System Description - Low Fuel Pressure Control
- The low fuel pressure pump is controlled by the fuel pump control module (FPCM) and pumps fuel according to a driving condition. The pumped fuel passes through the fuel filter and is sent to the high pressure fuel pump. FPCM controls the low pressure fuel pump, according to a signal from ECM as shown in the table below.
Conditions Amount of fuel flow Supplied voltage After a laps of 1 second after ignition ON OFF 0 V - For 1 second after turning ignition switch ON
- Engine is running under low load and low speed conditions
Low Approximately 8.5 V - Engine cranking
- Engine coolant temperature is below 10°C (50°F)
- Engine is running under high load and high speed conditions
High Battery voltage
(11 - 14 V)Except the above Mid Approximately 10 V - Low fuel pressure is adjusted by the fuel pressure regulator.