Mitsubishi Eclipse Workshop Manual page 73

FUEL
-
Troubleshooting
13-9
I
o
When checking short-circuit to ground of
a
wire. open
one
end of the wrre and check continuity between the other
end
and ground. lf there
is continuity, the
wire
is short-circuited
to
ground and requires
repair.
For
checking continuity, use
an analog ohmmeter (or circuit
tester) as
a
rule.
lf the sensor impressed voltage
is
abnormal, check the wire
for
an open circuit
or
short-circuit
to ground and repair
as
necessary. lf the wire is normal, replace the engine control
unit and check
again.
To check
the voltage, use
a
digital voltmeter (or circuit
tester) as
a
rule.
lHowever, use an analog voltmeter for checking the power
transistor drive voltage.l
ENGTNE
WARNTNG
rÄMp
(CHECK
ENGTNE
|AMPI
Among the self-diagnosis items,
a
engine warning lamp comes
on
to
notify the driver of the emission control
items
when
an
irregurality is detected.
However.
when an irregular signal returns to
normal and the
engine
control unit judges that it
has returned
to
normal. the
engine warning lamp goes out.
Moreover,
when
the ignition switch is turned off. the
lamp
goes out.
Even
if the ignition
switch is turned on again, the
lamp does not come on until the irregularity is detected.
Here, immediately after
the ignition switch is turned on,
the
engine
warning lamp is lit for 5
seconds
to
indicate that the
engine warning lamp operates normally.
ITEMS INDICATED BY THE ENGINE WARNING
LAiIP
I
I
o
I
o
a
Engine
control unit
Oxygen sensor
Air flow
sensor
Intake air temperature sensor
Throttle position sensor
Engine coolant temperature sensor
Crank
angle sensor
Top dead centre sensor
(No.
'l
and No.
4
cylinder top dead
centre)
Barometric pressure sensor
Detonation sensor
Injector
lgnition coil,
Power
transistor unit
Fuel
pump
PWUE9010
@
Mitsubishi Motors Gorporation
Apr. 1991