Nissan Sentra B18 (2020-2025) Service Manual: Fuel Tank Vacuum Relief Valve
Component Inspection
Component Inspection
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CHECK FUEL FILLER CAP
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Turn ignition switch OFF.
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Remove fuel filler cap.
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Wipe clean valve housing.
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Install fuel filler cap adapter (commercial service tool) to fuel filler cap.
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Check valve opening pressure and vacuum.
Pressure:
15.3 – 20.0 kPa (0.156 – 0.204 kg/cm2, 2.22 – 2.90 psi)
Vacuum:
−6.0 to −3.4 kPa (−0.061 to −0.035 kg/cm2, −0.87 to −0.49 psi)
Is the inspection result normal?
YES >>INSPECTION END
NO >>GO TO 2.
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REPLACE FUEL FILLER CAP
Replace fuel filler cap.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may illuminate.
>>INSPECTION END
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