10
9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
10.79
STATOR TESTING
CHARGE COIL
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
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:
TEST
CONNECT
METER LEADS
TO:
OHMS
READING
Battery Charge
Coil
Y1 to Y2
< 1 Ω
Battery Charge
Coil
Y1 to Y3
< 1 Ω
Battery Charge
Coil
Y2 to Y3
< 1 Ω
NOTICE
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
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:
TEST
CONNECT
METER LEADS
TO:
OHMS
READING
+/- 15% @ 68° F
(20° C)
Battery Charge
Coil
Y1, Y2, or Y3 to
Ground
Open Line
(Infinity)
NOTICE
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 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.
RPM READING
AC VOLTAGE (VAC)
READING
1300 24 VAC ± 25%
3000 50 VAC ± 25%
5000 82 VAC ± 25%
CRANKSHAFT POSITION SENSOR #1
The following test can be performed using a multi-meter
to determine the condition of the crankshaft position
sensor.
TEST: RESISTANCE VALUE OF CRANKSHAFT
POSITION SENSOR #1
TEST
CONNECT
METER LEADS
TO:
OHMS
READING
+/- 15% @ 68° F
(20° C)
Crankshaft
Position Sensor
#1
White to White /
Red
190Ω
NOTICE
A measurement of Infinity (open) will indicate a failed or
shorted CPS.
CRANKSHAFT POSITION SENSOR #2
The following test can be performed using a multi-meter
to determine the condition of the crankshaft position
sensor.
TEST: RESISTANCE VALUE OF CRANKSHAFT
POSITION SENSOR #2
TEST
CONNECT
METER LEADS
TO:
OHMS
READING
+/- 15% @ 68° F
(20° C)
Crankshaft
Position Sensor
#2
Green to White /
Green
190Ω
NOTICE
A measurement of Infinity (open) will indicate a failed or
shorted CPS.
BATTERY / ELECTRICAL
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