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

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Ref. to OPERATION , Clear Memory Mode, and Inspection Mode Ref. to PROCEDURE , Inspection Mode.
Use the check board when measuring the ECM terminal voltage and resistance.

Wiring diagram:

Engine Electrical System Ref. to WIRING DIAGRAM , Engine Electrical System.

Fig 1: Knock Sensor 1 - Wiring Diagram (High Bank 1 Or Single Sensor)

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK HARNESS BETWEEN ECM AND KNOCK SENSOR CONNECTOR. Turn the ignition switch to OFF. Disconnect the connector from ECM. Measure the resistance between ECM connectors. Connector & terminal (E158) No. 30 - (E158) No. 34:	Is the resistance 600 kΩ or more?	Go to step 2	Repair the poor contact of ECM connector.
2 CHECK KNOCK SENSOR. Disconnect the connector from the knock sensor. Measure the resistance between knock sensor terminals. Terminals No. 1 - No. 2:	Is the resistance 600 kΩ or more?	Replace the knock sensor. Ref. to KNOCK SENSOR	Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit in harness between ECM connector and knock sensor connector Poor contact of knock sensor connector Poor contact of coupling connector