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Lexus GS400 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Lexus REPAIR SHOPS DON'T WANT YOU TO KNOW
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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about Lexus GS400 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 GS400 automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR Lexus GS400 AUTOMOBILES
Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported Lexus GS400 cars and light trucks from 1990+
Lexus -> Diagnosis & Testing -> Precautions -> Air Bag System Disarming & Arming -> Battery Ground Cable -> Product Compatibility
Vehicle: 1998 Lexus GS400 4.0 V8 GAS
When servicing "LX 470" refer to" Land Cruiser" in for service procedures.
Air Bag System Disarming & Arming
Refer to and for air bag system disarming and arming procedures.
Product Compatibility
Before reple...
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BRAKE SERVICE PROCEDURES FOR Lexus GS400 AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported Lexus GS400 cars and light trucks from 1990+.
Power Brake Units -> Power Brake Unit Service -> Brake Booster Overhaul -> Brake Booster, Replace -> ES300 -> Installation -> IS300 -> LS400 -> LS430 -> Removal -> RX300 -> SC300, SC400 & 1997-2000 GS300 & GS400
Vehicle: 1998 Lexus GS400 4.0 V8 GAS
Brake Booster, Replace
ES300
Refer to Camry under "Power Brake Units" in "Toyota Unit Repair" for service procedures.
IS300
Removal
- Raise and support vehicle, then remove left front wheel.
- Remove master cylinder as outlined in "Component Replacement" under "Hydraulic Brake Systems."
- Disconnect vacuum hose from brake booster.
- Disconnect left front brake line from flexible hose of front caliper.
- Separate grommet from body through brake line, then disconnect brake line from clamp.
- Remove three bolts, Fig. , and disconnect three clamps.
- Remove lower finish panel.
- Remove return spring, clip and...
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FUEL FILTER REPLACEMENT PROCEDURES FOR Lexus GS400 AUTOMOBILES
Fuel filter replacement procedures with corresponding images for most domestic and imported Lexus GS400 cars and light trucks sold in the U.S. for 1980+.
Lexus -> Fuel Filter Replacement -> RX330, 1998-00 GS400 & 1999-03 RX300 -> Fuel Pressure Release -> Removal & Installation
Vehicle: 2000 Lexus GS400 4.0 V8 GAS
Fuel Pressure Release
- On GS300 and 400 models, remove the rear seat cushion.
- On RX300 models, remove the lefthand rear seat and side garnish.
- On all models, remove the carpeting to access the floor service hole cover.
- Disconnect the fuel pump electrical connector.
- Start the engine and allow to idle until it stalls.
- Place the ignition switch in the Lock position.
- Disconnect the battery ground cable.
Removal & Installation
Do not smoke or allow an open flame of any type when working on or near any ...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR Lexus GS400 AUTOMOBILES
Includes CV axle, universal joint, and driveline replacement, for domestic and imported Lexus GS400 cars and light trucks from 1990+.
CV AXLE SHAFT, Replace -> Rear
Vehicle: 1998 Lexus GS400 4.0 V8 GAS
Rear
- 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 ma...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR Lexus GS400 AUTOMOBILES
Includes starter and alternator replacement procedures for domestic and imported Lexus GS400 cars and light trucks from 1990+.
Alternator, Replace
Vehicle: 2000 Lexus GS400 4.0 V8 GAS
- Disconnect battery ground cable.
- Remove engine under cover.
- Remove drive belt.
- Disconnect alternator electrical connector.
- Remove rubber cap and nut, then disconnec...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR Lexus GS400 AUTOMOBILES
Cabin air filter locations and replacement procedures with corresponding images for most domestic and imported Lexus GS400 cars and light trucks sold in the U.S. as equipped to the current model year.
Cabin Air Filter Service -> Lexus -> 1998-2001 GS300, GS400 & GS430
Vehicle: 1998 Lexus GS400 4.0 V8 GAS
The cabin air filter should be replaced every 30,000 miles or 24 months. If the vehicle is operated primarily in urban areas with high concentrations of soot and diesel powered vehicles, replace the filter every 15,000 miles. The filter should be replaced more often if air flow is less than normal.
- Disconnect and isolate the battery ground cable. After disconnecting the battery ground cable wait at least 90 seconds to allow the air bag system backup power discharge.
- Remove glove compartment to instrument panel attaching bolts....
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MAINTENANCE LAMP RESET PROCEDURES FOR Lexus GS400 AUTOMOBILES
Maintenance lamp reset procedures with corresponding images for most domestic and imported Lexus GS400 cars and light trucks sold in the U.S. from 1990+.
Lexus -> Air Bag Warning Lamp -> 1998-2000 GS400
Vehicle: 1999 Lexus GS400 4.0 V8 GAS
The air bag system warning lamp warns of air bag system faults. The lamp will be lit when the ignition switch is placed in the Accessory or On positions, but should go out when the self-diagnostic system determines that no faults are present. If the lamp remains lit or flashes, a system fault is indicated. Air bag system diagnosis and repair procedures must be completed before the warning lamp can be reset.
Reset warning lamp as follows:
- Connect service wires to check connec...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR Lexus GS400 AUTOMOBILES
Includes radiator, cooling and heater hose replacement procedures for domestic and imported Lexus GS400 cars and light trucks from 1990+
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 2000 Lexus GS400 4.0 V8 GAS
Lower
- Disconnect battery ground cable.
- Drain cooling system into a suitable container by loosening drain plug of radiator.
- Reposition hose clamp at radiator outlet.
- Remove hose from radiator.
- Reposition hose clamp at thermostat housing.
- Remove hose from thermostat housing.
- Remove hose from vehicle.
- Reverse procedure to ...
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SERPENTINE BELT SERVICE PROCEDURES FOR Lexus GS400 AUTOMOBILES
Serpentine belt replacement procedures with corresponding images for most domestic and imported Lexus GS400 cars and light trucks sold in the U.S. from 1990+.
Serpentine Drive Belt, Replace
Vehicle: 1999 Lexus GS400 4.0 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 Lexus GS400 AUTOMOBILES
Component location diagrams for most Lexus GS400 cars and light trucks sold in the U.S. from 1990+.
 Engine Compartment Connector Locations, I1 Through W4 Diagram for 1998 Lexus GS400 4.0 V8 GASComponents on diagram: |
 Engine Compartment Connector Locations, I2 Through W4 Diagram for 1999 Lexus GS400 4.0 V8 GASComponents on diagram: |
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WIRING DIAGRAMS FOR Lexus GS400 AUTOMOBILES
OEM drawn wiring diagrams for most Lexus GS400 cars and light trucks sold in the U.S.
 1998 Lexus GS400 4.0 V8 GAS Wiring DiagramComponents on diagram: |
 1998 Lexus GS400 4.0 V8 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR Lexus GS400 AUTOMOBILES
OEM TSB listings for most Lexus GS400 cars and light trucks sold in the U.S. from 1985+.
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Document: REPLACEMENT CERTIFICATION LABELS Vehicle: 1999 Lexus GS400 4.0 V8 GAS Auto Systems: |
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Document: REPLACEMENT VIN PLATES Vehicle: 1998 Lexus GS400 4.0 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR Lexus GS400 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most Lexus GS400 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 Lexus GS400 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 Lexus GS400 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 Lexus GS400 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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