2009 Polaris Sportsman 850 XP EFI EPS Service Manual, Page 215Get this manual

2009 Polaris Sportsman 850 XP EFI EPS Service Manual, Page 215

FINAL DRIVE ADC Operation Engaging the Front Gearcase: Active Descent Control (ADC) is controlled by the ECU and will not
ADC", 12 Vdc current is present at the input shaft coil (1)Operation is controlled by the ECU grounding and ungrounding the
coilThe coil's magnetic field attracts splined armature plate (2) on the pinion (input) shaft (4)The energized splined armature
plate attracts the unsplined eccentric cam (3), which begins to turn with the input shaftThe eccentric cam drives hydraulic
pistonpump assembly (5)The pressure created by the pump assembly forces hydraulic fluid through passages to the piston assemblies
(6) located in each case halfHydraulic pressure forces the piston assemblies inward to compress the splined clutch packs
(7) forming dynamic coupling to each front drive axle, resulting in true all-wheel EBS operation upon decelerationDisengagement:
Current to the ADC coil is turned off by the ECU anytime the following conditions are met: Throttle Position Sensor (TPS)