Subaru IMPREZA 2002 Service Manual page 496

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
AK:DTC PO328
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KNOCK SENSOR CIRCUIT HIGH INPUT
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DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
Poor driving performance
Knocking occurs.
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(S0HC)-43, OP-
ERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(S0HC)-40, OPERATION, Inspec-
tion Mode.>.
WIRING DIAGRAM:
SENSOR
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ECM
EN1 089
EN(S0HC)-172