Hyundai Elantra: Engine Control System / Ambient Temperature Sensor (ATS)

Hyundai Elantra (CN7) 2021-2025 Service Manual / Engine Control / Fuel System / Engine Control System / Ambient Temperature Sensor (ATS)

Description and operation

Description

Ambient Temperature Sensor (ATS) is installed on the front-end module and senses the ambient temperature.

This sensor is exposed to the ambient air temperature in front of the radiator.

The ATS is a Negative Temperature Coefficient (NTC)-type sensor and its resistance is in inverse proportion to the temperature.

Specifications

Specification

Temperature [°C (°F)]	Resistance (kΩ)
-40 (-40)	841.2 - 1019.3
-20 (-4)	263.8 - 306.5
0 (32)	92.4 - 102.8
10 (50)	57.0 - 62.2
20 (68)	36.2 - 38.8
40 (104)	15.3 - 16.7
50 (122)	10.3 - 11.4
60 (140)	7.1 - 8.0
80 (176)	3.5 - 4.0

Repair procedures

Inspection

1.	Turn the ignition switch OFF.

2.	Disconnect the ATS connector.

3.	Measure resistance between the ATS terminals 1 and 2.

Check that the resistance is within the specification.

Temperature [°C (°F)]	Resistance (kΩ)
-40 (-40)	841.2 - 1019.3
-20 (-4)	263.8 - 306.5
0 (32)	92.4 - 102.8
10 (50)	57.0 - 62.2
20 (68)	36.2 - 38.8
40 (104)	15.3 - 16.7
50 (122)	10.3 - 11.4
60 (140)	7.1 - 8.0
80 (176)	3.5 - 4.0

Removal

1.	Turn the ignition switch OFF and disconnect the battery negative (-) cable.

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

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

Installation

•	Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.

1.	Install in the reverse order of removal.

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