1999 Lexus LS400 lexus LS400 1999 Electrical Components / LEXUS 1999 LS400 OWNER'S MANUAL (OM50514U)

ELECTRICAL COMPONENTS
441
20 STOP±S7.5
Shift lock system,
Height control system,
Anti±lock brake system,
Vehicle skid control system
21 RR S/HTR15No circuit
22 WASHER20Windshield washer
No.FUSEAMPERECIRCUIT
23 AIR SUS20Height control system
24 D RR
DOOR20Rear door lock,
Rear power window
25 HORN10Horns
26 ETCS15Electronic throttle control
system
27 H±LP L UPR10Left±hand headlight (high
beam)
28 H±LP R UPR10Right±hand headlight (high
beam)
29 EFI NO.210Emission control system
30 MIR±HTR15Outside rear view mirror
defogger
31 FR S/HTR15Seat heater
32 ALT±S7.5Charging system
33 TEL15Telephone
34 CRT15Multi information display

ELECTRICAL COMPONENTS
442
35 RADIONO.120Audio system
36 MPX±B10Power window, Door lock,
Tilt and telescopic steering
37 ECU±B7.5Vehicle skid control system,
Daytime running light system
38 HAZ10Emergency flashers
No.FUSEAMPERECIRCUIT
39 EFI NO.120Multiport fuel injection
system/sequential multiport fuel
injection system
40 DOME10Interior light, Vanity lights,
Foot lights, Rear personal light,
Garage door opener
41 OBD7.5On±board diagnosis system
42 DRL10Daytime running light system
43 H±LP R LW R15Right±hand headlight (low
beam)
44 H±LP LLW R15Left±hand headlight (low beam)

ELECTRICAL COMPONENTS
443
CHECKING BATTERYCONDITION
Precautions

ELECTRICAL COMPONENTS
444
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
445
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
64L009

ELECTRICAL COMPONENTS
446

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.

ELECTRICAL COMPONENTS
447
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. (a) Checking by the fluid level lines (Maintenance
type battery only)
64L063

ELECTRICAL COMPONENTS
448

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 450.) (b) Checking by the hydrometer