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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 37 (Engine Controls (Diagnostics) (H4DOTC)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0327 Knock Sensor 1 Circuit Low (Bank 1 Or Single Sensor) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 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 

    (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. 
  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? Replace the knock sensor. < Refer to KNOCK SENSOR . > Repair the harness and connector.
NOTE: In this case, repair the following item:
  • Open circuit in harness between ECM and knock sensor connector
  • Poor contact of knock sensor connector
  • Poor contact of coupling connector
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