FUEL FILTER [SKYACTIV-D 1.8]

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Fuel Filter

Purpose, function

•  The fuel filter removes foreign matter and dirt in the fuel.

Construction

•  The fuel filter is installed between the fuel tank and the supply pump and it is located next to fuel tank.

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•  The fuel filter consists of the fuel warmer, cartridge, and sedimentor switch.

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Fuel Warmer

Purpose, function

•  When the temperature decreases, the wax component for diesel fuel becomes greasy and the greasy wax component clogs the fuel filter. The wax component in the summer fuel becomes greasy at a higher temperature than in the winter fuel. After the engine is started, the fuel warmer melts the greasy wax component to prevent clogging in the fuel filter.

Construction

•  The fuel warmer is located in the fuel filter.

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•  Consists of the thermistor switch and fuel warmer.

Operation

•  When the temperature in the fuel passage is approx. 2―8 °C {36―46 °F} or less, the thermistor switch turns on and power is supplied to the fuel warmer heater. The greasy wax component is heated and melted by the fuel warmer heater. When the temperature inside the fuel passage increases approx. 2 °C {4 °F} or more, the thermistor switch is turned off and the power to the fuel warmer heater is cut.

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Sedimentor Switch

Purpose, function

•  Detects the water level in the sedimentor. The float rises according to the level of accumulated water. If the water level exceeds the specification, the circuit for the sedimentor switch is completed.

Construction

•  The sedimentor switch is installed to the fuel filter.

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Operation

•  If the water level in the sedimentor exceeds a certain level, the sedimentor switch turns on, which is input to the PCM.

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