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Home >> Infiniti >> 2012 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0137 To P0463 >> DTC P0453: EVAP Control System Pressure Sensor >> Component Inspection (EVAP Control System Pressure Sensor)
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Component Inspection (EVAP Control System Pressure Sensor)

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

      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 terminals under the following conditions.
    ECM Condition [Applied vacuum kPa (kg/cm2 , psi)] Voltage (V)
    Connector + -
    Terminal Terminal
    E80 143 150 Not applied 1.8 - 4.8
    -26.7 (-0.272, -3.87) 2.1 to 2.5 lower than above value
    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).

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Replace EVAP control system pressure sensor.

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