Kia Rio: Heating,Ventilation, Air Conditioning / Ambient Temperature Sensor

Kia Rio 2017-2025 YB Service Manual / Heating,Ventilation, Air Conditioning / 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 be stopped.The compressor will be operated by manual operating.

Repair procedures

Inspection

1.	Turn the ignition switch OFF.

2.	Disconnect ambient temperature sensor.

Check the resistance of ambient temperature sensor between terminal “+” and “-” whether it is changed by changing of the ambient temperature.

Specification

Ambient temperature [°C(°F)]	Resistance [kΩ]	Voltage [V]
-30(-22)	507	4.720
-20(-4)	284.5	4.522
-10(14)	164.2	4.225
0 (32)	97.5	3.821
10 (50)	59.6	3.322
20 (68)	37.46	2.772
30(86)	24.18	2.227
40(104)	16	1.735
50(122)	10.83	1.323

4.	If the measured resistance is not specification, substitute with a known-good ambient temperature sensor and check for proper operation.

5.	If the problem is corrected, replace the ambient temperature sensor.

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Remove the front bumper. (Refer to Body - "Front Bumper Assembly")

3.	Disconnect the ambient temperature sensor connector (A).

4.	Remove the ambient temperature sensor (A).

5.	Installation is the reverse order of removal.

Photo Sensor (FATC only)

Description and operation Description The photo sensor is located at the center of defrost nozzles. The photo sensor contains a photovoltaic (sensitive to sunlight) diode. The solar ...

Auto Defogging Sensor (FATC only)

Description and operation Description The Auto Defogging Sensor is installed on front windshild glass. The Auto Defogging Sensor senses moisture on the windshild. The air conditioner c ...

Other information:

Kia Rio 2017-2025 YB Owners Manual: High Beam, Light ON, Front Fog Indicator Lights

High Beam Indicator Light This indicator light illuminates: When the headlights are on and in the high beam position When the turn signal lever is pulled into the Flash-to-Pass position. Light ON Indicator Light This indicator light illuminates: • When the tail lights or headlights ...

Kia Rio 2017-2025 YB Owners Manual: System setting and activation

System setting The driver can activate FCA system by placing the ignition switch to the ON position and by selecting 'User Settings' → 'Driver Assistance' → 'Forward Collision-Avoidance Assist (FCA) system'. FCA system deactivates when the driver cancels the system setting. The warning ...