Open circuit

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