sensor Lexus GX470 2003 Basic Functions / LEXUS 2003 GX470 OWNER'S MANUAL (OM60979U)

SWITCHES
24
HEADLIGHT SWITCH
To turn the lights on, twist the knob on the end of the lever.
FIRST CLICKSTOP: Only the parking, tail, license plate, side
marker and instrument panel lights turn on.
SECOND CLICKSTOP: Headlights also turn on.
THIRD CLICKSTOP (“AUTO”): The headlights and all other
lights automatically turn on depending on the darkness of the
surroundings. *
NOTE:
* The sensitivity of the automatic light control sensor can be
changed.
Ask your Lexus dealer for details.
When the headlights are on, the headlight indicator lights up in
the instrument cluster. With
the knob in the “AUTO” position, there may be a case
that the headlights do not turn on immediately, even when
the vehicle enters a dark place such as a tunnel or parking
lot according to lighting conditions. In this case, we
recommend you to twist the knob manually to the second
clickstop to turn on the headlights immediately.
When the headlight switch is turned to the first or second
clickstop, the brightness of the instrument cluster will be
reduced slightly unless the instrument panel light control dial
is turned fully up.
However, the brightness of the instrument cluster will not be
reduced in daytime even when the headlight switch is turned
to first or second clickstop.
The automatic light control sensor is on top of the driver’s side
instrument panel.
Do not place anything on the instrument panel, and/or do not
affix anything on the windshield to block this sensor.

SWITCHES
28The low washer fluid warning light in the instrument cluster
comes on when the fluid level in the tank becomes nearly
empty. For information on adding washer fluid, see “Adding
washer fluid” on page 454.
In cold weather, warm the windshield with the defroster before
using the washer. This will help prevent icing, which could
block your vision.
NOTICE
Do not operate the wipers if the windshield is dry. It may
scratch the glass.
Raindrop detection type

1 Automatic control adjuster

2 Washer on To turn the wipers on, move the lever down until you reach
the desired speed setting.
The ignition switch must be in the “ON” position.
There are 3 settings:
“AUTO” position: Automatic operation
“LO” position: Low speed operation
“HI” position: High speed operation
Automatic operation
The wiper speed is determined by the amount of raindrops
and sunlight detected by the automatic wiper control
sensor.
Twist
the automatic control adjuster in the “–” direction to
lower the sensitivity, and the “+” direction to boost the
sensitivity.
The sensor is on the inside of the windshield as shown above.

SWITCHES
29
Even if the wiper lever is in the
“AUTO” position, the system will
switch to intermittent operations in the following conditions:
 When the windshield gets extremely cold (at less than
–10 C or 14 F)
 When the system malfunctions
However, when the windshield gets extremely hot (at more
than 90C or 194F), the wipers do not operate even if the
wiper lever is in the “AUTO” position.
When the ignition switch is turned off with the wiper lever in the
“AUTO” position, and then the ignition switch is turned on
again, the automatic operation may not work even if raindrops
are on the windshield.
In this case, move the lever to another position and return it to
the “AUTO” position again.
If you stop the vehicle with the wiper switch in the “LO” position,
the wiper speed automatically changes from low speed to
intermittent operation speed.* This function does not work
when the automatic control adjuster is in the “+” position.
NOTE:
*This feature can be deactivated.
Ask your Lexus dealer for details.
CAUTION
Be careful not to get your fingers caught between the
wipers and windshield.
When the wiper lever is in the “AUTO” position with the
ignition switch on, the wipers could operate
automatically in the following cases:
 If you touch the upper center of the windshield
adjacent to the sensor.
 If you wipe the upper center of the windshield
(adjacent to which the sensor is located) with a towel.
 If the windshield vibrates.
 If you touch the sensor.
NOTICE
Do not apply detergent to or wet the automatic wiper
control sensor when cleaning the inside of the
windshield.

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GAUGES, METERS AND SERVICE REMINDER INDICATORS
46
(c) Front Passenger’s Seat Belt ReminderLight
This light reminds you to buckle up the front passenger’s seat
belt.
Once the ignition key 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 stays flashing.
If luggage or other load is placed on the front passenger seat,
depending on its weight and how it is placed on the seat,
built−in sensors in the seat cushion may detect the pressure,
causing the reminder light to come on.
(d) SRS Warning Light
The indicator comes on when the ignition key is turned to
the “ON” position. It goes off after about 6 seconds. This
means the SRS airbags and front seat belt pretensioners
are operating properly.
This warning light system monitors the airbag sensor
assembly, front airbag sensors, side and curtain shield airbag
sensor assemblies, curtain shield airbag sensor assemblies,
driver’s seat position sensor, driver’s seat belt buckle switch,
front seat belt pretensioner assemblies, inflators, warning light,
interconnecting wiring and power sources.
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.
 When the ignition key is turned to the “ON” position, the light
does not come on, remains on or flashes.
 The light comes on or starts flashing while driving.
If the light stays on, it indicates that the driver and front
passenger airbags have a problem. If the light flashes, the side
and curtain shield airbags and/or seat belt pretensioners have
a problem.

