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

• 01 On Board Diagnostic (OBD)
  • On Board Diagnostic (OBD) of Motronic
    • Technical data
    • Malfunction Indicator Lamp (MIL), significance
      • Notes
      • Scan Tool (ST) and test equipment safety precautions
      • Scan Tool (ST) and test equipment safety precautions, continued
    • VAS5051 vehicle diagnostic, testing and information system or VAG1551 scan tool, connecting and selecting functions
  • Diagnostic Trouble Code (DTC) memory, checking and erasing
    • Diagnostic Trouble Code (DTC) memory, checking and erasing
    • Diagnostic Trouble Code (DTC) table
  • Output Diagnostic Test Mode (DTM)
    • Output Diagnostic Test Mode (DTM)
  • Basic Setting
    • Basic Setting
  • Code Control Module
    • Code Control Module
    • Coding table
  • Read Measuring Value Block
    • Read Measuring Value Block
  • Readiness code
    • Readiness code
    • Readiness code, displaying
    • 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 3: Diagnostic of tank seal
      • Work step 4: Diagnostic of tank ventilation valve
      • Work step 5: Diagnostic of fuel supply system
      • Work step 6: Checking heated oxygen sensor
      • Work step 7: Diagnostic of operational readiness of oxygen sensors behind catalytic converter
      • Work step 8: Diagnostic of oxygen sensor aging before catalytic converter
      • Work step 9: Diagnostic oxygen sensor control system
      • Work step 10: Diagnostic of oxygen sensor aging behind catalytic converter
      • Work step 11: Diagnostic of catalytic converter
      • Work step 12: Readiness code, reading
• 24 Multiport Fuel Injection (MFI)
  • Motronic multiport fuel injection and ignition system, repairing
    • Scan Tool (ST) and test equipment safety precautions
    • Rules of cleanliness
    • Technical data
    • Component locations, overview
      • Notes
      • Oxygen sensors and protective cover
      • Black and brown connectors
      • Component locations of Throttle Position (TP) sensor -G79- and sender 2 for accelerator pedal position -G185-
      • Component location brake light switch -F- and brake pedal switch -F47-
      • Component location, exhaust warning lamp -K83-
      • Component location, malfunction light for power accelerator activation -K132-
      • Component location, clutch vacuum vent valve switch -F36-
      • Component location, 3-pin harness connectors
      • Component location, pressure switch/power steering -F88-
    • Air filter, disassembling and assembling
    • Wire and component test using VAG1598/31 test box
    • Procedure after voltage supply is interrupted
    • Engine Control Module (ECM) (without metal anti-theft housing), replacing
    • 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 distributor with fuel injectors, disassembling and assembling
      • Notes
      • Fuel injectors, removing and installing
      • Installation is in reverse order of removal, noting the following:
      • Tightening torque
    • Injection quantity, proper seal and spray pattern of fuel injectors, checking
    • Fuel Pump (FP) relay -J17-, checking activation
      • Notes
      • Check activation of Fuel Pump (FP) relay
      • Check voltage supply for Fuel Pump (FP) and components
    • Mass Air Flow (MAF) sensor -G70-, checking
      • Notes
      • Check voltage supply for Mass Air Flow (MAF) sensor
      • Check wire connections for Mass Air Flow (MF) sensor
    • Intake air system, checking for leaks (un-metered air)
  • Oxygen sensor control, checking
    • Function of oxygen sensor control before catalytic converter
    • Oxygen sensor and oxygen sensor control before catalytic converter, checking
      • Notes
      • Checking oxygen sensor adaptation values and control
      • Continuation
      • Checking primary voltage
      • Checking oxygen sensor wiring
    • Oxygen sensor aging, oxygen sensor before catalytic converter, checking
      • Notes
      • Continuation
    • Oxygen sensor and oxygen sensor control behind catalytic converter, checking
      • Notes
      • Checking primary voltage
      • Checking oxygen sensor wiring
    • Oxygen sensor heating for oxygen sensors before and after catalytic converter, checking
      • Notes
      • Checking voltage supply of oxygen sensor heating
    • Oxygen sensor, removing and installing
  • Secondary Air Injection (AIR) valve, checking
    • Secondary Air Injection (AIR) valve, checking
    • Secondary Air Injection (AIR) solenoid valve -N112-, checking
    • 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 for Secondary Air Injection (AIR) pump motor
  • Tank ventilation, checking
    • Evaporative Emission (EVAP) canister purge regulator valve -N80-, checking
      • Notes
      • Checking for proper seal
      • Checking internal resistance
      • Checking voltage supply
      • Checking activation
  • Electronic accelerator (E-Gas) power control, checking
    • E-Gas system, function
    • Electronic Power Control (EPC) warning lamp (malfunction indicator lamp for electronic accelerator-E-Gas) in instrument cluster, significance
    • Malfunction light for power accelerator activation -K132-, checking
    • Throttle valve control module -J338-, checking
    • Throttle valve control module, adaptation
      • Notes
      • Possible reasons for the control module to abort the adaptation procedure:
    • Throttle valve, checking for soiling
      • Notes
      • Checking oxygen sensor adaptation values and control
      • Work sequence
    • Throttle valve control module, cleaning
    • Angle sensor for throttle drive, checking
      • Notes
      • Check voltage supply throttle valve control module
      • Checking wire connections
    • Accelerator pedal position sensors, checking
      • Notes
      • Checking voltage supply of the sensors for accelerator pedal position
      • Checking wire connections
    • Kick down function, learning
  • Vacuum Hose Diagram(S)
    • Vacuum Hose Diagram(S)
  • Auxiliary signals, checking
    • Engine speed signal, checking
    • Consumption signal for board computer, checking
    • Vehicle Speed Signal (VSS), checking
    • A/C compressor switch-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 wire connections
    • Wiring for fuel level signal, checking
    • Data exchange, Motronic/ABS (CAN-bus), checking
• 28 Ignition/Glow plug system
  • Ignition system, checking
    • Ignition system, general information
    • Scan Tool (ST) and test equipment safety precautions
      • Notes
      • Scan Tool (ST) and test equipment safety precautions, continued
    • Ignition coils with power output stage, checking
      • Notes
      • Check Ground (GND) connection
      • Checking voltage supply
      • Checking activation of the power output stage
    • Intake Air Temperature (IAT) sensor -G42-, checking
      • Notes
      • Checking wire connections
      • Checking sensor
    • Engine speed (RPM) sensor -G28-, checking
    • Engine Coolant Temperature (ECT) sensor -G62-, checking
    • Control module voltage supply, checking
    • Knock sensor and knock sensor regulation, checking
    • Knock sensors, checking
      • Notes
      • Checking knock sensor wires
      • Checking wires from knock sensor to engine control module
    • Camshaft Position (CMP) sensor 2 -G163-, checking
      • Notes
      • Checking activation
      • Checking voltage supply
      • Checking signal wire
      • Checking Ground wire
      • Checking wire connections between camshaft position sensor and engine control module
    • Misfire recognition, checking