Repair and Diagnosis

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• Quick Lookups
  • Common Specs & Procedures
  • Electrical Component Locations
    • Q4 E-Tron SPORTBACK - Component Locations
  • Fluids
  • Technical Bulletins
    • Campaigns
    • Safety Recalls
    • Technical Service Bulletins
  • Tire Fitment
  • Wiring Diagrams
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
    • Wires
    • Wiring
• Accessories & Equipment
  • Anti-Theft Systems
    • Front Doors, Door Components And Central Locking
    • Interior Lights, Lamps And Switches
    • Interior Lights, Switches
  • Collision/Avoidance
    • Driver Assistance Systems
  • Communication Devices
    • General, Technical Data - Communication
  • Drivers Assistance Systems - ADAS
    • 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
  • Infotainment
    • Communication
  • Interior/Exterior Trim
    • Exterior Equipment
    • General Technical Data - Body Exterior
    • General, Technical Data - Body Interior
    • Interior Equipment
    • Interior Trim
  • Mirrors
    • Exterior Equipment
    • Interior Equipment
  • Seats
    • General, Technical Data - Seats
    • Seat Frames
    • Seat Upholstery, Covers
  • Warning Systems
    • Driver Assistance Systems
  • Window Motors & Regulators
    • Front Doors, Door Components And Central Locking
    • Rear Doors/Door Components
    • Windows
  • Wiper/Washer Systems
    • Windshield Washer System
    • Wiper/Washer Systems
• Body & Frame
  • Door Locks
    • Front Doors, Door Components And Central Locking
    • Interior Lights, Lamps And Switches
    • Interior Lights, Switches
  • Exterior Body Panels
    • Body Front
    • Bumper
    • Covers And Lids
    • Exterior Equipment
    • Front Doors, Door Components And Central Locking
    • Rear Doors/Door Components
  • Exterior/Interior Trim
    • Exterior Equipment
    • General Technical Data - Body Exterior
    • General, Technical Data - Body Interior
    • Interior Equipment
    • Interior Trim
  • Mirrors
    • Exterior Equipment
    • Interior Equipment
  • Seats
    • General, Technical Data - Seats
    • Seat Frames
    • Seat Upholstery, Covers
  • Sun Roof/T-Top/Convertible Top
    • Sliding/Tilting Sunroof
  • Windows
    • Front Doors, Door Components And Central Locking
    • Rear Doors/Door Components
    • Windows
• Brakes
  • Anti-Lock Brakes
    • Antilock Brake System
  • Brakes Control Systems
    • General, Technical Data - Brake System
  • Mechanical - Hydraulic
    • General, Technical Data - Brake System
    • Hydraulic Components (Brakes)
    • Mechanical Components (Brakes)
  • Parking Brake System
    • Mechanical Components (Brakes)
  • Traction Control
    • Antilock Brake System
• Drivelines & Axles
  • Axle Shafts
    • Final Drive, Differential - Front Transmission, 0MJ
    • Final Drive, Differential - Rear Transmission, 0MH
  • Differentials & Drive Axles
    • Final Drive, Differential - Front Transmission, 0MJ
    • Final Drive, Differential - Rear Transmission, 0MH
• Electrical
  • Body Electrical
    • General, Technical Data - Electrical Equipment
    • Wires
    • Wiring
  • Charging Systems
    • Battery, Starter, Generator, Cruise Control
    • Starter, Generator And Cruise Control
  • Q4 E-Tron SPORTBACK - Component Locations
  • Fuses & Circuit Breakers
    • Wires
    • Wiring
  • Gauges
    • Instruments
    • Interior Equipment
  • Motors, Switches, Relays
    • General, Technical Data - Electrical Equipment
    • Wires
    • Wiring
  • Wiring Diagrams
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
    • Wires
    • Wiring
• Engine Mechanical
  • Exhaust
    • General Information
    • General Technical Data - Body Exterior
    • General, Technical Data - Body Interior
    • General, Technical Data - Brake System
    • General, Technical Data - Communication
    • General, Technical Data - Driver Assistance Systems
    • General, Technical Data - Electric Drive Motor 0EH, 0EJ
    • General, Technical Data - Electrical Equipment
    • General, Technical Data - Front Transmission, 0MJ
    • General, Technical Data - Heating, Ventilation And Air Conditioning
    • General, Technical Data - High-Voltage Battery
    • General, Technical Data - High-Voltage Vehicle General Information
    • General, Technical Data - Rear Transmission, 0MH
    • General, Technical Data - Refrigerant R1234YF Servicing
    • General, Technical Data - Refrigerant R744 General Information
    • General, Technical Data - Safety Precautions And Repair Information
    • General, Technical Data - Seats
    • General, Technical Data - Suspension, Wheels, Steering
  • Mechanical
    • General Information
    • General Technical Data - Body Exterior
    • General, Technical Data - Body Interior
    • General, Technical Data - Brake System
    • General, Technical Data - Communication
