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: 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 .

Wiring diagram:

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

G13202485

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 and terminal.
  
  (E158) No. 22 - (E158) No. 42:
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