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

1. -

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Poor driving performance
Knocking occurs

Wiring diagram:

Engine Electrical System Ref. to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM

G14614524

Courtesy of SUBARU OF AMERICA, INC.

CAUTION:

Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD

NOTE:

After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE

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
  
  (E51) No. 3 - (E51) No. 33:
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) (H4DOTC)>KNOCK SENSOR

No : Repair the following item.
- Open circuit in harness between ECM connector and knock sensor connector
- Poor contact of J/C