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Home >> Nissan-Datsun >> 2009 >> Xterra SE, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0181 To P0550 >> P0451 EVAP Control System Pressure Sensor >> Component Inspection >> EVAP Control System Pressure Sensor

EVAP Control System Pressure Sensor

  1. Remove EVAP control system pressure sensor with its harness connector.

    Do not reuse the O-ring, replace it with a new one. 

  2. Install a vacuum pump to EVAP control system pressure sensor.
  3. Turn ignition switch ON and check output voltage between ECM terminal 32 and ground under the following conditions.
    VOLTAGE REFERENCE CHART

    Applied vacuum kPa (kg/cm2 psi) Voltage V
    Not applied 1.8 - 4.8
    -26.7 (-0.272, -3.87) 2.1 to 2.5V lower than above value
    Fig 1: Checking Output Voltage Between ECM Terminal 32 And Ground
    G04900507Courtesy of NISSAN MOTOR CO., U.S.A.
    CAUTION:
    • Always calibrate the vacuum pump gauge when using it.
    • Never 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).
  4. If NG, replace EVAP control system pressure sensor.
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