Engine Coolant Temperature Sensor (ECTS): Testing

Using Hi-scan

Fig 1: ECTS Hi Scan Resistance Chart
Courtesy of KIA MOTORS AMERICA, INC.
Using multi-tester
1. Remove the engine coolant temperature sensor from air intake manifold.
2. Soak the sensor part of the engine coolant temperature sensor to hot water and check the resistance value.
  
  Fig 2: ECTS Multi-Tester Resistance Chart
  Courtesy of KIA MOTORS AMERICA, INC.
  
  Fig 3: Testing ECTS
  Courtesy of KIA MOTORS AMERICA, INC.
3. Replace the sensor if the resistance deviates from the standard value.