Circuit Open/Short Inspection

Disconnect the PCM connector.
Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)

Fig 1: Identifying Intake Air Temperature Sensor Terminals
Courtesy of MAZDA MOTORS CORP.

Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
  - MAF/IAT sensor terminal D and PCM terminal 1AH
  - MAF/IAT sensor terminal E and PCM terminal 1AA

Short circuit
- If there is continuity, there is a short circuit. Repair or replace the wiring harness.
  - MAF/IAT sensor terminal E and power supply
  - MAF/IAT sensor terminal D and power supply
  - MAF/IAT sensor terminal D and body GND