Resistance Inspection

Disconnect the negative battery cable.
Disconnect the KS connector.
Measure the resistance between KS terminals A and B using an ohmmeter.
- If the KS is okay, but the PID value is out of specification, perform the "Circuit Open/Short Inspection".
- If not as specified, replace the KS. (See KNOCK SENSOR (KS) REMOVAL/INSTALLATION ).
  
  Fig 1: Identifying KS Connector Terminals
  Courtesy of MAZDA MOTORS CORP.
  
  Specification
  
  Approx. 4.87 megohms (20°C {68°F})