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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 Audi 80 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 1991 Audi 80 Quattro automobile. Try the Automotix DIY solution today!
We have info for following modifications of 1991 Audi 80 Quattro
- 1991 Audi 80 Quattro 2.3 L5 GAS, CC:2309, Fuel Injection, Engine VIN:, Desg:C
- 1991 Audi 80 Quattro 2.3 L5 GAS, CC:2309, Fuel Injection, Engine VIN:, Desg:D
A/C & HEATER SERVICE PROCEDURES FOR 1991 Audi 80 Quattro AUTOMOBILES
Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1991 Audi 80 Quattro cars and light trucks from 1990+
Audi -> Automatic Temperature Control System Diagnosis & Testing -> A/C SYSTEM TROUBLESHOOTING -> A/C CONTROL HEAD ALWAYS DARK -> A/C CONTROL HEAD ILLUMINATION CANNOT BE REGULATED -> A/C CONTROL HEAD MEMORY DISPLAY, CHECKING -> A/C CONTROL HEAD MEMORY LOSS, CHECKING -> A/C COOLING PERFORMANCE, CHECKING -> A/C FRESH AIR BLOWER ALWAYS RUNS (OFF MODE) -> A/C HIGH PRESSURE SWITCHES (F118 & F23), CHECKING -> A/C REFRIGERANT LOW-PRESSURE SWITCH, CHECKING -> COMPRESSOR DOES NOT RUN IN AUTO, BI-LEV & DEF MODES -> COMPRESSOR RUNS IN ECON & OFF MODES -> DIGITAL CLIMATE CONTROL, QUICK CHECK -> ELECTRICAL SYSTEM VOLTAGE DISPLAY, CHECKING -> ELECTRONIC THERMOSWITCH (MULTI-FUNCTION TEMPERATURE SENSOR), CHECKING -> ENGINE COOLANT TEMPERATURE SENSOR, CHECKING -> ERROR DISPLAY, MEMORY CHANNEL 1 -> ERRORS IN AREA OF CLIMATE CONTROL REGULATION -> FAULT MEMORY CANNOT BE INITIATED/OUTSIDE TEMPERATURE CANNOT BE DISPLAYED -> FRESH AIR BLOWER DOES NOT RUN (AUTO, BI-LEV, DEF OR ECON MODES) -> FRESH AIR BLOWER SPEED CANNOT BE REGULATED -> IDLE SPEED INCREASE (A/C ON) & RPM INCREASE (COMPRESSOR ON), CHECKING -> INSIDE TEMPERATURE SENSORS (G56 & G86), CHECKING -> KICK-DOWN SWITCH, CHECKING -> MEMORY DISPLAY CHANNEL 17, CHECKING -> MEMORY DISPLAY CHANNEL 18, CHECKING -> MEMORY DISPLAY CHANNEL 7, CHECKING -> MEMORY DISPLAY, CHANNELS 1-22 -> OUTSIDE TEMPERATURE SENSORS (G57 & G17), CHECKING -> RADIATOR COOLING FAN ALWAYS RUNS AT FIRST SPEED (ECON & OFF MODES) -> RADIATOR COOLING FAN DOES NOT RUN AT FIRST SPEED (AUTO, BI-LEV & DEF MODES) -> SPEED DEPENDENT BLOWER CONTROL, CHECKING -> TEMPERATURE REGULATING FLAP SERVO MOTOR (w/FEEDBACK POTENTIOMETER), CHECKING -> VACUUM UNITS & FLAP POSITIONS, CHECKING
Vehicle: 1991 Audi 80 Quattro 2.3 L5 GAS
DIGITAL CLIMATE CONTROL, QUICK CHECK
Test steps must be followed in their entirety and in sequence.
- Turn ignition switch to On position, then set mode to OFF position and observe that OFF LED lamp lights.
- If OFF LED lamp does not light up, refer to "A/C Control Head Always Dark."
- If OFF LED lamp lights up, press OUTSIDE TEMP button and observe that outside temperature is displayed.
