What is an automatic transmission selector sensor?
The automatic transmission (automatic transmission) selector sensor is a transmission component that detects the position of the gear shift lever. This information is used to control vehicle functions such as starting the engine, reversing, etc.
Where is the automatic transmission selector sensor located in the Hyundai Elantra?
Depending on the year of manufacture and model of the Hyundai Elantra, the automatic transmission selector sensor can be located in different places:
* Before 2011: Located under the gearshift lever in the center console.
* From 2011: Integrated into the Transmission Control Module (TCM), which is located under the hood.
How does the automatic transmission selector sensor work?
The automatic transmission selector sensor usually uses resistive position indicators. When the position of the gear shift lever changes, the resistance changes. The TCM uses this change in resistance to determine the position of the shift lever.
Signs of a faulty automatic transmission selector sensor
* Difficulty shifting gears: The vehicle may shift more slowly from one gear to another or may not shift at all.
* False shift lever position readings: The instrument panel may display an incorrect shift lever position (for example, “N” when shifting into “D”).
* Engine starting problems: The engine may not start when the gear shift lever is not in the “P” or “N” position.
* Engaging reverse gear: The vehicle may not engage reverse gear when the gear shift lever is moved to the “R” position.
Diagnostics and replacement of the automatic transmission selector sensor
Diagnosis of a faulty automatic transmission selector sensor includes inspection, circuit integrity testing and reading fault codes. Automatic transmission shift sensor replacement is usually performed by a qualified mechanic and may require removal of the center console or transmission control module, depending on the vehicle model.