Lexus GS300 1998, GS350 1998, GS400 1998, GS430 1998, GS450H 1998 Owner Manual

SECTION 6 ± 4

SERVICE PROCEDURES AND

SPECIFICATIONS

Electrical components

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

404

Checking battery condition . . . . . . . . . . . . . . . . . . . . . . . . . . .

413

Battery recharging precautions . . . . . . . . . . . . . . . . . . . . . . . .

419

Checking and replacing the blade type fuses . . . . . . . . . . . . .

420

Checking the cartridge type fuses . . . . . . . . . . . . . . . . . . . . . .

426

Adding washer fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

428

Checking the headlight aim . . . . . . . . . . . . . . . . . . . . . . . . . .

428

Replacing light bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

431

403

ELECTRICAL COMPONENTS

SPECIFICATIONS

± FUSE LOCATION

1 Engine compartment

± FUSES

2Passenger's side kick panel

3Driver's side kick panel

4Engine compartment (Canada only)

404

ELECTRICAL COMPONENTS

Driver's side kick panel

Passenger's side kick panel

405

ELECTRICAL COMPONENTS

Engine compartment

406

ELECTRICAL COMPONENTS

Engine compartment (Canada only)

407

ELECTRICAL COMPONENTS

	No.	FUSE	AMPERE	CIRCUIT
	1	WASHER	20	Windshield washer
	2	FR FOG	15	Fog lights
		TAIL	10	Tail lights, Side marker lights,
	3			License plate lights,
				Parking lights
	4	SRS±ACC	15	SRS
		GAUGE	10	Back±up lights, Gauges and
	5			meters, service reminder indicators
				and buzzers
	6	FUEL OPN	10	Fuel filler door opener
		D FR	20	Power window system,
	7			Door lock system,
		DOOR
				Wireless remote control
	8	PANEL	7.5	Emergency flashers,
				Headlight cleaner
	9	HEATER	10	Air conditioning
		SRS±B	5	Gauges and meters, service
	10			reminder indicators and warning
				buzzers
	11	D P/SEAT	30	Power seat system
	12	RADIO	15	Audio, Shift lock system
		NO.2
	13	WIPER	25	Windshield wipers
	14	OBD	7.5	On±board diagnosis

408

ELECTRICAL COMPONENTS

	No.	FUSE	AMPERE	CIRCUIT
		STOP	15	Stop lights,
	15			Anti±lock brake system, Traction
				control system
	16	CIG	15	Cigarette lighter, Power outlet
		ECU±IG	15	Power window, Door lock system,
	17			Wireless remote control, Theft
				deterrent system
	18	STARTER	5	Starting system
				Multiport fuel injection
				system/sequential multiport fuel
	19	IGN	5	injection system, SRS, Anti±lock
				brake system,
				Vehicle skid control system, Cruise
				control system
		D RR	20	Power window system,
	20			Door lock system,
		DOOR
				Wireless remote control
	21	RR FOG	10	No circuit
	22	M/R HTR	10	Outside rear view mirror
	23	S/ROOF	25	Electronic moon roof
		P FR	20	Power window system,
	24			Door lock system,
		DOOR
				Wireless remote control
	25	P P/SEAT	30	Power seat system,
				Tilt and telescopic steering

409

ELECTRICAL COMPONENTS

	26	DOME	10	Interior lights, Personal lights,
				Vanity lights, Trunk light, Clock
	27	SEAT HTR	20	Seat heater
	No.	FUSE	AMPERE	CIRCUIT
	28	4WS	25	No circuit
	29	TV	15	No circuit
	30	ECU±B2	5	Power seat system
		P RR	20	Power window system,
	31			Door lock system,
		DDOR
				Wireless remote control
				Power window system,
				Door lock system,
	32	ECU±B1	20	Wireless remote control,
				Theft deterrent system, Trunk lid
				opener, Interior lights, Personal
				lights, Clock, Headlight cleaner
				Power window system,
		MPX±B	10	Door lock system,
	33			Wireless remote control,
				Theft deterrent system,
				Trunk lid opener
	34	HORN	10	Horn
	35	ETCS	15	Electronic throttle control system
		AM2	15	Starting system, Multiport fuel
	36			injection system/sequential
				multiport fuel injection system
	37	TEL	15	No circuit

