Charging System Alternator Tests - Polaris 2013 RANGER RZR S Service Manual

Charging System Alternator Tests

Three tests can be performed using a multi-meter to
determine the condition of the stator (alternator).
Y1
Y2
Stator / Regulator connector
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: 0.11 ± 15%
Connect Meter
Test
Leads To:
Battery Charge Coil Y1 to Y2
Battery Charge Coil Y1 to Y3
Battery Charge Coil Y2 to Y3
NOTE: 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
1. Measure the resistance value of each of the stator
legs to ground: Y1 to Ground, Y2 to Ground, Y3 to
Ground. Each test should measure: Open Line (OL)
Connect Meter
Test
Leads To:
Y1, Y2, or Y3
Battery Charge Coil
to Ground
NOTE: Any measurement other than Infinity (open)
will indicate a failed or shorted stator leg.
Y3
Perform tests at
Ohms Reading
0.11 ± 15%
0.11 ± 15%
0.11 ± 15%
Ohms Reading
Open Line
(Infinity)
9924125 - 2013 RANGER RZR / RZR S / RZR 4 Service Manual
© Copyright 2012 Polaris Sales Inc.
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 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).
4. Refer to the following table for approximate AC
Voltage readings according to RPM. Test each leg at
the specified RPM in the table.

Example: The alternator current output reading
should be approximately 18 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
ELECTRICAL
AC Voltage (VAC) Reading
18 VAC ± 25 %
42 VAC ± 25 %
64 VAC ± 25 %
10.29
10