Mitsubishi 1989-1993 GALANT Service Manual page 450

FUEL SYSTEM <DOHC>
OPERATION
The fuel pressure solenoid is an ON-OFF type of
l
solenoid valve and changes pressure fed into
the fuel pressure regulator to intake manifold
pressure and barometric pressure.
Battery power is supplied to the fuel pressure
l
solenoid via the multiport fuel injection relay.
When the engine control module turns on the
power transistor in the unit, current flows in the
coil and barometric pressure is fed to the fuel
pressure regulator.
INSPECTION
Using Scan tool
Item No.
Function
Actuator test 09
HARNESS INSPECTION
Harness side
Engine control module
harness side connecto
Harness side
Description
Measure the power supply VokW
Voltage 04
Check for an open-circuit, or shot-t-
circuit to ground, between the fuel
pressure solenoid and the engine
control module.
tor: Disconnected
. Fuel pressure solenoid connec-
tor: Disconnected
temperature (approximately 50°C (122°F) or
more) are high when the engine is started, fuel
pressure is controlled in order to maintain
pressure at approximately 260 kPa (37 psi)
immediately after starting and then, after a lapse
of approximately 30 seconds to 2 minutes, to
lower it to approximately 190 kPa (27 psi).
Normal condition
Inspection conditions
Ignition switch: ON Operating sound is
heard when driven.
2
Repair the
harness.
Repair the
harness.