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Home >> Nissan-Datsun >> 2009 >> Cube Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0181 To P0607 >> DTC P0452: EVAP Control System Pressure Sensor >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connection E38. Refer to "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.
    TERMINAL VOLTAGE REFERENCE CHART

    EVAP control system pressure sensor Ground Voltage
    Connector Terminal
    B21 3 Ground Approx. 5 V

    Is the inspection result normal? 

    YES: GO TO  10.

    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.
    TERMINAL CONTINUITY REFERENCE CHART

    EVAP control system pressure sensor ECM Continuity
    Connector Terminal Connector Terminal
    B21 3 F8 76 Existed

    Is the inspection result normal? 

    YES: GO TO  6.

    NO: GO TO 5.

  5. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors B4, M79
    • Harness connectors M77, E105
    • Harness connectors E8, F1
    • 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 CIRCUIT

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

    TERMINAL REFERENCE CHART

    ECM Sensor
    Connector Terminal Name Connector Terminal
    F8 74 Refrigerant pressure sensor E49 3
    75 CKP sensor (POS) F20 1
    76 EVAP control system pressure sensor B21 3
    77 Battery current sensor F51 1
    E16 102 APP sensor E110 5

    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 8.

    NO: Replace malfunctioning component.

  8. CHECK APP SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO  10.

    NO: GO TO 9.

  9. REPLACE ACCELERATOR PEDAL ASSEMBLY
    1. Replace accelerator pedal assembly
    2. Perform "SPECIAL REPAIR REQUIREMENT ".

    INSPECTION END

  10. 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.
      TERMINAL CONTINUITY REFERENCE CHART

      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B21 1 F8 51 Existed
    4. 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 B4, M79
    • Harness connectors M77, E105
    • Harness connectors E8, F1
    • 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 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.
      TERMINAL CONTINUITY REFERENCE CHART

      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B21 2 F8 42 Existed
    2. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO  14.

    NO: GO TO 13.

  13. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors B4, M79
    • Harness connectors M77, E105
    • Harness connectors E8, F1
    • 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.

  14. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 15.

    NO: Replace EVAP control system pressure sensor.

  15. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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