Hyundai Sonata: Engine Control System / Ambient Temperature Sensor (ATS) Repair procedures

Inspection
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"

Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Remove the under cover front pannel.
(Refer to Engine Mechanical System - "Engine and Transaxle Assembly")
3.
Disconnect the connector, an then remove the ambient temperature sensor (A).

Installation
   
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.
Ambient Temperature Sensor (ATS) Schematic Diagrams
Circuit Diagram ...

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Other information:

Hyundai Sonata LF 2014-2019 Owners Manual: Malfunction Indicator Lamp (MIL)
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