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

WARNING: This page is about a different variant/trim than selected.

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Poor driving performance
Knocking occurs

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Clear Memory Mode . and Inspection Mode Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Inspection Mode .
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 .

Fig 1: Knock/Combustion Vibration Sensor 1 Circuit High Bank 1 Or Single Sensor - Wiring Diagram

G11272759

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

(B135) No. 30 - (B134) No. 29:

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) (H4DO)>Knock Sensor .
- No: 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