DTC P0328 Knock Sensor 1 Circuit High (Bank 1 Or Single Sensor): Wiring Diagram

• Engine Electrical System ENGINE TYPE EJ (WITHOUT PUSH BUTTON START) <Ref. to 2.5L TURBO (WITHOUT PUSH BUTTON START), WIRING DIAGRAM, Engine Electrical System.>
• Engine Electrical System ENGINE TYPE EJ (WITH PUSH BUTTON START) <Ref. to 2.5L TURBO (WITH PUSH BUTTON START), WIRING DIAGRAM, Engine Electrical System.>

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

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

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  (B137) No. 2 - (B134) No. 29:	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