Subaru IMPREZA 2002 Service Manual page 374

ENGINE MALFUNCTION INDICATOR LAMP (MIL)
ENGINE (DIAGNOSTICS)
IGNmON
SWITCH
SBF-4 SBF-I
D: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT GO
OFF.
DIAGNOSIS:
TROUBLE SYMPTOM:
The CHECK ENGINE malfunction indicator lamp (MIL) circuit is shorted.
Although MIL comes on when the engine runs, trouble code is not shown on the Subaru select monitor
or OBD-ll general scan tool display.
WIRING DIAGRAM:
BATERY
Step
1 CHECK HARNESS BETWEEN COMBINA-
TlON METER AND ECM CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ECM.
3)Turn the ianition switch to ON.
m
Check Yes No
Does the MIL come on?
Repair short circuit Replace the ECM.
in harness <Ref. to
between combina- FU(S0HC)-47,
tion meter and Engine Control
ECM connector. Module.>
EN(S0HC)-50