Impreza 2.5 RS Sedan AWD F4-2.5L SOHC (2002)
CONSTRUCTION
The speed sensor mainly consists of a Hall IC, magnet ring, driven shaft and spring.
OPERATION
As the driven key rotates, the magnet turns causing the magnetic field of the Hall IC to change. The Hall IC generates a signal that corresponds to a
change in the magnetic field.
One turn of the driven key in the speed sensor sends 4 pulses to the combination meter, engine control module and cruise control module.
