Hyundai Elantra (CN7): Engine Control System / Ambient Temperature Sensor (ATS)
Description and operation
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
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
| 1. | Turn the ignition switch OFF. |
| 2. | Disconnect the ATS connector. |
| 3. | Measure resistance between the ATS terminals 1 and 2. |
| 4. | 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
|
|
| 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). 
|
| •
| 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. |
Description and operation
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Description and operation
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Other information:
Components and components location
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Repair procedures
Replacement1.If the compressor is marginally operable, run the engine at idle speed, and let the air conditioning work for a few minutes, then shut the engine off.
Description and operation
DescriptionThe evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator from freezing by excessive cooling. The evaporator temperature sensor has the Negative Temperature Coefficient (NTC).
