Open circuit

If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- Fuel injector No. 1 terminal A and PCM terminal 2BB
- Fuel injector No. 2 terminal A and PCM terminal 2BC
- Fuel injector No. 3 terminal A and PCM terminal 2BD
- Fuel injector No. 4 terminal A and PCM terminal 2AZ
- Fuel injector No. 1 terminal B and main relay terminal C
- Fuel injector No. 2 terminal B and main relay terminal C
- Fuel injector No. 3 terminal B and main relay terminal C
- Fuel injector No. 4 terminal B and main relay terminal C
  
  Fig 1: Identifying Fuel Injector And PCM Connector Terminals
  Courtesy of MAZDA MOTORS CORP.