Mitsubishi Stealth 1994 Import Service Manual page 450

MULTIPORT FUEL INJECTION
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CHECK ENGINE/MALFUNCTION INDICATOR
LAMP
Among the on-board diagnostic items, a check engine/
malfunction indicator 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 module judges that it has returned to normal,
the check engine/malfunction indicator 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
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lamp does not come on until the irregularity is detected.
Here, immediately after the ignition switch is turned on, the
check engine/malfunction indicator lamp is lit for 5 seconds to
indicate that the check engine/malfunction indicator lamp
operates normally.
ITEMS INDICATED BY THE CHECK ENGINE/
MALFUNCTION INDICATOR LAMP
Caution
The check engine/malfunction indicator lamp comes on ii
when the line of the ignition timing adjustment terminal is
shorted to ground. Therefore, the lamp also comes on
when the ignition timing adjustment terminal is grounded
to adjust the ignition timing, but this does not show any
abnormality.
If the sensor impressed voltage is abnormal, check the wire
for an open circuit or short-circuit to ground and repair as
necessary. If the wire is normal, replace the engine control
module and check again.
To check the voltage, use a digital voltmeter (or circuit
tester) as a rule.
[However, use an analog voltmeter for checking the power
transistor drive voltage.]