Section 171 (MULTIPORT Fuel Injection (MFI) - 4.2L V8 5V - BCY)
WARNING: This page is about a different car, the 2003 Audi RS 6. However, it is still accessible from the selected car via links, so may be relevant.
- Multi Port Fuel Injection (MFI)
- Motronic injection system, servicing
- Safety precautions
- Rules for cleanliness
- Technical data
- Component locations
- Notes
- Part 2
- Installed location of Throttle Position (TP) sensor -G79- and Sender -2- for accelerator pedal position -G185-
- Installed location of Fuel Pump (FP) relay -J17-
- Installed location of Fuel pump control module -J534-
- Installed location of oxygen sensors, cylinder bank 1
- Installed location of oxygen sensors, cylinder bank 2
- Installed location of Engine speed (RPM) sensor -G28-, item -1- and vehicle speed sensor, item -2-
- Installed location of Brake booster pressure sensor -G294-
- Installed location of Brake system vacuum pump -V192-
- Air cleaner, disassembling and assembling
- Mass air flow sensor oil seals, replacing
- Wiring and component check using test box V.A.G 1598/31
- Motronic Engine Control Module (ECM) -J220-, replacing
- Idle speed, checking
- Fuel pressure regulator and holding pressure, checking
- Injectors, checking
- Fuel rail with injectors, disassembling and assembling
- Injection quantity, freedom from leaks and spray pattern of injectors, checking
- Fuel rail, removing and installing
- Fuel pump relay -J17-, checking and checking actuation
- Fuel pump control module -J538-, checking
- Control module power supply, checking
- Mass Air Flow (MAF) sensor -G70- and Mass Air Flow (MAF) sensor 2 -G246-, checking
- Intake system, checking for leaks (unmetered air)
- Intake manifold, removing and installing
- Oxygen sensor control, checking
- Oxygen sensor control function
- Oxygen sensor control / Heated Oxygen Sensor (HO2S) -G39- and Heated Oxygen Sensor (HO2S) 2 -G108-, checking
- Special tools and equipment required
- Requirements
- Work sequence
- Explanatory notes on 3-position display in display group 30
- Checking oxygen sensor learned values and control
- If reading in display zone 1 or 3 (display group 33) does not match specification or if value does not fluctuate by at least 2 %:
- Evaluation of display group 32
- Evaluation of display group 33
- Heated Oxygen Sensor (HO2S) -G39- and Heated Oxygen Sensor (HO2S) 2 -G108-, checking aging
- Oxygen sensor control / Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130 - and O2S 2 Behind TWC -G131-, checking
- Oxygen sensor heating, checking
- Notes
- Requirement
- Work sequence
- Checking power supply for oxygen sensor heating
- Oxygen sensor upstream of catalytic converter: Bank 1 (Heated Oxygen Sensor -G39-, B1-S1):
- Oxygen sensor upstream of catalytic converter: Bank 2 (Heated Oxygen Sensor 2 -G108-, B2-S1):
- Oxygen sensor downstream of catalytic converter: Bank 1 (Oxygen Sensor Behind Three Way Catalytic Converter -G130-, B1-S2):
- Oxygen sensor downstream of catalytic converter: Bank 2 (Oxygen Sensor 2 Behind Three Way Catalytic Converter -G131- B2-S2):
- Oxygen sensor signal wire and actuation, checking
- Notes
- Checking oxygen sensor wiring, bank 1 sensor 1, Heated Oxygen Sensor (HO2S) -G39-
- Checking oxygen sensor wiring, bank 1 sensor 2, Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-
- Checking oxygen sensor wiring, bank 2 sensor 1, Heated Oxygen Sensor (HO2S) 2 -G108-
- Checking oxygen sensor wiring, bank 2 sensor 2, Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-
- Oxygen sensors, removing and installing
- Evaporative Emissions (EVAP) system
- Electronic Power Control (EPC) system
- Functional description of EPC system
- Electronic Power Control (EPC) warning lamp -K132- in instrument cluster
- Electronic Power Control (EPC) warning lamp -K132-, checking
- Throttle valve control module -J338 -, checking
- Throttle valve control module -J338 -, adaptation
- Angle sensor 1 for throttle drive -G187- and Angle sensor 2 for throttle drive -G188-, checking
- Throttle Position (TP) sensor -G79- and Sender -2- for accelerator pedal position -G185-, checking
- Kickdown function adaptation
- Brake light switch -F- and Brake pedal switch -F47-, checking
- Cruise control system (CCS), checking
- Additional signals, checking
- Motronic injection system, servicing