Charging System Stator (Alternator) Tests - Polaris RZR 570 2013 Service Manual

CHARGING SYSTEM STATOR
(ALTERNATOR) TESTS
Three tests can be performed using a multi-meter to
determine the condition of the stator (alternator).
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
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
NOTE
If there are any significant variations in ohm readings
between the three legs it is an indication that one of the
stator legs may be weak or failed.
TEST 2: Resistance Value of Each Stator Leg to
Ground
2. Measure the resistance value of each of the stator
legs to ground: Y1 to Ground, Y2 to Ground, Y3 to
Ground.
9926813 R04 - 2013-2016 RZR 570 Service Manual
© Copyright Polaris Industries Inc.
3. Each test should measure: Open Line (OL)
TEST
Battery Charge
Coil
Any measurement other than Infinity (open) will indicate
TEST 3: Measure AC Voltage Output of Each
Stator Leg at Charging RPM
4. Set the selector dial to measure AC Voltage.
5. Start the engine and let it idle.
6. 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).
7. Refer to the following table for approximate AC
Voltage readings according to RPM. Test each leg at
the specified RPM in the table.
OHMS
READING
8. Example: The alternator current output reading
should be approximately 21 VAC at 1300 RPM
between each 'leg'.
0.15 Ω ± 20%
0.15 Ω ± 20%
If one or more of the stator leg output AC voltage varies
significantly from the specified value, the stator may
0.15 Ω ± 20%
RPM READING
1300
3000
5000
ELECTRICAL
CONNECT
OHMS
METER
READING
LEADS TO:
Y1, Y2, or Y3
Open Line (∞)
to Ground
NOTE
a failed or shorted stator leg.
NOTE
need to be replaced.
AC VOLTAGE (VAC)
READING
21 VAC ± 25%
49 VAC ± 25%
80 VAC ± 25%
11
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