Hyundai i-30: 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. ECM receives not only the intake air temperatue but
also the ambient air temperature informations at the same time to control the
intake air quantity precisely provided through the turbo charger. The electrical
resistance of the thermistor decreases as the temperature increases, and increases
as the temperature decreases This sensor has a Negative Temperature Coefficient
(NTC) 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 [B1/S1].
|
4. |
Check that the resistance is within the specification.
Specification : Refer to "Specification"
|
|
1. |
Turn the ignition switch OFF and disconnect the battery negative (-)
cable.
|
2. |
Remove the engine room under cover.
(Refer to Engine Mechanical System - "Engine Room Under Cover")
|
3. |
Disconnect the ATS connector (A), and then removing the sensor (B).

|
•
|
Note that internal damage may occur when the component is dropped.
If the component has been dropped, inspect before installing.
|
|
1. |
Install in the reverse order of removal.
|
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1. Driver’s front air bag
2. Passenger’s front air bag
3. Side air bag*
4. Curtain air bag*
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