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1991 Audi 80 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Audi 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
- Maintenance Lamp Reset
- Radiator & Hose Replacement
A/C & HEATER SERVICE PROCEDURES FOR 1991 Audi 80 AUTOMOBILES
Computer Relearn Procedures -> Audi -> 1995-97 -> 1998-2004 -> OBD -> OBD II
Vehicle: 1991 Audi 80 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 80 AUTOMOBILES
AUDI, POWER BRAKE UNITS -> CHECKING PRESSURE ACCUMULATOR-GAS PRESSURE -> 100/200
Vehicle: 1991 Audi 80 2.3 L5 GAS
100/200
Gas pressure of new accumulator should measure 1131-1189 psi and minimum pressure should measure 435 psi at 68 °F.
- 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 with hollow bolt and copper washers to brake servo unit. Attach thick c...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Audi 80 AUTOMOBILES
Audi -> Fuel Filter Scheduled Maintenance -> All 1989-05 -> Normal Service -> Severe Service
Vehicle: 1991 Audi 80 2.3 L5 GAS
Normal Service
Service as re...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Audi 80 AUTOMOBILES
CV AXLE SHAFT, Replace -> Less Attached Wheel Bearing Housing -> W/Attached Wheel Bearing Housing
Vehicle: 1991 Audi 80 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...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Audi 80 AUTOMOBILES
Alternator, Replace
Vehicle: 1991 Audi 80 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...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Audi 80 AUTOMOBILES
Audi -> Electronic Ignition Warning Lamp ->
Vehicle: 1991 Audi 80 2.3 L5 GAS
The electronic ignition system warning lamp will be illuminated when the ignition switch is placed in the On position. After the engine is started, the lamp should go off. If the lamp lights during engine operation, a knocking condition is indicated or a problem has arisen in the ignition sys...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Audi 80 AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 1991 Audi 80 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 ...
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COMPONENT LOCATION DIAGRAMS FOR 1991 Audi 80 AUTOMOBILES
Component location diagrams for most 1991 Audi 80 cars and light trucks sold in the U.S. from 1990+.
Engine Compartment Components Diagram for 1991 Audi 80 2.3 L5 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 1991 Audi 80 AUTOMOBILES
OEM drawn wiring diagrams for most 1991 Audi 80 cars and light trucks sold in the U.S.
1991 Audi 80 2.3 L5 GAS Wiring Diagram Components on diagram: |
1991 Audi 80 2.3 L5 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 Audi 80 AUTOMOBILES
OEM TSB listings for most 1991 Audi 80 cars and light trucks sold in the U.S. from 1985+.
Document: AIRBAG / PYROTECHNIC SAFETY BELT DEPLOYMENT INQUIRIES - REVISED Vehicle: 1991 Audi 80 2.3 L5 GAS Auto Systems: |
Document: AIRBAG, REPLACEMENT INTERVAL CHANGE - REVISED Vehicle: 1991 Audi 80 2.3 L5 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 Audi 80 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 Audi 80 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 80 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 80 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 80 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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