Subaru Legacy 2003 Service Manual page 2039

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
6 CHECK POOR CONTACT.
Check poor contact in intake air valve control
solenoid valve and ECM connectors.
Is there poor contact in intake air valve control
solenoid valve and ECM connectors?
Step
EN(H4DOSTC)-200
Value
There is poor contact.
Yes
Repair the poor Contact SUBARU
contact in intake distributor service.
air valve control
NOTE:
solenoid valve and
Inspection by DTM
ECM connectors.
is required,
cause
cause is deteriora-
tion of
parts.
No
be-
probable
multiple