Lexus IS F 2010 Audio/video System / LEXUS 2010 IS F OWNERS MANUAL (OM53A21U)

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4-3. Do-it-yourself maintenance
4
Maintenance and care
■Adding fluid
Make sure to check the fluid type and prepare the necessary items.
Fluid typeFMVSS No.116 DOT 3 or SAE J1703 brake fluid
ItemsClean funnel
■Brake fluid can absorb moisture from the air
Excess moisture in the fluid can cause a dangerous loss of braking efficiency. Use
only newly opened brake fluid.
CAUTION
■When filling the reservoir
Take care because brake fluid can harm your hands or eyes and damage painted
surfaces.
If fluid gets on your hands or in your eyes, flush the affected area with clean water
immediately.
If you still experience discomfort, see a doctor.
NOTICE
■If the fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads wear or
when the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, it may indicate a serious problem.

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4-3. Do-it-yourself maintenance
Battery
Check the battery as follows.
■Battery exterior
Make sure that the battery terminals are not corroded and that there
are no loose connections, cracks, or loose clamps.
Terminals
Hold-down clamp
Ground cable
■Checking battery condition (vehicles with the battery indicator)
Check the battery condition using the indicator color.
Blue: Good condition
Red: Not working properly.
Have the battery checked by
your Lexus dealer.
White: Charging is necessary.
Have the vehicle inspected by
your Lexus dealer.

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4-3. Do-it-yourself maintenance
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Maintenance and care
■Before recharging
When recharging, the battery produces hydrogen gas which is flammable and
explosive. Therefore, before recharging:
●If recharging with the battery installed on the vehicle, be sure to disconnect the
ground cable.
●Make sure the power switch on the charger is off when connecting and discon-
necting the charger cables to the battery.
■After recharging/reconnecting the battery
In some cases, the engine may not start. Follow the procedure below to initialize the
system.
Shift the shift lever to “P”, and turn the “ENGINE START STOP” switch
OFF.
Open and close any of the doors.
Start the engine. (If the engine does not start first time, repeat the proce-
dure.)
If the engine will not start even after multiple attempts at the above method, contact
your Lexus dealer.
CAUTION
■Chemicals in the battery
A battery contains poisonous and corrosive sulfuric acid and may produce hydro-
gen gas which is flammable and explosive. To reduce the risk of death or serious
injury, take the following precautions while working on or near the battery:
●Do not cause sparks by touching the battery terminals with tools.
●Do not smoke or light a match near the battery.
●Avoid contact with eyes, skin and clothes.
●Never inhale or swallow electrolyte.
●Wear protective safety glasses when working near the battery.
●Keep children away from the battery.
STEP1
STEP2
STEP3

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4-3. Do-it-yourself maintenance
CAUTION
■Where to safely charge the battery
Always charge the battery in an open area. Do not charge the battery in a garage or
closed room where there is not sufficient ventilation.
■How to recharge the battery
Only perform a slow charge (5 A or less). The battery may explode if charged at a
quicker rate.
■Emergency measures regarding electrolyte
●If electrolyte gets in your eyes
Flush your eyes with clean water for at least 15 minutes and get immediate medi-
cal attention. If possible, continue to apply water with a sponge or cloth while
traveling to the nearest medical facility.
●If electrolyte gets on your skin
Wash the affected area thoroughly. If you feel pain or burning, get medical atten-
tion immediately.
●If electrolyte gets on your clothes
It can soak through clothing on to your skin. Immediately take off the clothing and
follow the procedure above if necessary.
●If you accidentally swallow electrolyte
Drink a large quantity of water or milk. Follow with milk of magnesia, beaten raw
egg or vegetable oil. Get emergency medical attention immediately.
NOTICE
■When recharging the battery
Never recharge the battery while the engine is running. Also, be sure all accesso-
ries are turned off.

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4-3. Do-it-yourself maintenance
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Maintenance and care
Washer fluid
If any washer does not work or the
warning message appears on the
multi-information display, the
washer tank may be empty. Add
washer fluid.
CAUTION
■When adding washer fluid
Do not add washer fluid when the engine is hot or running, as washer fluid contains
alcohol and may catch fire if spilled on the engine etc.
NOTICE
■Do not use any fluid other than washer fluid
Do not use soapy water or engine antifreeze instead of washer fluid.
Doing so may cause streaking on the vehicle’s painted surfaces.
■Diluting washer fluid
Dilute washer fluid with water as necessary.
Refer to the freezing temperatures listed on the washer fluid tank.

