Lexus SC430 owner's manual: Electrical components

ELECTRICAL COMPONENTS

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ELECTRICAL COMPONENTS

ELECTRICAL COMPONENTS

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.

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• If electrolyte gets on your skin, thoroughly wash the contact 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 accidentally 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.
• Warning: Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling.

Checking battery exterior

► 1 Terminals 2 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.

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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.

BATTERY RECHARGING PRECAUTIONS

During recharging, the battery is producing hydrogen gas.

Therefore, before recharging:

1. If recharging with the battery installed on the vehicle, be sure to disconnect the ground cable.
2. 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.
• Only do a slow charge (5 A or less). Charging at a quicker rate is dangerous. The battery may explode causing personal injuries.

NOTICE Never recharge the battery while the engine is running. Also, make sure all accessories are turned off.

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CHECKING AND REPLACING THE BLADE TYPE FUSES

►Engine compartment 1 Spare fuses 2 Pull-out tool

►Engine compartment

►Driver’s side kick panel

►Passenger’s side kick panel

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►Trunk

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.

2. Make sure the inoperative component is turned off. Pull the suspected fuse straight out with the pull-out tool and check it. If it has blown, push a new fuse into the clips.

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►Good ►Blown a. Look carefully at the fuse. If the thin wire is broken, the fuse has blown. If you are not sure or if it is too dark to see, try replacing the suspected fuse with one of the same value that you know is good. b. Install only a fuse with the amperage rating designated on the fuse box lid.

If you do not have a spare fuse, in an emergency you can pull out the "CIG", "RADIO NO.1", "DOME" or "HTR" fuse, which may be dispensable for normal driving, and use it if its amperage rating is the same.

If you cannot use one of the same amperage, use one lower than, but as close as possible to, the amperage. If the amperage is lower than that specified, the fuse might blow out again but this does not indicate anything wrong. Be sure to get the correct fuse as soon as possible and return the substitute to its original clips.

ELECTRICAL COMPONENTS

It is a good idea to purchase a set of spare fuses and keep them in your vehicle for emergencies.

If the new fuse immediately blows out, there is a problem with the electrical system. Have your Lexus dealer correct it as soon as possible.

CAUTION Never use a fuse with a higher amperage rating, or any other object, in place of a fuse. This may cause extensive damage and possibly a fire.

CHECKING THE CARTRIDGE TYPE FUSES

►Engine compartment

►Engine compartment

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►Good ►Blown

If the headlights or other electrical components do not work and the blade type fuses are O.K., check the cartridge type fuses. If any of the cartridge type fuses are blown, they must be replaced.

If there is an overload in the circuits from the battery, the fuses are designed to blow before the entire wiring harness is damaged.

NOTICE Before replacing the fuses, have the cause of electrical overload determined and repaired by your Lexus dealer.

CAUTION Always use a genuine Lexus fuse or equivalent for replacement. Never install an ordinary wire – even for a temporary fix. This may cause extensive damage and possibly a fire.

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ADDING WASHER FLUID

If the washer tank becomes nearly empty, add washer fluid.

You may use plain water as washer fluid. However, in cold areas where temperatures range below the freezing point, use washer fluid containing antifreeze. This product is available at your Lexus dealer and most auto parts stores. Follow the manufacturer's directions for how much to mix with water.

NOTICE Do not use engine antifreeze or any other substitute because it may damage your vehicle's paint.

CHECKING THE HEADLIGHT AIM

► 1 Vertical movement adjusting bolt 1 (Inside screw) 2 Vertical movement adjusting bolt 2 (Outside screw) 3 Aiming caution label

Before checking the headlight aim:

1. Make sure the body around the headlight is not deformed.
2. Park the vehicle on a level spot.
3. Get into the driver's seat and put the vehicle in a state ready for driving (with a full tank).
4. Bounce the vehicle several times.

