light Lexus GS300 2002 Electrical Components

SECTION 6 ± 4
279
SERVICE PROCEDURES AND
SPECIFICATIONS
Electrical components
Specifications 280. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking battery condition284 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery recharging precautions286 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking and replacing the blade type fuses287 . . . . . . . . . . . . . . . .
Checking the cartridge type fuses289 . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding washer fluid290 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the headlight aim291 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing light bulbs296 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTRICAL COMPONENTS
282
No.FUSEAMPERECIRCUIT
1 WASHER20Windshield washer
2 FR FOG15Fog lights
3 TAIL10Tail lights, Side marker lights,
License plate lights,
Parking lights
4 GAUGE10Back±up lights, Gauges and
meters, service reminder
indicators and buzzers
5 FUEL OPN10Fuel filler door opener
6 D FR
DOOR20Power window system,
Door lock system,
Wireless remote control
7 PANEL7.5Emergency flashers,
Headlight cleaner
8 HEATER10Air conditioning
9 SRS±B5Gauges and meters, service
reminder indicators and
warning buzzers
10 D P/SEAT30Power seat system
11 RADIO
NO.215Audio, Shift lock system
12 WIPER25Windshield wipers
13 OBD7.5On±board diagnosis
14 STOP15Stop lights,
Anti±lock brake system,
Traction control system
No.FUSEAMPERECIRCUIT
15 CIG15Cigarette lighter, Power outlet
16 ECU±IG15Power window, Door lock
system, Wireless remote
control, Theft deterrent system
17 STARTER5Starting system
18 IGN5
Multiport fuel injection
system/sequential multiport fuel
injection system, SRS,
Anti±lock brake system,
Vehicle skid control system,
Cruise control system
19 D RR
DOOR20Power window system,
Door lock system,
Wireless remote control
20 RR FOG10No circuit
21 MIR HTR10Outside rear view mirror
22 S/ROOF25Moon roof
23 P FR
DOOR20Power window system,
Door lock system,
Wireless remote control
24 P P/SEAT30Power seat system,
Tilt and telescopic steering
25 DOME10Interior lights, Personal lights,
Vanity lights, Trunk light, Clock
26 SEAT HTR20Seat heater

ELECTRICAL COMPONENTS
283
No.FUSEAMPERECIRCUIT
27 4WS25No circuit
28 TV15No circuit
29 ECU±B25Power seat system
30 P RR
DOOR20Power window system,
Door lock system,
Wireless remote control
31 ECU±B120
Power window system,
Door lock system,
Wireless remote control,
Theft deterrent system, Trunk
lid opener, Interior lights,
Personal lights, Clock,
Headlight cleaner
32 MPX±B10
Power window system,
Door lock system,
Wireless remote control,
Theft deterrent system,
Trunk lid opener
33 HORN10Horn
34 ETCS15Electronic throttle control
system
35 AM215Starting system, Multiport fuel
injection system/sequential
multiport fuel injection system
36 TEL15No circuit
37 TURN±HAZ10Turn signal lights
No.FUSEAMPERECIRCUIT
38 EFI25
Multiport fuel injection
system/sequential multiport fuel
injection system, Emission
control system
39 ALT±S5Charging system
40 RADIO
NO.130Audio
41 DRL NO.230Daytime running light system
42 DRL NO.130Daytime running light system
43 H±LP L
LW R15Left±hand headlight (low beam)
44 H±LP R
LW R15Right±hand headlight (low
beam)
45 H±LP R
UPR15Right±hand headlight (high
beam)
46 H±LP L
UPR15Left±hand headlight (high
beam)
SPARESpare fuse

ELECTRICAL COMPONENTS
284
CHECKING BATTERY CONDITION
Precautions
CAUTION
BATTERY PRECAUTIONS
The battery produces flammable and explosive
hydrogen gas.
Do not cause a spark by contacting the battery
terminals with tools.
Do not smoke or light a match near the battery.
The electrolyte contains poisonous and corrosive
sulfuric acid.
Avoid contact with eyes, skin or clothes.
Never inhale or swallow electrolyte.
Wear protective safety glasses when working near
the battery.
Keep children away from the battery.
EMERGENCY MEASURES
If electrolyte gets in your eyes, flush your eyes with
clean water for at least 15 minutes and get immediate
medical attention. If possible, continue to apply
water with a sponge or cloth while traveling to the
medical office.
If electrolyte gets on your skin, thoroughly wash the
contacted area. If you feel a pain or burn, get medical
attention immediately.
If electrolyte gets on your clothes, there is a
possibility of its soaking through to your skin, so
immediately take off the exposed 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. Then go
immediately for emergency help.
Warning: Battery posts, terminals and related
accessories contain lead and lead compounds,
chemicals known to the State of California to cause
cancer and reproductive harm. Wash hands after
handling.

