DTC 34: Knock Sensor

Check Input Signal Circuit I

Turn ignition off. Disconnect ECM harness connector and knock sensor sub-harness connector. Verify harness continuity between knock sensor sub-harness connector terminal "B" (White wire) and ECM terminal No. 23. See Figure , Figure , Figure and Fig 1 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.

Check Input Signal Circuit II

Disconnect knock sensor harness connector from sub-harness. Verify harness continuity between sub-harness terminal "C" and knock sensor harness connector terminal "F" (White wire). See Fig 3 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.

Check Component

Inspect knock sensor. See SYSTEM/COMPONENT TESTS article. Replace knock sensor if necessary and perform FINAL CHECK .

Fig 1: Locating Knock Sensor Sub-Harness Connector (J30)

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: DTC 34, Checking Input Signal Circuit I (J30)

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: DTC 34, Checking Input Signal Circuit II (J30)

Courtesy of NISSAN MOTOR CO., U.S.A.