LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2008 >> ES 350 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - System & Component Testing, Removal, Inspection & Installation >> Engine Coolant Temperature Sensor >> Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Engine Coolant Temperature Sensor: Inspection

  1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR 
    1. Measure the resistance between the terminals.

      Standard Resistance 

      TERMINALS RESISTANCE CHART

      Condition Specified Condition
      Approx. 20°C (68°F) 2.32 to 2.59 kΩ
      Approx. 80°C (176°F) 0.31 to 0.326 kΩ
      Fig 1: Measuring Resistance Between Engine Coolant Temperature Sensor Terminals
      G04973882Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the sensor.

      NOTE: If checking the ECT sensor in the water, keep the terminals dry. After checking, dry the sensor.
scientia non olet · About LEMON Manuals