Subaru IMPREZA GD 2007 Series Manual page 2174

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Diagnostic Trouble Code (DTC) Detecting Criteria
AW:DTC P0327 KNOCK SENSOR 1 CIRCUIT LOW (BANK 1 OR SINGLE SENSOR)
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of knock sensor.
Judge as NG if out of specification.
2. COMPONENT DESCRIPTION
(1)
(2)
(3)
(1) Case
(2) Weight
(3) Piezoelectric element
3. ENABLE CONDITION
Secondary Parameters
None
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
(4) (5)
(4) Nut
(5) Resistance
Enable Conditions
GD(STI)-107
GENERAL DESCRIPTION
(A)
EN-01707
(A) To knock sensor harness