DTC P0328: Knock/Combustion Vibration Sensor 1 Circuit High Bank 1 Or Single Sensor: Notes

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Poor driving performance
Knocking occurs

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Clear Memory Mode>OPERATION , and inspection mode Ref. to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>Inspection Mode>PROCEDURE .

Use the check board when measuring the ECM terminal voltage and resistance.

Wiring diagram:

Engine Electrical System Ref. to WIRING SYSTEM>Engine Electrical System>WIRING DIAGRAM .

G10267559

Courtesy of SUBARU OF AMERICA, INC.

CHECK HARNESS BETWEEN ECM AND KNOCK SENSOR CONNECTOR .
1. Turn the ignition switch to OFF.
2. Disconnect the connector from ECM.
3. Measure the resistance between ECM connectors.
  Connector & terminal
  
  (E158) No. 14 - (E159) No. 27:
Is the resistance 600 kΩ or more?

Yes: Go to 2.

No: Repair the poor contact of ECM connector.
CHECK KNOCK SENSOR .
1. Disconnect the connector from the knock sensor.
2. Measure the resistance between knock sensor terminals.
  Terminals
  
  No. 1 - No. 2:
Is the resistance 600 kΩ or more?

Yes: Replace the knock sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>Knock Sensor .

No: Repair the open circuit in harness between ECM connector and knock sensor connector.