Polaris A07MH46AA Offroad Vehicle User Manual


 
10.44
ELECTRICAL
STARTER SYSTEM
Troubleshooting
Starter Motor Does Not Run
Battery discharged. Low specific gravity
Loose or faulty battery cables or corroded connections
(see Voltage Drop Tests)
Related wiring loose, disconnected, or corroded
Poor ground connections at battery cable, starter motor
or starter solenoid (see Voltage Drop Tests)
Faulty key switch
Faulty kill switch
Faulty starter solenoid or starter motor.
Engine problem - seized or binding (Can engine be
rotated easily with recoil starter?)
Starter lockout malfunction
Starter Motor Turns Over Slowly
Battery discharged - low specific gravity
Excessive circuit resistance - poor connections (see
Voltage Drop Test below)
Engine problem - seized or binding (Can engine be
rotated easily?)
Faulty or worn brushes in starter motor
Starter Motor Turns - Engine Does Not Rotate
Faulty starter drive
Faulty starter drive gears or starter motor gear
Faulty flywheel gear or loose flywheel
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 1.47 to perform voltage drop tests on the starter system.
Starter Lockout Troubleshooting- EFI
Models
The starter lockout is controlled by the PDM. Pin 'C' on SSCB
#1 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 SSCB #2 Pin 'N' to ground the starter
solenoid.
Pin 'G' on SSCB #2 of the PDM senses when the brake is applied
and activates SSCB #2 pin ‘N’ to ground the solenoid. 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:
Transmission switch for proper function
Starter solenoid for proper function
Brake switch for proper function
Wire harness, loose connections/pins (including the
PDM) leading to and from these components
Proper ground to frame
Should all these items be found in working order, the PDM may
be at fault.
Starter Lockout Troubleshooting-
Sportsman 450
The starter lockout is controlled by the PDM. Pin 'G' on SSCB
#1 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 'H' on SSCB #1 of the PDM senses when the brake is applied
and activates pin ‘A’ to ground the starter solenoid. 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:
Transmission switch for proper function
Starter solenoid for proper function
Brake switch for proper function
Wire harness, loose connections/pins (including the
PDM) leading to and from these components
Proper ground to frame
Should all these items be found in working order, the PDM may
be at fault.
Voltage should not exceed
.1 DC volts per connection