Lexus ES300 1999 Owner's Manuals (in English)

ELECTRICAL COMPONENTS
411
64E037±3
3Engine compartment
64E038±4
4Driver's side instrument panel

ELECTRICAL COMPONENTS
412
No.FUSEAMPERECIRCUIT
1 ABS60Anti±lock brake system
2 DRL NO.25Daytime Running Light System
3 HEAD
LH (LWR)10Left±hand headlight (low beam)
4 HEAD
RH (LWR)10Right±hand headlight (low
beam)
5 ALT100Charging system
6 T±STK40No circuit
7 HTR50Air conditioning system, Seat
heater
8 MAIN40Headlight, Starting system
9 DOME7.5
Theft deterrent system, Clock,
Door courtesy light, Interior
light, Ignition switch light, Vanity
light, Wireless remote control
system
10 ECU±B10Air conditioning system,
Power seat system
11 RAD NO.120Audio system
12 HAZARD10Emergency flashers, Turn
signal lights

ELECTRICAL COMPONENTS
413
No.FUSEAMPERECIRCUIT
13 AM230Starting system
14 TEL5Telephone
15 HEAD
LH (UPR)15Left±hand headlight (high
beam)
16 ALT±S5Charging system
17 HEAD RH (UPR)15Right±hand headlight
(high beam)
18 EFI15Multiport fuel injection
19 HORN10Theft deterrent system
20 RDI30Electronic cooling fan
system
21 CDS30Air conditioning system
22 A/F HTR25Air fuel ration sensor
23 A/C10No circuit
24 SEAT±
HEATER20Seat heater system
25 HEATER10Air conditioning system
26 GAUGE10
Gauges and meters,
service reminder
indicators and warning
buzzers, Back±up light,
Door courtesy light, Seat
heater, Power window
system
No.FUSEAMPERECIRCUIT
27 WIPER25Windshield wipers and
washer
28 MIRROR± HTR10Outside rear view mirror
defogger
29 ECU±IG15
Cruise control system,
Anti±lock brake system,
Shift lock system, Theft
deterrent system,
Electronic modulated
suspension, Wireless
remote control
30 IGN5SRS, Multiport fuel
injection
31 STOP15
Stop lights, High mounted
stoplight, Cruise control
system, Electronic
modulated suspension,
Anti±lock brake system,
Shift lock system, Power
seat system, Multiport
fuel injection
32 TAIL10Tail light, Side marker
lights, License plate lights
33 POWER±OUTLET15Power outlet
34 OBD7.5On±board diagnosis
system
35 FOG15Fog lights

ELECTRICAL COMPONENTS
414
No.FUSEAMPERECIRCUIT
36 STARTER5Starting system
37 DOOR25
Door courtesy light, Theft
deterrent system, Power
door lock system, Trunk
lid opener, Fuel filler door
opener
38 PANEL7.5Instrument panel lights,
Glovebox light
39 TURN7.5Emergency flashers, Turn
signal lights
40 RAD±NO.27.5Audio system
41 CIG15Cigarette lighter, Clock,
SRS
42 DEF40Rear window defogger,
Outside rear view mirror
defogger
43 PWR30Power window, Electronic
moon roof, Power seat
system
44 AM140No circuit
SPARESpare fuse

ELECTRICAL COMPONENTS
415
CHECKING BATTERYCONDITION
Precautions

ELECTRICAL COMPONENTS
416
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 l east 15 minutes and get immediate
medical attention. If possible, continue to apply
water with a sponge or cloth while traveling to the
medical office.

ELECTRICAL COMPONENTS
417
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 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.Checking battery exterior
64E007

ELECTRICAL COMPONENTS
418

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 batterywhen washing it.
Checking battery fluid
There are 2 types of batteries: maintenance type
and non±maintenance type.
A non±maintenance battery has ºMAINTENANCE
FREE BATTERYº on its top. A maintenance type battery
does not have such indication.
Maintenance type battery
Check the fluid condition by the fluid level lines on the
side of the battery. Or if the battery has a hydrometer on
its top, you can also check the hydrometer.
Non±maintenance battery
Check the battery condition by the hydrometer on the top
of the battery.

ELECTRICAL COMPONENTS
419
(a) Checking by the fluid level lines (Maintenance
type battery only)
64E008

1Upper line 2Lower line
The fluid (electrolyte) level must be between the
upper and lower lines.
When
checking the fluid level, look at all six cells, not just
one or two.
If the level is lower than the lower line, add distilled water.
(See ºAdding distilled waterº on page 421.) (b) Checking by the hydrometer

ELECTRICAL COMPONENTS
420
64E009
Check the battery condition by the hydrometer
color.
Maintenance type battery
1RED ± Add distilled water. (See ºAdding distilled
waterº on page 421.)
2BLUE ± Good condition.
3WHITE ± Charging necessary. Have the battery
checked by your Lexus dealer.
Non±maintenance type battery
1 RED ± Have the battery checked by your Lexus
dealer.
2BLUE ± Good condition.
3WHITE ± Charging necessary. Have the battery
checked by your Lexus dealer.
NOTICE
(For non±maintenance battery):
Do not refill the battery with water.