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Home >> Infiniti >> 2013 >> FX50 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0137 Through P0456 >> DTC P0453: 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 EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR 
    1. Disconnect EVAP control system pressure sensor harness connector.
    2. Check that water is not inside connectors.

      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 
    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 F111 95 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 connectors M116, F103
    • 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
    F111 87 Crankshaft position sensor F2 1
    91 Camshaft position sensor (bank 1) F84 1
    EVT control position sensor (bank 1) F59 1
    95 Battery current sensor E21 1
    EVAP control system pressure sensor B252 3
    Manifold absolute pressure sensor F65 1
    M160 99 APP sensor 2 (Without ICC) E112 6
    APP sensor 2 (With ICC) E116 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  20.

    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.
      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B252 1 F111 70 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 M116, F103
    • 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 F111 80 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 M116, F103
    • 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 RUBBER TUBE 
    1. Disconnect rubber tube connected to EVAP canister vent control valve.
    2. Check the rubber tube for clogging.

      Is the inspection result normal? 

      YES: GO TO 15.

      NO: Clean the rubber tube using an air blower, repair or replace rubber tube.

  15. CHECK EVAP CANISTER VENT CONTROL VALVE 

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 16.

    NO: Replace EVAP canister vent control valve. Refer to "VK50VE: EXPLODED VIEW ".

  16. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR 

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 17.

    NO: Replace EVAP control system pressure sensor. Refer to "VK50VE: EXPLODED VIEW ".

  17. CHECK IF EVAP CANISTER IS SATURATED WITH WATER 
    1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached. Refer to "VK50VE: EXPLODED VIEW ".
    2. Check if water will drain from the EVAP canister (1).
      • EVAP canister vent control valve (2)

      Does water drain from EVAP canister? 

      YES: GO TO 18.

      NO: GO TO  20.

      Fig 1: Checking EVAP Canister For Water Saturation
      G09001478Courtesy of NISSAN NORTH AMERICA, INC.
  18. CHECK EVAP CANISTER 

    Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.

    The weight should be less than 2.1 kg (4.6 lb). 

    Is the inspection result normal? 

    YES: GO TO  20.

    NO: GO TO 19.

  19. DETECT MALFUNCTIONING PART 

    Check the following.

    • EVAP canister for damage
    • EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

      : Repair hose or replace EVAP canister. Refer to "VK50VE: REMOVAL AND INSTALLATION ".

  20. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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