    • General, Technical Data - Driver Assistance Systems
    • General, Technical Data - Electric Drive Motor 0EH, 0EJ
    • General, Technical Data - Electrical Equipment
    • General, Technical Data - Front Transmission, 0MJ
    • General, Technical Data - Heating, Ventilation And Air Conditioning
    • General, Technical Data - High-Voltage Battery
    • General, Technical Data - High-Voltage Vehicle General Information
    • General, Technical Data - Rear Transmission, 0MH
    • General, Technical Data - Refrigerant R1234YF Servicing
    • General, Technical Data - Refrigerant R744 General Information
    • General, Technical Data - Safety Precautions And Repair Information
    • General, Technical Data - Seats
    • General, Technical Data - Suspension, Wheels, Steering
• 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)
    • Map - Heating, Ventilation, & Air Conditioning
  • Identification
    • CANADIAN Model Cross-Reference
  • Metric Conversions
    • Engine Displacement Conversion Table - ECAT
    • Metric Conversions
  • OEM General Information
    • 2022 AUDI Service
    • 2023 AUDI Service
  • Specifications Index
    • Common Specs & Procedures
  • Steering
    • Map - Steering, Suspension, Wheel Alignment, Wheels & Tires
    • Wheel Alignment Theory & Operation - General Information
  • Traction Control Disable Procedures
  • Trouble Shooting - Manual Transmission - General Information
• Heating, Ventilation & A/C (HVAC)
  • General Servicing
    • General, Technical Data - Refrigerant R1234YF Servicing
    • General, Technical Data - Refrigerant R744 General Information
  • HVAC Control Systems
    • Air Conditioning - Heating, Ventilation And Air Conditioning
    • Air Conditioning - Refrigerant R1234YF Servicing (1 Of 2)
    • Air Conditioning - Refrigerant R1234YF Servicing (2 Of 2)
    • Air Conditioning - Refrigerant R744 General Information
    • General, Technical Data - Refrigerant R744 General Information
• Hybrid/Electric Powertrain
  • Battery Management Systems
    • Electric Drive - Electric Drive Motor 0EH, 0EJ
    • Electric Drive - High-Voltage Battery
    • General Information
    • General Technical Data - Body Exterior
    • General, Technical Data - Body Interior
    • General, Technical Data - Brake System
    • General, Technical Data - Communication
    • General, Technical Data - Driver Assistance Systems
    • General, Technical Data - Electric Drive Motor 0EH, 0EJ
    • General, Technical Data - Electrical Equipment
    • General, Technical Data - Front Transmission, 0MJ
    • General, Technical Data - Heating, Ventilation And Air Conditioning
    • General, Technical Data - High-Voltage Battery
    • General, Technical Data - High-Voltage Vehicle General Information
    • General, Technical Data - Rear Transmission, 0MH
    • General, Technical Data - Refrigerant R1234YF Servicing
    • General, Technical Data - Refrigerant R744 General Information
    • General, Technical Data - Safety Precautions And Repair Information
    • General, Technical Data - Seats
    • General, Technical Data - Suspension, Wheels, Steering
  • Cooling Systems
    • Cooling System - Electric Drive Motor 0EH, 0EJ
  • Electric Converters and Controllers
    • Electric Drive - Electric Drive Motor 0EH, 0EJ
    • Electric Drive - High-Voltage Battery
  • Electric Motor Systems
    • Electric Drive - Electric Drive Motor 0EH, 0EJ
    • Electric Drive - High-Voltage Battery
    • Electric Drive Motor 0EH, 0EJ, Removing And Installing
    • General, Technical Data - Electric Drive Motor 0EH, 0EJ
  • Testing and Diagnosis
    • Electric Drive - Electric Drive Motor 0EH, 0EJ
    • Electric Drive - High-Voltage Battery
• Restraints
  • Air Bag, SRS
    • Passenger Protection, Airbags, Seat Belts
  • Passive Restraints
    • Passenger Protection, Airbags, Seat Belts
• Steering
  • Manual Steering
    • Wheels, Tires, Wheel Alignment - Suspension, Wheels, Steering
  • Power Steering
    • Wheels, Tires, Wheel Alignment - Suspension, Wheels, Steering
  • Steering Column
  • Steering Gear
  • 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 - Q4 E-Tron
    • Wheels, Tires And Wheel Alignment - Wheel And Tire Guide
    • Wheels, Tires, Wheel Alignment - Suspension, Wheels, Steering
    • Wheels, Tires, Wheel Alignment - Wheel And Tire Guide General Information
  • Wheels & Tire System
    • General, Technical Data - Suspension, Wheels, Steering
• Transmission
  • Automatic Trans
    • Controls, Housing - Front Transmission, 0MJ
    • Controls, Housing - Rear Transmission, 0MH
    • General, Technical Data - Front Transmission, 0MJ
    • General, Technical Data - Rear Transmission, 0MH
  • Transmission Control Systems
    • Controls, Housing - Front Transmission, 0MJ
    • Controls, Housing - Rear Transmission, 0MH
• External Pages