This service manual has been prepared primarily for the purpose of assisting service personnel in providing effective service and maintenance of the Audi. This manual includes procedures for maintenance, adjustment, removal and installation, disassembly and assembly of components, and troubleshooting.

Technical information should always be available to the foremen and mechanics, because their careful and constant adherence to the instructions is essential to ensure vehicle road-worthiness and safety. In addition, the normal basic safety precautions for working on motor vehicles must, as a matter of course, be observed.

Table contents Audi A3 Service Manual

Mixture preparation - injection

  • Servicing injection system
  • General notes on self-diagnosis
  • Safety precautions
  • Rules for cleanliness
  • Procedure to be followed prior to opening high-pressure injection system - take note of the following
  • Technical data
  • Overview - fitting locations
  • Exploded view - intake manifold
  • Exploded view - fuel rail
  • Exploded view - air cleaner / engine cover panel
  • Removing and installing engine cover panel with air filter element
  • Removing and installing intake manifold with fuel rail
  • Removing and installing injectors
  • Checking initial fuel pressure (up to high-pressure pump)
  • Checking fuel pressure and residual pressure (up to high-pressure pump)
  • Exploded view - high-pressure fuel pump
  • Removing and installing high-pressure fuel pump
  • Wiring and component check with test box V.A.G 1598/42
  • Renewing Motronic control unit J220
  • Removing and installing Lambda probe G39 and Lambda probe heater Z19 before catalytic converter
  • Removing and installing Lambda probe after catalytic converter G130 and Lambda probe 1 heater, after catalytic converter

Ignition system

  • Checking ignition system
  • General notes on ignition system
  • Safety precautions
  • Technical data for ignition system
  • Ignition system - exploded view of components
  • Removing and installing ignition coils with output stages

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