DTC 34: Knock Sensor

Check Input Signal Circuit I

Turn ignition off. Disconnect ECM harness connector and EFI sub-harness No. 2 connector. Verify harness continuity between EFI sub-harness No. 2 connector terminal "c" (White wire) and ECM terminal No. 23, and connector terminal "f" (White wire) and ECM terminal No. 24. If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary. See Figure , Figure , Figure and Figure .

Check Input Signal Circuit II

Disconnect knock sensor (left and right) harness connectors. Verify harness continuity between EFI sub-harness terminal "i" and left knock sensor harness connector terminal "g" (White wire) and between EFI sub-harness terminal "l" and right knock sensor harness connector terminal "h" (White wire). If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary. See Fig 2 and Fig 3 .

Check Component

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

Fig 1: DTC 34, Checking Input Signal Circuit I (Q45)

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

Fig 2: Locating Knock Sensors (Q45)

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

Fig 3: DTC 34, Checking Input Signal Circuit II (Q45)

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