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1990 Audi Coupe Quattro CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Audi REPAIR SHOPS DON'T WANT YOU TO KNOW

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    Get Full Access Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1990 Audi Coupe Quattro car and truck repair procedures including Audi 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 Audi Coupe Quattro automobile. Try the Automotix DIY solution today!
    DIY REPAIR SAMPLES > CONTINUE EXPLORING >
    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 Audi mechanics you can trust. The Automotix DIY solution is particularly affordable. A full access to the entire DIY repair procedures and diagrams for your 1990 Audi Coupe Quattro 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 1990 Audi Coupe Quattro AUTOMOBILES

    A/C & Cooling System Maintenance -> Audi -> 1990-96
    Vehicle: 1990 Audi Coupe Quattro 20V 2.3 L5 GAS

    [[table data]]

    CLICK HERE TO GET FULL ACCESS TO 1990 Audi Coupe Quattro A/C & HEATER SERVICE PROCEDURES

    BRAKE SERVICE PROCEDURES FOR 1990 Audi Coupe Quattro AUTOMOBILES

    AUDI, ANTI-LOCK BRAKES -> COMPONENT REPLACEMENT -> 1990-91 100/200 -> 1992 100 -> ACCELERATION SWITCH -> COMBINATION RELAY -> Coupe Quattro & 80/90 -> ELECTRONIC CONTROL UNIT -> FRONT WHEEL SPEED SENSORS -> INSTRUMENT CLUSTER RELAY -> REAR WHEEL SPEED SENSORS -> V8 Quattro -> V8 Quattro & 100/200
    Vehicle: 1990 Audi Coupe Quattro 20V 2.3 L5 GAS

    ELECTRONIC CONTROL UNIT

    The electronic control unit is located beneath the lefthand side of the rear seat.

    • Turn ignition switch to the Off position.
    • Remove rear seat.
    • Remove spring retaining electrical connector, then disconnect electrical connector.
    • Remove screws securing control unit.
    • Reverse procedure to install.

    COMBINATION RELAY

    Coupe Quattro & 80/90

    Relay is located under instrument panel in auxiliary relay panel, position 1. Ensure ignition switch is in Off position prior to removal or installation.

    1990-91 100/200

    Relay is located at lefthand kick panel in auxiliary relay pan...

    CLICK HERE TO GET FULL ACCESS TO 1990 Audi Coupe Quattro BRAKE SERVICE PROCEDURES

    FUEL FILTER REPLACEMENT PROCEDURES FOR 1990 Audi Coupe Quattro AUTOMOBILES

    Audi -> Fuel Filter Replacement -> Gasoline Engines -> Removal & Installation
    Vehicle: 1990 Audi Coupe Quattro 20V 2.3 L5 GAS

    Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.

    Obtain the vehicle owner's radio theft protection code, then disconnect the battery ground cable. Briefly open fuel filler cap to relieve system pressure, then close it again.

    After the battery has been disconnected and reconnected, some abnormal driveability symptoms may occur. The vehicle may need to be driven while it relearns its adaptive strategy.

    Removal & Installation

    On A4 and S4 mod...

    CLICK HERE TO GET FULL ACCESS TO 1990 Audi Coupe Quattro FUEL FILTER REPLACEMENT PROCEDURES

    DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1990 Audi Coupe Quattro AUTOMOBILES

    CV AXLE SHAFT, Replace -> Less Attached Wheel Bearing Housing -> W/Attached Wheel Bearing Housing
    Vehicle: 1990 Audi Coupe Quattro 20V 2.3 L5 GAS

    W/Attached Wheel Bearing Housing

    • Loosen wheel bolts.
    • Remove wheel hub to axle shaft bolt.
    • Raise and support vehicle, then remove washer and wheel.
    • Remove axle shaft flange, nut from link rod, and control arm to stabilizer bar to subframe mounting bolts.
    • Push control arm downward, then press axle shaft out of hub using a suitable puller.
    • Reverse procedure to install, noting the following:
      • Ensure splines on stub axle and wheel hub are free of oil, grease and old locking compound.
      • Apply a .2 inch (5mm) band of D6 locking compound around end of outer CV joint splines, then install ax...

    CLICK HERE TO GET FULL ACCESS TO 1990 Audi Coupe Quattro DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES

    STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1990 Audi Coupe Quattro AUTOMOBILES

    Alternator, Replace
    Vehicle: 1990 Audi Coupe Quattro 20V 2.3 L5 GAS

    • Disconnect battery ground cable at battery.
    • Relieve tension on drive belt and remove drive belt.
    • Remove electrical connections from alternator.
    • Re...

    CLICK HERE TO GET FULL ACCESS TO 1990 Audi Coupe Quattro STARTER & ALTERNATOR REPLACEMENT PROCEDURES

    MAINTENANCE LAMP RESET PROCEDURES FOR 1990 Audi Coupe Quattro AUTOMOBILES

    Audi -> Brake Pad Wear Indicator Lamp ->
    Vehicle: 1990 Audi Coupe Quattro 20V 2.3 L5 GAS

    The brake pad wear warning lamp will be illuminated when disc brake pads wear d...

