Remember that gasoline is a highly flammable liquid! Observe all applicable fire safety precautions when working on power system components. Do not smoke! Do not approach the place of work with an open flame or carrying an unprotected lampshade! Do not service the system in rooms equipped with natural gas-fired heaters equipped with a pilot flame (such as water heaters and clothes dryers). Do not forget that gasoline is classified as a carcinogen, i.e., substances that contribute to the development of cancer! Try to prevent fuel from getting into open areas of the body - use rubber protective gloves, in case of accidental unforeseen contact with fuel, wash your hands thoroughly with warm water and soap. Clean up spilled fuel immediately and do not store fuel-soaked rags near open flames. Remember that the fuel injection system of models equipped with fuel injection is constantly under pressure. Relieve any residual pressure in the system before attempting to disconnect fuel lines. Wear safety goggles when servicing power system components. Keep a class B fire extinguisher handy at all times!
As mentioned above (see Section Power supply systems, release and reduction of toxicity of exhaust gases), the power system includes an electric submersible fuel pump placed inside the tank, a fuel filter, injection injectors, a pressure regulator and fuel lines connecting the listed components. The fuel inside the power system path with the engine running and the ignition on is under pressure. Residual overpressure continues to be held in the system for some time after the ignition is turned off and must be released before disconnecting components / disconnecting the fittings.
The supply system must be depressurized before servicing any of its components to minimize the risk of fuel ignition and personal injury.
1. On engines X12SZ, C14SZ and X14NZ disconnect the fuel pump relay wiring (arrow), located in the footwell behind the right A-pillar cover and run the engine for 5 seconds to relieve fuel pressure.
Fuel pump relay
2. On X14SE, X14XE, X16XE, C16XE engines and DOHC 1.0 and 1.2L engines remove the fuel pump fuse (No. 26 in the fuse box), start the engine and let it run until it stalls on its own, then turn the engine over with the starter 2 ÷ 3 turns.
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