Voltage Drop Test - Polaris 2009 Trail Boss 330 Service Manual

STARTER SYSTEM
TROUBLESHOOTING
Starter Motor Does Not Turn
GBattery discharged - low specific gravity
GLoose or faulty battery cables or corroded
connections (see Voltage Drop Tests)
GRelated wiring loose, disconnected, or
corroded
GPoor ground connections at battery cable,
starter motor or starter solenoid (see
Voltage Drop Tests)
GFaulty starter button
GFaulty ignition switch (Do other systems
function?)
GFaulty starter solenoid or starter motor.
GEngine problem - seized or binding (Can
engine be rotated easily with recoil
starter?)
Starter Motor Turns Over Slowly
GBattery discharged - low specific gravity
GExcessive circuit
connections (see Voltage Drop Test
below)
GEngine problem - seized or binding (Can
engine be rotated easily with recoil
starter?)
GFaulty or worn brushes in starter motor
GAutomatic compression release inoperative
Starter Motor Turns - Engine Does Not Rotate
GFaulty starter drive
GFaulty starter drive gears or starter motor
gear
GFaulty flywheel gear or loose flywheel
resistance - poor

VOLTAGE DROP TEST

The Voltage Drop Test is used to test for bad
connections. When performing the test, you are
testing the amount of voltage drop through the
connection. A poor or corroded connection will
appear as a high voltage reading. Voltage shown on
the meter when testing connections should not
exceed .1 VDC per connection or component.
To perform the test, place the meter on DC volts and
place the meter leads across the connection to be
tested. Refer to the chart on next page to perform
voltage drop tests on the starter system.
Voltage should not exceed:
1 DC volts per connection
STARTER LOCKOUT
TROUBLESHOOTING
The starter lockout is controlled by the PDM. Pin 'G'
of the PDM senses the transmission signal and
determines if the switch is in Neutral or Park. When
the conditions are met, the PDM will activate Pin 'A' to
ground the starter solenoid. Pin 'B' of the PDM senses
when the brake is applied. The PDM will allow starting
in Neutral or Park without the brake applied. Applying
the brake overrides this system and allows starting
regardless of transmission shift position.
Items to check when diagnosing a no--start condition
are:
GTransmission switch for proper function
GStarter solenoid for proper function
GBrake switch for proper function
GWire harness, loose connections/pins
(including the PDM) leading to and
from these components
GProper ground to frame
Should all these items be found in working order, the
PDM may be at fault.
ELECTRICAL
10.29