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Home >> Nissan-Datsun >> 2005 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U1000 To P0335 (Qr25DE) >> DTC P0125: ECT Sensor >> Component Inspection >> Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor

  1. Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in Fig 1.
    Fig 1: Checking Resistance Between Engine Coolant Temperature Sensor Terminals 1 And 2
    G02450920Courtesy of NISSAN MOTOR CO., U.S.A.

    < Reference data > 

    ECT SENSOR TEMPERATURE VERSUS RESISTANCE REFERENCE DATA

    Engine coolant temperature °C (°F) Resistance kΩ
    20(68) 2.1 - 2.9
    50(122) 0.68 - 1.00
    90(194) 0.236 - 0.260
    Fig 2: ECT Sensor Temperature Versus Resistance Graph
    G02450921Courtesy of NISSAN MOTOR CO., U.S.A.
  2. If NG, replace engine coolant temperature sensor.
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