Refrigerant Pressure Sensor No. 2

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

Install the manifold gauge. (See MANIFOLD GAUGE SET CONNECTION .)
Verify the high-pressure side reading of the manifold gauge.
Measure the terminal voltage at PCM terminal 1D, 1AU and 1BH.
Using the graph below, measure and verify the terminal voltages at 1AU.
Follow the PCM inspection when measuring the other terminal voltages. (See PCM INSPECTION [SKYACTIV-G (VIN M (US))] .) (See PCM INSPECTION [SKYACTIV-G (VIN L (US))] .)
- Terminal 1D: Approx. 5 V (Ignition switch ON)
- Terminal 1BH: 1.0 V or less
  - If each voltage is not normal, inspect the related wiring harness.
- If there is any malfunction, replace the related wiring harness.
- If the wiring harness is normal, replace the refrigerant pressure sensor.

Courtesy of MAZDA MOTORS CORP.