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Home >> Infiniti >> 2023 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (Diagnostics) (1 Of 2) >> Component Parts /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.
      GNSDB6524Courtesy of NISSAN NORTH AMERICA, INC.

      Terminals

      Condition

      Resistance (kOhm)

      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 CYLINDER HEAD : Exploded View .