Mitsubishi 3000gt 1997 - FUEL SYSTEM HARNESS AND RELAY INSPECTION; Harness Inspection; Control Relay Inspection

13-4
FUEL
-
On-vehicle
Inspection of
MPI Components
Repair the
harness.
(lgnition
switch
-
oz
)
or check
the
ignition
switch
Measure
the ignition switch
(lG)
terminal
input voltage.
o
Engine control unit connector:
Disconnected
lgnition switch
Voltage
(V)
OFF 0-1
ON SV
?FUt928
Measure the
power
supply
voltage
of
the
control
relay.
o
lgnition
switch:
OFF
o
Control
relay
connector:
Disconnected
Voltage
(V)
SV
Repair the
harness.
(Battery
-
@
s)
(Battery
-
@
a)
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
o
Control
relay
connector:
Disconnected
Repair the
harness.
(@
z
-oa;
(@
r
-rz,
25)
Malfunction
of control
relay or
engine
control unit
?FU1930
Measure
power
voltage to
the actuator.
o
Control relay connector:
Connected
.
Engine
control unit
connector:
Connected
Engine
Voltage
(V)
Cranking
8V
or higher
Racing SV
CONTROL
RELAY
INSPECTION
?FU1931
(1)
Check
for continuity
between control
relay terminals.
Battery
voltage
Terminal No.
1 2 3
4
Not
supplied
C
---c
Supplied
C-
--{
----@
o-
(2)
Replace the control
relay if faulty.