Evaporator Temperature Sensor Inspection [Manual Air Conditioner]

1. Set the fan speed MAX HI.
2. Set the temperature control at MAX COLD (Turn the left).
3. Turn the A/C switch off.
4. Set the RECIRCULATE mode.
5. Close all doors and windows.
6. Wait for 5 min. 
7. Remove the glove compartment. (See GLOVE COMPARTMENT REMOVAL/INSTALLATION .)
8. Disconnect the evaporator temperature sensor connector. (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER] .)
9. Measure the temperature at the blower inlet.
10. Measure the resistance between terminals of the evaporator temperature sensor.

• If the resistance is not as shown in the graph, replace the evaporator temperature sensor.

Fig 1: Evaporator Temperature Sensor Resistance Graph

Courtesy of MAZDA MOTORS CORP.