2007 Lexus GS450h service

265
3-4. Using the hands-free system
3
Interior features
■When using the hands-free system
●The audio system and voice guidance are muted when making a call.
●If both parties speak at the same time it may be difficult to hear.
●If the received call volume is overly loud, an echo may be heard.
●Try to face the microphone as much as possible when speaking.
●In the following circumstances it may be difficult to hear the other party.
• When driving on unsealed roads
• When driving at high speeds
• If the window is open
• If the air-conditioning is blowing directly on the microphone
• If the air-conditioning is set to high
■Conditions under which the system will not operate
●If using a mobile phone that does not support Bluetooth®.
●If the mobile phone is switched off.
●If you are outside service range.
●If the mobile phone is not connected.
●If the mobile phone's battery is low.
■Bluetooth® antenna
The antenna is built into the display. If the m
obile phone is behind the seat or in the
console box, or touching or covered by metal objects, connection status may dete -
riorate.
■Battery charge/Signal status
This display may not correspond exact ly w
ith the mobile phone itself.

279
3-4. Using the hands-free system
3
Interior features
■To refuse a call
Touch and hold .
■ T
o adjust the received call volume
Press the or . You can also adjust th e v
olume using the steer-
ing switches.
Speaking on the phone
The following screen is displayed when speaking on the phone.
■ T
o adjust the received call volume
Press the or . You can also adjust th e v
olume using the steer-
ing switches.
■ T
o prevent the other party from hearing your voice
Touch the .
■ Inputting a k
ey
When using phone services such as an answ
ering service or a bank,
you can store phone numbers and code numbers in the phone book.
■International calls
Received international calls may not be disp
layed correctly, depending on the
mobile phone in use.

Maintenance and care4
343
4-1. Maintenance and care ......... 344Cleaning and protecting the 
vehicle exterior........................ 344
Cleaning and protecting the 
vehicle interior......................... 346
4-2. Maintenance ........................... 349 Maintenance 
requirements ............................ 349
General maintena nce .............. 351
Emission inspection and 
maintenance (I/M) 
programs ................................... 354 4-3. Do-it-yourself

maintenance......................... 355
Do-it-yourself service 
precautions ............................... 355
Hood .............................................. 358
Positioning the jack .................. 359
Engine compartment ................ 361
Tires ................................................. 375
Tire inflation pressure .............. 385
Wheels .......................................... 389
Air conditioning filter ............... 391
Electronic key battery ............. 393
Checking and replacing 
fuses ............................................. 395
Headlight aim ................................ 411
Light bulbs..................................... 413

349
4
Maintenance and care
4-2. Maintenance
Maintenance requirements
■Repair and replacement
It is recommended that genuine Lexus parts be used for repair to ensure perfor-
mance of each system. If non-Lexus parts are used in replacement or if a repair
sho
p other than a Lexus dealer performs repairs, confirm the warranty coverage.
To ensure safe and economical drivin g, day-to-day care and regular main-
tenance is essential. It is the owne r
’s responsibility to perform regular
checks. Lexus recommends the following maintenance.
■ General maintenance
Should be performed on a daily basis. This can be done b
y yourself
or by a Lexus dealer.
■ Scheduled maintenance
Should be performed at specified inter
vals according to the mainte -
nance schedule.
For details about maintenance items and schedules, refer to the “War -
ranty and Services Guide/Owner’ s Manual Supple
ment/Scheduled
Maintenance”.
■ Do-it-yourself maintenance
You can perform some maintenance procedures yourself. 
Please be aware that do-it-your self maintenance may af
fect war-
ranty coverage.
The use of Lexus service and repair manuals is recommended.
For details about warranty coverage, see the separate “Owner’s Guide”,
“W
arranty and Services Guide”, “Owner’s Manual Supplement” or
“Warranty Booklet”.

