2021 Nissan-Datsun Sentra SFACTORY OEM SERVICE PROCEDURE

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.

      ECM

      Condition

      [Applied vacuum kPa (kg/cm 2 , psi)]

      Voltage

      Connector

      +

      -

      Terminal

      E16

      131

      158

      Not applied

      0.5 - 4.6 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.
      • Never apply below -93.3 kPa (-0.952 kg/cm 2 , -13.53 psi) or pressure over 101.3 kPa (1.033 kg/cm 2 , 14.69 psi).

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace EVAP control system pressure sensor. Refer to Exploded View .

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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