Hyundai Sonata: Air Conditioning System / 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

Specification
Ambient temperature
[°C (°F)]
Resistance between terminal 1 and 2 (k?)
-40 (-40)
881.03
-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)
24.260
40 (104)
16.130
50 (122)
10.950
60 (140)
7.579
70 (158)
5.341
80 (176)
3.828

Diagnosis With GDS
1.
The heating, ventilation and air conditioning can be quickly diagnosed failed parts with vehicle diagnostic system (GDS).
? The diagnostic system (GDS) provides the following information.
(1) Self diagnosis: Checking the failure code (DTC) and display.
(2) Current data: Checking the system input/output data state.
(3) Actuation test: Checking the system operation condition.
(4) Additional function: Other controlling such as he system option and zero point adjustment.
2.
Select the 'Car model' and the system to be checked in order to check the vehicle with the tester.
3.
Select the 'Current data' menu to search the current state of the input/output data.
The input/output data for the sensors corresponding to the Ambient Temperature Sensor can be checked.

Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the front bumper.
(Refer to Body - "Front Bumper Cover")
3.
Disconnect the connector (A) and then remove the ambient temperature sensor (B).

4.
Install in the reverse order of removal.
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 te ...

Heater
...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Description and Operation
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Hyundai Sonata LF 2014-2019 Service Manual: Repair procedures
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