Repair and Diagnosis

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• Quick Lookups
  • Common Specs & Procedures
    • Common Specifications & Procedures
  • Electrical Component Locations
    • E-Tron SPORTBACK - Component Locations
  • Fluids
  • Technical Bulletins
    • Safety Recalls
    • Technical Service Bulletins
  • Tire Fitment
  • Wiring Diagrams
    • OEM Wiring Diagrams
    • OEM WIRING DIAGRAMS DIGITAL TV TUNER , (Q0A),(Q0B),(QU1),(QV1) From January 2020
    • OEM Wiring Diagrams Electric Drive System
    • OEM Wiring Diagrams Electric Drive System For Front Axle , EASA,EASB,EAVA,EAWA,EAUA,EATA,EDEA
    • OEM Wiring Diagrams Electric Drive System For Rear Axle , EASA,EASB,EAWA,EDEA
    • OEM Wiring Diagrams Electric Drive System For Rear Axle , EAVA
    • OEM Wiring Diagrams High-Voltage Battery Charging , (EK1)
    • OEM Wiring Diagrams High-Voltage Battery System
    • OEM Wiring Diagrams High-Voltage System
    • OEM WIRING DIAGRAMS INFOTAINMENT MOST BUS August 2020
    • OEM WIRING DIAGRAMS INFOTAINMENT MOST BUS From October 2018
    • OEM WIRING DIAGRAMS INSTRUMENT CLUSTER From August 2020
    • OEM WIRING DIAGRAMS INSTRUMENT CLUSTER From October 2018
    • OEM WIRING DIAGRAMS MMI (INFORMATION ELECTRONICS 1) From August 2020
    • OEM WIRING DIAGRAMS SOUND SYSTEM , (9VS) From August 2020
    • OEM WIRING DIAGRAMS SOUND SYSTEM , (9VS) From October 2018
    • OEM Wiring Diagrams Trailer Mode, Only For Us Equipment , (5C1)
    • OEM Wiring Diagrams Wiper And Washer System, Heated Spray Nozzles, Windshield And Headlamp , (9PA)
    • OEM Wiring Diagrams Wiper And Washer System, Heated Spray Nozzles, Windshield And Headlamp , (9PF)
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
• Accessories & Equipment
  • Anti-Theft Systems
    • Front Doors, Central Locking System
    • Interior Lights, Lamps And Switches
    • Interior Lights, Switches
  • Collision/Avoidance
    • Communication
    • Driver Assistance Systems
    • General, Technical Data (Driver Assistance Systems)
  • Communication Devices
    • General, Technical Data (Communication)
  • Cruise Control Systems
    • Charging System (Battery, Starter, Generator) & Cruise Control (Adaptive Cruise Control)
    • Charging System (Battery, Starter, Generator) & Cruise Control (Battery & Charging)
    • Communication
    • Driver Assistance Systems
    • General, Technical Data (Driver Assistance Systems)
  • Drivers Assistance Systems - ADAS
    • Communication
    • Driver Assistance Systems
    • General, Technical Data (Driver Assistance Systems)
  • Entertainment Systems
    • Communication
  • Exterior Lights
    • Exterior Lights, Lamps And Switches
    • Exterior Lights, Switches
  • Gauges & Instrument Panels
    • Instruments
    • Interior Equipment
  • Headlights
    • Exterior Lights, Switches
  • Infotainment
    • Communication
    • Communication (Retrofitting)
    • Driver Assistance Systems
  • Interior/Exterior Trim
    • Exterior Equipment
    • General, Technical Data (Body Exterior)
    • Interior Equipment
    • Interior Trim
  • Interior/Illumination Lights
    • Interior Lights, Lamps And Switches
    • Interior Lights, Switches
  • Mirrors
    • Exterior Equipment
    • Interior Equipment
  • Seats
    • General, Technical Data (Seats)
    • Interior Equipment
    • Seat Frames
    • Seat Upholstery, Covers
  • Warning Systems
    • Communication
    • Driver Assistance Systems
    • Exterior Lights, Switches
  • Window Motors & Regulators
    • Exterior Equipment
    • Front Doors, Central Locking System
    • Glass, Window Regulators
    • Rear Doors
  • Wiper/Washer Systems
    • Windshield Washer System
    • Wiper/Washer Systems
  • Wiring System (Data Link Connectors, Pwr Dist., Grnd Dist.)
