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Home › Infiniti › 2011 › QX56 AWD › Repair and Diagnosis › Engine Performance › System › Engine Control System - DTCS U0101 Through P0153 › DTC P0116: ECT Sensor › Component Inspection (Engine Coolant Temperature Sensor)

Component Inspection (Engine Coolant Temperature Sensor)

  1. CHECK ENGINE COOLANT TEMPERATURE SENSOR
    1. Turn ignition switch OFF.
    2. Disconnect engine coolant temperature sensor harness connector.
    3. Remove engine coolant temperature sensor.
    4. Check resistance between engine coolant temperature sensor terminals by heating with hot water as shown in the figure.
      RESISTANCE SPECIFICATION

      Terminals Condition Resistance (kΩ)
      1 and 2 Temperature [°C (°F)] 20 (68) 2.35 - 2.73
      50 (122) 0.68 - 1.00
      90 (194) 0.236 - 0.260
      Fig 1: Checking Engine Coolant Temperature Sensor
      G04886485Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Replace engine coolant temperature sensor. Refer to "EXPLODED VIEW ".

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