1.8L - MULTIPORT Fuel Injection (MFI), Engine Code(S): AMB

• Multiport Fuel Injection (MFI)
  • Motronic injection system, servicing
    • Safety precautions
    • Rules for cleanliness
    • Technical data
    • Component locations, overview
      • Notes
      • Location
      • Location of Fuel Pump (FP) Relay -J17-
      • Location of Brake Light Switch -F- and Brake Vacuum Vent Valve Switch -F47-, Clutch Vacuum Vent Valve Switch -F36-
      • Location of Throttle Position (TP) Sensor 1 -G79- and Throttle Position (TP) Sensor 2 -G185-
      • Location of Engine Control Module (ECM) in electronics box (plenum chamber)
      • Component locations in electronics box (plenum chamber)
      • Location of Secondary Air Injection (AIR) Solenoid Valve -N112- and Recirculating valve for turbocharger -N249-
      • Location of Charge Air Pressure Sensor -G31-
    • Electrical testing using VAG1598/31 test box
      • Notes
      • Procedure
    • Procedure after interruption of voltage supply
    • Engine Control Module (ECM) (without metal anti-theft housing), replacing
      • Notes
      • Removing Engine Control Module
      • Installing Engine Control Module
      • The following operations must be carried out after installing the Engine Control Module:
    • Engine Control Module (ECM) (with metal anti-theft housing), replacing
      • Notes
      • Removing
      • The following equipment is required:
      • Procedure:
      • Installing Engine Control Module (ECM)
      • After connecting a new Engine Control Module (ECM), the following work steps must be performed:
    • Idle speed (RPM), checking
      • Special tools and workshop equipment required
      • Test requirements:
      • Test sequence
        • Notes
        • If the idle is too high or too low and there are no DTCs recorded in the DTC memory, perform the following tests:
        • Significance of 5 digit indication of display group 056
    • System pressure, fuel pressure regulator and residual pressure, checking
      • Notes
      • Special tools and workshop equipment required
      • Test requirements:
      • Checking system pressure
        • Notes
        • Vehicles up to 06.03:
        • Vehicles as of 07.03:
        • All:
      • Checking fuel pressure regulator - vehicles with front-wheel drive:
        • Notes
        • Vehicles up to 06.03:
        • Vehicles as of 07.03:
      • Checking fuel pressure regulator - vehicles with all wheel drive:
        • Notes
        • Vehicles up to 06.03:
        • Vehicles as of 07.03:
    • Fuel injectors, checking
      • Special tools and workshop equipment required
      • Procedure
      • Checking internal resistance
      • Checking power supply
        • Test requirements:
      • Checking activation
        • Test requirements:
    • Fuel rail with injectors, disassembling and assembling
      • Notes
      • Loosening and tightening union nut for fuel supply line in vehicles as of 07.03
    • Fuel injectors, removing and installing
      • Removing
      • Tightening Torque
    • Injection quantity, proper seal and spray pattern of fuel injectors, checking
      • Special tools and workshop equipment required
      • Test requirements:
      • Test sequence
      • Leak test
      • Checking injection quantity
    • Fuel Pump (FP) Relay -J17- and relay activation, checking
      • Notes
      • Test requirements:
      • Functional check of Fuel Pump (FP) Relay -J17-
      • Checking voltage supply of Fuel Pump (FP) Relay -J17-
      • Checking activation of Fuel Pump (FP) Relay -J17-
      • Checking voltage supply of fuel pump and components
    • Mass Air Flow (MAF) sensor -G70-, checking
      • Notes
      • Test requirements:
      • Checking function
      • Evaluation of display group 002
      • Voltage supply to Mass Air Flow (MAF) sensor -G70-, testing
        • Test requirements:
      • Wiring to Mass Air Flow (MAF) sensor -G70-, checking
    • Intake air system for leaks (unmetered air), checking
      • Notes
      • Test sequence
    • Fuel system, bleeding
      • Notes
      • Fuel system without return line
  • Oxygen sensor system
    • Oxygen Sensor (O2S) and Oxygen Sensor control before catalytic converter, checking
      • Special tools and workshop equipment required
      • Test requirements:
      • Test sequence
      • Checking Oxygen Sensor (O2S) adaptation values and Oxygen Sensor (O2S) control
        • Notes
        • (Cont.)
