Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2018 Audi TT Quattro Base, 2D ConvertibleFACTORY OEM SERVICE PROCEDURE
Repair and Diagnosis
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Quick Lookups
- Accessories & Equipment
- Anti-Theft Systems
- Collision/Avoidance
- Communication Devices
- Cruise Control Systems
- Drivers Assistance Systems - ADAS
- Entertainment Systems
- Exterior Lights
- Gauges & Instrument Panels
- Infotainment
- Interior/Exterior Trim
- Interior/Illumination Lights
- Mirrors
- Seats
- Window Motors & Regulators
- Wiper/Washer Systems
- Wiring System (Data Link Connectors, Pwr Dist., Grnd Dist.)
- Body & Frame
- Door Locks
- Exterior Body Panels
- Body Front (1 Of 2) [Roadster]
- Body Front (2 Of 2) [Roadster]
- Bumpers (1 Of 2) [Roadster]
- Bumpers (2 Of 2) [Roadster]
- Exterior Equipment (1 Of 2) [Roadster]
- Exterior Equipment (2 Of 2) [Roadster]
- Front Doors, Central Locking System (1 Of 2) [Roadster]
- Front Doors, Central Locking System (2 Of 2) [Roadster]
- General, Technical Data (Body Exterior) (1 Of 2) [Roadster]
- General, Technical Data (Body Exterior) (2 Of 2) [Roadster]
- Hood, Lids (1 Of 2) [Roadster]
- Hood, Lids (2 Of 2) [Roadster]
- Exterior/Interior Trim
- Mirrors
- Seats
- Sun Roof/T-Top/Convertible Top
- Windows
- Brakes
- Drivelines & Axles
- Electrical
- Engine Mechanical
- Blowers, Superchargers & Turbochargers
- Cooling Fan
- Cooling System (Mechanical)
- Exhaust
- Exhaust System, Emission Controls [CNTC,CYFB] (1 Of 2) [Roadster]
- Exhaust System, Emission Controls [CNTC,CYFB] (2 Of 2) [Roadster]
- General, Technical Data [CNTC,CYFB] (1 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (2 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (3 Of 3) [Roadster]
- Technical Data (Oil Gauge Tester T40178 Service Values) [Roadster]
- Fuel System
- Fuel Supply (Fuel System EVAP Leak Test) [Roadster]
- Fuel Supply [CNTC,CYFB] [Roadster]
- General, Technical Data [CNTC,CYFB] (1 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (2 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (3 Of 3) [Roadster]
- MULTIPORT Fuel Injection [CNTC,CYFB] (1 Of 2) [Roadster]
- MULTIPORT Fuel Injection [CNTC,CYFB] (2 Of 2) [Roadster]
- Technical Data (Oil Gauge Tester T40178 Service Values) [Roadster]
- Lubrication System
- General, Technical Data [CNTC,CYFB] (1 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (2 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (3 Of 3) [Roadster]
- Lubrication [CNTC,CYFB] (1 Of 2) [Roadster]
- Lubrication [CNTC,CYFB] (2 Of 2) [Roadster]
- Technical Data (Oil Gauge Tester T40178 Service Values) [Roadster]
- Mechanical
- Crankshaft, Cylinder Block (CNTC,CYFB) (1 Of 2) [Roadster]
- Crankshaft, Cylinder Block [CNTC,CYFB] (2 Of 2) [Roadster]
- Cylinder Head, VALVETRAIN [CNTC,CYFB] (1 Of 2) [Roadster]
- Cylinder Head, VALVETRAIN [CNTC,CYFB] (2 Of 2) [Roadster]
- Engine Assembly [CNTC,CYFB] (1 Of 2) [Roadster]
- Engine Assembly [CNTC,CYFB] (2 Of 2) [Roadster]
- General, Technical Data [CNTC,CYFB] (1 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (2 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (3 Of 3) [Roadster]
- Technical Data (Oil Gauge Tester T40178 Service Values) [Roadster]
- Charging System (Battery, Starter, Generator) & Cruise Control (1 Of 2) [Roadster]
- Engine Performance
- Emissions
- Engine Control Systems
- Generic Scan Tool [CNTA,CNTC,CNSB] - Engine DTC Tables (Engine Control Module --, 2016 My) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] - Engine DTC Tables (Engine Control Module --, 2017 My) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (1 Of 5) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (2 Of 5) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (3 Of 5) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (4 Of 5) [Roadster]
- Fuel Delivery
- Fuel Supply (Fuel System EVAP Leak Test) [Roadster]
- Fuel Supply [CNTC,CYFB] [Roadster]
- General, Technical Data [CNTC,CYFB] (1 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (2 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (3 Of 3) [Roadster]
- MULTIPORT Fuel Injection [CNTC,CYFB] (1 Of 2) [Roadster]
