Hyundai Genesis: Air Conditioning System / Ambient Temperature Sensor Description and Operation
The ambient temperature sensor is located inside the side
mirror 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 operating.
The compressor will operate manually.
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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 ...
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:
Inspection
1. Fuse inspection
Install the test fuse to the switch fuse and relay fuse part in order to confirm a normal joint fit.
2. Inspection of connector by each part
Check whether each connector is damaged, or there is terminal surge or incomplete connection.
[Engine room junction box] ...
Filter inspection
The climate control air filter should
be replaced according to the
Maintenance Schedule. If the vehicle
is operated in severely air-polluted
cities or on dusty rough roads for a
long period, it should be inspected
more frequently and replaced earlier.
When you replac ...