Lexus GS300 1994 Electrical Components

SECTION 6 – 4
207
SERVICE PROCEDURES AND
SPECIFICATIONS
Electrical components
Specifications208 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking battery condition
212 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery recharging precautions
214 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking and replacing the blade type fuses215 . . . . . . . . . . . . . . . .
Checking the cartridge type fuses216 . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the windshield wiper blades217 . . . . . . . . . . . . . . . . . . . . . .
Adding washer fluid220 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the headlight aim220 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing light bulbs221 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTRICAL COMPONENTS
Engine compartment
(fuses)Driver’s side kick panel
(fuses)
Driver’s side kick panel
208
SPECIFICATIONS
− LOCATION OF FUSES− FUSES

Engine compartment
ELECTRICAL COMPONENTS
209

ELECTRICAL COMPONENTS
210
NO.FUSEAMPERECIRCUIT
1SEAT-HTR15Seat heater
2STOP20
Shift lock system, high mounted
stoplight, cruise control system,
anti-lock brake system, traction
control system, multiport fuel
injection system / sequential
multiport fuel injection system,
stop lights
3GAUGE15
Rear window and outside rear
view mirror defogger, heater
control system, air conditioning
system, gauges and meters,
service reminder indicators and
warning buzzers (except
discharge and open door
warning lights), charging system,
automatic transmission indicator,
back-up lights, daytime running
light system
4ECU-IG10
Shift lock system, telephone,
power door lock system for
passenger seat, seat belt system,
anti-lock brake system, power
steering control system, traction
control system, cruise control
system, driving pattern selector
switch, tilt and telescopic control
system, power antenna, electronic
cooling fan system, instrument
panel lights, automatic light
control system, power door lock
control system
NO.FUSEAMPERECIRCUIT
5CIG15
Clock, air conditioning system,
radio, cassette tape player,
compact disc player, shift lock
system, SRS, front and rear
cigarette lighters, power door
lock control system, power rear
view mirror control system
6TURN10Turn signal lights and indicator
7WIPER20Windshield wipers and
washer, headlight cleaner
8PANEL7.5
Automatic transmission
indicator, heater control
system, emergency flasher
switch, glovebox light, rear
ashtrays, clock, front cigarette
lighter light, radio, cassette
tape player, compact disc
player, driving pattern selector
switch light, instrument panel
lights, daytime running light
system
9SRS7.5SRS
10TAIL10License plate lights, parking
lights, tail lights

ELECTRICAL COMPONENTS
211
NO.FUSEAMPERECIRCUIT
11MIR HTR10Outside rear view mirror defogger
12FOG15Fog lights
13DRL7.5Vehicles sold in Canada
Daytime running light system
14TRAC10Traction control system
15DOME10
Interior light, vanity lights, electric
moon roof system, cruise control
system, open door warning light,
personal lights, trunk room light,
door courtesy lights, footlights,
ignition switch light, clock,
anti-lock brake system, power
antenna, radio, locking with
wireless remote control system,
theft deterrent system
16ECU-B7.5
Locking with wireless remote
control system, anti-lock brake
system, traction control system,
cruise control system, daytime
running light system, air
conditioning system
17ALT
SENSING7.5Charging system
NO.FUSEAMPERECIRCUIT
18AM215
Multiport fuel injection system /
sequential multiport fuel injection
system, SRS, charging lamp,
starting system, electronic
ignition system / distributor
ignition system, gauges and
meters, service reminder
indicators and warning buzzers
(except discharge and open door
warning lights)
19TEL15Telephone
20HAZ. HORN20Emergency flashers, horns
21EFI20
Electronically controlled
automatic transmission system,
multiport fuel injection system /
sequential multiport fuel injection
system
22RAD NO. 125
Radio, cassette tape player,
compact disc player, power
antenna
23IG230Electronic ignition system /
distributor ignition system

ELECTRICAL COMPONENTS
212
NO.FUSEAMPERECIRCUIT
24
HEAD RH15Vehicles sold in U.S.A.
Right-hand headlight
HEAD
RH-UPR10
Vehicles sold in Canada
Right-hand headlight (high
beam)
25
HEAD LH15Vehicles sold in U.S.A.
Left-hand headlight
HEAD
LH-UPR10Vehicles sold in Canada
Left-hand headlight (high beam)
26HEAD
RH-LWR10Vehicles sold in Canada
Right-hand headlight (low beam)
27HEAD
LH-LWR10Vehicles sold in Canada
Left-hand headlight (Iow beam)
28RDI FAN30Electronic cooling fan system
CHECKING BATTERY
CONDITION
CAUTION:
BATTERY PRECAUTIONS
The battery produces a 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 en route 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.

ELECTRICAL COMPONENTS
Terminals
Hold-down clamp
Blue
White
Red
213
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 happen to 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.
1. Check the battery for corroded or loose connections,
cracks, or loose hold-down clamps.
a. 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.
b. If the connections are loose, tighten the clamp bolts − but
do not overtighten.
c. 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.

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.
2. Check the hydrometer as shown.
BLUE − Good condition.
WHITE −Charging necessary. Have the battery checked by
your Lexus dealer.
RED − Have the battery checked by your Lexus dealer.

ELECTRICAL COMPONENTS
214
NOTICE:

Your Lexus has a maintenance free battery. Do not
refill the battery with water.

Use a cover on the battery for longer life.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 (5A or less). Charging at a
quicker rate is dangerous.
NOTICE:
Never recharge the battery while the engine is running.
Also, be sure all accessories are turned off.

ELECTRICAL COMPONENTS
Driver’s side kick panel
Engine compartment
Pull-out tool
Spare fuses
215
CHECKING AND REPLACING
THE BLADE TYPE FUSES
1. Turn the ignition switch off and open the fuse box lid.Determine which fuse may be causing the problem. The lid of
the fuse box shows the name of the circuit for each fuse.
2. Make sure the inoperative component is turned off. Pull
the suspected fuse straight out with the pull-out tool and
check it. If it has blown, push a new fuse into the clips.
a. Look carefully at the fuse. If the thin wire is broken, the fuse
has blown. If you are not sure or if it is too dark to see, try
replacing the suspected fuse with one of the same value that
you know is good.
b. Install only a fuse with the amperage rating designated on
the fuse box lid.

GoodBlown
ELECTRICAL COMPONENTS
Driver’s side
kick panel
Engine compartment
216If you do not have a spare fuse, in an emergency you can pull
out the “CIG”, “RADIO NO. 1”, “DOME” or “SEAT HTR” fuse,
which may be dispensable for normal driving, and use it if its
amperage rating is the same.
If you cannot use one of the same amperage, use one lower
than, but as close as possible to, the amperage. If the
amperage is lower than that specified, the fuse might blow out
again but this does not indicate anything wrong. Be sure to get
the correct fuse as soon as possible and return the substitute
to its original clips.
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 another
object, in place of a fuse. This may cause extensive
damage and possibly a fire.
CHECKING THE CARTRIDGE
TYPE FUSES
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
melted, they must be replaced.