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General notes on the injection system > < Rules of cleanliness to observe when working on the fuel supply system

Octavia Mk2

Safety measures to apply when working on the fuel injection and ignition system
Safety measures to apply when working on the fuel injection and ignition system
  WARNING
t  The safety measures for the pressure reduction in the high pressure area of the fuel system must be observed → Chapter.
t  The fuel system is under pressure! Wear safety goggles and safety clothing, in order to avoid injuries and skin contact with fuel. Place a clean cleaning cloth around the connection point before detaching wiring. Reduce pressure by carefully removing the wiring.
Observe the following points to prevent injury to persons and/or damage to the injection and ignition system:
t  Do not touch or remove ignition leads and ignition coils with power output stages with the engine running or at start speed.
t  Ignition must be switched off before disconnecting and re-connecting the cables of the fuel injection and the ignition system as well as of the test equipment.
t  If the engine must be operated at start speed without it starting, as for example, when checking the compression pressure, open lid of fuse carrier in the engine compartment and unplug fuse for Motronic current supply relay -J271- → Current flow diagrams, Electrical fault finding and Fitting locations.
For the vehicles Fabia II, Roomster
   
t  The fuel delivery unit is activated when the ignition is switched on and by the door contact switch of the driver door. Before opening the fuel system and for reasons of safety, if the battery is not disconnected, the plug -2- must be disconnected from the fuel pump control unit.
For the vehicles Octavia II, Yeti
  N20-0603
t  The fuel delivery unit is activated when the ignition is switched on and by the door contact switch of the driver door. Before opening the fuel system and for reasons of safety, if the battery is not disconnected, the plug -3- must be disconnected from the fuel pump control unit.
Continued for all vehicles
  Caution
When undertaking all assembly work, particularly in the engine compartment due to its cramped construction, please observe the following:
t  Lay lines of all kinds (e.g. for fuel, hydraulic fluid, the active charcoal container-unit, cooling fluid and refrigerant, brake fluid, vacuum) and electrical lines in such a way that the original line guide is re-established.
t  In order to avoid damage to the cables, ensure that there is adequate free access to all moving or hot components.
If test and measuring devices are required during test drives observe the following:
t  Always secure the test and measuring devices on the rear seat and have a second person operate them there.
t  If the test and measuring devices are operated from the passenger seat, the passenger could be injured by the release of the passenger airbag in the event of an accident.
  S20-0159

General notes on the injection system > < Rules of cleanliness to observe when working on the fuel supply system