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Adjusting the vertical aiming

1 For vertical movement adjusting bolt 1 (Inside screw) 2 For vertical movement adjusting bolt 2 (Outside screw)

1. Turn the Phillips-head screwdriver five turns or multiple-of-5 turns in either direction for turning the vertical movement adjusting bolt 1 (inside screw). At this time, keep the turning direction and number of turns in mind.

Every 5 turns adjust an aiming position to up or down by about 0.2°.

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2. Turn the Phillips-head screwdriver one time for turning the vertical movement adjusting bolt 2 (outside screw) in the same way as step 1 in relation to the 5 turns of the Phillips-head screwdriver for turning the vertical movement adjusting bolt 1 (inside screw).

INFORMATION

• If 3 turns of the Phillips-head screwdriver are appropriate for the vertical movement adjusting bolt 1 (inside screw) at step 1, turn the Phillips-head screwdriver three fifth turns in the same direction as step 1 for the vertical movement adjusting bolt 2 (outside screw).
• The turning confirmation mark is stamped at the tip of the vertical movement adjusting bolt 2 (outside screw). Turn the Phillips-head screwdriver for turning the vertical movement adjusting bolt 2 (outside screw) while checking this mark.

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REPLACING LIGHT BULBS

The illustrations on the following pages show the locations of light bulbs. If it is necessary to replace a bulb, take your vehicle to your Lexus dealer as soon as possible. Use bulbs with the bulb numbers and wattage ratings given in the table.

CAUTION

• To prevent burning yourself, do not replace the light bulbs while they are hot.
• Halogen bulbs have pressurized gas inside and require special handling. They can burst or shatter if scratched or dropped. Hold a bulb only by its plastic or metal case. Do not touch the glass part of a bulb with bare hands.

Vehicles with discharge headlights:

• Do not touch the high voltage socket when the headlight turns on. 20000 V is momentarily generated and may cause severe injury by electric shock.
• Do not disassemble, repair or take apart the headlight bulbs, connector, power supply circuits and rotated components. Or you may be injured by electric shocks. Call your dealer when the headlights fail to work or have to be replaced or disposed of.

NOTICE Only use a bulb of the listed type.

The inside of the lens of exterior lights such as headlights may temporarily fog up when the lens becomes wet in the rain or in a car wash. This is not a problem because the fogging is caused by the temperature difference between the outside and inside of the lens, just like the windshield fogged up in the rain. However, if there is a large drop of water on the inside of the lens, or if there is water pooled inside the light, contact your Lexus dealer.

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LIGHT LOCATION

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A: HB3 halogen bulbs
B: D2S discharge bulbs
C: HB4 halogen bulbs
D: Wedge base bulbs
E: Double end bulbs
F: Single end bulbs
G: H3 halogen bulbs

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SECTION 6–5

SERVICE PROCEDURES AND SPECIFICATIONS

Body

• Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........ 351
• Protecting your vehicle from corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........ 352
• Washing and waxing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........

BODY

SPECIFICATIONS

– DIMENSIONS AND WEIGHT

*: Unladen vehicle

– FUEL TANK

| Capacity | 75 L (19.8 gal., 16.5 Imp.gal.) |

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BODY

PROTECTING YOUR VEHICLE FROM CORROSION

Proper care of your Lexus can help ensure long-term corrosion prevention.

The most common causes of corrosion to your vehicle are:

• The accumulation of road salt, dirt and moisture in hard-to-reach areas under the vehicle.
• Chipping of paint or undercoating caused by minor accidents or by stones and gravel.

The following conditions will cause or accelerate corrosion of your vehicle, so it is important to keep your vehicle, particularly the underside, as clean as possible and to repair any damage to paint or protective coatings as soon as possible.

• The presence of road salt or dust control chemicals, salt in the air near the sea coast, industrial air pollution.
• High humidity, especially at temperatures just above freezing point.
• Certain parts of your vehicle are wet or damp for an extended period of time, even though other parts of the vehicle are dry.
• Components of the vehicle which do not dry quickly due to lack of proper ventilation are exposed to high ambient temperature.