410

ELECTRICAL COMPONENTS

	38	TURN±HA	10	Turn signal lights
		Z
	No.	FUSE	AMPERE	CIRCUIT
				Multiport fuel injection
	39	EFI	25	system/sequential multiport fuel
				injection system, Emission control
				system
	40	ALT±S	5	Charging system
	41	RADIO	20	Audio
		NO.1
	42	DRL NO.2	30	Vehicles sold in Canada:
				Daytime running light system
	43	H±LP L	10	Vehicles sold in U.S.A.:
		UPR		Left±hand headlight (high beam)
		H±LP R	10	Vehicles sold in U.S.A.:
		UPR		Right±hand headlight (high beam)
	44
		DRL NO.1	30	Vehicles sold in Canada:
				Daytime running light system
	45	H±LP L	15	Left±hand headlight (low beam)
		LWR
	46	H±LP R	15	Right±hand headlight (low beam)
		LWR
	47	H±LP R	15	Vehicles sold in Canada:
		UPR		Right±hand headlight (high beam)

411

ELECTRICAL COMPONENTS

	48	H±LP L	15	Vehicles sold in Canada:
		UPR		Right±hand headlight (high beam)
		SPARE		Spare fuse

412

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.

413

ELECTRICAL COMPONENTS

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

414

ELECTRICAL COMPONENTS

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.

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 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.

415

ELECTRICAL COMPONENTS

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

1 Upper line 2 Lower line

(b) Checking by the hydrometer

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 418.)

416

ELECTRICAL COMPONENTS

Check the battery condition by the hydrometer color. Maintenance type battery

1BLUE ± Good condition.

2WHITE ± Charging necessary. Have the battery checked by your Lexus dealer.

3RED ± Add distilled water. (See ºAdding distilled waterº on page 418.)

NOTICE

For non±maintenance battery:

Do not refill the battery with water.

Non±maintenance type battery

1BLUE ± Good condition.

2WHITE ± Charging necessary. Have the battery checked by your Lexus dealer.

3RED ± Have the battery checked by your Lexus dealer.

417

ELECTRICAL COMPONENTS

Adding distilled water (Maintenance type battery only)

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.

418

ELECTRICAL COMPONENTS

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 (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.

419

ELECTRICAL COMPONENTS

NOTICE

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

CHECKING AND REPLACING THE BLADE TYPE FUSES

420

ELECTRICAL COMPONENTS

Driver's side kick panel

Passenger's side kick panel

421

ELECTRICAL COMPONENTS

Engine compartment 1 Spare fuses 2 Pull±out tool

Engine compartment (Canada only)

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.

422

ELECTRICAL COMPONENTS

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.

423

ELECTRICAL COMPONENTS

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 ºCIGº, ºRAD NO.1º or ºOBDº 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.

424

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.

ELECTRICAL COMPONENTS

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.

425

ELECTRICAL COMPONENTS

CHECKING THE CARTRIDGE

TYPE FUSES

1 Good 2 Melted

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.

426

ELECTRICAL COMPONENTS

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.

427

ELECTRICAL COMPONENTS

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.

CHECKING THE HEADLIGHT

AIM

NOTICE

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

428

ELECTRICAL COMPONENTS

1 Beam angle gauge (vertical movement)

2 Beam angle gauge (horizontal movement)

Before checking the headlight aim:

1.Be sure that the body around the headlight is not deformed.

2.Park the vehicle on a level spot.

3.The driver gets into the driver's seat and puts the vehicle in a state readying for a driving (with a full tank).

4.Bounce the vehicle several times.

429

ELECTRICAL COMPONENTS

1 Bubble 2 Acceptable range

Vertical movement gauge: The bubble of the gauge should not deviate from the center of the gauge by more than 2 marks to either side of the gauge.

430

ELECTRICAL COMPONENTS

1 Mark 2 Acceptable range

Horizontal movement gauge: The mark should not deviate by more than one mark to either side of the gauge.

If the error is over the value specified above, take the vehicle to your Lexus dealer to adjust the headlight aim.

REPLACING LIGHT BULBS

The illustration 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.

431

ELECTRICAL COMPONENTS

CAUTION

Do not disassemble, repair or take apart the low beam 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.

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.

LIGHT LOCATION

NOTICE

Only use a bulb of the listed type.

432