Hyundai Santa Fe (TM): Air conditioning System / Ambient Temperature Sensor. Description and operation

Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual / Heating,Ventilation And Air Conditioning / Air conditioning System / Ambient Temperature Sensor. Description and operation

Description
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.
  
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If the ambient temperature is below 1.0°C (33.8°F), the A/C compressor will stop.
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The compressor will operate manually.

    Inspection 1. Emit intensive light toward the photo sensor using a lamp, and check the output voltage change. 2.

    Inspection 1. Check the resistance of the ambient temperature sensor between terminals 1 and 2 whether it changes by changing the ambient temperature.

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