1998 Lexus LS400 lexus LS400 1998 Engine / LEXUS 1998 LS400 OWNER'S MANUAL (OM50498U)

ELECTRICAL COMPONENTS
250
64L0081
Engine compartment

ELECTRICAL COMPONENTS
251
No.FUSEAMPERECIRCUIT
1 TURN7.5Turn signal lights
2 WIPER20Windshield wipers
3 HEATER10
Air conditioning system,
Rear window defogger, Multiport
fuel injection system/sequential
multiport fuel injection system
4 FR FOG15Fog lights
5 ECUIG10Power steering control system,
Charging system,
Vehicle skid control system
6 PWRIG15
Automatic headlight leveling
system, Moon roof,
Headlight cleaner,
Power seat switch,
Tilt and telescopic steering, Shift
lock system
7 GAUGE10
Gauges and meters, service
reminder indicators and warning
buzzers,
Backup lights,
Vehicle skid control system,
Multiport fuel injection
system/sequential multiport fuel
injection system, Automatic
transmission system
8 IGN10SRS, Multiport fuel injection
system/sequential multiport fuel
injection system
9 RR FOG7.5No circuit
10 FUEL OPN10Fuel opener system
No.FUSEAMPERECIRCUIT
11 RR CIG15Rear cigarette lighter,
Power outlet
12 FR CIG15Front cigarette lighter, SRS
13 A/C7.5Air conditioning system
14 P RR
DOOR20Rear door lock,
Rear power window
15 STOP LP25Stop lights,
High mounted stop light
16 RADIO
NO.215
Audio system,
Outside rear view mirror,
Shift lock system,
Air conditioning system
17 PANEL7.5Instrument panel lights,
Air conditioning system, Glovebox
light, Audio system
18 STARTER7.5
Starting system,
Automatic transmission system,
Multiport fuel injection
system/sequential multiport fuel
injection system
19 TAIL7.5Tail lights, Side marker lights,
License plate lights
20 STOPS7.5
Shift lock system,
Height control system, Antilock
brake system,
Vehicle skid control system
21 RR S/HTR15No circuit
22 WASHER20Windshield washer

ELECTRICAL COMPONENTS
252
No.FUSEAMPERECIRCUIT
23 AIR SUS20Height control system
24 D RR
DOOR20Rear door lock,
Rear power window
25 HORN10Horns
26 ETCS15Electronic throttle control system
27 HLP L
UPR10Lefthand headlight (high beam)
28 HLP R
UPR10Righthand headlight (high beam)
29 EFI NO.210Emission control system
30 MIRHTR15Outside rear view mirror defogger
31 FR S/HTR15Seat heater
32 ALTS7.5Charging system
33 TEL15Telephone
34 CRT15Multi information display
35 RADIO
NO.120Audio system
36 MPXB10Power window, Door lock,
Tilt and telescopic steering
37 ECUB7.5Vehicle 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 OBD7.5Onboard diagnosis system
42 DRL10Vehicles sold in Canada
Daytime running light system
43 HLP R
LW R15Righthand headlight (low beam)
44 HLP L
LW R15Lefthand headlight (low beam)

ELECTRICAL COMPONENTS
253
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
254
Checking battery exterior
64L009
1
Terminals 2
Holddown clamp
Check the battery for corroded or loose connections, cracks, or
loose holddown 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 holddown 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.

ELECTRICAL COMPONENTS
255
Checking battery fluid
There are 2 types of batteries: maintenance type and
nonmaintenance type.
A nonmaintenance battery has ”MAINTENANCE FREE
BATTERY” 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.
Nonmaintenance 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
1
Upper line 2
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
”Adding distilled water” on page 257.)

ELECTRICAL COMPONENTS
256(b) Checking by the hydrometer
64L010
Check the battery condition by the hydrometer color.
Maintenance type battery
1
BLUE Good condition.
2
WHITE Charging necessary. Have the battery checked by
your Lexus dealer.
3
RED Add distilled water. (See ”Adding distilled water” on
page 257.)
Nonmaintenance type battery
1
BLUE Good condition.
2
WHITE Charging necessary. Have the battery checked by
your Lexus dealer.
3
RED Have the battery checked by your Lexus dealer.
NOTICE
(For nonmaintenance type battery):
Do not refill the battery with water.

ELECTRICAL COMPONENTS
257
Adding distilled water
(Maintenance type battery only)
64L062
1
Low 2
O.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.
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.
Nonmaintenance 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,
make sure all accessories are turned off.