– Before to remove or establish any of system elements, to consider codes of malfunctions, then to disconnect minus a wire «–» the storage battery.
– Before to disconnect minus a wire of the storage battery, to switch off ignition. The detachment or accession of a wire of the battery at the working engine or the included ignition can cause control unit damage by the engine.
– The warmed-up oxygen sensor is connected to EBU the ekranirovany wires which screens are connected to in "mass" of a body for protection against hindrances against system of ignition and a radio noise. At damage of screens to replace wires.
– At check of loading of the generator not to disconnect a wire from a plusovy conclusion «+» the storage battery to prevent EBU damage by the increased tension.
– At a charging of the storage battery from an external source to disconnect from it minus a wire not to damage EBU.