    CLICK HERE TO GET FULL ACCESS TO 1990 Audi Coupe Quattro MAINTENANCE LAMP RESET PROCEDURES

    RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1990 Audi Coupe Quattro AUTOMOBILES

    Coolant Hose, Replace -> Lower -> Upper
    Vehicle: 1990 Audi Coupe Quattro 20V 2.3 L5 GAS

    Lower

    • Drain coolant into a suitable container.
    • Reposition hose clamp at radiator and remove hose.
    • Reposition hose clamp at thermostat and remove hose.
    • Remove hose from vehicle.
    • Reverse procedure to ...

    CLICK HERE TO GET FULL ACCESS TO 1990 Audi Coupe Quattro RADIATOR & HOSE REPLACEMENT PROCEDURES

    COMPONENT LOCATION DIAGRAMS FOR 1990 Audi Coupe Quattro AUTOMOBILES

    Component location diagrams for most 1990 Audi Coupe Quattro cars and light trucks sold in the U.S. from 1990+.

    Engine Compartment Components Diagram for 1990 Audi Coupe Quattro 20V 2.3 L5 GASEngine Compartment Components Diagram for 1990 Audi Coupe Quattro 20V 2.3 L5 GAS

    Components on diagram:
  • Ignition Coil
  • Throttle Switch
  • ABS Hydraulic Control Unit
  • Coolant Temperature Sensor
  • Engine Speed Sensor
  • Coolant Temperature Switch Location Diagram for 1990 Audi Coupe Quattro 20V 2.3 L5 GASCoolant Temperature Switch Location Diagram for 1990 Audi Coupe Quattro 20V 2.3 L5 GAS

    Components on diagram:
  • Coolant Temperature Switch
  • CLICK HERE TO GET FULL ACCESS TO 1990 Audi Coupe Quattro PARTS/COMPONENTS LOCATION DIAGRAMS!

    WIRING DIAGRAMS FOR 1990 Audi Coupe Quattro AUTOMOBILES

    OEM drawn wiring diagrams for most 1990 Audi Coupe Quattro cars and light trucks sold in the U.S.

    1990 Audi Coupe Quattro 20V 2.3 L5 GAS Wiring Diagram1990 Audi Coupe Quattro 20V 2.3 L5 GAS Wiring Diagram

    Components on diagram:
  • Radiator Cooling Fan Relay
  • Radiator Cooling Fan
  • Radiator Cooling Fan Thermoswitch
  • Radiator Cooling Fan After Run Control Unit
  • Radiator Cooling Fan After Run Thermoswitch
  • 1990 Audi Coupe Quattro 20V 2.3 L5 GAS Wiring Diagram1990 Audi Coupe Quattro 20V 2.3 L5 GAS Wiring Diagram

    Components on diagram:
  • RH Front Window Switch
  • RH Rear Window Switch
  • RH Front Window Motor
  • RH Rear Window Motor
  • CLICK HERE TO GET FULL ACCESS TO 1990 Audi Coupe Quattro WIRING DIAGRAMS!

    TECHNICAL SERVICE BULLETINS FOR 1990 Audi Coupe Quattro AUTOMOBILES

    OEM TSB listings for most 1990 Audi Coupe Quattro cars and light trucks sold in the U.S. from 1985+.

    Document: AIRBAG, REPLACEMENT INTERVAL CHANGE - REVISED
    Vehicle: 1990 Audi Coupe Quattro 20V 2.3 L5 GAS

    Auto Systems:
  • Seats, Belts, Interior Trim, Carpets, Air Bags
  • Document: AIRBAG / PYROTECHNIC SAFETY BELT DEPLOYMENT INQUIRIES - REVISED
    Vehicle: 1990 Audi Coupe Quattro 20V 2.3 L5 GAS

    Auto Systems:
  • Seats, Belts, Interior Trim, Carpets, Air Bags
  • CLICK HERE TO GET FULL ACCESS TO 1990 Audi Coupe Quattro TECHNICAL SERVICE BULLETINS!

    COMPONENT/PARTS SPECIFICATIONS FOR 1990 Audi Coupe Quattro AUTOMOBILES

    BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1990 Audi Coupe Quattro 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 1990 Audi Coupe Quattro 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 1990 Audi Coupe Quattro 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 1990 Audi Coupe Quattro 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 1990 Audi Coupe Quattro SPECIFICATIONS DATA!

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    Click here to view more details1990 Audi Coupe Quattro Mirror, Passenger Side.

    Source: Auto Body Parts Store

    $68.08

    Click here to view more details about 1991 Audi Coupe Quattro Antenna1991 Audi Coupe Quattro Antenna, 3-section mast; 1200 mm cable; A high quality universal pillar side mount antenna; May require modification or other adjustment to your vehicle upon installation; Backed by 1-year, unlimited-mileage warranty..

    Source: Auto Body Parts Store

    $6.02

    Click here to view more details2007 Audi A8 Radiator, Radiator; 6.0L W12, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $245.50

    Click here to view more details1991 Audi Coupe Quattro 20V L5, 2.3 L, 2309 CC Rebuilt Engine, Warranty: 3-Year/100,000 Mile, .

    Source: Rebuilt Engines Store

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    Click here to view more details1990 Audi Coupe Quattro Used Heater Core, Light Green 1.8T 1.8L (turbogas), Very Good.

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    $69.00

    Click here to view more details1990 Audi Coupe Quattro Used Heater Core, GLS 1.8T 1.8L (turbogas), Very Good.

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