Legacy Outback Ltd Sedan F4-2.5L SOHC (2000)
Transmission Speed Sensor: Description and Operation
The speed sensor is a Hall IC pick-up type revolution sensor. (MT model)
This sensor is installed on the transmission case and detects the transmission output gear rotation speed. 4 pulses are sent to speedometer per rotation of
speed sensor driven shaft. Vehicle speed sensor is installed on the transmission, and sends signal to the cruise control module (MT model).
1. CONSTRUCTION
The speed sensor consists of a Hall IC, magnet ring, driven shaft, spring, etc.
2. OPERATION
As the driven key rotates, the magnet turns to change the magnetic field of the Hall IC.
The Hall IC generates a signal corresponding to a change in the magnetic field.
One turn of the driven key in the speed sensor sends 4 pulses of square wave signal to the combination meter, engine control module and cruise
control module.