      • Evaluating display group 032 (below specified range)
      • Evaluating display group 032 (above specified range)
      • Evaluating display group 033
      • Checking basic voltage
      • Checking Oxygen Sensor (O2S) wiring
    • Oxygen Sensor (O2S) before Three Way Catalytic Converter (TWC), checking
      • Special tools and workshop equipment required
      • Test requirements:
      • Test sequence
      • Test conditions:
        • Notes
        • (Cont.)
    • Oxygen Sensor (O2S) heating -Z19- for oxygen sensor before Three Way Catalytic Converter (TWC), checking
      • Special tools and workshop equipment required
      • Test requirements:
      • Test sequence
      • Checking voltage supply for Oxygen Sensor heating
    • Oxygen Sensor (O2S) and Oxygen Sensor control before Three Way Catalytic Converter (TWC), checking
      • Notes
      • Special tools and workshop equipment required
      • Test requirements:
      • Test sequence
    • Oxygen Sensor control after Three Way Catalytic Converter (TWC), checking
      • Notes
      • Evaluating display group 037
        • Notes
        • (cont.)
      • Checking basic voltage
    • Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC), checking
      • Special tools and workshop equipment required
      • Test requirements:
      • Test sequence
      • Test conditions:
        • Notes
        • (Cont.)
    • Oxygen Sensor (O2S) heating -Z29- for Oxygen Sensor after Three Way Catalytic Converter (TWC), checking
      • Special tools and workshop equipment required
      • Test requirements:
      • Test sequence
    • Oxygen Sensor (O2S), removing and installing
      • Special tools, workshop equipment and other Items required
      • Procedure
  • Fuel tank ventilation system, checking
    • Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-, checking
      • Special tools and workshop equipment required
      • Testing for leaks
      • Checking internal resistance
      • Checking power supply
        • Test requirements:
      • Checking activation
  • Electronic power control (EPC) system, checking
    • EPC system function
    • Electronic Power Control (EPC) Warning Lamp -K132- in instrument cluster
    • Electronic Power Control (EPC) Warning Lamp -K132-, checking
      • Functional check of warning lamp
    • Throttle Valve Control Module -J338-, checking
    • Throttle Valve Control Module -J338-, adapting
      • Notes
      • Special tools and workshop equipment required
      • Preconditions:
      • Procedure
    • Throttle valve, checking for soiling
      • Requirements
      • Checking oxygen sensor adaptation values and control
        • Test sequence
        • Work procedure
        • Test requirement:
    • Throttle valve control module, cleaning
    • Angle sensors for throttle drive -G187- and -G188-, checking
      • Notes
      • Test sequence
      • Checking voltage supply to Throttle Valve Control Module -J338-
      • Checking wire connections
    • Throttle Position (TP) sensor 1 -G79- and Throttle Position sensor 2 -G185-, checking
      • Notes
      • Test sequence
      • Voltage supply for Throttle Position sensors -G79- and -G185-, checking
      • Check wiring
    • Kick-down function, adapting
      • Notes
      • Special tools and workshop equipment required
      • Preconditions:
      • Procedure
    • Brake Light Switch -F- and Brake Pedal Switch -F47-
      • Notes
      • Test sequence
      • Check switch
      • Check power supply
      • Check activation
    • Clutch Vacuum Vent Valve Switch -F36-, checking
      • Notes
      • Test sequence
      • Checking switch
      • Checking voltage supply
      • Checking activation
    • Cruise Control System (CCS) switch -E45-, testing
      • Notes
      • Test sequence
      • Significance of 8-digit display in display field 4
  • Additional signals, checking
    • Special tools and workshop equipment required
    • Engine speed (RPM) signal, checking
      • Vehicles with automatic transmission:
    • Crash signal, checking
    • Data exchange, Motronic / ABS (CAN-bus), checking
      • Notes
      • Checking the bus system
      • The following systematic procedure is useful for troubleshooting if three or more control modules are communicating via a "two-line bus system":
        • Notes
        • Example 1:
        • Example 2:
        • Example 3:
      • If you cannot determine a cause for the DTC "Powertrain databus malfunction," check whether the DTC is caused by one of the control modules
        • Test requirements:
  • Vacuum Hose Diagram(S)
    • Vacuum Hose Diagram(S)