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Home › Nissan-Datsun › 2008 › Altima Hybrid › Repair and Diagnosis › Engine Performance › Engine Control Systems › Engine Control System (Hybrid) › Component Diagnosis › P0452 EVAP Control System Pressure Sensor › Diagnosis Procedure

Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connection E9. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

    Is the inspection result normal? 

    YES : GO TO 2.

    NO : Repair or replace ground connection.

  2. CHECK CONNECTOR
    1. Disconnect EVAP control system pressure sensor harness connector.
    2. Check sensor harness connector for water.

      Water should not exist. 

    Is the inspection result normal? 

    YES : GO TO 3.

    NO : Repair or replace harness connector.

  3. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-I
    1. Turn ignition switch ON.
    2. Check the voltage between EVAP control system pressure sensor harness connector and ground.
      VOLTAGE SPECIFICATION

      EVAP control system pressure sensor Ground Voltage
      Connector Terminal
      B41 3 Ground Approx. 5V

    Is the inspection result normal? 

    YES : GO TO  8.

    NO : GO TO 4.

  4. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-II
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.
      TERMINALS CONTINUITY REFERENCE

      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B41 3 E10 91 Existed

    Is the inspection result normal? 

    YES : GO TO  6.

    NO : GO TO 5.

  5. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors B10, E29
    • Harness for open or short between EVAP control system pressure sensor and ECM

    Repair open circuit or short to ground or short to power in harness or connectors.

  6. CHECK SENSOR POWER SUPPLY CIRCUITS

    Check harness for short to power and short to ground, between the following terminals.

    ECM AND SENSORS TERMINALS REFERENCE

    ECM Sensor
    Connector Terminal Name Connector Terminal
    F13 72 Refrigerant pressure sensor E219 1
    76 CKP sensor (POS) F30 1
    E10 91 EVAP control system pressure sensor B41 3

    Is the inspection result normal? 

    YES : GO TO 7.

    NO : Repair short to ground or short to power in harness or connectors.

  7. CHECK COMPONENTS

    Check the following.

    Is the inspection result normal? 

    YES : GO TO  13.

    NO : Replace malfunctioning component.

  8. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.
      TERMINALS CONTINUITY REFERENCE

      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B41 1 E10 96 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES : GO TO  10.

    NO : GO TO 9.

  9. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors B10, E29
    • Harness for open or short between EVAP control system pressure sensor and ECM

    Repair open circuit or short to ground or short to power in harness or connectors.

  10. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.
      TERMINALS CONTINUITY REFERENCE

      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B41 2 E10 86 Existed
    2. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES : GO TO  12.

    NO : GO TO 11.

  11. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors B10, E29
    • Harness for open or short between EVAP control system pressure sensor and ECM

    Repair open circuit or short to ground or short to power in harness or connectors.

  12. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES : GO TO 13.

    NO : Replace EVAP control system pressure sensor.

  13. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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