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Home >> Nissan-Datsun >> 2009 >> Cube Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0181 To P0607 >> DTC P0451: EVAP Control System Pressure Sensor >> Component Inspection
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Component Inspection

  1. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
    1. Turn ignition switch OFF.
    2. Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.

      Always replace O-ring with a new one. 

    3. Install a vacuum pump to EVAP control system pressure sensor.
    4. Turn ignition switch ON and check output voltage between ECM harness connector and ground under the following conditions.
    TERMINAL VOLTAGE REFERENCE CHART

    ECM Condition [Applied vacuum kPa (kg/cm2 , psi) Voltage
    Connector Terminal
    F8 42 (EVAP control system pressure sensor signal) Not applied 1.8 - 4.8 V
    -26.7 (-0.272, -3.87) 2.1 to 2.5 V lower than above value
    CAUTION:
    • Always calibrate the vacuum pump gauge when using it.
    • Do not apply below -93.3 kPa (-0.952 kg/cm2 , -13.53 psi) or pressure over 101.3 kPa (1.033 kg/cm2 , 14.69 psi).

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Replace EVAP control system pressure sensor

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