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1998 Lexus GS400 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 1998 Lexus GS400 AUTOMOBILES
Lexus -> Component Replacement & Adjustment -> 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.
Battery Ground Cable
Prior to serv...
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BRAKE SERVICE PROCEDURES FOR 1998 Lexus GS400 AUTOMOBILES
Disc Brakes -> Front Disc Brakes -> Tightening Specifications
Vehicle: 1998 Lexus GS400 4.0 V8 GAS
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1998 Lexus GS400 AUTOMOBILES
Lexus -> Fuel Filter Replacement -> RX330, 1998-00 GS400 & 1999-03 RX300 -> Fuel Pressure Release -> Removal & Installation
Vehicle: 1998 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 1998 Lexus GS400 AUTOMOBILES
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 1998 Lexus GS400 AUTOMOBILES
Starter, Replace
Vehicle: 1998 Lexus GS400 4.0 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 1998 Lexus GS400 AUTOMOBILES
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 1998 Lexus GS400 AUTOMOBILES
Lexus -> Overdrive (O/D) Indicator Lamp ->
Vehicle: 1998 Lexus GS400 4.0 V8 GAS
The automatic transmission electrical system possesses internal self-diagnostic capabilities. If a fault occurs within the system, the Electronic Control Module (ECM) stores a diagnostic trouble code and the "... "
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1998 Lexus GS400 AUTOMOBILES
Radiator, Replace
Vehicle: 1998 Lexus GS400 4.0 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 fan Engine ...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1998 Lexus GS400 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1998 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 1998 Lexus GS400 AUTOMOBILES
Component location diagrams for most 1998 Lexus GS400 cars and light trucks sold in the U.S. from 1990+.
Engine Compartment Connector Locations, A1 Through H17 Diagram for 1998 Lexus GS400 4.0 V8 GAS Components on diagram: |
Seat Connector Locations Diagram for 1998 Lexus GS400 4.0 V8 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 1998 Lexus GS400 AUTOMOBILES
OEM drawn wiring diagrams for most 1998 Lexus GS400 cars and light trucks sold in the U.S.
1998 Lexus GS400 4.0 V8 GAS Wiring Diagram Components on diagram: |
1998 Lexus GS400 4.0 V8 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1998 Lexus GS400 AUTOMOBILES
OEM TSB listings for most 1998 Lexus GS400 cars and light trucks sold in the U.S. from 1985+.
Document: PERMANENT-TYPE PROTECTIVE WAX COATINGS Vehicle: 1998 Lexus GS400 4.0 V8 GAS Auto Systems: |
Document: REPLACEMENT CERTIFICATION LABELS - REVISED Vehicle: 1998 Lexus GS400 4.0 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1998 Lexus GS400 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1998 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 1998 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 1998 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 1998 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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