Subaru IMPREZA 2002 Service Manual page 419

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE IDIAGNOSTICS)
Step
CHECK CURRENT DATA.
1)Turn the ignition switch to
OFF.
2)Repair the battery short circuit in harness
between ECM and rear oxygen sensor connec-
tor.
3)Turn the ignition switch to ON.
4)Read the data of rear oxygen sensor heater
current using Subaru Select Monitor or the
OBD-II general scan tool.
NOTE:
*Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE. <Ref.
to EN(S0HC)-32, Subaru Select Monitor.>
*OBD-ll general scan tool
For detailed operation procedure, refer to the
OBD-ll General Scan Tool Instruction Manual.
Check poor contact in ECM connector.
I
CHECK POOR CONTACT.
Check
Is the value more than 7 A?
Is there poor contact in ECM
connector?
Yes
3eplace the ECM.
:Ref. to
Engine Control
vlodu le.
>
'U( S0HC)-47,
3epair poor con-
act in ECM con-
lector.
!ND
EN(S0HC)-95