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1991 Audi 100 Quattro CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Audi REPAIR SHOPS DON'T WANT YOU TO KNOW
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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
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 Audi 100 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
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A/C & HEATER SERVICE PROCEDURES FOR 1991 Audi 100 Quattro AUTOMOBILES
Computer Relearn Procedures -> Audi -> 1995-97 -> 1998-2004 -> OBD -> OBD II
Vehicle: 1991 Audi 100 Quattro 2.3 L5 GAS
OBD
Whenever the ECM is replaced, the new ECM will need to be " Coded." Use the following procedure to "Code" the ECM.
- Connect VAG 1551, or equivalent scan tool to the diagnostic connector.
- Operate scan tool until display shows "Select Function XX."
- Press scan buttons 0 and 7 to select "Code Control Module" function, then press "Q" button to confirm input.
- "Code Control Module" and " Enter Code Number" should appear on the display.
- Enter correct code number as follows:
- Code 0003: Vehicles with manual transmission.
- Code 0004: Vehi...
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BRAKE SERVICE PROCEDURES FOR 1991 Audi 100 Quattro AUTOMOBILES
AUDI, POWER BRAKE UNITS -> CHECKING PRESSURE ACCUMULATOR PRESSURE RELIEF VALVE -> 100/200
Vehicle: 1991 Audi 100 Quattro 2.3 L5 GAS
100/200
- Ensure pump delivery rate is within specifications. Refer to "Checking Brake Servo Operating Pressure," step 5.
- With engine off, depress brake pedal approximately 20 times to reduce system pressure.
- Disconnect warning light switch electrical connector, then remove switch.
- Attach pressure gauge wit...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Audi 100 Quattro AUTOMOBILES
Audi -> Fuel Filter Scheduled Maintenance -> All 1989-05 -> Normal Service -> Severe Service
Vehicle: 1991 Audi 100 Quattro 2.3 L5 GAS
Normal Service
Service as re...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Audi 100 Quattro AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 1991 Audi 100 Quattro 2.3 L5 GAS
- Remove wheel cover and remove nut securing axle shaft in hub.
- Raise and support vehicle, then remove wheels. Remove shield in right side driveshaft.
- Remove driveshaft flange to transmission securing screws, then pull speed sensor slightly out of housing.
- On automatic transmission models, remove stabilizer bar clamps and disconnect ball joint from hub.
- On all models, press axle shaft from hub using a suitable hub puller.
- Raise transmission en...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Audi 100 Quattro AUTOMOBILES
Starter, Replace
Vehicle: 1991 Audi 100 Quattro 2.3 L5 GAS
- Obtain audio coded anti-theft code, then disconnect battery ground cable.
- Disconnect electrical leads from starter solenoid.
- Remove starter mounting bolts, then the...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Audi 100 Quattro AUTOMOBILES
Audi -> Brake Pad Wear Indicator Lamp ->
Vehicle: 1991 Audi 100 Quattro 2.3 L5 GAS
The brake pad wear warning lamp will be illuminated when disc brake pads wear d...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Audi 100 Quattro AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 1991 Audi 100 Quattro 2.3 L5 GAS
Inlet
- Drain coolant into a suitable container.
- Reposition hose clamp at heater core and remove hose.
- Reposition hose clamp at union and remove hose.
- Remove hose from vehicle.
- Reverse procedure to in...
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COMPONENT LOCATION DIAGRAMS FOR 1991 Audi 100 Quattro AUTOMOBILES
Component location diagrams for most 1991 Audi 100 Quattro cars and light trucks sold in the U.S. from 1990+.
 Fuse/Relay Panel Diagram for 1991 Audi 100 Quattro 2.3 L5 GASComponents on diagram: |
 Engine Compartment Components Diagram for 1991 Audi 100 Quattro 2.3 L5 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 1991 Audi 100 Quattro AUTOMOBILES
OEM drawn wiring diagrams for most 1991 Audi 100 Quattro cars and light trucks sold in the U.S.
 1991 Audi 100 Quattro 2.3 L5 GAS Wiring DiagramComponents on diagram: |
 1991 Audi 100 Quattro 2.3 L5 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 Audi 100 Quattro AUTOMOBILES
OEM TSB listings for most 1991 Audi 100 Quattro cars and light trucks sold in the U.S. from 1985+.
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Document: AIRBAG / PYROTECHNIC SAFETY BELT DEPLOYMENT INQUIRIES - REVISED Vehicle: 1991 Audi 100 Quattro 2.3 L5 GAS Auto Systems: |
|
Document: AIRBAG, REPLACEMENT INTERVAL CHANGE - REVISED Vehicle: 1991 Audi 100 Quattro 2.3 L5 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 Audi 100 Quattro AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 Audi 100 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 1991 Audi 100 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 1991 Audi 100 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 1991 Audi 100 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
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