Subaru LEGACY 2002 Quick Reference Index page 384

ABS
D: ABS SENSORS
Each of the ABS sensors detects the speed of the corresponding wheel. The sensor consists of a
permanent magnet, coil and tone wheel. The magnetic flux produced by the permanent magnet
changes as each tooth of the tone wheel (which rotates together with the wheel) passes in front
of the magnet's pole piece. The changing magnetic flux induces voltages at a frequency corre-
sponding to the wheel speed.
(1) Sensor body
(2) Pole piece
(3) Tone wheel
ANTI-LOCK BRAKE SYSTEM (ABS)
(1)
(2)
(3)
ABS-6
(4)
(6)
(5)
(4) Full speed
(5) Low speed
(6) Permanent magnet
(3)
(2)
B4H2197C