To help prevent corrosion on your Lexus, follow these guidelines:

Keep your vehicle clean by regular washing. In addition, observe the following points.

• If you drive on salted roads in the winter or if you live near the ocean, you should hose off the undercarriage at least once a month to minimize corrosion.
• High pressure water or steam is effective for cleaning the vehicle's underside and wheel housings. Pay particular attention to these areas as it is difficult to see all the mud and dirt. It will do more harm than good to simply wet the mud and debris without removing. The lower edge of doors, rocker panels and frame members have drain holes which should not be allowed to clog with dirt as trapped water in these areas can cause corrosion.
• Wash the underside of the vehicle thoroughly when winter is over.

See "Washing and waxing" on page 353 for more tips.

Check the condition of your vehicle's paint and trim. If you find any chips or scratches in the paint, touch them up immediately to prevent corrosion from starting. If the chips or scratches have gone through the bare metal, have a qualified body shop make the repair.

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Check the interior of your vehicle. Water and dirt can accumulate under the floor mats and could cause corrosion. Occasionally check under the mats to make sure the area is dry. Be particularly careful when transporting chemicals, cleansers, fertilizers, salt, etc. These should be transported in proper containers. If a spill or leak should occur, immediately clean and dry the area.

Keep your vehicle in a well ventilated garage or a roofed place. Do not park your vehicle in a damp, poorly ventilated garage. If you wash your vehicle in the garage, or if you drive it covered with water or snow, your garage may be so damp and it will cause corrosion. Even if your garage is heated, a wet vehicle can corrode if the ventilation is poor.

WASHING AND WAXING

Washing your Lexus

Keep your vehicle clean by regular washing.

The following cases may cause weakness to the paint or corrosion to the body and parts. Wash your vehicle as soon as possible.

• When driving in a coastal area

• When driving on a road sprinkled with antifreeze

• When having stuck of coal tar, tree sap, bird droppings and carcass of an insect

• When driving in the areas where there is a lot of smoke, soot, dust, iron dust and chemical substances

• When the vehicle becomes remarkably dirty with dust and mud

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Hand-washing your Lexus

Work in the shade and wait until the vehicle body is not hot to the touch.

1. Rinse off loose dirt with a hose. Remove any mud or road salt from the underside of the vehicle or in the wheel wells.
2. Wash with a mild car-wash soap, mixed according to the manufacturer's instructions. Use a soft cotton mitt and keep it wet by dipping it frequently into the wash water. Do not rub hard – let the soap and water remove the dirt.

Spray water on the side windows or top seals from above, at a 45° angle to the ground.

NOTICE Do not spray water at side windows and top seals in a way which may cause water to enter the vehicle.

Plastic wheel ornaments: The plastic wheel ornaments are damaged easily by organic substances. If any organic substance splashes an ornament, be sure to wash it off with water and check if the ornament is damaged.

CAUTION Do not attach the heavily damaged plastic wheel ornament. It may fly off the wheel and cause accidents while the vehicle is moving.

Aluminum wheels: Use only a mild soap or neutral detergent. Urethane bumpers and side moldings: Wash carefully. Do not scrub with abrasive cleaners. The bumper and side molding faces are soft. Road tar: Remove with turpentine or cleaners that are marked safe for painted surfaces.

NOTICE Do not use organic substances (gasoline, kerosene, benzine or strong solvents), which may be toxic or cause damage.

3. Rinse thoroughly – dried soap can cause streaking. In hot weather you may need to rinse each section right after you wash it.
4. To prevent water spots, dry the vehicle using a clean soft cotton towel. Do not rub or press hard – you might scratch the paint.

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Automatic car wash

NOTICE To prevent damage to the antenna, make sure it is retracted before driving your vehicle through an automatic car wash.

Your vehicle may be washed in an automatic car wash, but remember that the paint can be scratched by some types of brushes, unfiltered washing water, or the washing process itself. Scratching reduces paint durability and gloss, especially on darker colors. The manager of the car wash should be able to advise you whether the process is safe for the paint on your vehicle.

