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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 616 (Engine Control System (DTC/Circuit Diagnosis) (17 Of 17)) >> Circuit Diagnosis >> Refrigerant Pressure Sensor >> Component Function Check

Component Function Check

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK REFRIGERANT PRESSURE SENSOR FUNCTION 
    1. Start engine and warm it up to normal operating temperature.
    2. Turn A/C switch and blower fan switch ON.
    3. Check the voltage between ECM harness connector terminals as per the following.

      ECM

      Condition

      Voltage

      +

      -

      Connector

      Terminal

      Connector

      Terminal

      F78

      70

      (Refrigerant pressure sensor signal)

      F79

      97

      [Engine is running]

      • Warm-up condition
      • Idle speed
      • Both A/C switch and blower fan motor switch: ON (Compressor operates)

      1.0 - 4.0 V

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Proceed to Diagnosis Procedure .