Subaru Legacy 2002 Service Manual page 889

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Engine (Diagnostics)
E: DTC 22 KNOCK SENSOR
¼ DIAGNOSIS:
¼ The knock sensor signal is abnormal.
¼ The harness connector between ECM and knock sensor is in short or open.
¼ TROUBLE SYMPTOM:
¼ Poor driving performance
CAUTION:
After repair or replacement of faulty parts, conduct CLEAR MEMORY and INSPECTION MODES.
<Ref. to EN(w/oOBD)-30, OPERATION, Clear Memory Mode.> and <Ref. to EN(w/oOBD)-28,
OPERATION, Inspection Mode.>
¼ WIRING DIAGRAM:
S038521G59
EN(w/oOBD)-78
B2M4196