Open circuit

If there is no continuity, the circuit is open. Repair or replace the wiring harness.
- CKP sensor terminal A and body ground
- CKP sensor terminal B and PCM terminal 2W^*1 , 2U^*2
- CKP sensor terminal C and PCM terminal 2AQ^*1 , 2T^*2
  
  Fig 1: PCM Connector Terminal Identification
  Courtesy of MAZDA MOTORS CORP.