Waxing your Lexus

Polishing and waxing is recommended to maintain the original beauty of your Lexus’ finish.

Apply wax once a month or if the vehicle surface does not repel water well.

1. Always wash and dry the vehicle before you begin waxing, even if you are using a combined cleaner and wax.

2. Use a good quality polish and wax. If the finish has become extremely weathered, use a car-cleaning polish, followed by a separate wax. Carefully follow the manufacturer’s instructions and precautions. Be sure to polish and wax the chrome trim as well as the paint.

3. Wax the vehicle again when water does not bead but remains on the surface in large patches.

CLEANING THE INTERIOR

CAUTION

• Be careful not to splash water or spill liquid on the floor. This may prevent the side airbags from activating correctly, resulting in serious injury.
• Do not wash the vehicle floor with water, or allow water to get onto the floor when cleaning the vehicle interior or exterior. Water may get into audio components or other electrical components above or under the floor carpet (or mat) and cause a malfunction; and it may cause body corrosion.

Leather Interior

The selected leather is used in your Lexus. Due to characteristics of leather products, some parts of leather may be rough, uneven or scratched originally.

To keep good appearance, we recommend you to clean it periodically twice a year.

Remove dirt on the leather in the following ways:

1. Wipe it off lightly using a soft cloth (e.g. gauze) dampened with 5% solution of neutral detergent for wool.

2. Wring water from a clean cloth and thoroughly wipe off all traces of detergent with it.

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3. Wipe off the surface of the leather with a dry soft cloth. Allow the leather to dry in a ventilated shaded area. Excess of wet may cause the hardening or shrinking of the leather.

NOTICE

• Dirt or sand adhered to the leather may damage the treated surface and cause it to wear earlier. Remove dirt or sand using a vacuum cleaner.

• If a stain should fail to come out with a neutral detergent, apply a cleaner that does not contain an organic solvent.

• Never use organic substances such as benzine, alcohol or gasoline, or alkaline or acid solutions for cleaning the leather as these could cause discoloring.

• Use of a nylon brush or synthetic fiber cloth, etc. may scratch the fine grained surface of the leather.

• Mildew may develop on soiled leather upholstery. Be especially careful to avoid oil spots. Try to keep your upholstery always clean.

• Long exposure to direct sunlight may cause the leather surface to harden and shrink. Keep your vehicle in a shaded area, especially in the summer.

• The interior of your vehicle is apt to heat up on hot summer days, so avoid placing on the upholstery items made of vinyl or plastic or containing wax as these tend to stick to leather when warm.

• Improper cleaning of the leather upholstery could result in discoloration or staining.

Carpets, Windows and Seat Belts

Begin by vacuuming thoroughly to remove as much dirt as possible. Several types of foam cleaners are available; some are in aerosol cans and others are powders or liquids which you mix with water to produce a foam. To shampoo the carpets, use a sponge or brush to apply the foam. Rub in overlapping circles. Do not apply water – the best results are obtained by keeping the carpet as dry as possible. Read the shampoo instructions and follow them closely.

The seat belts may be cleaned with mild soap and water or with lukewarm water.

Use a cloth or sponge. As you are cleaning, check the belts for excessive wear, fraying or cuts.

NOTICE

• Use a good foam-type shampoo to clean the carpets.
• Do not use dye or bleach on the belts – it may weaken them.
• Do not use the belts until they become dry.
• The windows may be cleaned with any household window cleaner.
• When cleaning the inside of the rear window, be careful not to scratch or damage the heater wires or connectors.

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Air Conditioning Control Panel, Car Audio, Instrument Panel, Console Panel, and Switches

Use a soft damp cloth for cleaning.

Soak a clean soft cloth in water or lukewarm water then lightly wipe off any dirt.