- MULTIPORT Fuel Injection [CNTC,CYFB] (2 Of 2) [Roadster]
- Technical Data (Oil Gauge Tester T40178 Service Values) [Roadster]
- Ignition System
- General, Technical Data [CNTC,CYFB] (1 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (2 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (3 Of 3) [Roadster]
- Ignition/Glow Plug System [CNTC,CYFB] (1 Of 2) [Roadster]
- Ignition/Glow Plug System [CNTC,CYFB] (2 Of 2) [Roadster]
- Technical Data (Oil Gauge Tester T40178 Service Values) [Roadster]
- Remove, Overhaul & Install
- Specifications
- System
- Generic Scan Tool [CNTA,CNTC,CNSB] - Engine DTC Tables (Engine Control Module --, 2016 My) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] - Engine DTC Tables (Engine Control Module --, 2017 My) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (1 Of 5) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (2 Of 5) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (3 Of 5) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (4 Of 5) [Roadster]
- Testing & Diagnosis
- Generic Scan Tool [CNTA,CNTC,CNSB] - Engine DTC Tables (Engine Control Module --, 2016 My) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] - Engine DTC Tables (Engine Control Module --, 2017 My) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (1 Of 5) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (2 Of 5) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (3 Of 5) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (4 Of 5) [Roadster]
- Tune-Up
- General, Technical Data [CNTC,CYFB] (1 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (2 Of 3) [Roadster]
- General, Technical Data [CNTC,CYFB] (3 Of 3) [Roadster]
- Ignition/Glow Plug System [CNTC,CYFB] (1 Of 2) [Roadster]
- Ignition/Glow Plug System [CNTC,CYFB] (2 Of 2) [Roadster]
- Technical Data (Oil Gauge Tester T40178 Service Values) [Roadster]
- General Information
- Abbreviations
- Basic Trouble Shooting
- Brakes
- Check Lists
- Driveline/Axles
- DTC Index [CNTC] [Roadster]
- Electrical
- Engine
- 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)
- Hoist/Jack
- Identification
- Metric Conversions
- OEM General Information
- Reset Procedures
- Specifications Index
- Steering
- Towing
- Traction Control Disable Procedures
- Trouble Shooting - Manual Transmission - General Information
- Heating, Ventilation & A/C (HVAC)
- General Servicing
- HVAC Control Systems
- Air Conditioning (1 Of 2) [Roadster]
- Air Conditioning (2 Of 2) [Roadster]
- Air Conditioning (Refrigerant R1234YF Servicing) (1 Of 2) [Roadster]
- Air Conditioning (Refrigerant R1234YF Servicing) (2 Of 2) [Roadster]
- Air Conditioning (Refrigerant R134A Servicing) (1 Of 2) [Roadster]
- Air Conditioning (Refrigerant R134A Servicing) (2 Of 2) [Roadster]
- General, Technical Data (HVAC) [Roadster]
- General, Technical Data (Refrigerant R1234YF Servicing) [Roadster]
- Heating, Ventilation [Roadster]
- Maintenance
- Procedures
- General Information [Roadster]
- Maintenance Reminder Light (Reset Procedures)
- Maintenance, Diagnosis (2016 - 2017 Maintenance Schedule) [Roadster]
- Maintenance, Diagnosis (2016 Fluid Capacity Tables) [Roadster]
- Maintenance, Diagnosis (2017 - 2018 Fluid Capacity Tables) [Roadster]
- Maintenance, Diagnosis (2018 AUDI Maintenance Schedule) [Roadster]
- Maintenance, Diagnosis (Specialty Engine Oils) [Roadster]
- Maintenance, Diagnosis [Fluid Capacity Tables] [Roadster]
- Procedures
- Restraints
- Steering
- Suspension
- Transmission
- Automatic Trans
- Clutch [Roadster]
- Manual Trans
- Transmission Control Systems
- Controls, Housing [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] - Engine DTC Tables (Engine Control Module --, 2016 My) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] - Engine DTC Tables (Engine Control Module --, 2017 My) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (1 Of 5) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (2 Of 5) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (3 Of 5) [Roadster]
- Generic Scan Tool [CNTA,CNTC,CNSB] (4 Of 5) [Roadster]
- External Pages
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
