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

1. Disconnect knock sensor harness connector.
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.

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

OK or NG 

OK : GO TO 5. KNOCK SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT .

NG : GO TO 4.