Subaru LEGACY 2002 Quick Reference Index page 498

HVAC System (Heater, Ventilator and A/C)
4. MAGNET CLUTCH
The magnet clutch serve to transmit engine power to the compressor module. It is built into the
compressor shaft. When current flow through the magnet clutch coil, the drive plate is attracted so
that the pulley and compressor shaft rotate as a module. When the compressor is not in use, the
pulley alone rotates freely.
The compressor used with the six-cylinder engine has a lock sensor. If the sensor detects locking
of the compressor resulting from a fault, it causes disengagement of the magnet clutch to protect
the engine and the power steering drive.
(1) Bearing
(2) Magnet clutch coil
(3) Compressor
COMPRESSOR
(4) Drive shaft
(5) Clutch pulley
(6) Drive plate
AC-26
B4H0169B