July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Knock Sensor

Use an ohmmeter which can measure more than 10 MΩ.

Disconnect knock sensor harness connector.
Check resistance between terminal 1 and ground.
Resistance: 530 - 590 kΩ [at 20°C (68°F)]

CAUTION: Discard any knock sensors that have been dropped or physically damaged. Use only new ones.

Fig 1: Checking Resistance Between Terminal 1 And Ground

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