Resistance Inspection

Disconnect the negative battery cable.
Disconnect the KS connector.
Measure the resistance between the KS terminals A and B using an ohmmeter.
- If not as specified, replace the KS. (See KNOCK SENSOR (KS) INSPECTION .)
  Specification
  
  Approx. 4.63-5.11 megohms [ECT: 25°C {77°F}]
  
  Fig 1: Identifying KS Connector End View
  Courtesy of MAZDA MOTORS CORP.