2.8L - Fuel Injection Ignition, Engine Code(S): AFP (A4 Platform)
- 01 On Board Diagnostic (OBD)
- On Board Diagnostic (OBD)
- On Board Diagnostic (OBD), features
- Malfunction Indicator Lamp (MIL), significance
- Malfunction Indicator Lamp (MIL) (through m.y. 1999), checking
- Malfunction Indicator Lamp (MIL) (from m.y. 2000), checking
- Electronic Power Control (EPC) warning lamp in instrument cluster (through m.y. 1999), significance
- Electronic Power Control (EPC) warning lamp in instrument cluster (from m.y. 2000), significance
- On Board Diagnostic (OBD), technical data
- Scan Tool (ST) VAG 1551 , connecting and selecting functions
- Vehicle diagnostic, testing and information system VAS 5051 , connecting and selecting engine control module
- Diagnostic Trouble Code (DTC) memory
- Diagnostic Trouble Code (DTC) table: SAE P0 codes
- Diagnostic Trouble Code (DTC) table: SAE P1 codes
- Output Diagnostic Test Mode (DTM) (scan tool function 03)
- Output Diagnostic Test Mode (DTM), activating
- Notes
- Requirements
- Work sequence
- Activating Evaporative Emissions (EVAP) canister purge regulator valve N80
- Activating Secondary Air Injection (AIR) solenoid valve N112
- Activating Secondary Air Injection (AIR) pump relay J299
- Activating Intake Manifold change-over valve N156
- Activating Leak Detection Pump (LDP) V144 :
- Output Diagnostic Test Mode (DTM), activating
- Readiness code
- Read Measuring Value Block (scan tool function 08)
- On Board Diagnostic (OBD)
- 24 Multiport Fuel Injection (MFI)
- Fuel injection system, servicing
- Component locations, overview
- Fuel injection and ignition, general information
- Fuel injection system components, removing and installing
- Intake manifold upper section, disassembling and assembling
- Intake manifold (lower section), disassembling and assembling
- Air cleaner, removing and installing
- Safety precautions
- Rules of cleanliness
- Technical data
- Fuel injection system components, checking
- Heated Oxygen Sensor (HO2S) G39 , checking
- Heated Oxygen Sensor (HO2S) after Three Way Catalytic Converter (TWC), checking
- Mass Air Flow (MAF) Sensor G70 , checking
- Throttle valve control module J338 , checking
- Engine Coolant Temperature (ECT) sensor, checking
- Intake air temperature sensor G42 , checking
- Engine speed (RPM) sensor G28 , checking
- Fuel injectors, checking
- Fuel pressure regulator and residual pressure, checking
- Intake Manifold change-over valve N156 , checking
- Intake air system, checking for leaks (unmetered air)
- Functions, checking
- Idle speed, checking
- Oxygen sensor and oxygen sensor control before Three Way Catalytic Converter (TWC), checking
- Notes
- Requirements
- Functional check
- Explanation of 3 digit number block in display field 1
- Continuation
- Evaluating display field 32, display field 1: Oxygen sensor learned values before Three Way Catalytic Converter (TWC)
- Possible causes of malfunction if oxygen sensor control frequency is too slow:
- Checking oxygen sensor wiring for oxygen sensor 1
- Oxygen sensor and oxygen sensor control after Three Way Catalytic Converter (TWC), checking
- Notes
- Requirements
- Functional check
- Explanation of 3 digit number block in display field 2
- Continuation
- Evaluating display group 36, display field 1 - Oxygen sensor voltage oxygen sensor after catalyst
- Possible causes of malfunction if O2S sensor control frequency is too slow:
- Checking basic voltage for oxygen sensor 2
- Checking oxygen sensor wiring, oxygen sensor 2
- Oxygen sensor 1 aging, checking
- Engine operating mode, checking
- Engine Control Module (ECM)
- Additional signals, checking
- CAN-Bus, checking
- Fuel injection system, servicing
- 28 Ignition/Glow plug system
- Ignition system, servicing