Mitsubishi Eclipse Workshop Manual page 140

13-72
FUEL
-
On-vehicle lnspection
of
MPI Components
ition
switch
{ST}
Engine
control
unit connector
IGNITION SWITCH.ST
C
o
OPERATION
o
The ignition switch-ST inputs a high signal to the engine control unit while the engine is cranking. The
engine
control unit provides
fuel
injection control, etc., at engine startup based on this signal.
o
When the ignition switch is set
to
START,
the battery voltage at cranking is applied through the ignition
switch to the engine control unit, which detects that the engine is
cranking.
INSPECTION
Using Multi-use Tester (MUTI
e
o
Function
Item
No.
Data display
Check
condition
Engine Normal indication
Data reading
18
Switch state lgnition switch:
ON Stop
OFF
Cranking
ON
HARNESS INSPECTION
oLOa27
Measure
the input voltage to the
engine control
unit.
.
Engine
control unit
connector:
Disconnected
.
lgnition sryitch:
START
Volage
M
8 or highe
Repair
the
harness.
(@-
lgnition
switch)
6FUl259
Check
for
continuity of the
earth
circuit.
.
Engine
control unit
connector:
Disconneaed
Repair the
harness.
@-
Earth)
C
o
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