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2003 Lexus LS430 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Lexus REPAIR SHOPS DON'T WANT YOU TO KNOW
Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!Select Section
- 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
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 Lexus LS430 car and truck
repair procedures including Lexus engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your Lexus LS430 automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2003 Lexus LS430 AUTOMOBILES
Air Bag System Precautions -> Lexus -> Disarming
Vehicle: 2003 Lexus LS430 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 2003 Lexus LS430 AUTOMOBILES
Lexus -> Power Brake Units -> Adjustments -> Brake Pedal Freeplay -> Brake Pedal Height -> Except LX470 -> LX470
Vehicle: 2003 Lexus LS430 4.3 V8 GAS
Brake Pedal Height
Except LX470
- Measure brake pedal height, Fig. .
- On RX300 models, pedal height should be 7.598-7.992 inches.
- On RX330 models, pedal height should be 5.906-6.299 inches.
- On ES300 and ES330 models, pedal height should be 5.673-6.067 inches.
- On LS430 models, pedal height should be 6.654-7.047 inches.
- On IS300 models, pedal height should be 6.063-6.457 inches.
- On all models, if pedal height measurements are not as specified, adjust as follows:
- Remove undercover and lower dash finish panel.
- Disconnect stop lamp switch.
- Loosen stop light switch locknut, then back out switch.
- Loosen ...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Lexus LS430 AUTOMOBILES
Lexus -> Component Locations -> GS430, LS430, LX470, RX300, RX330, RX400h, SC430 & 1998-06 GS300
Vehicle: 2003 Lexus LS430 4.3 V8 GAS
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Lexus LS430 AUTOMOBILES
CV AXLE SHAFT, Replace -> Rear
Vehicle: 2003 Lexus LS430 4.3 V8 GAS
Rear
- Raise and support vehicle and support it with safety stands in proper locations.
- Remove wheel nuts and rear wheels.
- Remove tailpipe.
- Remove nuts and bolt with engine undercover.
- Remove bolts from suspension member brace.
- Place reference mark on driveshaft and side gear shaft.
- Using another jack, lift wheel until driveshaft is positioned horizontally. If driveshaft cannot be removed after performing above, restore it to original condition and remove lower suspension arm.
- Place a 10 mm hexagon wrench and remove six hexagon bolts and two washers while depressing brake pedal.
- Rem...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Lexus LS430 AUTOMOBILES
Starter, Replace
Vehicle: 2003 Lexus LS430 4.3 V8 GAS
- Disconnect battery ground cable.
- Remove V-Bank engine cover.
- Remove air cleaner inlet and intake air connector.
- Disconnect throttle body.
- Remove intake manifold assembly.
- Remove rear water bypass joint.
- Remove water bypass pipe.
- Remove bolt, then pull out water bypass pipe from water pump.
- Disconnect wire clam...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 Lexus LS430 AUTOMOBILES
Cabin Air Filter Service -> Lexus -> 2001-06 LS430, 2007-09 LS460 & 2008-09 LS600h -> Front Cabin Air Filter -> Rear Cabin Air Filter
Vehicle: 2003 Lexus LS430 4.3 V8 GAS
Front Cabin Air Filter
On 2001-03 LS430 models, the cabin air filter should be replaced every 16 months or 20,000 miles. The filter should be replaced more often if air flow is less than normal.
On 2004-06 LS430, 2007-09 LS460 and 2008-09 LS600h models, the cabin air filter should be replaced every 12 months or 10,000 miles. The filter should be replaced more often if air flow is less than normal.
- Open the glove compartment.
- Remove the cover from the rear of the glove compartment.
- Through the glove compartment cover opening, disengage the filter cover re...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Lexus LS430 AUTOMOBILES
Lexus -> Malfunction Indicator Lamp (MIL) ->
Vehicle: 2003 Lexus LS430 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 2003 Lexus LS430 AUTOMOBILES
Radiator, Replace
Vehicle: 2003 Lexus LS430 4.3 V8 GAS
- Remove engine under cover.
- Drain coolant into suitable container.
- Remove air cleaner inlet and air cleaner assembly.
- Disconnect upper and lower radiator hoses from radiator.
- Disconnect engine ECU outlet duct from engine ECU b...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Lexus LS430 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Lexus LS430 4.3 V8 GAS
- Rotate or lift the belt tensioner arm, using a suitable tool to relieve tension from dr...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Lexus LS430 AUTOMOBILES
Component location diagrams for most 2003 Lexus LS430 cars and light trucks sold in the U.S. from 1990+.
 Ground Electrical Wiring Routing and Splices Diagram for 2003 Lexus LS430 4.3 V8 GASComponents on diagram: |
 Ignition Switch and Key Unlock Warning Switch Diagram for 2003 Lexus LS430 4.3 V8 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2003 Lexus LS430 AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Lexus LS430 cars and light trucks sold in the U.S.
 2003 Lexus LS430 4.3 V8 GAS Wiring DiagramComponents on diagram: |
 2003 Lexus LS430 4.3 V8 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Lexus LS430 AUTOMOBILES
OEM TSB listings for most 2003 Lexus LS430 cars and light trucks sold in the U.S. from 1985+.
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Document: REPAIR MANUAL SUPPLEMENT: VEHICLE PULLING TO ONE SIDE - REVISED Vehicle: 2003 Lexus LS430 4.3 V8 GAS Symptoms: |
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Document: UPPER/LOWER WINDSHIELD TICK NOISE Vehicle: 2003 Lexus LS430 4.3 V8 GAS Symptoms: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Lexus LS430 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Lexus LS430 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 2003 Lexus LS430 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 2003 Lexus LS430 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 2003 Lexus LS430 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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