FixVault

DTC 34: Knock Sensor

  1. Check Input Signal Circuit

    Turn ignition off. Disconnect ECM harness connector and knock sensor harness connector. Verify harness continuity between knock sensor connector terminal "b" (White wire) and ECM terminal No. 27. See Figure , Fig 1 and Fig 2 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.
  2. Check Component

    Inspect knock sensor. See SYSTEM & COMPONENT TESTING article. Replace knock sensor if necessary and perform FINAL CHECK.
    Fig 1: Locating Knock Sensor Harness Connector
    G93I78632Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: DTC 34, Checking Input Signal Circuit
    G93J78633Courtesy of NISSAN MOTOR CO., U.S.A.