Polaris RANGER ETX 2015 Owner's Manual page 552

ELECTRICAL
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.
2. Each test should measure: 0.15 Ω ± 20%
CONNECT
TEST METER
LEADS TO:
Battery Charge
Y1 to Y2
Coil
Battery Charge
Y1 to Y3
Coil
Battery Charge
Y2 to Y3
Coil
If there are any significant variations in ohm 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 Each Stator Leg to
Ground
3. Measure the resistance value of each of the stator
legs to ground: Y1 to Ground, Y2 to Ground, Y3 to
Ground.
4. Each test should measure: Open Line (OL)
CONNECT
TEST METER
LEADS TO:
Battery Charge Y1, Y2, or Y3
Coil to Ground
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
11.26
OHMS
READING
Less than 1 Ω
Less than 1 Ω
Less than 1 Ω
NOTE
OHMS
READING
Open Line
(Infinity)
NOTE
9926806 R03 - 2015 - 2016 RANGER ETX / 570 2-SEAT 2015 - 2016 RANGER 570 CREW Service Manual
5. Set the selector dial to measure AC Voltage.
6. Start the engine and let it idle.
7. While holding the engine at a specified RPM,
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).
8. Refer to the following table for approximate AC
Voltage readings according to RPM. Test each leg at
the specified RPM in the table.
9. Example: The alternator current output reading
should be approximately 18 VAC at 1300 RPM
between each 'leg'.
If one or more of the stator leg output AC voltage varies
significantly from the specified value, the stator may
need to be replaced.
AC VOLTAGE (VAC)
RPM READING
READING
1300 21 VAC ± 25 %
3000 49 VAC ± 25 %
5000 80 VAC ± 25 %
NOTE
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