Awd Diagnosis - Polaris RZR 900 2015 Service Manual

FINAL DRIVE
CAUTION
Switching to AWD while the rear wheels are spinning
may cause severe drive shaft and gearcase damage.
Always switch to AWD while the rear wheels have
traction or are at rest.
With the AWD switch off, the vehicle drives through the
rear wheels only (2 wheel drive). When the AWD is
enabled, the front drive acts as an on-demand AWD
system. This means, the front drive will engage once the
rear wheels have lost traction, and will remain engaged
until the torque requirement goes away (i.e. rear wheels
regain traction).
AWD Engagement: When the AWD switch is activated,
the AWD coil is powered by a 12 Vdc input which creates
a magnetic field. This magnetic field attracts an armature
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plate that is keyed to the roll cage
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gear and roll cage are spinning (vehicle is moving),
the energized coil and armature plate will apply drag to
the roll cage that indexes the rollers inside the ring gear
to an engagement position. While in the engagement
position, the front drive will be in an "over-running"
condition (not engaged), until the rear wheels lose
traction. Once the rear wheels begin to lose traction, the
front drive will engage by coupling the output hubs
the ring gear via the rollers. The front drive will remain
engaged until the torque requirement goes away (i. e.
rear wheels regain traction).
AWD Disengagement: Once the rear wheels regain
traction, the front wheels will return to the "over-running"
condition. The vehicle is now back to rear wheel drive
until the next loss of rear wheel traction occurs.
Torsion Spring Operation: The torsion spring
as a return mechanism to help disengage the coupling of
the output hubs and ring gear by creating an "over-
running" condition for the rollers upon disengagement.
9926814 R08 -
7.24

AWD DIAGNOSIS

Symptom: AWD Will Not Engage
1. Check the gearcase coil resistance. To test the coil
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. When the ring
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to
2. Turn on ignition and AWD switches and place gear
3. If electrical tests are within specification, remove
t
acts
4. Inspect armature plate
2015-2016 RZR 900
resistance, measure between the power wire
w
and ground wire (BN/WH). Measurement should
be within specification.
Front Gearcase Coil Resistance:
21 - 27 Ω
selector in High or Low. Check for minimum battery
voltage at Gray and Brown/White chassis wires that
power the coil. Should have a minimum of 11 Vdc.
gearcase (see Chapter 7 – Front Gearcase
Removal, page ) and inspect components.
pattern. There should be two distinct wear bands
If only one band of wear is present (or if there is wear
between the two bands), inspect the coil area as
indicated in Step 5. A wear band with an interrupted
wear mark may indicate a warped plate, which may
cause intermittent operation.
q
(GY)
e
for a consistent wear
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2016 RZR S 1000 Service
Manual
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.