Wiring Diagram:

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

Fig 1: Wiring Diagram - DTC P0327 Knock Sensor 1 Circuit Low Input (Bank 1 Or Single Sensor)

G03829038

Courtesy of SUBARU OF AMERICA, INC.

DTC P0327 DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1. CHECK HARNESS BETWEEN KNOCK SENSOR AND ECM CONNECTOR. Turn the ignition switch to OFF. Disconnect the connector from ECM. Measure the resistance between ECM harness connector and chassis ground. Connector & terminal (B136) 25 - Chassis ground:	Is the resistance more than 700 kΩ?	Go to step 2.	Repair harness and connector. NOTE: In this case, repair the following: Open circuit in harness between knock sensor and ECM connector Poor contact in knock sensor connector Poor contact in coupling connector
2. CHECK KNOCK SENSOR. Disconnect the connector from knock sensor. Measure the resistance between knock sensor connector terminal and engine ground. Terminals No. 2 - Engine ground:	Is the resistance more than 700 kΩ?	Go to step 3.	Repair harness and connector. NOTE: In this case, repair the following: Poor contact in knock sensor connector
3. CHECK CONDITION OF KNOCK SENSOR INSTALLATION.	Is the knock sensor installation bolt tightened securely?	Replace the knock sensor. < Ref. to KNOCK SENSOR . >	Tighten knock sensor installation bolt securely.