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Home >> Nissan-Datsun >> 2021 >> Frontier PRO-4X >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (6 Of 6) >> DTC/Circuit Diagnosis >> Refrigerant Pressure Sensor >> Component Function Check

Component Function Check

  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

      F79

      108

      (Refrigerant pressure sensor signal)

      125

      [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 .

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