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1994 Lexus LS400 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!

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Get Full Access Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1994 Lexus LS400 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 LS400 automobile. Try the Automotix DIY solution today!
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Using the Automotix DIY repair procedures will save you hundreds and even thousands of dollars! In addition, it will save you hours of touring the city searching for Lexus mechanics you can trust. The Automotix DIY solution is particularly affordable. A full access to the entire DIY repair procedures and diagrams for your 1994 Lexus LS400 vehicle will cost less than a single gallon of gas. Here are some of the DIY repair tips and procedures you will find here:

A/C & HEATER SERVICE PROCEDURES FOR 1994 Lexus LS400 AUTOMOBILES

Lexus -> Component Replacement & Adjustment -> THERMOSTAT, REPLACE -> ES 300 -> GS 300 & SC 300 -> LS 400 & SC 400
Vehicle: 1994 Lexus LS400 4.0 V8 GAS

ES 300

  • Drain engine coolant.
  • Remove air cleaner assembly, tag all hoses for installation reference.
  • Disconnect heater hose, hydraulic motor hose.
  • Disconnect engine electrical wire from water inlet, then disconnect engine coolant temperature sensor electrical connection.
  • Disconnect water inlet hose from water inlet and cylinder head.
  • Remove water inlet, then thermostat and gasket.
  • Reverse procedure to install. Torque water inlet nuts to 69 inch lbs.

GS 300 & SC 300

  • Drain engine coolant.
  • Remove two water inl...

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BRAKE SERVICE PROCEDURES FOR 1994 Lexus LS400 AUTOMOBILES

Anti-lock Brakes -> Diagnosis & Testing -> 1993-94 -> 1995-96 -> ABS & TRAC ECU -> ABS ECU -> Accessing Diagnostic Trouble Codes -> Actuator Operation -> Clearing Diagnostic Trouble Codes -> Component Testing -> Diagnostic Tests -> Diagnostic Trouble Code Definitions -> Diagnostic Trouble Code Interpretation -> GS300 -> GS300 & LS400 -> Less TRAC -> LS400 -> SC300 & SC400 -> Speed Sensor Diagnosis -> Terminal Identification -> Throttle Valve Motor Driver ECU -> TRAC ECU -> Wiring Diagrams -> With TRAC
Vehicle: 1994 Lexus LS400 4.0 V8 GAS

Accessing Diagnostic Trouble Codes

  • Turn ignition switch to On position.
  • Disconnect short pin from DLC1, Fig. , then connect diagnosis check wire tool No. 09843-18020, or equivalent, to terminals Tc and E1 of DLC1 or DLC2.
  • Read diagnostic trouble code from ABS warning light on combination meter. If no diagnostic trouble code appears, inspect diagnostic circuit or ABS warning circuit.
  • After completing check, disconnect terminals Te and E1 and turn off display. If more than one diagnostic trouble code is stored, lowest number will appear first.

Diagnostic Trouble Code Interpretation

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FUEL FILTER REPLACEMENT PROCEDURES FOR 1994 Lexus LS400 AUTOMOBILES

Lexus -> Fuel Filter Replacement -> 1993-97 LS400, SC300, SC400 & GS300 -> Fuel System Pressure Relief -> Removal & Installation
Vehicle: 1994 Lexus LS400 4.0 V8 GAS

Fuel System Pressure Relief

  • Obtain the vehicle owners radio theft protection code prior to disconnecting the battery ground cable, if equipped.
  • From the luggage compartment, remove the luggage compartment floor mat and trim cover.
  • Disconnect the fuel pump electrical connector, Figs. through .
  • Start the engine and allow to idle until it stalls.
  • Place the ignition switch in the Lock position.
  • Disconnect the battery ground cable.
  • Connect the fuel pump electrical connector.
  • Install the luggage compartment trim cover and floor mat.

Removal & Installation

Do not smoke or al...

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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1994 Lexus LS400 AUTOMOBILES

CV AXLE SHAFT, Replace
Vehicle: 1994 Lexus LS400 4.0 V8 GAS

  • Raise and support vehicle, then remove wheel and tire assemblies.
  • Remove cotter pin, locknut cap and locknut, Fig. .
  • When removing right side driveshaft, it will be necessary to remove the O-ring style exhaust hangers and support tail pipe with wire.
  • On models with air suspension, disconnect height control sensor and remove both mounting bolts, then support with wire, Fig. .
  • On all models, place alignment marks on driveshaft and side gear shaft with a marking pencil, Fig. ...

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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1994 Lexus LS400 AUTOMOBILES

Starter, Replace
Vehicle: 1994 Lexus LS400 4.0 V8 GAS

  • Disconnect battery ground cable.
  • Remove intake chamber and intake.
  • Disconnect starter wires, remov...

