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Home >> Infiniti >> 2012 >> FX35 RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0441 Through P1168 >> 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 M95. 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.
      EVAP control system pressure sensor Ground Voltage (V)
      Connector Terminal
      B252 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.
      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B252 3 M107 107 Existed

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: GO TO 5.

  5. DETECT MALFUNCTIONING PART

    Check the Following:

    • Harness connectors B201, M117
    • Harness for open between ECM and EVAP control system pressure sensor

      : Repair open circuit.

  6. CHECK SENSOR POWER SUPPLY CIRCUIT

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

    ECM Sensor
    Connector Terminal Name Connector Terminal
    F101 46 Crankshaft position (CKP) sensor F2 1
    F102 64 Camshaft position (CMP) sensor (bank 2) F18 1
    Exhaust valve timing (EVT) control position sensor (bank 2) F19 1
    Battery current sensor E21 1
    M107 103 Accelerator pedal position (APP) sensor E112 (Without ICC) 6
    E116 (With ICC) 3
    107 EVAP control system pressure sensor B252 3
    111 Refrigerant pressure sensor E77 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:

  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

    Replace accelerator pedal assembly. Refer to "MODELS WITHOUT DISTANCE CONTROL ASSIST SYSTEM: REMOVAL AND INSTALLATION " (without distance control assist) or "MODELS WITH DISTANCE CONTROL ASSIST SYSTEM: REMOVAL AND INSTALLATION " (without distance control assist).

    : 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.
      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B252 1 M107 112 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 B201, M117
    • Harness for open or short between EVAP control system pressure sensor and ECM

      : Repair open circuit, 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.
      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B252 2 M107 102 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 B201, M117
    • Harness for open or short between EVAP control system pressure sensor and ECM

      : Repair open circuit, 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. Refer to "VQ35HR: REMOVAL AND INSTALLATION ".

  15. CHECK INTERMITTENT INCIDENT

    Perform "INTERMITTENT INCIDENT ".

    : INSPECTION END

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