Lexus ES300 1992 Electrical Components

SECTION 6 – 4
189
SERVICE PROCEDURES AND
SPECIFICATIONS
Electrical components
Specifications190 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking battery condition and fluid level
194 . . . . . . . . . . . . . . . . . . .
Battery recharging precautions
196 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking and replacing the blade type fuses
196 . . . . . . . . . . . . . . . .
Checking the cartridge type fuses198 . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the windshield wiper blades199 . . . . . . . . . . . . . . . . . . . . . .
Adding washer fluid202 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the headlight aim202 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing light bulbs203 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTRICAL COMPONENTS
Instrument panel
Passenger’s side kick panel
(Canada only)Engine compartment
Driver’s
side kick
panel
Instrument panel
Driver’s side kick panel
190
SPECIFICATIONS
− LOCATION OF FUSES− FUSES

ELECTRICAL COMPONENTS
Engine compartment (U.S.A.)
Engine compartment (Canada)
191

ELECTRICAL COMPONENTS
Passenger’s side kick panel
192
NO.FUSEAMPERECIRCUIT
1ECU-IG15
Cruise control system, power
steering control system, shift
lock system, anti-lock brake
system. SRS airbag system,
power door lock and theft
deterrent system, power
antenna, telephone, electronic
cooling fan system.
2GAUGE10
Gauges and meters warning
lights and buzzers (except
discharge and open door
warning lights), back-up
lights, electronically,
controlled automatic
transmission system,
automatic transmission
overdrive system, rear
window and outside rear
view mirror defogger
3STOP25
Stop lights, cruise control
system cancel device, shift
lock system, anti-lock brake
system
4SEAT
HTR15Seat heater
5WIPER20Windshield wipers and
washer, headlight cleaner

ELECTRICAL COMPONENTS
193
NO.FUSEAMPERECIRCUIT
6TURN7.5Turn signal lights
7IGN7.5
Electronic fuel injection
system, electronic cooling fan
system, SRS airbag system
8CIG/
RADIO15
Radio, cassette tape player,
compact disc player, power
antenna, power rear view
mirrors, cigarette lighter,
theft deterrent system, shift
lock system, SRS airbag
system, clock
9MIR-HTR10Outside rear view mirror defogger
10TAIL15Tail lights, parking lights
11ECU-B15
SRS airbag system, anti-lock
brake system, daytime
running light system
12FOG15Fog lights
13AM140Ignition system
14P/W30Electronic moon roof, power
windows
15DEF40Rear window and outside
rear view mirror defogger
NO.FUSEAMPERECIRCUIT
16STARTER10Starting system, electronic fuel
injection system
17ALT-S7.5Charging system
18EFI15Electronic fuel injection system
19HEAD
(RH) HI15
Vehicles sold in the U.S.A.
Right-hand headlight
Vehicles sold in Canada
Right-hand headlight
(high beam)
20DOME20
Radio, cassette tape player,
compact disc player, power
antenna, interior light,
personal lights, door courtesy
lights, ignition switch light,
trunk room light, electronic
moon roof system,
instrument panel lights, door
lock and theft deterrent
system, locking with wireless
remote control system
21HAZ-
HORN15Emergency flashers, horns
22HEAD
(LH) HI15
Vehicles sold in the U.S.A.
Left-hand headlight
Vehicles sold in Canada
Left-hand headlight
(high beam)

ELECTRICAL COMPONENTS
194
NO.FUSEAMPERECIRCUIT
23AM230Ignition system, electronic
fuel injection system
24ALT100Charging system
25ABS60Anti-lock brake system
26HEAD
(LWR-LH)15
Vehicles sold in Canada
Left-hand headlight
(low beam)
27HEAD
(LWR-RH)15
Vehicles sold in Canada
Right-hand headlight
(low beam)
28TEL15Telephone
29RADIO20
Radio, cassette tape player,
compact disc player, power
antenna
30DRL7.5Daytime running light system
31HTR40Environmental control
system
CHECKING BATTERY
CONDITION AND FLUID LEVEL
CAUTION:
BATTERY PRECAUTIONS
The battery produces an 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.

ELECTRICAL COMPONENTS
Terminals
Extended maintenance
interval batteryHold - down clamp
Red
White
Blue
Indicator
Vent plug
Electrolyte (clear fluid)
must be between
upper and lower lines
195
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:

Be sure the engine and all accessories are off before
performing maintenance.

Remove the ground cable first and reinstall last.

Be careful not to cause a short circuit with tools.
2. Check the indicator as shown.
RED − Add distilled water
WHITE − Charging necessary.
BLUE − Good condition.
If the indicator is red, check the electrolyte level as shown.
a. When checking the electrolyte level, look at all six cells, not
just one or two.
b. Remove the vent plugs and replenish the battery with
distilled water.
c. After replenishing, be sure to securely retighten the vent
plugs.

ELECTRICAL COMPONENTS
Engine compartmentPull-out tool
Spare fuses
Passenger’s side kick panel
196
NOTICE:

Do not overfill the battery, or the electrolyte may
squirt out of the battery during periods of heavy
charging, causing corrosion or damage.

Use a cover on the battery for longer life.
BATTERY RECHARGING
PRECAUTIONS
During recharging, the battery is producing hydrogen
gas.
Therefore, before recharging:
1. Remove the vent plugs.
2. If recharging with the battery installed on the vehicle, be
sure to disconnect the ground cable.
3. Be 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 insufficient ventilation.
NOTICE:
Never recharge the battery while the engine is running.
Also, be sure all accessories are turned off.
CHECKING AND REPLACING
THE BLADE TYPE FUSES

Driver’s side kick panel
Instrument panel
Pull-out tool
ELECTRICAL COMPONENTS
GoodBlown
197 1. Turn the ignition switch off and open the fuse box lid.
Determine which fuse may be causing the the problem. The lid
of the fuse box shows the name of the circuit for each fuse.2. Be sure the inoperative component is off. Pull a
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.

ELECTRICAL COMPONENTS
Engine compartment
Passenger’s side kick panel
198b. Install only a fuse with the amperage rating designated on
the fuse box lid.
If you do not have a spare fuse in an emergency, you can pull
out the “CIG/RADIO”, “RADIO”, “DOME” or “MIR-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. It may cause extensive damage
and possibly cause 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.