3 Series E46 316i (M43TU) SAL
The engine control unit opens the fuel evaporation control valve. This applies the vacuum generated in the engine
intake manifold to the flush line.
In this way, the activated carbon filter is flushed out with a supply of fresh air through the tank leak diagnosis module
and the dust filter. The components of fuel gathered by the activated carbon filter are fed into the engine's
combustion through the air supply and the flush line.
This process is only possible with the engine running.
Ventilation system - all countries
Please refer to ventilation system USA with the following differences:
1.
The activated carbon filter has a smaller capacity.
2.
The tank leak diagnosis module and dust filter (please refer to drawing 4.4, view A) are eliminated.
3.
The pressure check line is eliminated.
Leak detection for tank ventilation system USA
For description, please refer to "Fuel supply system E52,
1.2 Functional description, leak detection in tank ventilation system USA".
Fuel level measurement in the fuel tank
The fuel level is measured by a lever-type sensor on each side of the fuel tank. The right-hand lever-type sensor is
integrated into the fuel delivery unit. The left-hand lever-type sensor is located in the left-hand sensor unit. The actual
fuel level in the tank is determined by linking the ohm values of the left and right-hand lever-type sensors.
4.3 Fuel system operating data
Pressure regulator: 3.5 bar
Operating pressure of suction jet pump: 1 - 1.3 bar
SBT Functional description of fuel supply system E38 E39 E46 E52 E53
BMW AG - TIS
19.01.2013 20:41
Issue status (12/2007) Valid only until next DVD is issued
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