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4-3. Do-it-yourself maintenance
Tires
Installing tire inflation pressure warning valves and transmitters
When replacing tires or wheels, tire pressure warning valves and trans-
mitters must also be installed.
When new tire pressure warning valves and transmitters are installed,
new tire pressure warning valve and transmitter ID codes must be regis-
tered in the tire pressure warning computer and the tire pressure warning
system must be initialized. Have tire pressure warning valve and transmit-
ter ID codes registered by your Lexus dealer. (P. 389)
Replace tires in accordance with maintenance schedules and tread wear.
■Checking tires
New tread
Treadwear indicator
Worn tread
The location of treadwear indi-
cators is shown by the “TWI” or
“ ” marks, etc., molded on the
sidewall of each tire.
■The tire pressure warning system
Your Lexus is equipped with a tire pressure warning system that uses
tire pressure warning valves and transmitters to detect low tire infla-
tion pressure before serious problems arise. (P. 444, 453)

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4-3. Do-it-yourself maintenance
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Maintenance and care
Initializing the tire pressure warning system
■The tire pressure warning system must be initialized when the tire
inflation pressure is changed (such as when changing traveling
speed.)
When the tire pressure warning system is initialized, the current tire
inflation pressure is set as the benchmark pressure.
■How to initialize the tire pressure warning system
To initialize the system, use the satellite switch. (P. 319)
Park the vehicle in safe place and turn the “ENGINE START
STOP” switch to OFF.
While the vehicle is moving, initialization is not performed.
Adjust the tire inflation pressure to the specified cold tire inflation
pressure level. (P. 4 9 8 )
Make sure to adjust the tire pressure to the specified cold tire inflation
pressure level. The tire pressure warning system will operate based on
this pressure level.
Turn the “ENGINE START STOP” switch to IGNITION ON
mode.
STEP1
STEP2
STEP3

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4-3. Do-it-yourself maintenance
The tire inflation pressure initial-
ization setting display
Continue to press “” or “” until
the initialization setting display
appears.
It may take several minutes to com-
plete the setting. Wait for several
minutes before turning the
“ENGINE START STOP” switch to
OFF if necessary.
Recording tire inflation pressure
settings
Press and hold the “ON/OFF” but-
ton until the tire pressure warning
light blinks slowly 3 times and the
message “PRESSURE INITIAL”
showing that the initial setting is
complete is displayed on the multi-
information display.
Wait for a few minutes with the IGNITION ON mode, and then
turn the “ENGINE START STOP” switch to OFF.
STEP4
STEP5

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4-3. Do-it-yourself maintenance
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Maintenance and care
Registering and selecting ID codes
To select tire pressure warning valve and transmitter ID codes, use the
satellite switch. (P. 3 1 9 )
■Registering ID codes
2 sets of tire pressure warning valve and transmitter ID codes can be
registered. Once a second set of tires is registered at “2ND”, you can
switch between tire set settings simply by pressing the “ON/OFF” but-
ton.
There are 2 settings:
“MAIN” position: The ID code of the tire pressure warning valve and
transmitter on the tires originally installed on the
vehicle is registered.
“2ND” position: The ID code is not registered. When you replace a
new set of tires, purchase tire pressure warning
valves and transmitters from your Lexus dealer and
have the new ID code registered by your Lexus
dealer.

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4-3. Do-it-yourself maintenance
■Selecting ID codes
When replacing tires, make sure to select the ID code set that matches
the new tire set. If the ID code is set to the wrong tire setting, the tire
pressure warning system will not operate properly. After driving for
about 20 minutes, the tire pressure warning light comes on after blink-
ing for 1 minute to indicate a system malfunction.
Tire pressure warning valve and
transmitter ID code settings dis-
play
Press “” or “” repeatedly until
the setting display appears.
Switching ID codes
Press the “ON/OFF” button to
switch between “MAIN” and
“2ND” ID codes.