    • Wires
    • Wiring
• Body & Frame
  • Door Locks
    • Front Doors, Central Locking System
    • Interior Lights, Lamps And Switches
    • Interior Lights, Switches
  • Exterior Body Panels
    • Body Front
    • Bumpers
    • Exterior Equipment
    • Front Doors, Central Locking System
    • General, Technical Data (Body Exterior)
    • Hood, Lids
    • Rear Doors
  • Exterior/Interior Trim
    • Exterior Equipment
    • General, Technical Data (Body Exterior)
    • Interior Equipment
    • Interior Trim
  • Mirrors
    • Exterior Equipment
    • Interior Equipment
  • Seats
    • General, Technical Data (Seats)
    • Interior Equipment
    • Seat Frames
    • Seat Upholstery, Covers
  • Sun Roof/T-Top/Convertible Top
    • Sunroof
  • Windows
    • Exterior Equipment
    • Front Doors, Central Locking System
    • Glass, Window Regulators
    • Rear Doors
• Brakes
  • Anti-Lock Brakes
    • Antilock Brake System
  • Mechanical - Hydraulic
    • General, Technical Data (Brake System)
    • Hydraulic Components (Brake System)
    • Mechanical Components (Brake System)
  • Parking Brake System
    • General, Technical Data (Brake System)
    • Mechanical Components (Brake System)
  • Traction Control
    • Antilock Brake System
• Drivelines & Axles
  • Axle Shafts
    • Final Drive, Differential (Electric Drive Motor 0EF)
    • Final Drive, Differential (Rear Transmission 0MB, 0MC)
    • Front Suspension
    • Rear Suspension
  • Differentials & Drive Axles
    • Final Drive, Differential (Electric Drive Motor 0EF)
    • Final Drive, Differential (Rear Transmission 0MB, 0MC)
    • Gears, Shafts
• Electrical
  • Body Electrical
    • General, Technical Data (Electrical Equipment)
    • Wires
    • Wiring
  • Charging Systems
    • Charging System (Battery, Starter, Generator) & Cruise Control (Adaptive Cruise Control)
    • Charging System (Battery, Starter, Generator) & Cruise Control (Battery & Charging)
    • General, Technical Data (Electrical Equipment)
  • E-Tron SPORTBACK - Component Locations
  • Fuses & Circuit Breakers
    • Wires
    • Wiring
  • Gauges
    • Instruments
    • Interior Equipment
  • Motors, Switches, Relays
    • General, Technical Data (Electrical Equipment)
    • Wires
    • Wiring
  • Starter
    • Charging System (Battery, Starter, Generator) & Cruise Control (Adaptive Cruise Control)
    • Charging System (Battery, Starter, Generator) & Cruise Control (Battery & Charging)
  • Wiring Diagrams
    • OEM Wiring Diagrams
    • OEM WIRING DIAGRAMS DIGITAL TV TUNER , (Q0A),(Q0B),(QU1),(QV1) From January 2020
    • OEM Wiring Diagrams Electric Drive System
    • OEM Wiring Diagrams Electric Drive System For Front Axle , EASA,EASB,EAVA,EAWA,EAUA,EATA,EDEA
    • OEM Wiring Diagrams Electric Drive System For Rear Axle , EASA,EASB,EAWA,EDEA
    • OEM Wiring Diagrams Electric Drive System For Rear Axle , EAVA
    • OEM Wiring Diagrams High-Voltage Battery Charging , (EK1)
    • OEM Wiring Diagrams High-Voltage Battery System
    • OEM Wiring Diagrams High-Voltage System
    • OEM WIRING DIAGRAMS INFOTAINMENT MOST BUS August 2020
    • OEM WIRING DIAGRAMS INFOTAINMENT MOST BUS From October 2018
    • OEM WIRING DIAGRAMS INSTRUMENT CLUSTER From August 2020
    • OEM WIRING DIAGRAMS INSTRUMENT CLUSTER From October 2018
    • OEM WIRING DIAGRAMS MMI (INFORMATION ELECTRONICS 1) From August 2020
    • OEM WIRING DIAGRAMS SOUND SYSTEM , (9VS) From August 2020
    • OEM WIRING DIAGRAMS SOUND SYSTEM , (9VS) From October 2018
    • OEM Wiring Diagrams Trailer Mode, Only For Us Equipment , (5C1)
    • OEM Wiring Diagrams Wiper And Washer System, Heated Spray Nozzles, Windshield And Headlamp , (9PA)
    • OEM Wiring Diagrams Wiper And Washer System, Heated Spray Nozzles, Windshield And Headlamp , (9PF)
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
