2013 Toyota Prius TwoFACTORY OEM SERVICE PROCEDURE

Engine Coolant Temperature Sensor: Inspection: Inspection

  1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    Fig 1: Inspecting Engine Coolant Temperature Sensor & Graph
    GTY238224Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Condition Specified Condition
      Approximately 20°C (68°F) 2.32 to 2.59 kΩ
      Approximately 80°C (176°F) 0.310 to 0.326 kΩ
      NOTE:

      When checking the engine coolant temperature sensor in water, keep the terminals dry. After the check, dry the sensor.

      If the resistance is not as specified, replace the engine coolant temperature sensor.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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