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Home >> Infiniti >> 2010 >> M35 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0441 To P1212 >> 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 connections M16, M70. Refer to "GROUND INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace ground connections.

  2. CHECK 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-I
    1. Turn ignition switch ON.
    2. Check the voltage between EVAP control system pressure sensor harness connector and ground.
      CONNECTOR TERMINAL VOLTAGE CHART

      EVAP control system pressure sensor Ground Voltage (V)
      Connector Terminal
      B172 3 Ground Approx. 5
      Fig 1: Checking Voltage Between EVAP Control System Pressure Sensor Terminal 3 And Ground
      G04875257Courtesy of NISSAN MOTOR CO., U.S.A.

      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.
      CONNECTOR TERMINAL CONTINUITY CHART

      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B172 3 M9 107 Existed

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: GO TO 5.

  5. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors B171, B469
    • Harness connectors B418, M66
    • 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 SPECIFICATIONS

    ECM Sensor
    Connector Terminal Name Connector Terminal
    F105 46 Crankshaft position (CKP) sensor F52 1
    F106 64 Camshaft position (CMP) sensor (bank 2) F32 1
    Exhaust valve timing (EVT) control position sensor (bank 2) F83 1
    Battery current sensor E67 1
    M9 103 Accelerator pedal position (APP) sensor E113 5
    107 EVAP control system pressure sensor B172 3
    111 Refrigerant pressure sensor E66 1

    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
    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.
      CONNECTOR TERMINAL CONTINUITY CHART

      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B172 1 M9 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 B171, B469
    • Harness connectors B418, M66
    • 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.
      CONNECTOR TERMINAL CONTINUITY CHART

      EVAP control system pressure sensor ECM Continuity
      Connector Terminal Connector Terminal
      B172 2 M9 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 B171, B469
    • Harness connectors B418, M66
    • 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.

  15. CHECK INTERMITTENT INCIDENT

    Refer to "DESCRIPTION ".

    INSPECTION END

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