• Engine Mechanical
  • Exhaust
    • General, Technical Data (Electric Drive Motor 0EF)
    • General, Technical Data (High-Voltage Battery)
  • Mechanical
    • General, Technical Data (Electric Drive Motor 0EF)
    • General, Technical Data (High-Voltage Battery)
  • Starter
    • Charging System (Battery, Starter, Generator) & Cruise Control (Adaptive Cruise Control)
    • Charging System (Battery, Starter, Generator) & Cruise Control (Battery & Charging)
• Engine Performance
  • Emissions
    • Emission Control Abbreviations
    • State Emission Standards - Diesel
    • State Emission Standards - Gas
  • Specifications
    • Firing Order & Cylinder Identification
• General Information
  • Abbreviations
    • Commonly Used Abbreviations - General Information
    • Emission Control Abbreviations
  • Basic Trouble Shooting
    • Basic Trouble Shooting - General Information
    • Commonly Used Abbreviations - General Information
    • Emission Control Abbreviations
    • Engine Performance - Trouble Shooting - General Information
  • Brakes
    • Anti-Lock Brake Safety Precautions - General Information
    • Map - Brake Systems
    • Map - Routine Inspection Reference Guide
  • Check Lists
    • Symptom Check List Worksheet - General Information
  • Driveline/Axles
    • Drive Axle Noise Diagnosis - General Information
    • Gear Tooth Contact Patterns - General Information
    • Map - Drive Train & Transmission
    • Trouble Shooting - Clutches - General Information
  • Electrical
    • Map - Electrical Systems
    • Using lemon2025'S System Wiring Diagrams
  • Engine
    • Engine Overhaul Procedures - General Information
    • General Cooling System Service - General Information
  • Engine Performance
    • Electrostatic Discharge Warning - General Information
    • Engine Performance Diagnostic Routine Outline - General Information
    • Engine Performance Safety Precautions
    • Map - Engine Performance & Maintenance
    • Parasitic Load Explanation & Test Procedures - General Information
    • State Emission Standards - Diesel
    • State Emission Standards - Gas
    • Waveforms - Injector Pattern Tutorial - General Information
  • Map - Exhaust Systems
  • Heating, Ventilation & A/C (HVAC)
    • General Technical Data (HVAC)
    • Map - Heating, Ventilation, & Air Conditioning
  • Hoist/Jack
    • General Information
  • Identification
    • CANADIAN Model Cross-Reference
    • General Information
  • Metric Conversions
    • Engine Displacement Conversion Table - ECAT
    • Metric Conversions
  • OEM General Information
    • General Information
    • General Technical Data (HVAC)
    • General, Technical Data (High-Voltage Vehicle General Information)
  • Reset Procedures
    • General Information
  • Specifications Index
    • Common Specifications & Procedures
  • Steering
    • Map - Steering, Suspension, Wheel Alignment, Wheels & Tires
    • Wheel Alignment Theory & Operation - General Information
  • Towing
    • General Information
  • Traction Control Disable Procedures
  • Trouble Shooting - Manual Transmission - General Information
• Heating, Ventilation & A/C (HVAC)
  • General Servicing
    • General Technical Data (HVAC)
    • General, Technical Data (Refrigerant R1234YF Servicing)
  • HVAC Control Systems
    • A/C System
    • A/C System (Refrigerant Circuit)
    • Air Conditioning (Refrigerant R1234YF Servicing) (Refrigerant Circuit)
    • Air Conditioning (Refrigerant R1234YF Servicing) (Tools & Testing Equipment)
    • Air Conditioning (Refrigerant R134A Servicing) (Pressures, Checking)
    • Air Conditioning (Refrigerant R134A Servicing) (Refrigerant Circuit)
    • General, Technical Data (Refrigerant R1234YF Servicing)
    • Heating
• Hybrid/Electric Powertrain
  • Battery Management Systems
