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Home >> Nissan-Datsun >> 2005 >> Quest Base >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System >> DTC P0128: Thermostat Function >> Component Inspection >> Engine Coolant Temperature Sensor
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Engine Coolant Temperature Sensor

  1. Check resistance between engine coolant temperature sensor terminals 1 and 2.
    Fig 1: Checking Engine Coolant Temperature Sensor Resistance
    G02446951Courtesy of NISSAN MOTOR CO., U.S.A.

    < Reference data> 

    ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE TABLE

    Temperature °C (°F) Resistance kΩ
    20 (68) 2.1 - 2.9
    50 (122) 0.68 - 1.0
    90 (194) 0.236 - 0.260
  2. If NG, replace engine coolant temperature sensor.
    Fig 2: Resistance/Temperature Graph
    G02446952Courtesy of NISSAN MOTOR CO., U.S.A.
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