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2004 Lexus SC430 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Lexus REPAIR SHOPS DON'T WANT YOU TO KNOW
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- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Tire Pressure Monitoring System
- Starter & Alternator Replacement
- Cabin Air Filter Locations & Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service

A/C & HEATER SERVICE PROCEDURES FOR 2004 Lexus SC430 AUTOMOBILES
Electrical Symbol & Wire Color Code Identification -> Wire Color Code Identification -> Imported Vehicles
Vehicle: 2004 Lexus SC430 4.3 V8 GAS
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BRAKE SERVICE PROCEDURES FOR 2004 Lexus SC430 AUTOMOBILES
Lexus -> Power Brake Units -> Precautions -> Audio Coded Anti-Theft System -> Except LX470 -> LX470
Vehicle: 2004 Lexus SC430 4.3 V8 GAS
Audio Coded Anti-Theft System
Except LX470
- Obtain theft protection code number from customer.
- Enter code number prior to disconnecting battery ground cable.
- Perform service required.
- Turn radio to On position, "CODE" will be displayed, enter code to restore operation.
LX470
Some models are equipped with an audio coded anti-theft system that will disable the radio when the battery cable is disconnected. The system can be identified by the "ANTI-THEFT SYSTEM" on the cassette tape lid. Obtain 3 digit customer code for input. Reset system after service as follows:
- Obtain 3 digit audio anti-theft co...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2004 Lexus SC430 AUTOMOBILES
Lexus -> Fuel Filter Replacement -> GS430, LS430, SC430 & 1998-06 GS300 -> Fuel System Pressure Relief -> Removal & Installation
Vehicle: 2004 Lexus SC430 4.3 V8 GAS
Fuel System Pressure Relief
- Remove the rear seat cushion.
- Remove the carpeting to access floor service hole cover.
- Disconnect the fuel pump electrical connector.
- Start the engine and let it idle until it stalls, then turn ignition OFF.
- Disconnect the battery ground cable.
Removal & Installation
Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtu...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2004 Lexus SC430 AUTOMOBILES
CV AXLE SHAFT, Replace -> Front -> Rear
Vehicle: 2004 Lexus SC430 4.3 V8 GAS
Front
- Raise and support vehicle and support it with safety stands in proper locations.
- Remove wheel nuts and front wheels.
- Remove bolts and remove disc brake cylinder from steering knuckle.
- Support brake caliper assembly with mechanics wire.
- Remove front disc brake rotor.
- Remove lefthand front hub bolt using suitable tool.
- Reverse procedure to install noting the following:
- Torque disc brake caliper bolts to 76 ft. lbs.
- Torque wheel lug nuts to 76 ft. lbs.
Rear
- Raise and support vehicle and support it with safety stands in proper locations.
- Remove wheel nuts and rear w...
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TIRE PRESSURE MONITORING SYSTEM PROCEDURES FOR 2004 Lexus SC430 AUTOMOBILES
Component Replacement -> Installation -> Removal -> Tire Pressure Sensor & Transmitter -> TPMS Antenna -> TPMS ECU
Vehicle: 2004 Lexus SC430 4.3 V8 GAS
Tire Pressure Sensor & Transmitter
If installing a replacement tire pressure sensor and transmitter, note the identification number for use during registration. Refer to the Registration under the "Relearn Procedures."
Removal
- Loosen the wheel lug nuts.
- Raise and support the vehicle with jack stands.
- Remove the wheel and tire assembly.
- Remove the tire valve stem cap, then the valve stem core and allow the tire to deflate, Fig. .
- Remove the nut retaining the tire pressure sensor and transmitter to the wheel assembly, then drop the transmitter inside the tire.
- Using a suitable tire ch...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2004 Lexus SC430 AUTOMOBILES
Starter, Replace
Vehicle: 2004 Lexus SC430 4.3 V8 GAS
- Disconnect battery ground cable.
- Drain engine coolant into suitable container.
- Remove V-bank cover, and intake air connector pipe.
- Disconnect throttle body accelerator cable.
- Remove mounting bolts and disconnect throttle body from intake manifolds.
- Remove upper and lower i...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2004 Lexus SC430 AUTOMOBILES
Cabin Air Filter Service -> Lexus -> 2003-09 SC430
Vehicle: 2004 Lexus SC430 4.3 V8 GAS
Under normal operating conditions the cabin air filter should be replaced every 12 months or 10,000 miles. In dusty areas change the cabin air filter more often.
- Open the glove compartment.
- On 2003-07 models, remove the two retainer pins located at the upper inside part of the glove compartment using a suitable pair of pliers, then lower then the glove compartment.
- On all models, through the glove compartment opening, disengage t...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2004 Lexus SC430 AUTOMOBILES
Lexus -> Low Coolant Lamp ->
Vehicle: 2004 Lexus SC430 4.3 V8 GAS
This lamp will be illuminated when the coolant level in the radiator drops below a pre-determined point. To reset the lamp, bring the c...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2004 Lexus SC430 AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 2004 Lexus SC430 4.3 V8 GAS
Inlet
- Disconnect battery ground cable.
- Drain cooling system into a suitable container by loosening drain plug of radiator.
- Reposition hose clamp at heater core.
- Remove hose from heater core.
- Reposition hose clamp at water outlet.
- Remove hose from water outlet.
- Remove hose from vehicle.
- Reverse procedure ...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2004 Lexus SC430 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2004 Lexus SC430 4.3 V8 GAS
- Remove bolts from air cleaner inlet.
- Rotate or lift belt tensioner arm counterclockwise, using a suitable tool to relieve tension from dri...
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COMPONENT LOCATION DIAGRAMS FOR 2004 Lexus SC430 AUTOMOBILES
Component location diagrams for most 2004 Lexus SC430 cars and light trucks sold in the U.S. from 1990+.
![]() Components on diagram: |
![]() Components on diagram: |
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WIRING DIAGRAMS FOR 2004 Lexus SC430 AUTOMOBILES
OEM drawn wiring diagrams for most 2004 Lexus SC430 cars and light trucks sold in the U.S.
![]() Components on diagram: |
![]() Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2004 Lexus SC430 AUTOMOBILES
OEM TSB listings for most 2004 Lexus SC430 cars and light trucks sold in the U.S. from 1985+.
Document: REPAIR MANUAL SUPPLEMENT: VEHICLE PULLING TO ONE SIDE - REVISED Vehicle: 2004 Lexus SC430 4.3 V8 GAS Symptoms: |
Document: TIRE INFLATION PRESSURE COMPENSATION AND ADJUSTMENT Vehicle: 2004 Lexus SC430 4.3 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2004 Lexus SC430 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2004 Lexus SC430 cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 2004 Lexus SC430 cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 2004 Lexus SC430 cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 2004 Lexus SC430 cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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