed on the front passenger seat,
depending on its weight and how it is placed on the seat, the
built−in sensor in the seat cushion may detect the pressure,
causing the reminder light to flash.
(d) SRS Warning Light
The indicators come on when the ignition switch is turned
to the “ON” position. It goes off after about 6 seconds.
This means the SRS airbags and seat belt pretensioners
are operating properly.
This warning light system monitors the airbag sensor
assembly, front airba g sensors, side and curtain shield airbag
sensor assemblies, curtain shield airbag sensor assemblies,
driver’s seat position sensor, driver’s seat belt buckle switch,
occupant detection sensor, front passenger’s seat belt buckle
switch, seat belt pretensioner assemblies, inflators, warning
light, interconnecting wiring and power sources.
If any 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.
 When the ignition switch is turned to the “ON” position, the
light does not come on or remains on for more than 6
seconds.
 The light comes on while driving.
If the light stays on, it indicates that the SRS driver and front
passenger airb ags, SRS side and curtain shield airbags and/or
seat belt pretensioners have a problem.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
86
(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 when the ignition switch is turned to
the “ON” 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 following:
 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 does 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.
If this lamp comes on and engine speed does not increase
when the accelerator pedal is depressed, there may be a
problem somewhere in the electronic throttle control system.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
87
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 switch is
turned to “ACC” or “LOCK” position.
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 “Emissions inspection and maintenance (I/M)
programs” on page 431.
(g) Master Warning Light
If any system malfunctions, this warning light comes on or
flashes together with a warning tone, and a warning message
appears in the multi−information display. When the cause of
the problem is eliminated, the warning tone and message on
the display will turn off.
(h) “ABS” Warning Light
The light comes on when the ignition switch is turned to the
“ON” 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 “ABS” 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 “ABS” 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.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
88If any of the following conditions occurs, this indicates a
malfunction
somewhere in the components 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 switch is
turned to the “ON” position, or remains on.
 The light comes on while you are driving.
A warning light turning on briefly during operation does not
indicate a problem.
CAUTION
If the “ABS” warning light remains on together with the
brake system warning light, immediately stop your
vehicle at a safe place and contact your Lexus dealer.
In this case, not only the antilock brake system will fail
but also the vehicle will become extremely unstable
during braking.
(i) Open Door Warning Light
This light remains on until all the doors are completely closed.
(j) 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.
(k) Key Reminder Buzzer
This buzzer acts as a reminder to remove the key when you
open the driver’s door with the ignition key in the “ACC” or
“LOCK” position.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
89
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 switch to “ON”.
The following service reminder indicators should come on.

W287
or

or
or
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The following service reminder indicator goes off after a few
seconds.

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or
The following service reminder indicator goes off after 6
seconds.
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.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
90
MULTIINFORMATION DISPLAY
13L146
The multiinformation display provides various
information, including your vehicle’s driving condition,
outside temperature, and warning messages if your
vehicle is in trouble.
During ordinary driving, cruise information and graphic
information are displayed. However, if any problem
occurs in your vehicle, a warning message appears above
the cruise information.
(a) Cruise information
13L197
 1 “DISP1” button 2“DISP2” button
3“RESET” button
The following information is shown with the ignition
switch turned on. Each time you push the “DISP1” button,
the displayed information is changed.
 Available driving distance
 Average fuel consumption
 Current fuel consumption
 Average fuel consumption after being refueled
 Driving distance after being refueled
 Elapsed time
 Average vehicle speed
 Blank

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The displayed cruise information values indicate the general
driving
condition and may not always reflect precise and actual
conditions.
 Available driving distance
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When the fuel gauge is close to “F”
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When the fuel gauge is close to middle
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When the fuel gauge is close to “E”
The available driving distance is calculated and displayed
depending on the amount of remaining fuel.
 Average fuel consumption
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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 begin recalculating, push the “RESET” button for about 1 to
2 seconds.
 Current fuel consumption
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The current fuel consumption is calculated and displayed
based on the driving distance and the fuel consumption
per 2 second interval 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 refueling
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The average fuel consumption after refueling is
calculated and displayed based on the total driving
distance and the total fuel consumption after refueling.
The value is updated every 10 seconds.
When refueling, be sure to stop your vehicle and turn the
ignition switch off.
The average fuel consumption could not be calculated in either
of the following cases:
 Refueled by opening the fuel filler door using the manual
lever in the trunk
 Refueled with a small quantity of gasoline
To begin recalculating, push the “RESET” button for about 1 to
2 seconds.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
92The multi−
information display shows “Tank Avg –.– MPG” for
a while after refueling or pushing the “RESET” switch, and then
shows the previous average fuel consumption until you start
the vehicle.
 Driving distance after refueling
w250
The driving distance after refueling is displayed.
When refueling, be sure to stop your vehicle and turn the
ignition switch off.
The driving distance after refueling could not be calculated in
either of the following cases:
 Refueled by opening the fuel filler door using the manual
lever in the trunk
 Refueled with a small quantity of gasoline
To begin recalculating, push the “RESET” button for about 1 to
2 seconds.
 Elapsed time
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The total time that the engine has been 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 begin recalculating, push the “RESET” button for about 1 to
2 seconds.
 Average vehicle speed
w252
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 begin recalculating, push the “RESET” button for about 1 to
2 seconds.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
93
(b) Graphic information
13L147
The following graphic information is shown on the
display.
Any door open
 Compass display (if equipped)
 Outside temperature display
 Lexus park assist system display (if equipped)
 Dynamic radar/laser cruise control display (if equipped)
 Blank
If any door is opened, the warning message also reminds you
to close the door. When the ignition is turned on, the previously selected display
appears. Each time you push the “DISP2” button for about 1
to 2 seconds, the display changes from compass (if the
compass is
initially displayed) to outside temperature to blank
screen, then back to compass.
For the compass, see “Compass” on page 105. For the outside
temperature display, see “Outside temperature display” on
page 117.
If you push the main switch of the Lexus park assist system or
turn the ignition on with the main switch of the Lexus park assist
system on, the Lexus park assist system screen appears for
2 seconds and then the multi −information display returns to the
previous screen.
When you push the main switch of the dynamic radar/laser
cruise control, the dynamic radar/laser cruise control screen
appears. Each time you push the “DISP2” switch for 1 to 2
seconds, the screen changes to compass, outside
temperature display, blank screen, and then back to the
dynamic radar/laser cruise control screen. When the display
shows a screen other than dynamic radar/laser cruise control,
the multi −information display returns to the dynamic
radar/laser cruise control screen after 6 seconds. For details,
see “Dynamic radar/laser cruise control” on page 329.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
94
(c) Warning messages
13L148
W40W253
When the engine oil pressure becomes too low, the
master warning light comes on, a warning tone sounds
and the above message appears.
If this message appears 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 message may appear 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 while this warning message is
displayed even for one block. It may ruin the engine.
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When your brake pads have worn down enough to require
replacement, the master warning light flashes and a
warning tone sounds and the above message appears.
If this message appears while you are driving, have the brake
pads checked and replaced by your Lexus dealer as soon as
possible.
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When the engine oil level is too low, the master warning
light flashes, a warning tone sounds, and the above
message appears.
Add oil as soon as possible. (For instructions, see “Checking
the engine oil level” on page 452.)
While driving on steep inclines or rough roads which causes
the vehicle to substantially sway or on curves, this message
may appear due to the movement of engine oil in the engine.