2012 Lexus IS220d roof

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5. GPS (GLOBAL POSITIONING SYSTEM)
3
NAVIGATION SYSTEM
ISF_IS_ISC_Navi_EE
Accurate current position may not be
shown in the following cases:
• When driving on a small angled Y-
shaped road.
• When driving on a winding road.
• When driving on a slippery road such
as in sand, gravel, snow, etc.
• When driving on a long straight road.
• When motorway and surface streets
run in parallel.
• After moving by ferry or vehicle car-
rier.
• When a long route is searched during
high speed driving.
• When driving without setting the cur-
rent position calibration correctly.
• After repeating a change of direction
by going forward and backward, or
turning on a turntable in a parking lot.
• When leaving a covered parking lot or
parking garage.
• When a roof carrier is installed.
• When driving with tyre chains
installed.
• When the tyres are worn.
• After replacing a tyre or tyres.
• When using tyres that are smaller or
larger than the factory specifications.
• When the tyre pressure in any of the 4
tyres is not correct.Inappropriate route guidance may
occur in the following cases:
• When turning at an intersection off
the designated route guidance.
• If you set more than 1 destination but
skip any of them, auto reroute will
display a route returning to the desti-
nation on the previous route.
• When turning at an intersection for
which there is no route guidance.
• When passing through an intersection
for which there is no route guidance.
• During auto reroute, the route guid-
ance may not be available for the next
turn to the right or left.
• During high speed driving, it may
take a long time for auto reroute to
operate. In auto reroute, a detour route
may be shown.
• After auto reroute, the route may not
be changed.
• If an unnecessary U-turn is shown or
announced.
• If a location has multiple names and
the system announces 1 or more of
them.
• When a route cannot be searched.
• If the route to your destination
includes gravel, unpaved roads or
alleys, the route guidance may not be
shown.
• Your destination point might be
shown on the opposite side of the
street.
• When a portion of the route has regu-
lations prohibiting the entry of the
vehicle that vary by time or season or
other reasons.
• The road and map data stored in the
navigation system may not be com-
plete or may not be the latest version.
If the vehicle cannot receive GPS sig-
nals, the current position can be
adjusted manually. For information
on setting the current position cali-
bration, see page 127.

144
1. TELEPHONE OPERATION
ISF_IS_ISC_Navi_EE
IS F (right-hand drive vehicles)
IS250C (left-hand drive vehicles)INFORMATION
The other party’s voice will be heard
from the front speakers. The audio/
video system will be muted during
telephone calls or when hands-free
speech commands are used.
Talk alternately with the other party
on the telephone. If both parties speak
at the same time, the other party may
not hear what has been said. (This is
not a malfunction.)
Keep call volume down. Otherwise,
the other party’s voice may be audible
outside the vehicle and voice echo
may increase. When talking on the
telephone, speak clearly towards the
microphone.
The other party may not hear you
clearly when:
• Driving on an unpaved road. (Mak-
ing excessive traffic noise.)
• Driving at high speeds.
• The roof or windows are open.
• The air conditioning vents are
pointed towards the microphone.
• The sound of the air-conditioning
fan is loud.
• There is a negative effect on sound
quality due to the telephone and/or
network being used.

284
1. SPEECH COMMAND SYSTEM OPERATION
ISF_IS_ISC_Navi_EE
IS F/IS250 (left-hand drive vehicles)
IS F (right-hand drive vehicles)
IS250C (left-hand drive vehicles)
MICROPHONE
It is unnecessary to speak directly
into the microphone when giving a
command.INFORMATION
Wait for the confirmation beep before
speaking a command.
Speech commands may not be recog-
nized if:
• Spoken too quickly.
• Spoken at a low or high volume.
• The roof or windows are open.
• Passengers are talking while speech
commands are spoken.
• The air conditioning speed is set
high.
• The air conditioning vents are
turned towards the microphone.
In the following conditions, the sys-
tem may not recognize the command
properly and using speech commands
may not be possible:
• The command is incorrect or
unclear. Note that certain words,
accents or speech patterns may be
difficult for the system to recognize.
• There is excessive background
noise, such as wind noise.

345
1. LEXUS PARKING ASSIST MONITOR
10
PERIPHERAL MONITORING SYSTEM
ISF_IS_ISC_Navi_EE
The distance guide lines and the vehicle
width extension guide lines may not
actually be parallel with the dividing
lines of the parking space, even when
they appear to be so. Be sure to check
visually.
The distances between the vehicle
width extension guide lines and the left
and right dividing lines of the parking
space may not be equal, even when
they appear to be so. Be sure to check
visually.
The distance guide lines give a distance
guide for flat road surfaces. In any of
the following situations, there is a mar-
gin of error between the guide lines on
the screen and the actual distance /
course on the road.
NOTICE
The parking assist monitor may not
operate properly in the following
cases, or if the precautions described
below are not followed.
• If the back of the vehicle is hit, the
position and mounting angle of the
camera may change.
• As the camera has a water proof
construction, do not detach, disas-
semble or modify it. This may cause
incorrect operation.
• Do not strongly rub the camera lens.
If the camera lens is scratched, it
cannot transmit a clear image.
• Do not allow organic solvent, car
wax, window cleaner or glass coat
to adhere to the camera. If this hap-
pens, wipe it off as soon as possible.
• If the temperature changes rapidly,
such as when hot water is poured on
the vehicle in cold weather, the sys-
tem may not operate normally.
• When washing the vehicle, do not
apply intensive bursts of water to the
camera or camera area. Doing so
may result in the camera malfunc-
tioning.
Do not expose the camera to strong
impact as this could cause a malfunc-
tion. If this happens, have the vehicle
inspected by any authorized Lexus
dealer or repairer, or another duly
qualified and equipped professional
as soon as possible.
DIFFERENCES BETWEEN
THE SCREEN AND THE
ACTUAL ROAD