Automatic transmission engine speed sensor
This is a device that measures the engine speed in an automatic transmission (AT). It provides the vehicle’s Electronic Control Unit (ECU) with information about engine speed.
Functions of the automatic transmission engine speed sensor:
* Ensuring stable engine operation at idle
* Adjustment of automatic transmission gear shift timing
* Adjusting the ignition timing
* Diagnosis of engine faults
Types of automatic transmission engine speed sensors:
There are two main types of automatic transmission engine speed sensors:
* Inductive: Converts changes in the magnetic field created by a rotating gear into an electrical signal.
* Hall Effect: Identifies the position of teeth on a gear using a Hall effect sensor, generating a digital signal.
Location of the automatic transmission engine speed sensor:
The sensor is usually located near the gear on the crankshaft or flywheel of the engine. It can be installed inside or outside the transmission.
Signs of a faulty automatic transmission engine speed sensor:
* Unstable engine speed at idle
*Long or missed gear shifts
* Deteriorating fuel economy
* Difficulty starting or stopping the engine
*Check Engine Light (CEL) Illuminated
Diagnostics and replacement of a faulty automatic transmission engine speed sensor:
To diagnose a faulty automatic transmission engine speed sensor, you can use a fault code scanner (OBD2). If the code indicates a problem with the sensor, it should be replaced. Sensor replacement should usually be performed by a qualified mechanic.