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. |
Description and operation
Description 1.The photo sensor is located at the center of the defrost nozzles.2.The photo sensor contains a photovoltaic (sensitive to sunlight) diode...
Description
DescriptionThe auto defogging sensor is installed on the front window glass. The sensor judges and sends signal if moisture occurs to blow out wind for defogging...
Other information:
The aspect ratio is lower than 50 on low
aspect ratio tires.
Because low aspect ratio tires are
optimized for handling and braking, their
sidewall is a little stiffer than a standard
tire. Also low aspect ratio tires tend to be
wider and consequently have a greater
contact patch with the road surface...
Repair procedures
InspectionCheck if the auto light control operates like a timing chart shown below. Tail lamp output and head lamp (Low) output is controlled based on the auto light sensor's input (illumination intensity) when the Auto Light Switch in Multi-Function Switch is turned ON, and the vehicle is in IGN1 or IGN2 ON Mode...