Fuel Pressure Control Solenoid

CIRCUIT DIAGRAM





USING MULTI-USE TESTER

Steps 1-2:

HARNESS INSPECTION



OPERATION

The negative pressure in the intake manifold is usually applied to the fuel pressure regulator to control the fuel injection amount to be proportional to the injector drive time by maintaining the fuel pressure to be constant to the pressure in the intake manifold. When the engine is started at the high engine coolant temperature or the high intake air

temperature Is high, ECU flows electricity through the fuel pressure control valve to apply the atmospheric pressure to the fuel pressure regulator.

This increases the fuel pressure to prevent generation of fuel vapor at the high temperatures, thus maintaining the stability of idling soon after restarting.

TROUBLESHOOTING HINTS

If the fuel pressure control valve is not turned on because of wire breakage in the circuit, restartability after hot leakage may become poor.