Lexus ES300 1997 Service Procedures And Specifications: Electrical Components

217
SECTION 6 ± 4
SERVICE PROCEDURES AND
SPECIFICATIONS
Electrical components
Specifications 218
Checking battery operation 222
Battery recharging precautions 226
Checking and replacing the blade type fuses 227
Checking the cartridge type fuses 229
Adding washer fluid 230
Checking the headlight aim 231
Replacing light bulbs 232

ELECTRICAL COMPONENTS
218
SPECIFICATIONS
± FUSE LOCATIONS


Engine compartment
Engine compartment (Canada only)
Driver's side instrument panel
± FUSES

Engine compartment
Engine compartment (Canada only)

ELECTRICAL COMPONENTS
219
Engine compartment
Driver's side instrument panel

ELECTRICAL COMPONENTS
220No.
FUSEAMPERECIRCUIT
1ABS60Anti±lock brake system
2DRL NO. 25Vehicles sold in Canada
Daytime Running Light System
3H±LP
LH (LO)10Vehicles sold in Canada
Left-hand headlight (low beam)
4H±LP
RH (LO)10Vehicles sold in Canada
Right±hand headlight (low beam)
5ALT100Charging system
6CDS NO.230No circuit
7HTR30No circuit
8MAIN40Headlight, Starting system
9DOME7.5
Theft deterrent system, Clock,
Door courtesy light, Interior light,
Ignition switch light, Vanity light,
Wireless remote control system
10ECU±B10Cruise control system, Air
conditioning system, Power seat
system
11RAD NO.120Audio system
12HAZ10Emergency flashers, Turn signal
lights
13AM230Starting system
No.FUSEAMPERECIRCUIT
14TEL5Telephone
15
H±LP LH15Vehicles sold in U.S.A.
Left±hand headlight (high beam)
15H±LP
LH HI15Vehicles sold in Canada
Left±hand headlight (high beam)
16ALT±S5Charging system
17
H±LP RH15Vehicles sold in U.S.A.
Right±hand headlight (high beam)
17H±LP RH
HI15Vehicles sold in Canada
Right±hand headlight (high beam)
18EFI15Multiport fuel injection
19HORN10Theft deterrent system
20RDI FAN30Electronic cooling fan system
21CDS30Air conditioning system
22A/C10No circuit
23S±HTR20Seat heater system
24HTR10Air conditioning system
25GAUGE10
Gauges and measures, service
reminder indicators and warning
buzzers, Back±up light, Door
courtesy light, Seat heater, Power
window system
26WIP20Windshield wipers and washer

ELECTRICAL COMPONENTS
221 No.
FUSEAMPERECIRCUIT
27M/HTR10Outside rear view mirror defogger
28ECU±IG15
Cruise control system, Anti±lock
brake system, Shift lock system,
Power brake antenna, Theft
deterrent system, Electronic
modulated suspension, Wireless
remote control
29IGN5SRS airbag system, Multiport fuel
injection
30STOP15
Stop lights, High mounted
stoplight, Cruise control system,
Electronic modulated suspension,
Anti±lock brake system, Shift
lock system, Power seat system,
Multiport fuel injection
31TAIL10Tail light, Side marker lights,
License plate lights
32PWR
OUTLET15Power outlet
33OBD7.5On±board diagnosis system
34FOG15Fog lamps
35ST5Starting system
36DOOR25
Door courtesy light, Theft
deterrent system, Power door
lock system, Trunk lid opener,
Fuel filler door opener
No.FUSEAMPERECIRCUIT
37PANEL7.5Instrument panlel lights,
Glovebox light
38TURN7.5Emergency flashers, Turn signal
lights
39RAD NO.27.5Audio System
40CIG15Cigarette lighter, Clock, SRS
airbag system, Theft deterrent
system
41DEF40Rear window defogger, Outside
rear view mirror defogger
42PWR30Power window, Electronic moon
roof, Power seat system
43AM140Power window, Electronic moon
roof, Power seat system
SPARESpare fuse

ELECTRICAL COMPONENTS
222
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
223
Checking battery exterior


Terminals Hold±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.
Checking battery fluid
There are 2 types of batteries: maintenance type and
non±maintenance type.
A non±maintenance battery has ªMAINTENANCE 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 top of the
battery.

ELECTRICAL COMPONENTS
224(a) Checking by the fluid level lines (Maintenance type
battery only)


Upper line Lower 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 ªAdding distilled waterº on page 225.)(b) Checking the hydrometer
Check the battery condition by the hydrometer color.
Maintenance type battery

RED ± Add distilled water. (See ªAdding distilled waterº
on page 225.)
BLUE ± Good condition
WHITE ± Charging necessary. Have the battery checked
by your Lexus dealer.
Non±maintenance type battery

RED ± Have the battery checked by your Lexus dealer.
BLUE ± Good condition.
WHITE ± Charging necessary. Have the battery checked
by your Lexus dealer.

ELECTRICAL COMPONENTS
225
NOTICE
For non±maintenance battery:
Do not refill the battery with water.Adding distilled water
(Maintenance type battery only)


Low O.K.
1. Remove the vent plugs.
2. Add distilled water to cells needing fluid.
If the side of the 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 COMPONENTS
226
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 (5A 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.