NOTICE

• Do not use organic substances (solvents, kerosene, alcohol, gasoline, etc.) or alkaline or acidic solutions. These chemicals can cause discoloring, staining or peeling of the surface.
• If you use cleaners or polishing agents, make sure their ingredients do not include the substances mentioned above.
• If you use a liquid car freshener, do not spill the liquid onto the vehicle’s interior surfaces. It may contain the ingredients mentioned above. Immediately clean any spill using the method mentioned above.
• The displays of air conditioning control panel and car audio are coated to avoid reflection. If the display becomes dirty, do not use chemicals and detergent. Wipe it off with a dry cloth.

If you have any questions about the cleaning of your Lexus, your local Lexus dealer will be pleased to answer them.

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SECTION 7

REPORTING SAFETY DEFECTS FOR U.S. OWNERS

Reporting safety defects for U.S. owners

• Reporting safety defects for U.S. owners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........ 359

KEYS AND DOORS

REPORTING SAFETY DEFECTS FOR 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.

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WE REALLY CARE ABOUT YOU - PLEASE BUCKLE UP

Lexus has made a special effort to encourage use of seat belts.

Lexus belts are:

• Comfortable
• Easy to use
• Convenient

We encourage you to use your belts every time you drive.

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GAS STATION INFORMATION

• Fuel selection: 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).
• Fuel tank capacity: 75 L (19.8 gal., 16.5 Imp. gal.)
• Engine oil: "Toyota Genuine Motor Oil" or equivalent Oil grade: API grade SL "Energy-Conserving" or ILSAC multigrade engine oil. Recommended oil viscosity – SAE 5W-30 if normal temperatures are below 38°C (100°F). Oil capacity: Drain and refill with filter 5.2 L (5.5 qt., 4.5 Imp. qt.) without filter 4.6 L (4.9 qt., 4.0 Imp. qt.) See page 308 for detailed information.
• Engine coolant: Capacity: 9.9 L (10.5 qt., 8.7 Imp. qt.) Coolant type – "Toyota Genuine Long Life Coolant" or equivalent With ethylene-glycol type coolant for a proper corrosion protection of aluminum components Do not use alcohol type antifreeze or plain water alone. For checking the engine coolant, see page 311. For changing the engine coolant, see the label on the coolant reservoir.
• Automatic transmission: Fluid type – "Toyota Genuine ATF Type T-IV" See page 316 for detailed information.
• Tire information: See page 321 through 330 for detailed information.
• Tire pressure: Tire size: 245/40ZR18 245/40ZR18 93Y Tire pressure: Front 230 kPa (2.3 kgf/cm² or bar, 33 psi) Rear 230 kPa (2.3 kgf/cm² or bar, 33 psi) For sustained high speeds above 180 km/h (112 mph), in countries where such speeds are permitted by law, add 80 kPa (0.8 kgf/cm² or bar, 12 psi) to the front tires and rear tires, but never exceed the maximum cold tire pressure molded on the tire sidewall.

You should know as much about the quality and importance of proper maintenance of your new vehicle as the people who built it.

The Lexus authorized Repair Manual tells you how to maintain your vehicle and enables you to correctly perform your own maintenance.

Repair Manual Information

The best way to keep your new vehicle in top running order is to maintain it properly from the moment you drive it off the showroom floor.

The Lexus authorized Repair Manual is packed with literally everything you need to know to perform your own maintenance in virtually every area of your new vehicle.

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Maintenance procedures for the engine, chassis, body, electrical system, and more, are clearly explained and illustrated.

Periodic maintenance and tune–up

Periodic maintenance and tune–up helps to prevent small problems from growing into larger ones later on. The repair manual outlines exactly what maintenance is required and clearly explains how to do the work yourself step–by–step.

Areas covered include such things as spark plug replacement, valve clearance adjustment and engine oil and filter replacement.

Where to obtain the Repair Manual

The repair manual for SC430 written in English, may be purchased as applicable from any Lexus dealer. Pub. Name: 2003 SC430 Repair Manual Pub. No.: Vol.1 RM962 U1 Vol.2 RM962 U2

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