Repair procedures: Inspection

WARNING: This page is about a different car, the 2014 Hyundai Elantra GT and 2013 Hyundai Elantra GT. However, it is still accessible from the selected car via links, so may be relevant.

Turn the ignition switch OFF.
Disconnect the ambient temperature sensor.

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

Fig 1: Checking Resistance Of Ambient Temperature Sensor Between Terminal Positive And Negative

Courtesy of HYUNDAI MOTOR AMERICA

TEMPERATURE AND RESISTANCE SPECIFICATION

Ambient temperature [°C(°F)]	Resistance [kΩ]	Voltage [V]
-30(-22)	480.41	4.71
-20(-4)	271.21	4.50
-10(14)	158.18	4.20
0 (32)	95.10	3.80
10 (50)	58.80	3.31
20 (68)	37.32	2.77
30(86)	24.26	2.24
40(104)	16.13	1.75
50(122)	10.95	1.34

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