350
4-2. Maintenance
■Allow inspection and repairs to be performed by a Lexus dealer
●Lexus technicians are well-trained speciali sts and are kept up to date with the
latest service information. They are well informed about the operations of all
systems on your vehicle.
●Keep a copy of the repair order. It proves that the maintenance that has been
performed is under warranty coverage. If any problem should arise while your
vehicle is under warranty, your Lexus de aler will promptly take care of it.
CAUTION
■Warning in handling of battery, oils, fuels, and fluids
●Engine exhaust, some of its constituents, and a wide variety of automobile com-
ponents contain or emit chemicals known to the State of California to cause can-
cer and birth defects and other reproductive harm. Work in a well ventilated area.
●Oils, fuels and fluids contained in vehicles as well as waste produced by compo-
nent wear contain or emit chemicals known to the State of California to cause
cancer and birth defects or other reproductive harm. Avoid exposure and wash
any affected area immediately.
●Battery posts, terminals and related accessories contain lead and lead com-
pounds which are known to cause brain damage. Wash your hands after han-
dling. (P. 3 7 1 )
●Used engine oil contains chemicals that have been shown to cause cancer in lab-
oratory animals. Avoid prolonged and repeated contact. Always protect your
skin by washing thorough ly with soap and water.

351
4-2. Maintenance
4
Maintenance and care
General maintenance
Engine compartment
Luggage compartment
ItemsCheck points
Brake fluid• At the correct level? (P. 3 7 0 )
Engine/inverter coolant• At the correct level? ( P. 3 6 8 )
Engine oil• At the correct level? ( P. 3 6 3 )
Exhaust system• No fumes or strange sounds?
Radiator/condenser/hoses• Not blocked with foreign matter? 
( P. 3 6 9 )
Wa s h e r f l u i d• At the correct level? ( P. 3 74 )
ItemsCheck points
12 volt battery• Maintenance-free ( P. 3 7 1 )
Listed below are the general maintenance items that should be performed
at the intervals specified in the “Warranty and Services Guide/Owner’s
Manual Supplement”. It is recommend ed that any problem you notice
should be brought to the attention of your Lexus dealer or qualified service
shop for advice.

354
4-2. Maintenance
Emission inspection and maintenance (I/M) programs
Some states have vehicle emission inspection programs which include
OBD (On Board Diagnostics) checks. The OBD system monitors the oper
-
ation of the emission control system.
■ If the malfunction indicator lamp comes on
The OBD system determines that a pr
oblem exists somewhere in
the emission control system. Your vehicle may not pass the I/M test
and may need to be repaired. Contact your Lexus dealer to service
the vehicle.
■ Y
our vehicle may not pass the I/M test:
●When the 12 v
olt battery is disconnected or discharged
Readiness codes that are set during ordinary driving are erased. 
Also, depending on your driving habits, the r
eadiness codes may
not be completely set.
● When the fuel tank cap is loose
The malfunction indicator lamp comes on as a tempor
ary mal-
function and your vehicle may not pass the I/M test.
■ When the malfunction indicator la mp goes off after se
veral driv-
ing trips
The error code in the OBD system will not be clear
ed unless the
vehicle is driven 40 or more times.
■ If y
our vehicle does not pass the I/M test
Contact your Lexus dealer to prep ar
e the vehicle for re-testing.

355
4
Maintenance and care
4-3. Do-it-yourself maintenance
Do-it-yourself service precautions
If you perform maintenance yourself, be sure to follow the correct proce-
dure given in these sections.
ItemsPa r t s a n d t o o l s
12 volt battery condition (P. 3 7 1)
•Grease
• Conventional wrench 
(for terminal clamp bolts)
Brake fluid level ( P. 3 7 0 )
• FMVSS No.116 DOT 3 or SAE
J1703 brake fluid
•Rag or paper towel
• Funnel (used only for adding brake
fluid)
Engine/inverter coolant level 
( P. 3 6 8 )
• “Toyota Super Long Life Coolant”
or similar high quality ethylene gly-
col based non-silicate, non-amine,
non-nitrate and non-borate coolant
with long-life hybrid organic acid
technology.
For the U.S.A.: 
“Toyota Super Long Life Coolant”
is pre-mixed with 50% coolant and
50% deionized water.
For Canada: 
“Toyota Super Long Life Coolant”
is pre-mixed with 55% coolant and
45% deionized water.
• Funnel (used only for adding cool- ant)