1.8L - Turbo Fuel Injection & Ignition, Engine Code(S): Amu

• 01 On Board Diagnostic (OBD)
  • Motronic, On Board Diagnostic (OBD)
    • On Board Diagnostic (OBD), technical data
    • Significance of Malfunction Indicator Lamp (MIL)
      • Notes
      • Function test
    • Safety precautions
    • VAS5051 vehicle diagnostic, testing and information system orVAG1551 Scan Tool (ST), connecting and selecting functions
  • Diagnostic Trouble Code (DTC) memory, checking (scan tool function 02) and erasing (scan tool function 05)
    • Diagnostic Trouble Code (DTC) memory, checking (scan tool function 02) and erasing (scan tool function 05)
      • Notes
      • Engine should run at idle
      • End Output
    • Diagnostic Trouble Code (DTC) table
  • Output Diagnostic Test Mode (DTM) (scan tool function 03)
    • Output Diagnostic Test Mode (DTM) (scan tool function 03)
  • Basic Setting (scan tool function 04)
    • Basic Setting (scan tool function 04)
  • Control module, coding (scan tool function 07)
    • Control module, coding (scan tool function 07)
    • Coding table
  • Measuring value block, reading (scan tool function 08)
    • Measuring value block, reading (scan tool function 08)
  • Readiness code
    • Readiness code
    • Readiness code, checking
    • Readiness code, generating
      • Notes
      • Work step 1: Check DTC Memory
      • Work step 2: Erase DTC Memory
      • Work step 3: Adapt throttle valve control module to Engine Control Module (ECM)
      • Work step 4: Diagnostic of tank seal
      • Work step 5: Diagnostic of tank ventilation valve
      • Work step 6: Diagnostic of fuel supply system
      • Work step 7: Checking oxygen sensor heating
      • Work step 8: Diagnostic of operational readiness of oxygen sensors behind catalytic converter
      • Work step 9: Secondary Air Injection (AIR) system diagnostic
      • Work step 10: Diagnostic of oxygen sensor aging before catalytic converter
      • Work step 11: Diagnostic oxygen sensor control system
      • Work step 12: Diagnostic of oxygen sensor aging behind catalytic converter
      • Work step 13: Diagnostic of catalytic converter
      • Work step 14: Readiness code, reading
• 24 Multiport Fuel Injection (MFI)
  • Motronic injection system, servicing
    • Safety precautions
    • Rules of cleanliness
    • Technical data
    • Overview of component locations
      • Notes
      • Installed position: Recirculating valve for turbocharger -N249-
      • Installed position: Throttle Position (TP) sensor -G79- and Sender -2- for accelerator pedal position -G185-
      • Location: Brake light switch -F- and Brake pedal switch -F47-
      • Location: EPC warning lamp -K132-
      • Location: Clutch vacuum vent valve switch -F36-
      • Location: 3-pin harness connectors
      • Installed position: Pressure switch/power steering -F88-
      • Installed position of Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC) -G130- with O2S heater 1 behind TWC -Z29- and cover for oxygen sensor harness connector
      • Installed position: Secondary Air Injection (AIR) pump relay -J299- and Motronic ECM power supply relay -J271-
    • Air cleaner housing, disassembling and assembling
    • Electrical testing using VAG1598/31 test box
    • Procedure after interruption of voltage supply
    • Engine Control Module (ECM) - without metal anti-theft housing, replacing
      • Notes
      • Removing
      • Installing
    • Engine Control Module (ECM) - with metal anti-theft housing, replacing
    • Idle speed, checking
    • System pressure, fuel pressure regulator and residual pressure, checking
    • Fuel injectors, checking
    • Fuel rail with fuel injectors, disassembling and assembling
    • Fuel injectors, removing and installing
      • Removing
      • Installing
    • Injection quantity, proper seal and spray pattern of fuel injectors, checking
    • Fuel Pump (FP) relay -J17-, checking and activating
      • Notes
      • Function test of Fuel Pump (FP) relay
      • Checking activation of Fuel Pump (FP) relay
      • Check voltage supply for Fuel Pump (FP) and components
    • Mass Air Flow (MAF) sensor -G70-, checking
      • Notes
      • Voltage supply for Mass Air Flow (MAF) sensor, checking
      • Check wiring connections for Mass Air Flow (MAF) sensor
    • Intake system, checking for leaks (unmetered air)
  • Oxygen Sensor (O2S) control, checking
    • Function of O2S control before Three Way Catalytic Converter (TWC)
    • Heated Oxygen Sensor (HO2S) and O2S control before TWC, checking
