Subaru IMPREZA 2004 Service Manual page 77

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
AI: DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH INPUT (BANK 1 OR SINGLE
SENSOR)
• 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(H4SO)(diag)-47,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO)(diag)-40, OPERATION,
Inspection Mode.>.
• WIRING DIAGRAM:
KNOCK
SENSOR
E14
E2
B21
B135
ECM
EN(H4SO)(diag)-154
5
13
1 2 3
8 9
10 11 12 13 14 15
20 21 22 23
E
E14
1 2
B21
1 2 3 4
6 7 8
9 10 11 12
14 15 16
17 18 19 20
B135
4 5 6 7
16 17 18 19
24 25 26 27 28
EN-01429