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

1. Disconnect knock sensor harness connector.
   Fig 1: Disconnect Knock Sensor Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check harness continuity between ECM terminal 15 and knock sensor terminal 1.

   Refer to WIRING DIAGRAM.

   1. Continuity should exist. 
3. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO 4 .
2. NG: GO TO 3.