HIGH PRESSURE FUEL PUMP [SKYACTIV-G 2.5T]

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Purpose, Function

•  The high pressure fuel pump is used for the direct fuel injection system.
Fuel sent from the fuel pump located on the fuel tank is boosted up to the required pressure calculated by the PCM according to the engine operation conditions and pumped to the fuel distributor.

Construction

•  The high pressure fuel pump is located on the exhaust camshaft at the rear of the engine.
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•  The high pressure fuel pump consists of a spill valve control solenoid valve, spill valve, piston, discharge valve, relief valve, and low fuel pressure sensor/fuel temperature sensor.
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Operation

•  Fuel is suctioned and pumped by the up and down movement of the piston caused by the rotation of the cam installed to the rear end of the exhaust camshaft.
•  Based on the control signal from the PCM, the spill valve control solenoid valve opens and closes in the high pressure fuel pump.
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•  If the spill valve control solenoid valve malfunctions and the fuel pressure exceeds the specified value, the relief valve opens to assure safety.
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•  For the high pressure fuel pump control details, refer to the [CONTROL SYSTEM]. (See HIGH PRESSURE FUEL PUMP CONTROL [SKYACTIV-G 2.5T].)

Fail-safe

DTC

Fail-safe
P0087:00
•  Limits the intake air amount.
•  Stops the high pressure fuel pump control.
P0088:00
•  Limits the intake air amount.
•  Stops the high pressure fuel pump control.
P0089:00
•  Limits the intake air amount.
•  Stops the high pressure fuel pump control.
•  Restricts the upper limit of the engine rpm to 2,500 rpm.
P0091:00
•  Limits the intake air amount.
•  Stops the high pressure fuel pump control.
P0092:00
•  Limits the intake air amount.
•  Stops the high pressure fuel pump control.