- If outside temperature is not displayed, refer to "Outside Temperature Cannot Be Called Up."
- If outside temperature is displayed, observe that outside ...
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A/C & HEATER SERVICE PROCEDURES FOR 1991 Audi 80 Quattro AUTOMOBILES
Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1991 Audi 80 Quattro cars and light trucks from 1990+
A/C & Cooling System Maintenance -> Audi -> 1990-96
Vehicle: 1991 Audi 80 Quattro 2.3 L5 GAS
CLICK HERE TO GET FULL ACCESS TO 1991 Audi 80 Quattro A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 1991 Audi 80 Quattro AUTOMOBILES
Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1991 Audi 80 Quattro cars and light trucks from 1990+
Imported Cars & Light Trucks & Vans -> 1991-92 -> Discharging System
Vehicle: 1991 Audi 80 Quattro 2.3 L5 GAS
The use of refrigerant recovery and recycling stations allows the recovery and reuse of refrigerant after contaminants and moisture have been removed.
When using a recovery or recycling station, follow the manufacturer's operating instructions, noting the following:
- Use extreme caution and observe all safety and service precautions related to use of refrigerants.
- Connect refrigerant recycling station hose(s) to vehicle A/C service port(s) and recovery station inlet fitting. Hoses used should have shutoff devices or check valve within 12 inches of hose e...
CLICK HERE TO GET FULL ACCESS TO 1991 Audi 80 Quattro A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 1991 Audi 80 Quattro AUTOMOBILES
Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1991 Audi 80 Quattro cars and light trucks from 1990+
Imported Cars & Light Trucks & Vans -> 1991-92 -> Evacuating System
Vehicle: 1991 Audi 80 Quattro 2.3 L5 GAS
The system must be completely discharged before evacuation. After discharging the system, keep low pressure gauge hose connected to low pressure test fitting and both manifold gauge valves closed.
- Connect high pressure gauge hose to vacuum pump, Fig. .
- Connect center manifold gauge hose to refrigerant source with tapping valve closed.
- Open high and low side gauge valves with vacuum pump operating.
- Continue to operate pump for approximately 15-20 minutes after low side gauge reaches 29 or more inches of vacuum. If the system has been left open for an...
CLICK HERE TO GET FULL ACCESS TO 1991 Audi 80 Quattro A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 1991 Audi 80 Quattro AUTOMOBILES
Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1991 Audi 80 Quattro cars and light trucks from 1990+
Audi -> Component Replacement & Adjustment -> WATER PUMP, REPLACE -> 2.0L/4-121 ENGINES -> 2.22L/5-136 20V TURBO & 2.3L/5-141 20V DOHC ENGINES -> 2.22L/5-136 TURBO & 2.3L/5-141 ENGINES
Vehicle: 1991 Audi 80 Quattro 2.3 L5 GAS
2.0L/4-121 ENGINES
- Drain cooling system.
- Loosen alternator adjusting bolt, then remove alternator drive belt.
- Remove water pump pulley attaching bolts, then the pulley.
- Remove water pump to housing attaching bolts, then the water pump.
- Reverse procedure to install.
2.22L/5-136 20V TURBO & 2.3L/5-141 20V DOHC ENGINES
- Drain cooling system.
- Remove timing belt. Refer to "MOTOR's Imported Car Repair Manual" for replace...
CLICK HERE TO GET FULL ACCESS TO 1991 Audi 80 Quattro A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 1991 Audi 80 Quattro AUTOMOBILES
Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1991 Audi 80 Quattro cars and light trucks from 1990+
Air Bag System Precautions -> Audi -> Arming -> Air Bag II & III System -> Air Bag V System
Vehicle: 1991 Audi 80 Quattro 2.3 L5 GAS
Air Bag II & III System
- Connect voltage supply connector.
- Connect battery ground cable.
- Turn ignition On. Air bag indicator lamp should light for approximately 10 seconds, then go off.
- If air bag indicator lamp does not light or remains lit after approximately 10 seconds, an air bag system faul...
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