    • Electric Drive (Electric Drive Motor 0EF)
    • Electric Drive (High-Voltage Battery)
    • General, Technical Data (Electric Drive Motor 0EF)
    • General, Technical Data (High-Voltage Battery Danger Classification)
    • General, Technical Data (High-Voltage Battery)
    • General, Technical Data (High-Voltage Vehicle General Information)
    • General, Technical Data (Rear Transmission 0MB, 0MC)
  • Cooling Systems
    • Cooling System
    • General, Technical Data (High-Voltage Battery)
  • Electric Converters and Controllers
    • Controls, Housing (Rear Transmission 0MB, 0MC)
    • Electric Drive (Electric Drive Motor 0EF)
    • Electric Drive (High-Voltage Battery)
    • Final Drive, Differential (Electric Drive Motor 0EF)
    • Final Drive, Differential (Rear Transmission 0MB, 0MC)
    • General, Technical Data (Electric Drive Motor 0EF)
    • General, Technical Data (High-Voltage Battery Danger Classification)
    • General, Technical Data (High-Voltage Battery)
    • General, Technical Data (High-Voltage Vehicle General Information)
  • Electric Motor Systems
    • Controls, Housing (Front Transmission, 0MA)
    • Controls, Housing (Rear Transmission 0MB, 0MC)
    • Electric Drive (Electric Drive Motor 0EF)
    • Electric Drive (High-Voltage Battery)
    • Engine Assembly
    • Final Drive, Differential (Electric Drive Motor 0EF)
    • Final Drive, Differential (Rear Transmission 0MB, 0MC)
    • General, Technical Data (Electric Drive Motor 0EF)
    • General, Technical Data (Front Transmission, 0MA)
    • General, Technical Data (High-Voltage Battery Danger Classification)
    • General, Technical Data (High-Voltage Battery)
    • General, Technical Data (High-Voltage Vehicle General Information)
    • General, Technical Data (Rear Transmission 0MB, 0MC)
  • Testing and Diagnosis
    • Electric Drive (Electric Drive Motor 0EF)
    • Electric Drive (High-Voltage Battery)
• Maintenance
  • Procedures
    • General Information
    • Maintenance, Diagnosis (Fluid Capacity Tables)
• Restraints
  • Air Bag, SRS
    • General, Technical Data (Body Interior)
    • Passenger Protection, Airbags, Seat Belts
  • Passive Restraints
    • General, Technical Data (Body Interior)
    • Interior Equipment
    • Passenger Protection, Airbags, Seat Belts
• Steering
  • Manual Steering
  • Power Steering
  • Steering Column
  • Steering Gear
    • General, Technical Data (Suspension, Wheels, Steering)
    • Steering
  • Steering Linkage
• Suspension
  • Electronic Suspension
    • Self-Leveling Suspension
  • Front Suspension
    • Front Suspension
    • General, Technical Data (Suspension, Wheels, Steering)
  • Rear Suspension
    • General, Technical Data (Suspension, Wheels, Steering)
    • Rear Suspension
  • Wheel Alignment
    • AUDI Wheel Alignment Specifications - A3 SPORTBACK E-Tron
    • General, Technical Data (Suspension, Wheels, Steering)
    • Wheels, Tires, Wheel Alignment (Suspension, Wheels, Steering)
  • Wheels & Tire System
    • General, Technical Data (Suspension, Wheels, Steering)
    • Wheels, Tires And Wheel Alignment (Wheel And Tire Guide General Information)
    • Wheels, Tires, Wheel Alignment (Suspension, Wheels, Steering)
    • Wheels, Tires, Wheel Alignment (Wheel And Tire Guide)
• Transmission
  • Automatic Trans
    • Controls, Housing (Front Transmission, 0MA)
    • Controls, Housing (Rear Transmission 0MB, 0MC)
    • Gears, Shafts
    • General, Technical Data (Front Transmission, 0MA)
    • General, Technical Data (Rear Transmission 0MB, 0MC)
  • Manual Trans
    • Gears, Shafts
  • Transmission Control Systems
    • Controls, Housing (Front Transmission, 0MA)
    • Controls, Housing (Rear Transmission 0MB, 0MC)
    • General, Technical Data (Front Transmission, 0MA)
    • General, Technical Data (Rear Transmission 0MB, 0MC)
• External Pages