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Home >> Nissan-Datsun >> 2009 >> Murano SL, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0171 To P0453 >> P0452 EVAP Control System Pressure Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connection E38. 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.
      TERMINALS VOLTAGE REFERENCE

      EVAP control system pressure sensor Ground Voltage (V)
      Connector Terminal
      B17 3 Ground Approx. 5

      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

      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B17 3 E16 91 Existed

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: GO TO 5.

  5. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors B4, E104
    • Harness for open or short between EVAP control system pressure sensor and ECM

      Repair open circuit.

  6. CHECK SENSOR POWER SUPPLY CIRCUIT

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

    ECM TERMINALS REFERENCE

    ECM Sensor
    Connector Terminal Name Connector Terminal
    F8 72 Refrigerant pressure sensor E300 1
    76 CKP sensor (POS) F20 1
    E16 87 APP sensor E110 5
    91 EVAP control system pressure sensor B17 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.

    • Crankshaft position sensor (POS) (Refer to "COMPONENT INSPECTION ".)
    • Refrigerant pressure sensor (Refer to "DIAGNOSIS PROCEDURE ".)

      Is the inspection result normal? 

      YES: GO TO 8.

      NO: Replace malfunctioning components.

  8. CHECK APP SENSOR

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO  15.

    NO: GO TO 9.

  9. REPLACE ACCELERATOR PEDAL ASSEMBLY
    1. Replace accelerator pedal assembly.
    2. Refer to "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

      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B17 1 E16 96 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, E104
    • 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

      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B17 2 E16 86 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, E104
    • 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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