7.24
9924864 - 2012-2014 SPORTSMAN 800 / 6X6
© Copyright 2013 Polaris Sales Inc.
ADC Operation
Engaging Front Gearcase: Active Descent Control
(ADC) is controlled by the ECU and will not enable until
the following conditions are met:
• Vehicle speed is below 15 Mph (24Kph)
• Throttle Position Sensor (TPS) is at idle position
• The AWD switch is switched to ‘AWD/ADC’
Once the conditions are met for engagement, ADC
remains engaged as long as the conditions are met.
With the AWD switch set to ‘2x4’, the vehicle drives only
the rear wheels (2 wheel drive). When the AWD switch is
set to ‘4x4’ the magnetic coils are active, the AWD coil
indexes the clutch mechanism so that both front axles
will engage when there is a loss of rear wheel traction. In
addition to the rear wheel engine braking, the ADC coil
provides front wheel engine braking at speeds less than
15 Mph (24Kph) with the TPS at idle position.
ADC Engagement: When the AWD switch is set to ‘4x4/
ADC’, a 12 Vdc current is present at the input shaft coil
(1). Operation is controlled by the ECU grounding and
ungrounding the coil. The coil’s magnetic field attracts a
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 shaft. The eccentric cam pushes on the
hydraulic piston/pump assembly (5). The pressure
created by the pump assembly forces hydraulic fluid
through passages to the piston assemblies (6) located in
each case half. Hydraulic pressure forces the piston
assemblies inward to compress the splined clutch packs
(7) forming a dynamic coupling to each front drive axle,
resulting in true all-wheel EBS operation upon
deceleration.
Disengagement: Current to the ADC coil is turned off by
the ECU anytime the following conditions are met:
• Throttle Position Sensor (TPS) moves off idle
position
• The AWD switch is switched to ‘4x4’ or ‘2x4’
• Vehicle speed is above 15 Mph (24Kph)
Hydraulic pressure stops and the pistons release,
disengaging the ADC function. The vehicle returns to
rear wheel drive until the next deceleration.
FINAL DRIVE
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