Evaporator Temperature Sensor Inspection
WARNING: This page is about a different car, the 2017 Mazda CX-9. 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.
- Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
- Remove the console side panel (passenger-side). (See CONSOLE SIDE PANEL REMOVAL/INSTALLATION .)
- Remove the side wall (passenger-side). (See SIDE WALL REMOVAL/INSTALLATION .)
- Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
- Switch the ignition ON (engine on).
- Set the fan speed to MAX HI.
- Set the temperature control to MAX COLD.
- Set to the RECIRCULATE mode.
- Turn the A/C switch off.
- Close all doors and windows.
- Wait for 5 min.
- Switch the ignition off.
- Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
- Disconnect the evaporator temperature sensor connector. (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION .)
- Measure the temperature at the blower inlet.
- Measure the resistance between the evaporator temperature sensor terminals A and B.
- If the resistance is not as shown in the graph, replace the evaporator temperature sensor. (See FRONT A/C UNIT DISASSEMBLY/ASSEMBLY .)