      • Notes
      • Checking oxygen sensor adaptation values and control
      • Continued
      • Checking primary voltage
      • Checking oxygen sensor wiring
    • Oxygen Sensor (O2S) aging (HO2S before TWC), checking
      • Notes
      • Continued
    • Heated Oxygen Sensor (HO2S) and O2S control after TWC, checking
      • Notes
      • Continued
      • Checking primary voltage
      • Checking oxygen sensor wiring
    • Oxygen Sensor (O2S) heating for HO2S before and after TWC, checking
      • Notes
      • Checking voltage supply for oxygen sensor heating
    • Heated Oxygen Sensor (HO2S), removing and installing
      • Notes
      • Work sequence
  • Secondary Air Injection (AIR) system, checking
    • Secondary Air Injection (AIR) system, checking
    • Secondary Air Injection (AIR) solenoid valve -N112- checking
      • Notes
      • Checking activation
    • Secondary Air Injection (AIR) pump relay -J299-, checking and activating
      • Notes
      • Checking voltage supply of Secondary Air Injection (AIR) pump relay
      • Checking activation of Secondary Air Injection (AIR) pump relay
      • Checking voltage supply of Secondary Air Injection (AIR) pump motor
  • Evaporative Emission (EVAP) system, checking
    • Evaporative Emission (EVAP) canister purge regulator valve -N80-, checking
      • Notes
      • Checking internal resistance
      • Checking voltage supply
      • Checking activation
  • Electronic Power Control (EPC) system, checking
    • EPC system, function
    • EPC warning lamp -K132- in instrument cluster, significance
    • EPC warning lamp -K132-, checking
    • Throttle valve control module -J338-, checking
    • Throttle valve control module -J338-, adapting
    • Throttle valve, checking for soiling
      • Notes
      • Checking oxygen sensor adaptation values and control
      • Work sequence
    • Throttle valve control module, cleaning
    • Angle sensors for throttle drive, checking
      • Notes
      • Checking voltage supply for throttle valve control module
      • Checking wiring connections
    • Throttle Position (TP) sensor -G79- and Sender -2- for accelerator pedal position -G185-, checking
      • Notes
      • Work sequence
      • Checking voltage supply of Throttle Position (TP) sensor
      • Checking wiring connections
    • Kick down function, adapting
  • Vacuum Hose Diagram(S)
    • Vacuum Hose Diagram(S)
      • Notes
      • Installed position: Recirculating valve for turbocharger -N249-
  • Additional signals, checking
    • Engine speed (RPM) signal, checking
    • Consumption signal for board computer, checking
    • Vehicle Speed Sensor (VSS) signal, checking
    • A/C compressor shut-off, checking
    • Brake light switch and brake pedal switch, checking
    • Clutch vacuum vent valve switch -F36-, checking
      • Notes
      • Checking voltage supply
      • Checking activation
    • Pressure switch/power steering -F88-, checking
      • Notes
      • Checking wiring connections
    • Wiring for fuel level signal, checking
    • Crash signal, checking
    • Data exchange, Motronic / ABS (CAN-bus), checking
• 28 Ignition/Glow plug system
  • Ignition system, checking
    • General notes on ignition system
    • Safety precautions
    • Technical data
    • Ignition coils with power output stages, checking
      • Notes
      • Checking Ground (GND) connection
      • Checking voltage supply
      • Checking activation of power output stages
    • Intake Air Temperature (IAT) sensor -G42-, checking
      • Notes
      • Work sequence
      • Checking wire connections
      • Checking sensor
    • Engine speed (RPM) sensor -G28-, checking
    • Engine Coolant Temperature (ECT) sensor -G62-, checking
    • Voltage supply for Engine Control Module (ECM), checking
    • Motronic Engine Control Module (ECM) power supply relay -J271-, checking
      • Notes
      • Work sequence
      • Checking voltage supply
      • Checking activation
    • Knock recognition control limit, checking
      • Notes
      • Measuring value blocks for ignition angle retardation
      • Evaluation display group 20/22/23, - ignition angle retardation
    • Knock sensors, checking
    • Camshaft Position (CMP) sensor 2 -G163-, checking
      • Notes
      • Checking wiring connection between CMP sensor and ECM
    • Misfire recognition, checking
      • Notes
      • Work sequence
      • Evaluation display group 003
      • Misfires of individual cylinders
      • Evaluation of measuring value blocks 15 and 16