Automatic transmission speed sensor Toyota Estima
The automatic transmission (automatic transmission) speed sensor transmits information about the speed of rotation of the automatic transmission input shaft to the electronic control unit (ECU) of the automatic transmission. This information is used by the ECU to determine the current gear and adjust gear shifting.
Location of automatic transmission speed sensor
On Toyota Estima, the automatic transmission speed sensor is usually located next to the automatic transmission housing. It can be secured with bolts or latches.
Types of automatic transmission speed sensors
Several types of automatic transmission speed sensors can be used on Toyota Estima cars:
* Inductive sensors: Read changes in the magnetic field created by the gear on the input shaft of the automatic transmission.
* Optical sensors: Read interruptions in the light beam created by the disc on the input shaft of the automatic transmission.
Symptoms of a faulty automatic transmission speed sensor
A faulty automatic transmission speed sensor can lead to the following symptoms:
* Incorrect gear shifts
* Jerks or slipping when changing gears
* Check Engine Light Illuminated
* Errors in the engine control system
Diagnosis of automatic transmission speed sensor malfunction
A faulty automatic transmission speed sensor can be diagnosed using:
* Read fault codes
* Sensor resistance checks
*Checking the sensor output using an oscilloscope
Replacing the automatic transmission speed sensor
Replacing an automatic transmission speed sensor usually requires the following steps:
* Drain automatic transmission fluid
* Disconnect the electrical connector of the sensor
* Unscrew the bolts or latches securing the sensor
* Remove the old sensor
* Install a new sensor
* Connect the electrical connector
* Fill automatic transmission fluid