Fuel Pump Connector Disconnection (How To Reduce The Fuel Pressure); Fuel Pump Operation Check - Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement

Fuel pump module
connector
Fuel pump
module
Battery
MPI – MPI –
On-vehicle Service On-vehicle Service
18. Replace the O-ring at the end of the fuel high pressure
hose with a new one. Furthermore, apply engine oil to
the new O-ring before replacement.
19. Fit the fuel high pressure hose over the delivery pipe and
tighten the bolt to specified torque.
Tightening torque: 5 Nm
20. Check for any fuel leaks by following the procedure in
step 7.
21. Disconnect the MUT-II.
FUEL PUMP CONNECTOR DISCONNECTION
(HOW TO REDUCE THE FUEL PRESSURE)
When removing the fuel pipe, hose, etc., since fuel pressure
in the fuel pipe line is high, do the following operation so
as to release the fuel pressure in the line and prevent fuel
from running out.
(1) Remove the rear seat assembly. (Refer to GROUP 52A.)
(2) Remove the protector.
(3) Disconnect the fuel pump module connector.
(4) After starting the engine and letting it run until it stops
naturally, turn the ignition switch to OFF.
(5) Connect the fuel pump module connector.
(6) Install the protector and rear seat assembly.

FUEL PUMP OPERATION CHECK

1. Check the operation of the fuel pump by using the MUT-II
to force-drive the fuel pump.
2. If the fuel pump will not operate, check by using the
following procedure, and if it is normal, check the drive
circuit.
(1) Turn the ignition switch to OFF.
(2) Remove the rear seat assembly.
(Refer to GROUP 52A.)
(3) Remove the protector.
(4) Disconnect the fuel pump module connector. Apply
a battery voltage to the terminal No.4 of the fuel pump
module connector and connect the terminal No.5 to
earth, and check that the fuel pump operation sound
can be heard.
(5) Check the fuel pressure by pinching the fuel hose
with the fingertip.
(6) Connect the fuel pump module connector.
(7) Install the protector and rear seat assembly.
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