Mitsubishi 3000GT Workshop Manual Supplement page 10

FUEL
-
On-vehicle Inspection of
MPI Components
HARNESS INSPECTION
Measure
the
ignition switch (lG) terminal
input voltage.
o
Engine
control unit connector:
Disconnected
lgnition switch
Voltage (V)
OFF
0-1
ON
SV
Repair the
harness.
(lgnition
switch
-
ez)
or check the
ignition
switch
?FU1928
Measure
the power supply voltage of the
control relay.
o
lgnition switch:OFF
o
Control relay connector:
Disconnected
Voltage (V)
SV
Repair
the
hamess.
(Battery-
@ s)
(Battery-
@ +)
Check for an open-circuit, or a short-circuit
to
earth, between the engine control unit and
the control relay.
o
Engine
control unit connector:
Disconnected
.
Control relay connector:
Disconnected
Repair the
harness.
(@ z
-ee1
(@
t
-tz,
25)
?FU1930
Measure power voltage to the
actuator.
o
Control relay connector:
Connected
o
Engine
control
unit connector:
Connected
Engine
Voltage (V)
Cranking 8V
or higher
Racing SV
Malfunction
of control
relay
or
engine
control unit
CONTROL RELAY INSPECTION
Control relay
equipment side
connector
7FUt931
(1)
Check for continuity between control relay terminals.
Battery
voltage
TerminalNo.
1
2 3
4
Not supplied
o_
---o
Supplied
o-
---o
----@
e_
(2)
Replace the control relay if faulty.