Subaru Legacy 2003 Service Manual page 1878

ENGINE MALFUNCTION INDICATOR LAMP (MI)
B: ACTIVATION OF CHECK ENGINE
MALFUNCTION INDICATOR
LAMP (MI)
1) When the ignition switch is turned to ON (engine
OFF), the CHECK ENGINE malfunction indicator
lamp (MI) in the combination meter illuminates.
NOTE:
If the MI does not illuminate, perform diagnostics of
the CHECK ENGINE light circuit or the combination
meter circuit. <Ref. to EN(H4DOSTC)-40, CHECK
ENGINE MALFUNCTION INDICATOR LAMP (MI)
DOES NOT COME ON., Engine Malfunction Indi-
cator Lamp (MI).>
2) After starting the engine, the MI goes out. If it
does not, either the engine or emission control sys-
tem is malfunctioning.
a) No trouble
ON
MIL
OFF
b) Trouble occurs.
ON
MIL
OFF
3) If the diagnosis system senses a misfire which
could damage the catalyzer, the MI will blink at a
cycle of 1 Hz.
ON
MIL
OFF
Ignition
switch
Engine
ON
start
EN-01001
Ignition
switch
Engine
ON
start
EN-00196
1 sec.
Misfire
start
EN-00197
EN(H4DOSTC)-39
4) When the ignition switch is turned to ON (engine
OFF) or to "START" with the test mode connector
connected, the MI blinks at a cycle of 3 Hz.
ON
MIL
OFF
Ignition
switch
ON
ENGINE (DIAGNOSTICS)
1 sec.
EN-00198