Subaru 2002 IMPREZA Service Manual page 1344

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
AL:DTC P0328 — KNOCK SENSOR CIRCUIT HIGH INPUT —
• 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(TURBO)-45, OP-
ERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(TURBO)-42, Inspection Mode.> .
• WIRING DIAGRAM:
KNOCK
SENSOR
Step
1 CHECK HARNESS BETWEEN KNOCK SEN-
SOR AND ECM CONNECTOR.
Measure the resistance of harness between
ECM connector and chassis ground.
Connector & terminal
(B135) No. 4 — Chassis ground:
E14
E1
B20
B135 ECM
EN(TURBO)-184
E
Check
Is the resistance less than 400
kΩ?
E14
1 2
B20
1 2 3 4
5 6 7
8 9 10
B135
4 5 6 7 8 9
1 2 3
10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28
Yes
Go to step 2. Go to step 3.
EN0975
No