Resistance Inspection: Notes

WARNING: This page is about a different variant/trim than selected.

Remove the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
Place the ECT sensor in water with a thermometer, and heat the water gradually.
Measure the resistance between ECT sensor terminals A and B using an ohmmeter.
- If the ECT sensor is okay, but the PID value is out of specification, perform the "Circuit Open/Short Inspection".
- If not as specified, replace the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION .)
  
  Fig 1: Identifying Engine Coolant Temperature Sensor
  Courtesy of MAZDA MOTORS CORP.