Ambient sensor: Inspection

Check the resistance of ambient temperature sensor between terminals 1 and 2 whether it is changed by changing of the ambient temperature.

Fig 1: Identifying Connector And Terminals Of Ambient Sensor

Courtesy of KIA MOTORS AMERICA, INC.

SPECIFICATIONS OF AMBIENT TEMPERATURE TO RESISTANCE IN TERMINALS 1 AND 2 RELATION

Ambient temperature [°C(°F)]	Resistance between terminals 1and 2 (kΩ
-10(14)	163.131
0 (32)	96.892
10 (50)	59.365
20 (68)	37.147
25(77)	30.0
40(104)	16.032

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