5-16
2. Pull the recoil starter rope briskly. Meter reading
must be 19.2-23.5V.
INJECTION COIL
1. Test between the two blue/white leads in the four-
prong connector harness from the magneto.
2. Pull the recoil starter rope briskly. Meter reading
must be 15.3-18.7V.
CHARGE COIL (1)
1. Test between the black/red and green/red wires in the
triple-plug connector from the magneto.
2. Pull the recoil starter rope briskly. Meter reading
must be 30.2-36.9V.
CHARGE COIL (2)
1. Test between the brown/white and green/red wires in
the triple-plug connector from the magneto.
2. Pull the recoil starter rope briskly. Meter reading
must be 32.0-39.1V.
IGNITION TIMING SENSOR
(1 and 2)
1. Test between the green/white and brown/green wires
in the connector from the sensors.
2. Pull the recoil starter rope briskly. Meter reading
must be 4.3V (1) or 4.4V (2).
PRIMARY COIL (MAG/PTO)
1. Connect the red meter lead to the orange/red wire
(MAG) or to the white/red wire (PTO); then connect
the black meter lead to the orange/black wire (MAG)
or to the white/black wire (PTO).
2. Pull the recoil starter rope briskly. Meter reading
must be 172-233V.
LIGHTING COIL
1. Connect the red meter lead to one yellow wire; then
connect the black meter lead to another yellow wire.
2. Pull the recoil starter rope briskly. Meter reading
must be 5.4-5.8V.
LIGHTING COIL (
@
2000 RPM)
1. Attach the red maxiclip to the yellow lead; then
attach the black maxiclip to the brown lead.
2. Connect the red meter lead to the red maxiclip; then
connect the black meter lead to the black maxiclip.
3. With the rear of the snowmobile on a shielded safety
stand, run the engine at 2000 RPM.
4. Meter reading must be 14.8-22.2V.
Testing Low-Oil Light
Sensor
The low-oil light sensor is a magnetic switch. Its opera-
tion is based on a magnet located around the inside diam-
eter of a 1/2-in. hole in a plastic float. The switch located
in the stem of the sending unit is positioned through the
hole in the float. When the float drops to the lower part of
the stem, the magnet closes the electrical contacts
(located in the stem) allowing the current to pass on to
the warning light.
If the sensor should fail, it must be replaced. To test the
sensor, use the following procedure.
1. Remove the sensor from the oil reservoir by twisting
and pulling upwards. Wipe excess oil from the sensor.
2. Unplug the sensor from the wiring harness.
3. Set the meter selector to the OHMS position.
4. Touch each of the meter leads to one of the two wires
coming from the sensor. With the sensor in its nor-
mal position (float end down), the meter should read
resistance.
5. If the meter reads no resistance, check to make sure
good contact has been made with each of the wires
coming from the sensor. If the meter still reads no
resistance, replace the sensor.
6. While maintaining contact between the meter leads
and the sensor, raise the float. The meter must read
no resistance. If the meter reads resistance, replace
the sensor.
7. If the sensor tested out satisfactory but the light
doesn’t illuminate with only a small amount of oil in
the reservoir, check the bulb.
8. If the bulb is in good condition, check for voltage at
the connection where the sensor plugs into the acces-
sory wiring harness. Using a multimeter set on the 50
ACV scale, start the engine and allow it to idle.
Touch the red lead of the voltmeter to the red wire in
the two-prong connector. Touch the black lead to the
black wire in the wiring harness. At idle, the meter
should read 5 to 6 volts (AC). If no voltage is present
but the lights on the snowmobile operate normally,
either check the wiring harness for a broken wire or
replace the harness.
Testing Coolant
Temperature Sensor
1. Disconnect the main wiring harness connector from
the temperature sensor.
2. Connect an ohmmeter between the sensor terminal
and any convenient chassis ground (or any brown
wire). The ohmmeter must read less than 20 ohms of
resistance with the coolant temperature more than
+230°F. The ohmmeter must read no resistance with
the coolant temperature less than +190°F.
Manual
Table of Contents
Summary of Contents for Sno Pro 120 2011
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