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1991 Lexus ES250 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
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- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator 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 1991 Lexus ES250 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 ES250 automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 1991 Lexus ES250 AUTOMOBILES
Lexus -> Component Replacement & Adjustment -> COMPRESSOR, REPLACE -> ES250 -> ES300 -> LS400 -> SC300 & SC400
Vehicle: 1991 Lexus ES250 2.5 V6 GAS
ES250
- Run engine at idle with air conditioning On.
- Stop engine, then remove battery from vehicle.
- Remove igniter bracket, radiator fan and condenser fan.
- Disconnect electrical connector from magnetic clutch, temperature switch and revolution detecting sensor.
- Discharge refrigerant from refrigeration system.
- Disconnect two hoses from compressor service valves.
- Loosen compressor drive belt.
- Remove four compressor mounting bolts, then compressor assembly.
- Remove the nut, three compressor mounting bolts, then compressor m...
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BRAKE SERVICE PROCEDURES FOR 1991 Lexus ES250 AUTOMOBILES
LEXUS, POWER BRAKE UNITS -> BRAKE BOOSTER OVERHAUL
Vehicle: 1991 Lexus ES250 2.5 V6 GAS
The brake booster on these models ca...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Lexus ES250 AUTOMOBILES
Lexus -> Fuel Filter Replacement -> 1990-91 ES250 -> Fuel System Pressure Relief -> Removal & Installation
Vehicle: 1991 Lexus ES250 2.5 V6 GAS
Fuel System Pressure Relief
- Obtain the vehicle owners radio theft protection code prior to disconnecting the battery ground cable, if equipped.
- Disconnect the battery ground cable.
- Remove the fuel fill cap to release fuel tank pressure.
- Place a shop towel over the union bolt at top of fuel filter. Slowly loosen the union bolt allowing the fuel pressure to bleed down.
- When ever the union bolt is loosened to relieve fuel system pressure, always replace the bolt gasket.
Removal & Installation
Do not smoke or allow an open flame of any type when working on or near any fuel system related com...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Lexus ES250 AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 1991 Lexus ES250 2.5 V6 GAS
- Raise and support vehicle.
- Remove front fender apron seal.
- Remove cotter pin and lock nut cap.
- Loosen bearing lock nut while depressing brake pedal.
- Drain out gear oil fluid.
- Remove cotter pin and nut from tie rod end.
- Using a suitable puller or SST 09923-00020 disconnect tie rod end from steering knuckle.
- Remove nut and disconnect stabilizer bar link from lower arm.
- Remove bolt and two nuts.
- Disconnect steering knuckle from lower ball joint.
- Place match marks on drive shaft and side gear shaft or center drive shaft. Do not use a punch to mark matchmarks. Use paint, etc.
- Loosen six ...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Lexus ES250 AUTOMOBILES
Starter, Replace
Vehicle: 1991 Lexus ES250 2.5 V6 GAS
- Disconnect battery ground cable, then remove battery.
- Remove cruise control actuator as follows:
- Remove actuator cover.
- Disconnect actuator connector.
- Remove three bolts and cruise...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Lexus ES250 AUTOMOBILES
Lexus -> Low Oil Level Warning Indicator ->
Vehicle: 1991 Lexus ES250 2.5 V6 GAS
This lamp lights to indicate that the engine oil level is below a specified level. The lamp will be illuminated during engine start-up. If...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Lexus ES250 AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 1991 Lexus ES250 2.5 V6 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 proc...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1991 Lexus ES250 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1991 Lexus ES250 2.5 V6 GAS
- Loosen pivot bolt and adjusting lock bolt on alternator.
- Remove drive bolt.
- Remove drive belt.
- ...
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COMPONENT LOCATION DIAGRAMS FOR 1991 Lexus ES250 AUTOMOBILES
Component location diagrams for most 1991 Lexus ES250 cars and light trucks sold in the U.S. from 1990+.
 I/P Splices Diagram for 1991 Lexus ES250 2.5 V6 GASComponents on diagram: |
 Passenger Compartment Main Harness Connectors & Grounds Diagram for 1991 Lexus ES250 2.5 V6 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 1991 Lexus ES250 AUTOMOBILES
OEM drawn wiring diagrams for most 1991 Lexus ES250 cars and light trucks sold in the U.S.
 1991 Lexus ES250 2.5 V6 GAS Wiring DiagramComponents on diagram: |
 1991 Lexus ES250 2.5 V6 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 Lexus ES250 AUTOMOBILES
OEM TSB listings for most 1991 Lexus ES250 cars and light trucks sold in the U.S. from 1985+.
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Document: PERMANENT-TYPE PROTECTIVE WAX COATINGS Vehicle: 1991 Lexus ES250 2.5 V6 GAS Auto Systems: |
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Document: REPLACEMENT CERTIFICATION LABELS - REVISED Vehicle: 1991 Lexus ES250 2.5 V6 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 Lexus ES250 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 Lexus ES250 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 1991 Lexus ES250 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 1991 Lexus ES250 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 1991 Lexus ES250 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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