10.26
ELECTRICAL
9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 Polaris Sales Inc.
TEST 1: Resistance Value of Each Stator Leg
1. Measure the resistance value of each of the three
stator legs:
Y1 to Y2, Y1 to Y3, and Y2 to Y3. Each
should measure 0.19 W
± 15 %.
NOTE: If there are any significant variations in
oh
m's readings between the three legs; it is an
indication that one of the three stator legs maybe
weak or failed.
TEST 2: Resistance Value of Stator Leg to Ground
1. Measure the resistance value
of each of the stator
legs to ground: Y1 to Ground, Y2 to Ground, Y3 to
Ground.
NOTE: Any measurement other than Infinity (open)
will
indicate a failed or shorted stator leg.
TEST 3: Measure AC Voltage Output of Each Stator
Leg at
Charging RPM
1. Set the selector dial to measure AC Voltage.
2. Start the engine and let it idle.
3. While holding the ATV at a specified R
PM, separately
measure the voltage across each “leg” of the stator by
connecting the meter leads to the wires leading from
the alternator (Y1 to Y2, Y1 to Y3, Y2 to Y3).
4. Refer to the table below for approximate Voltage AC
r
eadings according to RPM. Test each leg at the
specified RPM in the table. Example: The alternator
voltage output reading should be no less than 30-40
Vac above 2000 RPM between each 'leg'.
NOTE: If one or more of the stator leg output AC
volta
ge varies significantly from the specified value,
the stator may need to be replaced.
T
EST
CONNECT METER
W
IRES TO:
R
EADING IN OHMS
Charge Coil Y1 to Y2
0.43 W
± 15%
Charge Coil Y1 to Y3
0.43 W
± 15%
Charge Coil Y2 to Y3
0.43
W ± 15%
Charge Coil
Y1, Y2, or Y3 to
Grou
nd
Open (Infinity)
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