Hyundai Elantra: Air Conditioning System / Ambient Temperature Sensor
Description and operation
The ambient temperature sensor is located at the front of the condenser and detects ambient air temperature. It is a negative type thermistor; resistance will increase with lower temperature, and decrease with higher temperature.
The sensor output will be used for discharge temperature control, temperature regulation door control, blower motor level control, mix mode control and in-car humidity control.
Repair procedures
1. | Check the resistance of the ambient temperature sensor between terminals 1 and 2 whether it changes by changing the ambient temperature. Sensor resistance
Ambient temperature [°C (°F)]
| Resistance between terminal 1 and 2 (kΩ)
| -30 (-22)
| 480.41
| -20 (-4)
| 271.21
| -10 (14)
| 158.18
| 0 (32)
| 95.096
| 10 (50)
| 58.799
| 20 (68)
| 37.315
| 30 (86)
| 24.26
| 40 (104)
| 16.13
| 50 (122)
| 10.95
|
1. Ambient Sensor (+) 2. Sensor ground
|
|
1. | Disconnect the negative (-) battery terminal. |
2. | Remove the front bumper. (Refer to Body - "Front Bumper Assembly") |
3. | Disconnect the connector (A) and then remove the ambient temperature sensor (B). |
4. | To install, reverse the removal procedure. |
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Schematic diagrams
ECM Terminal And Input/Output signalECM Terminal FunctionConnector [A]
Pin No
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