3. Check Knock Sensor Input Signal Circuit For Open And Short-II

1. Disconnect knock sensor harness connector.
   Fig 1: Identifying Knock Sensor

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check harness continuity between the following;

   ECM terminal 125 and knock sensor (bank 1) terminal 1,

   ECM terminal 126 and knock sensor (bank 2) terminal 1.

   Refer to WIRING DIAGRAM .

   Continuity should exist. 

3. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO 5. KNOCK SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT .
2. NG: GO TO 4.