Section 199 (MULTIPORT Fuel Injection (MFI), Generic Scan Tool - 4.2L V8 - Art, Awn, BBD)
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2004 Audi A6, 2003 Audi S6, 2003 Audi A6, 2002 Audi S6, and 2002 Audi A6. However, it is still accessible from the selected car via links, so may be relevant.
- Multiport Fuel Injection
- Motronic injection system, servicing
- Safety precautions
- Rules of cleanliness
- Technical data Audi A6
- Technical data Audi S6
- Overview of component locations
- Notes
- Component location, Throttle Position (TP) sensor -G79- and sender 2 for accelerator pedal position -G185-
- Component location Fuel Pump (FP) Relay -J17-
- Component location of brake light switch -F- and brake pedal switch -F47-, clutch vacuum vent valve switch -F36-
- Component locations in E-box, plenum chamber
- Component location of Camshaft Position (CMP) Sensor -G40-
- Component location of Camshaft Position (CMP) Sensor -G163-
- Component location of Secondary Air Injection (AIR) Solenoid Valve -N112-
- Component location of Secondary Air Injection (AIR) Pump Motor -V101-
- Fuel injectors, removing and installing
- Checking components
- Oxygen sensor heater for oxygen sensors before Three Way Catalytic Converter (TWC), checking
- Oxygen sensor heater for oxygen sensors behind Three Way Catalytic Converter (TWC), checking
- Mass Air Flow (MAF) sensor -G70-, checking
- Throttle valve control module -J338-, checking
- Engine Speed (RPM) sensor -G28-, checking
- Intake Air Temperature (IAT) sensor -G42-, checking
- Engine Coolant Temperature (ECT) sensor -G62-, checking
- Solenoid valves for camshaft adjustment, checking
- Fuel Pump (FP) Relay -J17- and activation, checking
- Recommended special tools and equipment
- Test requirements:
- Function test of Fuel Pump (FP) relay
- A - If Fuel Pump (FP) runs:
- B - If Fuel Pump (FP) does not run:
- Check voltage supply of Fuel Pump (FP) relay
- Checking activation of Fuel Pump (FP) relay
- Check voltage supply for Fuel Pump (FP) and components
- Final procedures
- Fuel pressure regulator and residual pressure, checking
- Fuel injectors, checking
- Injection quantity, proper seal and spray pattern of fuel injectors, checking
- Checking intake system for leaks (unmetered air)
- Function tests
- Oxygen sensors and oxygen sensor control before catalytic converter, checking
- Oxygen sensors and oxygen sensor control behind catalytic converter, checking
- Notes
- Recommended special tools and equipment
- Test requirements:
- Work procedure
- Checking primary voltage
- Check oxygen sensor wires for Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- (bank 1, sensor 2)
- Check oxygen sensor wires for Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G131- (bank 2, sensor 2)
- Final procedures
- Engine Control Module (ECM)
- Additional signals, checking
- Motronic injection system, servicing