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2004 Lexus GS430 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
- 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 GS430 AUTOMOBILES
Air Bag System Precautions -> Lexus -> Disarming
Vehicle: 2004 Lexus GS430 4.3 V8 GAS
For Lexus LX 450 & LX 470 Information, Refer to "Land Cruiser" In "Toyota."
The Air Bag/Supplemental Restraint System (SRS) incorporates a back-up energy source that maintains sufficient deployment voltage for up to 90 seconds after the ignition is turned Off and the battery has been disconnected.
When the battery ground cable is disconnected, audio, clock and seat memory system will be canceled.
- Note radio station settings...
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BRAKE SERVICE PROCEDURES FOR 2004 Lexus GS430 AUTOMOBILES
Lexus -> Hydraulic Brake Systems -> Brake System Bleed -> Brake Lines -> Except LX470 -> Master Cylinder -> Traction Control (TRAC) System
Vehicle: 2004 Lexus GS430 4.3 V8 GAS
Master Cylinder
- Fill reservoir with fluid.
- Disconnect tubes from master cylinder. Then slowly depress brake pedal and hold.
- Block off outlet holes with fingers and release pedal. Repeat three or four times.
Brake Lines
Bleed wheel with longest brake line first, then work back to the master cylinder according to brake line length.
- Connect tube to brake cylinder.
- Depress pedal several times and hold, then loosen bleeder plug with pedal still held down.
- When fluid stops coming out, tighten bleeder plug and release pedal. Repeat several times.
- Repeat entire...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2004 Lexus GS430 AUTOMOBILES
Lexus -> Component Locations -> GS430, LS430, LX470, RX300, RX330, RX400h, SC430 & 1998-06 GS300
Vehicle: 2004 Lexus GS430 4.3 V8 GAS
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2004 Lexus GS430 AUTOMOBILES
CV AXLE SHAFT, Replace -> Front
Vehicle: 2004 Lexus GS430 4.3 V8 GAS
Front
- Raise and support vehicle and support it with safety stands in proper locations.
- Remove wheel nuts and rear wheels.
- Remove suspension member brace bolts.
- Remove split pin and driveshaft castle nut and washer from front hub.
- Apply brake and remove axle hub nut.
- Place reference mark on adjusting cam and lower suspension arm
- Remove bolt and disconnect lower suspension arm from axle hub.
- Place reference ...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2004 Lexus GS430 AUTOMOBILES
Starter, Replace
Vehicle: 2004 Lexus GS430 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 GS430 AUTOMOBILES
Cabin Air Filter Service -> Lexus -> 2002-05 GS300 & GS430
Vehicle: 2004 Lexus GS430 4.3 V8 GAS
Under normal operating conditions the cabin air filter should be replaced 7,500 miles. In dusty areas change the cabin air filter more often.
- Open the glove compartment.
- Remove the cover located at the rear of the glove compartment by lifting upward and pulling outward, Fig. .
- Through the glove compartment rear co...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2004 Lexus GS430 AUTOMOBILES
Lexus -> Malfunction Indicator Lamp (MIL) ->
Vehicle: 2004 Lexus GS430 4.3 V8 GAS
On some models equipped with OBD II, the MIL will also illuminate if the fuel tank filler cap is not properly tightened. Tighten fuel tank filler cap until it clicks.
On some models equipped with OBD II, if a misfire condition which may cause damage to the catalytic converter is present, the Check engine lamp will flash once per second until vehicle operation is outside the speed and load range causing the misfire. The lamp will stop flashing and remain steady
On all models, the MIL should light when the ignition switch is placed in the On position without starting the engine. When the engine is...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2004 Lexus GS430 AUTOMOBILES
Radiator, Replace
Vehicle: 2004 Lexus GS430 4.3 V8 GAS
- Remove engine under cover, Fig. .
- Drain engine coolant into suitable container.
- Remove inlet and air cleaner.
- Disconnect upper and lower radiator hoses from radiator.
- Disconnect outlet duct from Engine Control Module (ECM) box.
- Disconnect cooling fan wire from clamp, then the two cooling fan electrical connectors.
- Disconnect cooling...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2004 Lexus GS430 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2004 Lexus GS430 4.3 V8 GAS
- Remove air intake duct seal.
- Remove air cleaner inlet.
- Rotate or lift belt tensioner arm counterclockwise, using a suitable tool to relieve tension ...
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COMPONENT LOCATION DIAGRAMS FOR 2004 Lexus GS430 AUTOMOBILES
Component location diagrams for most 2004 Lexus GS430 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 GS430 AUTOMOBILES
OEM drawn wiring diagrams for most 2004 Lexus GS430 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 GS430 AUTOMOBILES
OEM TSB listings for most 2004 Lexus GS430 cars and light trucks sold in the U.S. from 1985+.
Document: REPAIR MANUAL SUPPLEMENT: VEHICLE PULLING TO ONE SIDE - REVISED Vehicle: 2004 Lexus GS430 4.3 V8 GAS Symptoms: |
Document: UPPER/LOWER WINDSHIELD TICK NOISE Vehicle: 2004 Lexus GS430 4.3 V8 GAS Symptoms: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2004 Lexus GS430 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2004 Lexus GS430 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 GS430 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 GS430 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 GS430 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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