1999 LEXUS SC300 open

ENGINE
336± IGNITION SYSTEM
Spark plug ± Make DENSO NGK
± Gap
PK16TR11
BKR5EKPB11
1.1 mm (0.043 in.)
± ELECTRICAL SYSTEM
Battery ± Maintenance type battery Specific gravity reading at 20 C (68F):
Charging rates Quick charge Slow charge
± Non±maintenance battery Open voltage at 20C (68F):
Charging rates
1.260 Fully charged
1.160 Half charged
1.060 Discharged
15A max.
5A max.
12.7V Fully charged
12.3V Half charged
11.9V Discharged
[Voltage that is checked 20 minutes after the key is
removed with all the lights turned off]
5A max.

ENGINE
337
FUEL
Fuel type
Your vehicle must use only unleaded gasoline.
To help prevent gas station mixups, your Lexus has a smaller
fuel tank opening. The special nozzle on pumps with
unleaded fuel will fit it, but the larger nozzle on pumps with
leaded gas will not.
At a minimum, the gasoline you use should meet the
specifications of ASTM D4814 in the U.S.A. and CGSB
3.5±M93 in Canada.
NOTICE
Do not use leaded gasoline. Use of leaded gasoline will
cause the three±way catalytic converter to lose its
effectiveness and the emission control system to function
improperly. Also, this can increase maintenance costs.
Octane rating
Select premium unleaded gasoline with an Octane Rating
of 91 (Research Octane Number 96) or higher for
optimum engine performance. However, if such premium
type cannot be obtained, you may temporarily use
unleaded gasoline with an Octane Rating as low as 87
(Research Octane Number 91). Use of unleaded fuel with an octane number or rating lower
than stated above will cause persistent heavy knocking. If
severe, this will lead to engine damage.
If your engine knocks ...
If you detect heavy knocking even when using the
recommended fuel, or if you hear steady knocking while
holding a steady speed on level roads, consult your Lexus
dealer.
However, now and then, you may notice light knocking for a
short time while accelerating or driving up hills. This is no
cause for concern.
Gasolines containing detergent additives
Lexus r
ecommends use of gasolines that contain detergent
additives to avoid build±up of engine deposits.
For further details, ask your Lexus dealer or a local gasoline
retailer.
Improved gasolines
The American Automobile Manufacturers Association
(AAMA) has developed a specification of improved
gasolines. The AAMA specification offers optimal fuel
information for better vehicle performance and better
protection of your engine.
Lexus recommends the use of gasolines that meet the AAMA
specification, if available, for improved drivability and
emission control system.

ENGINE
338
Gasolines containing MTBE
Gasolines that contain MTBE (Methyl Tertiary±Butyl
Ether) are available in the market. If you use a gasoline
mixed with MTBE, make certain that it does not contain
more than 15% of MTBE.
Gasolines containing MMT
Some gasolines contain an octane±enhancing additive
called MMT (methylcyclopentadienyl manganese
tricarbonyl).
Lexus does not recommend the use of gasolines that contain
MMT. If fuels containing MMT are used, your emission
control system may be adversely affected. The Malfunction
Indicator Lamp on the instrument cluster may come on. If this
happens, contact your Lexus dealer for service.
Gasolines containing alcohol
Gasohol is a mixture of gasoline and ethanol. If you use
gasohol in your Lexus, be sure that it is unleaded, has an
octane rating no lower than 87 and does not contain more
than 10% ethanol. Lexus does not recommend the use of
gasolines containing methanol.
If you use gasoline containing methanol, use only gasoline
meeting the requirements above and also containing less than
5% methanol with cosolvents and corrosion inhibitors for
methanol.

