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Home >> Infiniti >> 2013 >> FX37 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0222 To P1088 >> 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 M164 107 Existed

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: GO TO 5.

  5. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors M117, B201
    • Harness connectors B101, B102
    • 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
    F112 46 CKP sensor (POS) F2 1
    M161 103 APP sensor E112(1) 6
    E116(2) 3
    107 EVAP control system pressure sensor B252 3
    Refrigerant pressure sensor E77 3
    (1) Without ICC
    (2) With ICC

    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 component.

  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. Go 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.
      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B252 1 M164 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 connectors B101, B102
    • 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 M164 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 connectors B101, B102
    • 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 "VQ37VHR: EXPLODED VIEW ".

  15. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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