What is an automatic transmission neutral switch?
The automatic transmission neutral switch is a device that tells the engine control module (ECM) when the transmission is in neutral.
Functions of the automatic transmission neutral position switch:
* Engine Starting: The ECM will not allow the engine to start if the transmission is not in neutral or park.
* Shift Interlock: The ECM will not allow shifting unless the transmission is in neutral.
* Traction control control: The ECM uses transmission position information to adjust the traction control system, which helps prevent wheel spin.
* Fuel Saving: The ECM can disable the idle control system when the transmission is in neutral to save fuel.
Automatic transmission neutral position switch device:
The automatic transmission neutral switch is usually a small electrical device mounted on the transmission housing. It has two or more contacts that operate when the transmission is in neutral.
Location of the automatic transmission neutral position switch:
The location of the automatic transmission neutral switch may vary depending on the make and model of the vehicle. In most cases it is located on the side or bottom of the transmission housing.
Malfunctions of the automatic transmission neutral position switch:
* Engine Won’t Start: If the neutral switch is not working, the ECM will not allow the engine to start.
*Transmission Shift Problems: If the neutral switch is faulty, the ECM may allow gear shifts when the transmission is not in neutral, which could result in transmission damage.
* Traction Control System Malfunctions: A faulty neutral switch may cause the traction control system to not operate properly.
* Increased fuel consumption: A faulty neutral switch may cause the ECM to not disengage the idle system when the transmission is in neutral, resulting in increased fuel consumption.
Replacing the automatic transmission neutral position switch:
If you suspect that the automatic transmission neutral position switch is faulty, it must be replaced. To do this, you will need to raise the car and remove the lower part of the transmission housing. Replacement should be performed by a qualified mechanic.