Subaru 2009 IMPREZA Service Manual page 1402

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AX:DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH (BANK 1 OR SINGLE SENSOR)
DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-90, DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH
(BANK 1 OR SINGLE SENSOR), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
• Poor driving performance
• Knocking occurs.
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-54,
OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-43, PROCE-
DURE, Inspection Mode.>.
WIRING DIAGRAM:
KNOCK SENSOR
E14
E2
B21
B134 ECM
EN(H4DOTC)(diag)-181
E
ENGINE (DIAGNOSTICS)
E14
1 2
B134
1 2 3 4 5 6 7
8 9 10 11 12 13 14 15 16 17
18 19 20 21 22 23 24 25 26 27
28 29 30 31 32 33 34
B21
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
34 35 36 37 38 39 40 41
42 43 44 45 46 47
48 49 50 51 52 53 54
EN-05675