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MAINTENANCE LAMP RESET PROCEDURES FOR 1994 Lexus LS400 AUTOMOBILES

Lexus -> Anti-Lock Brake System (ABS)/VSA System Warning Lamp -> 1990-2006
Vehicle: 1994 Lexus LS400 4.0 V8 GAS

The anti-lock warning lamp is used to warn of an anti-lock brake system fault. The lamp will be lit during engine start-up, but should go out when the self-diagnostic system determines that the anti-lock system is functioning properly. If the lamp remains lit, an anti-lock fault is indicated. After diagnosis and repair are complete, the lamp may be reset as follows:

  • Place ignition switch in On position.
  • On models except GX470, 2002-03 ES300, IS300, LS430, LX470, SC430 and 2004-06 ES330 and RX330 models, connect jumper tool No. 09843-18020, or equivalent, betwe...

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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1994 Lexus LS400 AUTOMOBILES

Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 1994 Lexus LS400 4.0 V8 GAS

Inlet

  • Disconnect battery ground cable.
  • Drain cooling system into a suitable container by loosening drain plug of radiator.
  • Reposition hose clamp at heater core.
  • Remove hose from heater core.
  • Reposition hose clamp at water outlet.
  • Remove hose from water outlet.
  • Remove hose from vehicle.
  • Reverse procedure to in...

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SERPENTINE BELT SERVICE PROCEDURES FOR 1994 Lexus LS400 AUTOMOBILES

Serpentine Drive Belt, Replace
Vehicle: 1994 Lexus LS400 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 1994 Lexus LS400 AUTOMOBILES

Component location diagrams for most 1994 Lexus LS400 cars and light trucks sold in the U.S. from 1990+.

Engine Compartment Connectors (I1 Thru W5) Diagram for 1994 Lexus LS400  4.0 V8 GASEngine Compartment Connectors (I1 Thru W5) Diagram for 1994 Lexus LS400 4.0 V8 GAS

Components on diagram:
  • Connector T-2
  • Connector T-4
  • Connector T-5
  • Connector T-6
  • Connector K-1
  • I/P Main Harness Connectors (IL Thru IP1) & Instrument Panel Splices Diagram for 1994 Lexus LS400  4.0 V8 GASI/P Main Harness Connectors (IL Thru IP1) & Instrument Panel Splices Diagram for 1994 Lexus LS400 4.0 V8 GAS

    Components on diagram:
  • Connector IL-1
  • Connector IM-1
  • Connector IM-2
  • Connector IM-3
  • Connector IN-1
  • CLICK HERE TO GET FULL ACCESS TO 1994 Lexus LS400 PARTS/COMPONENTS LOCATION DIAGRAMS!

    WIRING DIAGRAMS FOR 1994 Lexus LS400 AUTOMOBILES

    OEM drawn wiring diagrams for most 1994 Lexus LS400 cars and light trucks sold in the U.S.

    1994 Lexus LS400  4.0 V8 GAS Wiring Diagram1994 Lexus LS400 4.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Power Main Relay
  • Taillight Relay
  • Defogger Relay
  • Fog Light Relay
  • Turn Signal Flasher
  • 1994 Lexus LS400  4.0 V8 GAS Wiring Diagram1994 Lexus LS400 4.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Battery
  • Ignition Switch
  • Door Lock Motor Rear LH
  • Theft Deterrent and Door Lock ECU
  • Luggage Compartment Door Opener Switch
  • CLICK HERE TO GET FULL ACCESS TO 1994 Lexus LS400 WIRING DIAGRAMS!

    TECHNICAL SERVICE BULLETINS FOR 1994 Lexus LS400 AUTOMOBILES

    OEM TSB listings for most 1994 Lexus LS400 cars and light trucks sold in the U.S. from 1985+.

    Document: PERMANENT-TYPE PROTECTIVE WAX COATINGS
    Vehicle: 1994 Lexus LS400 4.0 V8 GAS

    Auto Systems:
  • Finishes, Body Structure, Frame, Bumpers
  • Document: REPLACEMENT CERTIFICATION LABELS - REVISED
    Vehicle: 1994 Lexus LS400 4.0 V8 GAS

    Auto Systems:
  • Identification, Models, Labels, Etc.
  • CLICK HERE TO GET FULL ACCESS TO 1994 Lexus LS400 TECHNICAL SERVICE BULLETINS!

    COMPONENT/PARTS SPECIFICATIONS FOR 1994 Lexus LS400 AUTOMOBILES

    BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1994 Lexus LS400 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 1994 Lexus LS400 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 1994 Lexus LS400 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 1994 Lexus LS400 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

    CLICK HERE TO GET FULL ACCESS TO 1994 Lexus LS400 SPECIFICATIONS DATA!

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    $247.69

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    Source: Auto Body Parts Store

    $201.73

    Click here to view more details1992 Lexus LS400 15" x 6.5" Alloy Wheel, Alloy Wheel; 15 X 6.5; 14 Slots; 5 Lug; 4.5 Inch BP; Aftermarket Chrome, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $254.50

    Click here to view more details2000 Lexus LS400 V8, 4 L, 3967 CC Rebuilt Engine, Warranty: 3-Year/100,000 Mile, .

    Source: Rebuilt Engines Store

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    Click here to view more details2000 Lexus LS400 Used Rear View Mirror, Ivory, OE # 87810-50061-A1, Very Good.

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    Click here to view more details2000 Lexus LS400 Used Ignition Switch W/Key, Very Good.

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    $85.00
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