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GAUGES, METERS AND SERVICE REMINDER INDICATORS
56
Outside temperature mode
In outside temperature mode, outside air temperatures
are displayed.
The displayed value is updated every 1 second.
The displayed temperature ranges from −22F (− 30C) up to
122 F (50C).
If there is some abnormality in the connection of the outside air
temperature sensor, “ −−” will appear on the display. If “ −−”
appears on the display, contact your Lexus dealer.
In some cases, “ −−” may appear momentarily when the ignition
is quickly turned to “ON”. It is normal if it goes out soon. 
Average fuel consumption modeAverage fuel consumption is calculated and displayed
based on total driving distance and total fuel consumption
with the engine running.
The displayed value is updated every 10 seconds.
To reset the calculations, push and hold the “RESET” button for
more than 1 second.

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INTERIOR EQUIPMENT
69
 Main switch
To use the power outlet, push the main switch on the
instrument panel.
An indicator light will illuminate to indicate that the power outlet
is ready for use.
Push the main switch once again to turn the power outlet off.
When the power outlet is not in use, make sure that the main
switch is turned off.
NOTICE
 To prevent the battery from being discharged, do not
use the power outlet longer than necessary when the
engine is not running.
 Close the power outlet lid when the power outlet is
not in use. Inserting a foreign object other than the
appropriate plug that fits the outlet may cause
electrical failure or short circuits.
The power outlet is not designed for the following electric
appliances even though their power consumption is
under 115 VAC/100W. These appliances may not operate
properly.
Appliances with high initial peak wattage: Cathode−ray
tube type televisions, compressor −driven refrigerators,
electric pumps, electric tools, etc.
 Measuring devices which process precise data:
Medical equipment, measuring instruments, etc.
 Other appliances requiring an extremely stable power
supply: Microcomputer −controlled electric blankets, touch
sensor lamps, etc.
Certain electrical appliances may cause radio noise.

COMFORT ADJUSTMENT
11 8
INSIDE REAR VIEW MIRROR
Adjust the mirror so that you can just see the rear of your
vehicle in the mirror.
Pushing the “MIRROR” switch changes the mode
between AUTO and DAY.
The indicator comes on when the AUTO mode is selected.
DAY mode: The mirror surface is normal.
AUTO mode: If the mirror detects light from the headlights
of the vehicle behind you, the mirror surface darkens
slightly to reduce the reflected light.
When the ignition key is inserted and turned on, the inside rear
view mirror always turns on in the AUTO mode. When the outside air temperature is low, it may take a little
longer for the mirror to darken in response to the detection of
headlights.
CAUTION
Do not adjust the mirror while the vehicle is moving.
Doing so may cause the
driver to mishandle the vehicle
and an accident may occur resulting in death or serious
injuries.
To ensure correct functioning of an antiglare mirror
sensor located on the back side of the mirror, do not touch
or cover the sensor with your finger or a piece of cloth, etc.

COMFORT ADJUSTMENT
120For additional precision or for complete calibrating, see
“Calibrating the compass” below.
If the direction is not indicated or the system does not operate
properly, contact your Lexus dealer.

Compass sensor
NOTICE
Do not put magnets or a metal object on or near the
inside rear view mirror of the vehicle. Doing this may
cause malfunction of the compass sensor in the mirror.
Calibrating the compass (deviation calibration)
The direction display on the compass deviates from the true
direction determined by the earth’s magnetic field. The angle
of deviation varies according to the geographic position of the
vehicle.
To adjust this deviation, stop the vehicle, then push and hold
the “COMP” switch until the zone number appears on the
display. Then push the “COMP” switch, referring to the
following map to select the number of the zone where the
vehicle is.

COMFORT ADJUSTMENT
131
CAUTION
After inserting the tab, make sure the tab and buckle
are locked and that the belt is not twisted.
 Do not insert coins, clips, etc. in the buckle as this
may prevent you from properly latching the tab and
buckle.
 If the seat belt does not function normally,
immediately contact your Lexus dealer. Do not use
the seat until the seat belt is fixed. It cannot protect
an adult occupant or your child from injury.
Front seat belt pretensioners
The driver and front passenger’s seat belt pretensioners
are designed to be activated in response to a severe
frontal impact.
When the airbag sensor detects the shock of a severe frontal
impact, the front seat belts are quickly drawn back by the
retractor so that the belts snugly restrain the front seat
occupants.
The front seat belt pretensioners are activated even if there is
no passenger sitting in the front seat.
Collisions occurring at certain speeds and angles may cause
the seat belt pretensioners and SRS airbags not to operate all
together.

COMFORT ADJUSTMENT
132
This indicator comes on when the ignition key is turned to
the “ON” position. It goes off after about 6 seconds. This
means the front seat belt pretensioners are operating
properly.
This warning light system monitors the airbag sensor
assembly, front airbag sensors, side and curtain shield airbag
sensor assemblies, curtain shield airbag sensor assemblies,
driver’s seat position sensor, driver’s seat belt buckle switch,
front seat belt pretensioner assemblies, inflators, warning light,
interconnecting wiring and power sources. (For details, see
“Service remi nder indicators and warning buzzers” on page 43
for instructions.) 1 Front airbag sensors

2 Seat belt pretensioner assemblies

3 SRS warning light

4 Airbag sensor assembly
The front seat belt pretensioner system consists mainly of the
above components, and their locations are shown in the
illustration.
The front seat belt pretensioners are controlled by the airbag
sensor assembly. The airbag sensor assembly consists of a
safing sensor and airbag sensor.
When the front seat belt pretensioners are activated, an
operating noise may be heard and a small amount of
smoke−like gas may be released. This gas is harmless and
does not indicate that a fire is occurring.
Once the front seat belt pretensioners have been activated, the
seat belt retractors remain locked.