1998 Lexus ES300 Owner's Manuals (in English)

ELECTRICAL COMPONENTS217
No.FUSEAMPERECIRCUIT
1 ABS60Anti±lock brake system
2 DRL NO.25Vehicles sold in Canada
Daytime Running Light System
3 H±LP
LH (LO)10Vehicles sold in Canada
Left±hand headlight (low beam)
4
H±LP
RH(LO)10Vehicles sold in Canada
Right±hand headlight (low beam)
4
A/F HTR25Vehicles sold in California
Air fuel ratio sensor
5 ALT100Charging system
6 CDS NO.230No 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±B10Cruise control system, Air
conditioning system, Power seat
system
11 RAD NO.120Audio system
12 HAZ10Emergency flashers, Turn signal
lights
13 AM230Starting system
No.FUSEAMPERECIRCUIT
14 TEL5Telephone
15
H±LP LH15Vehicles sold in the U.S.A.
Left±hand headlight (high beam)
15 H±LP
LH HI15Vehicles sold in Canada
Left±hand headlight (high beam)
16 ALT±S5Charging system
17
H±LP RH15Vehicles sold in the U.S.A.
Right±hand headlight (high beam)
17 H±LP RH HI15Vehicles sold in Canada
Right±hand headlight (high beam)
18 EFI15Multiport fuel injection
19 HORN10Theft deterrent system
20 RDI FAN30Electronic cooling fan system
21 CDS30Air conditioning system
22 A/C10No circuit
23 S±HTR20Seat heater system
24 HTR10Air conditioning system
25 GAUGE10
Gauges and meters, service reminder
indicators and warning buzzers, Back±up
light, Door courtesy light, Seat heater, Power
window system
26 WIP20Windshield wipers and washer

ELECTRICAL COMPONENTS
218
No.FUSEAMPERECIRCUIT
27 M/HTR10Outside rear view mirror defogger
28 ECU±IG15
Cruise control system, Anti±lock brake
system, Shift lock system, Power antenna,
Theft deterrent system, Electronic modulated
suspension, Wireless remote control
29 IGN5SRS, Multiport fuel injection
30 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
31 TAIL10Tail light, Side marker lights, License plate
lights
32 PWR
OUTLET15Power outlet
33 OBD7.5On±board diagnosis system
34 FOG15Fog lights
35 ST5Starting system
36 DOOR25Door courtesy light, Theft deterrent system,
Power door lock system, Trunk lid opener,
Fuel filler door opener
No.FUSEAMPERECIRCUIT
37 PANEL7.5Instrument panel lights, Glovebox light
38 TURN7.5Emergency flashers, Turn signal lights
39 RAD NO.27.5Audio system
40 CIG15Cigarette lighter, Clock, SRS
41 DEF40Rear window defogger, Outside rear view
mirror defogger
42 PWR30Power window, Electronic moon roof, Power
seat system
43 AM140No circuit
SPARESpare fuse

ELECTRICAL COMPONENTS219
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 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.

ELECTRICAL COMPONENTS
220
Checking battery exterior
64E007

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 ba ttery, 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.
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 hydro\
meter.
Non±maintenance battery
Check the battery condition by the hydrometer on the top of the battery.

ELECTRICAL COMPONENTS221
(a) Checking by the fluid level lines (Maintenance type battery only)
64E008

1
Upper 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 tw\
o.
If the level is lower than the lower line, add distilled water. (See ºAdding
distilled waterº on page 222.) (b) Checking by the hydrometer
64E009
Check the battery condition by the hydrometer color.
Maintenance type battery
1
RED ± Add distilled water. (See ºAdding distilled waterº on page 222.)
2BLUE ± Good condition.
3WHITE ± Char ging 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 ± Char ging necessary. Have the battery checked by your Lexus
dealer.

ELECTRICAL COMPONENTS
222
NOTICE
(For non±maintenance battery):
Do not refill the battery with water.
Adding distilled water
(Maintenance type battery only)
64L062

1Low 2O.K.
1. Remove the vent plugs.
2. Add distilled water to cells needing fluid.
If the side of your battery is covered, check the water level by looking\
down
directly above the cell as illustrated above.
3. Retighten the vent plugs securely.
NOTICE
 Do not overfill the cells. Excess electrolyte could squirt out of the
battery during heavy charging, causing corrosion or damage.
 Use a cover on the battery for longer life.

ELECTRICAL COMPONENTS223
BATTERY RECHARGING PRECAUTIONS
During recharging, the battery is producing hydrogen gas.
Therefore, before recharging:
1. Maintenance type batteries ± Remove the vent plugs.
2. If recharging with the battery installed on the vehicle, be sure to disconnect
the ground cable.
3. 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.
 Non±maintenance batteries: Only do a slow charge (5 A or
less). Charging at a quicker rate is dangerous. The battery
may explode causing personal injuries.
Maintenance type batteries: Be sure to remove the vent
plugs before recharging.
NOTICE
Never recharge the battery while the engine is running. Also, be sure all
accessories are turned off.

ELECTRICAL COMPONENTS
224
CHECKING AND REPLACING THEBLADE TYPE FUSES
64E027
64E029±2

Engine compartment 1
Pull±out tool 2Spare fuses
64E013

Driver's side instrument panel
1. Turn the ignition switch off and remove the auxiliary box.
Determine which fuse may be causing the problem. The auxiliary box shows
the name of the circuit for each fuse.