Ambient Temperature Sensor Inspection (Auto A/C)
WARNING: This page is about a different car, the 2021 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .)
- Remove the ambient temperature sensor. (See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION (AUTO A/C) .)
- Measure the temperature around the ambient temperature sensor and measure the resistance between the ambient temperature sensor terminals A and B.
- If the characteristics of the ambient temperature sensor are not as shown in the graph, replace the ambient temperature sensor. (See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION (AUTO A/C) .)