Refrigerant Pressure Sensor Inspection [Full-Auto Air Conditioner]

Install the manifold gauge.
Verify the high-pressure side reading of the manifold gauge.
Measure the terminal voltage of the PCM.
- 1AR, 1J or 1AE (MZR 2.5)
- 1AT, 1M or 1BJ (MZI 3.7 V6)
Verify that below graph as measure the terminal voltage 1J (MZR 2.5), 1M (MZI 3.7 V6).
Follow the PCM inspection when measure the other terminal voltage. (See PCM INSPECTION [MZR 2.5] .) (See PCM INSPECTION [MZI 3.7 V6] .)
- Terminal 1AR (MZR 2.5), 1AT (MZI 3.7 V6): 1.0 V or less
- Terminal 1AE (MZR 2.5), 1BJ (MZI 3.7 V6): Approx. 5 V (Ignition switch on)
  - If the each voltage is not normal, inspect the related wiring harness.
    - If there is any malfunction, replace the related wiring harness.
    - If wiring harness is normal, replace the refrigerant pressure sensor.
      
      Fig 1: Identifying Refrigerant Pressure Sensor Connector Terminals (MZR 2.5)
      
      Fig 2: Identifying Refrigerant Pressure Sensor Connector Terminals (MZI 3.7 V6)