Water Temperature Sensor Inspection

WARNING: This page is about a different car, the 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Measure the temperature around the water temperature sensor.
Measure the resistance between terminals of the water temperature sensor.
- If the resistance is not as shown in the graph, replace the water temperature sensor.
  
  Fig 1: Water Temperature Sensor Resistance & Temperature Graph
  Courtesy of MAZDA MOTORS CORP.