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Home >> Infiniti >> 2005 >> G35 x >> Repair and Diagnosis >> Engine Performance >> Engine Control System - Sedan >> 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 as shown in the figure.
    Fig 1: Checking Resistance Between Engine Coolant Temperature Sensor Terminals 1 And 2
    G02348416Courtesy of NISSAN MOTOR CO., U.S.A.

    < Reference data > 

    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
  2. If NG, replace engine coolant temperature sensor.
    Fig 2: Temperature/Resistance Graph
    G02348417Courtesy of NISSAN MOTOR CO., U.S.A.
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