2001 Lexus GS300 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 bulbs293 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTRICAL COMPONENTS
280
SPECIFICATIONS
± FUSE LOCATION
64G004a

1Engine compartment
2Passenger's side kick panel
3Driver's side kick panel
4Engine compartment
± FUSES
64G015a

Driver's side kick panel
64G014a

Passenger's side kick panel

64G013d
ELECTRICAL COMPONENTS
281

Engine compartment
64G026d

Engine compartment

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.

ELECTRICAL COMPONENTS
285
Checking battery exterior
64G001a

1Terminals 2Hold±down clamp
Check the battery for corroded or loose connections,
cracks, or loose hold±down clamps.
1. If the battery is corroded, wash it off with a solution of warm
water and baking soda. Coat the terminals with grease to
prevent further corrosion.
2. If the connections are loose, tighten the clamp bolts ± but do
not overtighten.
3. Tighten the hold±down clamp only enough to keep the
battery firmly in place. Overtightening may damage the battery
case.
NOTICE
Make sure the engine and all accessories are turned
off before performing maintenance.
When checking the battery, remove the ground cable
first and reinstall it last.
Be careful not to cause a short circuit with tools.
Take care no solution gets into the battery when
washing it.

ELECTRICAL COMPONENTS
286
Checking battery fluid
Checking by hydrometer
64G003a
Check the battery condition by the hydrometer color.
1
BLUE ± Good condition.
2
WHITE ± Charging necessary. Have the battery checked
by your Lexus dealer.
3
RED ± Have the battery checked by your Lexus dealer.
NOTICE
Do not refill the battery with water.
BATTERY RECHARGING
PRECAUTIONS
During recharging, the battery is producing hydrogen
gas.
Therefore, before recharging:
1. If recharging with the battery installed on the vehicle, be
sure to disconnect the ground cable.
2. Make sure the power switch on the recharger is off when
connecting the charger cables to the battery and when
disconnecting them.
CAUTION
Always charge the battery in an unconfined area. Do
not charge the battery in a garage or closed room
where there is not sufficient ventilation.
Only do a slow charge (5 A or less). Charging at a
quicker rate is dangerous. The battery may explode
causing personal injuries.
NOTICE
Never recharge the battery while the engine is running.
Also, be sure all accessories are turned off.