Automatic transmission selector position sensor Nissan Almera G15
Location:
* Located on the automatic transmission selector housing.
* Usually located on the right side of the selector lever.
Target:
* Determines the current position of the automatic transmission selector.
* Provides a signal to the transmission control unit (TCU), which then selects the appropriate gear.
Working principle:
* The sensor uses a potentiometer to measure the voltage generated depending on the position of the automatic transmission selector.
*Different selector positions correspond to different voltage levels.
* The TCU interprets these voltage signals to determine selector position.
Main types of automatic transmission selector position sensors:
* Contact sensor: Uses mechanical contact to detect selector position.
* Non-contact sensor: Uses magnetic or optical principle to detect selector position.
Symptoms of a faulty automatic transmission selector position sensor:
*Unable to change gears.
* The transmission does not engage properly.
* Errors or warnings in the transmission control unit.
Diagnostics:
* Visual inspection (check for damage to the housing or connectors).
*Measure voltage between sensor and TCU (follow manufacturer’s instructions).
* Scan trouble codes using a diagnostic scanner.
Replacement:
* Usually requires removing the automatic transmission selector to access the sensor.
* Install the new sensor and check that it works correctly.
* Reset TCU adaptations if applicable.