CHASSIS
360It is normal for the brake fluid level to go down slightly as the
brake pads wear. So be sure to keep the reservoir filled.
If the reservoir needs frequent refilling, it may indicate a
serious mechanical problem.
If the level is low, add FMVSS No.116 DOT 3 or SAE
J1703 brake fluid to the brake reservoir.
Remove and replace the reservoir cover by hand. Add brake
fluid up to the ºMAXº line.
Use only newly opened brake fluid. Once opened, brake fluid
absorbs moisture from the air, and excess moisture can cause
a dangerous loss of braking efficiency.
CAUTION
Take care when filling the reservoir because brake fluid can
harm your hands or eyes and damage painted surfaces. If
fluid gets in your hands or eyes, flush them with clean water.
NOTICE

If you spill some of the fluid, be sure to wipe it off to
prevent it from damaging the parts or paintwork.
 For vehicles with traction control system only:Idle
the engine while pouring brake fluid into the reservoir.

ELECTRICAL COMPONENTS
378
No.FUSEAMPERECIRCUIT
11RADIONO.27.5Radio, cassette tape player,
compact disc player, power
antenna, power rear view mirrors
12TAIL7.5Tail lights, parking lights, side
marker lights, license plate lights
13ECU±IG15
Cruise control system, power
steering control system, shift lock
system, anti±lock brake system,
SRS airbag system, power door
lock system, preset steering system,
traction control system,
electronically controlled
hydraulic±driven cooling system,
passenger 's seat control system
14GAUGE10
Gauges and meters, service
reminder indicators and warning
buzzers (except discharge and open
door warning lights), back±up
lights, electronically controlled
automatic transmission system,
automatic transmission overdrive
system, headlight
15ECU±B15SRS airbag system, power rear
view mirrors
16OBD7.5On±board diagnosis system
17FOG15Fog lights
18SEAT±HT R15Seat heater

ELECTRICAL COMPONENTS
379
No.FUSEAMPERECIRCUIT
19PWR30Preset steering, electronic
moon roof, power windows,
theft deterrent system
20IG SW40Starting system
21DOOR30
Theft deterrent system, seat
control system, fuel opener
control system, power door
lock system
22DOME10
Interior light, personal lights,
door courtesy lights, ignition
switch light, open door
warning light, trunk light,
electronic moon roof system,
preset steering system, seat
belt reminder system, cruise
control system, air
conditioning system, inside
rear view mirror, door lock
and theft deterrent system,
foot light, power rear view
mirror, locking with wireless
remote control system,
passenger 's seat control
system.
23EFI30Multiport fuel injection
system/sequential multiport
fuel injection system
24HAZ±HORN15Emergency flashers, horns
No.FUSEAMPERECIRCUIT
25RADIONO.120Radio, cassette tape player,
compact disc player, power
antenna
26TEL15Telephone
27ALT
SENCING7.5Charging system
28ETCS15Traction control system
29HEAD(RH±LWR)*115Right±hand headlight (low
beam)
30HEAD(LH±LWR)*215Left±hand headlight (low
beam)
30DRL7.5Daytime Running Light
System
29HEAD(RH±LPR)15Right±hand headlight (high
beam)
30HEAD(LH±LPR)15Left±hand headlight (high
beam)
31INJ30SC300
Starting system
*1 SC300: HEAD (RH)
*2 SC300: HEAD (LH)

ELECTRICAL COMPONENTS
389
1. Turn the ignition switch off and open the fuse box lid.
Determine which fuse may be causing the problem. The lid
of the fuse box shows the name of the circuit for each fuse.

REPORTING SAFETY DEFECTS
414
REPORTING SAFETY DEFECTSFOR U.S. OWNERS
If you believe that your vehicle has a defect which
could cause a crash or could cause injury or death,
you should immediately inform the National
Highway Traffic Safety Administration (NHTSA)
in addition to notifying Toyota Motor Sales,
U.S.A., Inc. (Toll±free: 1±800±25±LEXUS).
If NHTSA receives similar complaints, it may
open an investigation, and if it finds that a safety
defect exists in a group of vehicles, it may order a
recall and remedy campaign. However, NHTSA
cannot become involved in individual problems
between you, your dealer, or Toyota Motor Sales,
U.S.A., Inc.
To contact NHTSA, you may either call the Auto
Safety Hotline toll±free at 1±800±424±9393 (or
366±0123 in Washington.D.C. area) or write to:
NHTSA, U.S. Department of Transportation,
Washington. D.C. 20590. You can also obtain
other information about motor vehicle safety from
the Hotline.