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Home >> Subaru >> 2006 >> Legacy GT spec.B >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls - Engine (Diagnostics) (H4SO)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0327 Knock Sensor 1 Circuit Low (Bank 1 Or Single Sensor)

DTC P0327 Knock Sensor 1 Circuit Low (Bank 1 Or Single Sensor)

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

DTC DETECTING CONDITION: 

TROUBLE SYMPTOM: 

CAUTION: After repairing or replacing the defective part, perform the Clear Memory Mode < Ref. to OPERATION , Clear Memory Mode. > and Inspection Mode < Ref. to PROCEDURE , Inspection Mode. >.

WIRING DIAGRAM: 

Fig 1: Knock Sensor 1 Circuit Low (Bank 1 Or Single Sensor) - Wiring Diagram
G05017577
DIAGNOSIS PROCEDURE

Step Check Yes No
1 CHECK HARNESS BETWEEN KNOCK SENSOR AND ECM CONNECTOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connectors from ECM.
  3. Measure the resistance between ECM harness connector and chassis ground.

    Connector & terminal 

    (B134) No. 15 - Chassis ground: 

Is the resistance more than 700 kΩ? Go to step 2.  Repair the harness and connector.
NOTE: In this case, repair the following item:
  • Open circuit of harness between knock sensor and ECM connector
  • Poor contact of knock sensor connector
  • Poor contact of coupling connector
2 CHECK HARNESS BETWEEN KNOCK SENSOR AND ECM CONNECTOR. 
Measure the resistance between ECM and knock sensor connector.
Connector & terminal 
(B134) No. 15 - (E14) No. 1: 
(B134) No. 29 - (E14) No. 2: 
Is the resistance less than 1 Ω? Go to step 3.  Repair the harness and connector.
NOTE: In this case, repair the following item:
  • Open circuit of harness between knock sensor and ECM connector
  • Poor contact of knock sensor connector
  • Poor contact of coupling connector
3 CHECK KNOCK SENSOR. 
  1. Disconnect the connector from knock sensor.
  2. Measure the resistance between knock sensor connector terminals.

    Terminals No. 1 - No. 2: 

Is the resistance more than 700 kΩ? Replace the knock sensor. < Ref. to KNOCK SENSOR . > Repair the harness and connector.
NOTE: In this case, repair the following item:
  • Poor contact of knock sensor connector