Impreza RS Coupe AWD F4-2.5L SOHC (1999)
Transmission Speed Sensor: Description and Operation
SPEED SENSOR 2
The speed sensor 2 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.
1. CONSTRUCTION
The speed sensor 2 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.
