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Home >> Infiniti >> 2017 >> QX60 Hybrid, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (Hybrid) (2 Of 3) >> DTC/Circuit Diagnosis >> DTC P0452: EVAP Control System Pressure Sensor >> Component Inspection (EVAP Control System Pressure Sensor) >> Diagnostic Test

Diagnostic Test

  1. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

    1. Turn ignition switch OFF.
    2. Remove EVAP control system pressure sensor with its harness connector.
      NOTE:

      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 as follows.
      ECM Condition (Applied vacuum) Voltage
      Connector + -
      Terminal Terminal
      E16 121 148 Not applied 0.5 - 4.6 V
      -26.7 kPa (-0.267 bar, -0.272 kg/cm2 , -3.87 psi) 2.1 to 2.5 V lower than above value
      CAUTION:
      • Always calibrate the vacuum pump gauge when using it.
      • Never apply below - 93.3 kPa (-0.933 bar, - 0.952 kg/cm2 , - 13.53 psi) or pressure over 106.7 kPa (1.067 bar, 1.088 kg/cm2 , 15.47 psi).

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Replace EVAP control system pressure sensor. Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS .