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Home >> Nissan-Datsun >> 2024 >> Sentra SR >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (2 Of 2) >> Component/Circuit Diagnosis >> A/F Sensor 1 Heater >> Component Inspection
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Component Inspection

  1. CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER 
    1. Turn ignition switch OFF.
    2. Disconnect air fuel ratio (A/F) sensor 1 harness connector.
    3. Check resistance between A/F sensor 1 terminals as per the following.
      A/F sensor 1 Condition Resistance
      + -
      Terminal
      3 4 Temperature 25°C (77°F) 1.80 - 2.44 Ω
      1 Not existed
      2
      4 1
      2

    Is the inspection result normal?

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    INSPECTION END

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    GO TO 2.

  2. REPLACE A/F SENSOR 1 

    Replace A/F sensor 1. Refer to Exploded View .

    CAUTION:
    • Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.
    • Before installing new A/F sensor, clean exhaust system threads.

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    INSPECTION END