Kia Optima: Air Conditioning System / Ambient Temperature Sensor

Kia Optima DL3 2019-2025 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.

•	If the ambient temperature is below 2.0°C (35.6°F), the A/C compressor will stop. The compressor will operate manually.

Repair procedures

Inspection

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 (kΩ)
-30 (-22)	480.41
-20 (-4)	271.21
-10 (14)	158.18
0 (32)	95.10
10 (50)	58.50
20 (68)	37.32
30 (86)	24.26
40 (104)	16.13
50 (122)	10.95

Replacement

1.	Disconnect the negative (-) battery terminal.

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

3.	Separate the connector (A) and remove the ambient temperature sensor (B).

To install, reverse the removal procedure.

•	Make sure connectors are connected properly.

Photo Sensor

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

Auto Defogging Sensor

Description and operation Description The auto defogging sensor is installed on the front window glass. The sensor judges and sends signal if moisture occurs to blow out wind for defog ...

Other information:

Kia Optima DL3 2019-2025 Service and Repair Manual: Starter

Description and operation Description The starting system includes the battery, starter, solenoid switch, ignition switch, inhibitor switch (A/T), clutch pedal switch (M/T), ignition lock switch, connection wires and the battery cable. When the ignition key is turned to the start ...

Kia Optima DL3 2019-2025 Owner's Manual: Transmission ranges

The indicator in the instrument cluster displays the shift lever position when the ignition switch is in the ON position. P (Park) Always come to a complete stop before shifting into P (Park). This position locks the transmission and prevents the drive wheels from rotating. Shifting into P (P ...