Charging System Stator (Alternator) Tests - Polaris RZR XP 1000 Service Manual

ELECTRICAL

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: 0.07 - 0.13 Ω
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.
11.32
OHMS
READING
0.07 - 0.13 Ω
0.07 - 0.13 Ω
0.07 - 0.13 Ω
9925724 R01 - 2014-2015 RZR XP 1000 / RZR XP4 1000 Service Manual
© Copyright 2014 Polaris Industries Inc.
3. Each test should measure: Open Line (OL)
CONNECT
TEST METER
LEADS TO:
Battery Charge Y1, Y2, or Y3
Coil 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
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.
8. Example: The alternator current output reading
should be approximately 21 VAC at 1300 RPM
between each 'leg'.
NOTE: If one or more of the stator leg output AC
voltage varies significantly from the specified
value, the stator may need to be replaced.
RPM READING
1300
3000
5000
OHMS
READING
Open Line
(Infinity)
AC VOLTAGE (VAC)
READING
21 VAC ± 25%
47 VAC ± 25%
79 VAC ± 25%