Kia Forte: Air Conditioning System / Ambient Temperature Sensor

Kia Forte 2019-2021 (BD) Service 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 1.0°C (33.8°F), the A/C compressor will stop.

The compressor will operate manually.

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 (kΩ)
-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)
24.26
40 (104)
16.13
50 (122)
10.95

Replacement
1.

Disconnect the negative (-) battery terminal.

2.

Remove the engine room under cover.

G 2.0 MPI NU (Refer to Engine Mechanical System - "Engine Room Under Cover")

G 1.6 MPI GAMMA (Refer to Engine Mechanical System - "Engine Room Under Cover")

D 1.6 TCI-NEW U (Refer to Engine Mechanical System - "Engine Room Under Cover")

G 1.6 T-GDI GAMMA (Refer to Engine Mechanical System - "Engine Room Under Cover")

3.

Disconnect the connector and then remove the ambient temperature sensor (A).

4.

To install, reverse the removal procedure.

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