Evaporator Temperature Sensor Inspection

WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Inspect the evaporator temperature sensor when it is installed to the A/C unit.
1. Set the fan switch to 4th speed.
2. Set the temperature control to MAX COLD.
3. Set the air intake mode to RECIRCULATE.
4. Turn the A/C switch off.
5. Close all of the doors and roll up all the windows.
6. Wait for 5 min.
7. Disconnect the evaporator temperature sensor connector.
8. Measure the temperature at the air intake.
9. Measure the resistance between evaporator temperature sensor terminals.
If the characteristics of the evaporator temperature sensor are not as shown in the graph, replace the evaporator temperature sensor.

Fig 1: Inspecting Evaporator Temperature Sensor
Courtesy of MAZDA MOTORS CORP.