FixVault
Home › Nissan-Datsun › 2006 › 350Z 2D Convertible, Automatic › Repair and Diagnosis › Engine Performance › Testing & Diagnosis › Engine Control System - Component And System Testing › Refrigerant Pressure Sensor › Diagnostic Procedure

Diagnostic Procedure

  1. CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION 
    1. Start engine and warm it up to normal operating temperature.
    2. Turn A/C switch and blower fan switch ON.
    3. Check voltage between ECM terminal 70 and ground with CONSULT-II or tester.
      Fig 1: Checking Voltage Between ECM Connector Terminal 70 And Ground
      G04077918Courtesy of NISSAN NORTH AMERICA, INC.

      Voltage: 1.0 - 4.0V 

    OK or NG 

    1. OK : INSPECTION END 
    2. NG : GO TO 2.
  2. CHECK GROUND CONNECTIONS 
    1. Turn A/C switch and blower fan switch OFF.
    2. Stop engine.
    3. Turn ignition switch OFF.
    4. Loosen and retighten three ground screws on the body. Refer to "GROUND INSPECTION ".
      Fig 2: Locating Body Ground Screws
      G04080459Courtesy of NISSAN NORTH AMERICA, INC.

    OK or NG 

    1. OK : GO TO 3.
    2. NG : Repair or replace ground connections.
  3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT 
    1. Disconnect refrigerant pressure sensor harness connector.
    2. Turn ignition switch ON.
      Fig 3: Disconnecting Refrigerant Pressure Sensor Harness Connector
      G04081145Courtesy of NISSAN NORTH AMERICA, INC.
    3. Check voltage between refrigerant pressure sensor terminal 1 and ground with CONSULT-II or tester.

      Voltage: Approximately 5V 

      Fig 4: Checking Voltage Between Refrigerant Pressure Sensor Terminal 1 And Ground
      G04081146Courtesy of NISSAN NORTH AMERICA, INC.

    OK or NG 

    1. OK : GO TO  5.
    2. NG : GO TO 4.
  4. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E251, E31
    • Harness connectors E10, F1
    • Harness for open or short between ECM and refrigerant pressure sensor
    1. : Repair open circuit or short to ground or short to power in harness or connectors.
  5. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between refrigerant pressure sensor terminal 3 and ECM terminal 67. Refer to WIRING DIAGRAM .

      Continuity should exist  .

    4. Also check harness for short to ground and short to power.

    OK or NG 

    1. OK : GO TO  7.
    2. NG : GO TO 6.
  6. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E251, E31
    • Harness connectors E10, F1
    • Harness for open or short between ECM and refrigerant pressure sensor
    1. : Repair open circuit or short to ground or short to power in harness or connectors.
  7. CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2. Refer to WIRING DIAGRAM .

      Continuity should exist  .

    2. Also check harness for short to ground and short to power.

    OK or NG 

    1. OK : GO TO  9.
    2. NG : GO TO 8.
  8. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E251, E31
    • Harness connectors E10, F1
    • Harness for open or short between ECM and refrigerant pressure sensor
    1. : Repair open circuit or short to ground or short to power in harness or connectors.
  9. CHECK INTERMITTENT INCIDENT 

    Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    OK or NG 

    1. OK : Replace refrigerant pressure sensor.
    2. NG : Repair or replace.
About FixVault