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Home >> Infiniti >> 2018 >> QX80 AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 2) >> Component/Circuit Diagnosis >> Engine Coolant Temperature Sensor >> Component Inspection
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Component Inspection

  1. CHECK ENGINE COOLANT TEMPERATURE SENSOR 1 
    1. Turn ignition switch OFF.
    2. Disconnect engine coolant temperature sensor 1 harness connector.
    3. Remove engine coolant temperature sensor 1.
    4. Check resistance between engine coolant temperature sensor 1 terminals by heating with hot water as shown in the figure, below.
      G08855388Courtesy of NISSAN NORTH AMERICA, INC.

      Terminals

      Condition

      Resistance (k Ohms)

      1 and 2

      Temperature [ deg. C (deg. F)]

      20 (68)

      2.35 - 2.73

      50 (122)

      0.68 - 1.00

      90 (194)

      0.236 - 0.260

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace engine coolant temperature sensor 1. Refer to Exploded View .