Resistance Inspection

Disconnect the negative battery cable.
Disconnect the CKP sensor connector.
Measure the resistance between CKP sensor terminals A and B using an ohmmeter.
- If the CKP sensor is okay, but the PID value is out of specification, perform the "Circuit Open/Short Inspection".
- If not as specified, replace the CKP sensor. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION .)
Specification

267-325 ohms

Fig 1: Identifying Crankshaft Position Sensor Connector Terminals
Courtesy of MAZDA MOTORS CORP.