Open circuit

If there is no continuity, the circuit is open. Repair or replace the harness.
- CKP circuit (CKP sensor connector terminal B and PCM connector terminal 3Y.)
- Power circuit (CKP sensor connector terminal A and main relay terminal D through common connector.)
- GND circuit (CKP sensor connector terminal C and PCM connector terminal 4A through common connector.)
Fig 1: Identifying Main Relay
Courtesy of MAZDA MOTORS CORP.