Hyundai Sonata: 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.

   
If the ambient temperature is below 1.0°C (33.8°F), the A/C compressor will stop.
The compressor will operate manually.
Photo Sensor Repair procedures
Inspection 1. Turn the ignition switch ON. 2. Connect the GDS. 3. Emit intensive light toward the photo sensor using a lamp, and check the output voltage change. 4. The voltage will ri ...

Ambient Temperature Sensor Repair procedures
Inspection 1. Check the resistance of the ambient temperature sensor between terminals 1 and 2 whether it changes by changing the ambient temperature. 1. Ambient Sensor (+)2. Sensor ground ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Repair procedures
On-vehicle Inspection Inspect ignition coil assembly and Perform spark test 1. Check for DTCs.     • If a DTC is present, perform troubleshooting in accordance with the procedure for that DTC. (Refer to DTC guide) 2. Check if sparks occur. (1) Remove the engi ...

Hyundai Sonata LF 2014-2019 Service Manual: Repair procedures
Replacement     • Be careful not to damage the fender and body.     • When removing the clips, use a clip remover. 1. Remove the front bumper. (Refer to Front Bumper - "Front Bumper Cover") 2. Remove the head lamps. (Refer to Body Ele ...

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