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Nissan Sentra B18 (2020-2025) Service Manual: Refrigerant Pressure Sensor

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Component Parts /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 under the following conditions.

      ECM

      Voltage

      Connector

      +

      –

      Terminal

      F24

      48

      45

      1.0 – 4.0 V

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY

    1. Turn ignition switch OFF.

    2. Disconnect refrigerant pressure sensor harness connector.

    3. Turn ignition switch ON.

    4. Check the voltage between refrigerant pressure sensor harness connector and ground.

      +

      −

      Voltage

      (Approx.)

      Refrigerant pressure sensor

      Connector

      Terminal

      E35

      3

      Ground

      5 V

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    GO TO 2.

  2. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT

    1. Turn ignition switch ON.

    2. Disconnect ECM harness connector.

    3. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.

      Refrigerant pressure sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E35

      3

      F24

      43

      Existed

    4. Also check harness for short to power.

    Is the inspection result normal?

    YES >>

    Perform trouble diagnosis for power supply circuit.

    NO >>

    Repair or replace malfunctioning part.

  3. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT

    1. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.

      Refrigerant pressure sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E35

      1

      F24

      45

      Existed

    2. Also check harness for short to power.

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair or replace malfunctioning part.

  4. CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT

    1. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.

      Refrigerant pressure sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E35

      2

      F24

      48

      Existed

    2. Also check harness for short to power.

    Is the inspection result normal?

    YES >>

    GO TO 5.

    NO >>

    Repair or replace malfunctioning part.

  5. CHECK INTERMITTENT INCIDENT

    Check intermittent incident. Refer to Intermittent Incident.

    Is the inspection result normal?

    YES >>

    Replace refrigerant pressure sensor. Refer to Removal and Installation.

    NO >>

    Repair or replace malfunctioning part.

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