2021 Nissan-Datsun Sentra SFACTORY OEM SERVICE PROCEDURE

Component Function Check

  1. START 

    Make sure that all of the following conditions are satisfied.

    • Vehicle driven distance: More than 5, 000 km (3, 107 miles)
    • Atmospheric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm 2 , 14.25 - 15.12 psi)
    • Atmospheric temperature: 20 - 30 deg. C (68 - 86 deg. F)
    • Engine coolant temperature: 75 - 95 deg. C (167 - 203 deg. F)
    • Transmission: Warmed-up
      • After the engine is warmed up to normal operating temperature, drive vehicle until "ATF TEMP SEN" (CVT fluid temperature sensor signal) indicates more than 60 deg. C (140 deg. F).
    • Electrical load: Not applied*
    • Engine speed: Idle

    *: Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight ahead.

    GO TO 2.

  2. CHECK REFERENCE OF DATA MONITOR MODE 

    SYMBOL With CONSULT

    NOTE: Perform "Reference" in "DATA MONITOR" mode in maximum scale display.
    1. Refer to Work Procedure .
    2. On CONSULT screen, select "ENGINE">>"Data Monitor".
    3. Select "Reference" and change "DISPLAY TYPE" to "Line Graph".
    4. Select "B/FUEL SCHDL", "A/F ALPHA-B1" and "MASS AIR FLOW SENSOR (Hz)".
    5. Make sure that monitor items are within the SP value.

    Is the inspection result normal?

    YES

    END

    NO

    Refer to Diagnosis Procedure .

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.