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HOMESERVICE MANUALSNISSAN-DATSUN2024FRONTIER SL, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM (DTC/CIRCUIT DIAGNOSIS) (6 OF 6)DTC/CIRCUIT DIAGNOSISREFRIGERANT PRESSURE SENSORDIAGNOSIS PROCEDURE
2024 Nissan-Datsun Frontier SL, RWD

Diagnosis Procedure

2024 Nissan-Datsun Frontier SL, RWDSECTION Diagnosis Procedure
  1. CHECK GROUND CONNECTION 
    1. Turn A/C switch and blower fan switch OFF.
    2. Turn ignition switch OFF.
    3. Check ground connection E24. Refer to Ground Inspection in Intermittent Incident .

    Is the inspection result normal?

    >>

    GO TO 2.

    >>

    Repair or replace ground connection.

  2. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY 
    1. Disconnect refrigerant pressure sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between refrigerant pressure sensor harness connector and ground.
      + - Voltage (Approx.)
      Refrigerant pressure sensor
      Connector Terminal
      E48 3 Ground 5 V

    Is the inspection result normal?

    >>

    GO TO 5.

    >>

    GO TO 3.

  3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    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
      E48 3 F79 136 Existed
    4. Also check harness for short to power and short to ground.

    Is the inspection result normal?

    >>

    GO TO 4.

    >>

    Repair or replace error-detected parts.

  4. CHECK SENSOR POWER SUPPLY 2 CIRCUIT 

    Refer to Diagnosis Procedure .

    Is the inspection result normal?

    >>

    Perform the trouble diagnosis for ECM power supply circuit. Refer to Diagnosis Procedure .

    >>

    Repair or replace error-detected parts.

  5. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    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
      E48 1 F79 125 Existed
    4. Also check harness for short to power and short to ground.

    Is the inspection result normal?

    >>

    GO TO 6.

    >>

    Repair or replace error-detected parts.

  6. CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.
      Refrigerant pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      E48 2 F79 108 Existed
    2. Also check harness for short to power and short to ground.

    Is the inspection result normal?

    >>

    GO TO 7.

    >>

    Repair or replace error-detected parts.

  7. CHECK INTERMITTENT INCIDENT 

    Refer to Intermittent Incident .

    Is the inspection result normal?

    >>

    Replace refrigerant pressure sensor. Refer to Removal and Installation .

    >>

    Repair or replace error-detected parts.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.