ELECTRICAL COMPONENTS
289 It is a good idea to purchase a set of spare fuses and keep them
in your vehicle for emergencies.
If the new fuse immediately blows out, there is a problem with
the electrical system. Have your Lexus dealer correct it as
soon as possible.
CAUTION
Never use a fuse with a higher amperage rating, or any
other object, in place of a fuse. This may cause
extensive damage and possibly a fire.
CHECKING THE CARTRIDGE TYPE
FUSES
64G019±1

1Good 2Melted
If the headlights or other electrical components do not
work and the blade type fuses are O.K., check the
cartridge type fuses. If any of the cartridge type fuses are
blown, they must be replaced.
If there is an overload in the circuits from the battery, the fuses
are designed to blow before the entire wiring harness is
damaged.

ELECTRICAL COMPONENTS
291
CHECKING THE HEADLIGHT AIM
64G020d

1Beam angle gauge
(vertical movement for low beam)
2Beam angle gauge
(horizontal movement for low beam)
3Beam angle gauge
(vertical movement for high beam)
4Beam angle gauge
(horizontal movement for high beam)
Before checking the headlight aim:
1. Be sure that the body around the headlight is not deformed.
2. Park the vehicle on a level spot.
3. The driver gets into the driver's seat and puts the vehicle in
a state readying for a driving (with a full tank).
4. Bounce the vehicle several times.
Adjusting the headlight aiming (low beam)
64g059a

1Adjusting bolt A
2Adjusting bolt B

ELECTRICAL COMPONENTS
293
64g078a
2. Turn the bolt B the same number of turns and in the same
direction at step 1 using a Phillips±head screwdriver.
64G022a

1Mark 2Acceptable range
Horizontal movement gauge: The mark should not deviate
by more than one mark to either side of the gauge.
It the edge of the lens is out of the acceptable range of the
beam angle gauge, adjust it using bolt B.
If the error is over the value specified above, take the vehicle
to your Lexus dealer to adjust the headlight aim.
After adjusting the headlight in the vertical direction, check that
the light has been shifted from the adjusted position in the
horizontal direction.

ELECTRICAL COMPONENTS
294
Adjusting the headlight aiming (high beam)
64g080a

1Adjusting bolt A
2Adjusting bolt B
64G081

1Bubble 2Acceptable range
Vertical movement gauge: The bubble of the gauge should
not deviate from the center of the gauge by more than 2 marks
to either side of the gauge.
If the bubble is out of the acceptable range of the beam angle
gauge, adjust it using bolt A.

ELECTRICAL COMPONENTS
296
64g083a
Turn the bolt B in either direction using a Phillips±head
screwdriver.
If the error is over the value specified above, take the vehicle
to your Lexus dealer to adjust the headlight aim.
REPLACING LIGHT BULBS
The illustration on the following pages show the locations of
light bulbs. If it is necessary to replace a bulb, take your vehicle
to your Lexus dealer as soon as possible. Use bulbs with the
bulb numbers and wattage ratings given in the table.
CAUTION
To prevent yourself from burning, do not replace the
light bulbs while they are hot.
Do not disassemble, repair or take apart the low beam
headlight bulbs, connector, power supply circuits
and rotated components. Or you may be injured by
electric shocks. Call your dealer when the headlights
fail to work or have to be replaced or disposed of.
Halogen bulbs have pressurized gas inside and
require special handling. They can burst or shatter if
scratched or dropped. Hold a bulb only by its plastic
or metal case. Do not touch the glass part of a bulb
with bare hands.
NOTICE
Only use a bulb of the listed type.

ELECTRICAL COMPONENTS
297 The inside of the lens of exterior lights such as headlights may
temporarily fog up when the lens becomes wet in the rain or in
a car wash. This is not a problem because the fogging is
caused by the temperature difference between the outside and
inside of the lens, just like the windshield fogged up in the rain.
However, if there is a large drop of water on the inside of the
lens, or if there is water pooled inside the light, contact your
Lexus dealer.LIGHT LOCATION
64G023a
Light Bulbs Bulb No. W Type
1 Headlight (Low beam)
Discharge bulb D2R 35 B
Halogen bulb HB4 51 C
2 Front turn signal light 1156 21 D
3 Headlight (High beam) HB3 60 A
4 Parking light ±±± 5 D
5 Fog light HB4 51 C
6 Front side marker light 194 3.8 D