A
Overview of Operation
The Polaris Electronic ATV speedometer is powered
by battery voltage (12 VDC) and requires engine
RPM, transmission gear, and wheel speed sensor
input signals for proper operation. Wiring to the
speedometer head consists of a three-pin connector
from the wheel speed sensor and a six-pin connector
from the main A TV wiring harness.
A non-s erv iceable internal memory batt ery main-
tains odom et er and hour m et er dat a whenthema-
chine is not running.
The illumination lamp inside the gauge is non-ser-
viceable and is designed to last for the life of the unit.
In addition to the ground speed in Miles Per Hour
(MPH)orKilometersPerHour(KPH),odometer,and
trip odometer, the electronic speedometer provides
the following functions:
S Records Engine Run Time in Hours
S Reverse Speed Limit
S Prevents A WD engagement: When engine RPM
is too high
Vehicle Speed and
Odometer
An electronic wheel speed sensor located on the
right front brake caliper bracket senses vehicle
speed. The sensor “reads” notches in the rotating
brake rotor (disc) and sends a signal through the
three-pinharness pinB. Thewheelspeedsensorre-
ceives approximately 10 VDC power from the
speedometer head and does not differentiate be-
tween forward and reverse wheel rotation. LED Test
Light PN 2871745, with 2460761 probe kit, can be
used to quickly test the sensor .
Engine Run Time Hour
Meter
If the engine is running, the hour meter is recording
the run time. The hour meter logs hours when the
speedometer is powered up. The engine does not
have to be running.
Reverse Speed
Limit
Thetransmissiongearsignalissenttothespeedom-
eter onpinF.Theoperatingspeedof theATVislimit-
ed when the transmission is shifted into reverse
gear. The ignition spark to the engine is turned off if
the ground speed exceeds 7 to 9 MPH in reverse
gear. Ignition spark returns when the vehicle speed
drops below 7 MPH in reverse without override but-
ton pushed.
NOTE: If the speedometer does not detect a wheel
speed sensor (motion of the front wheel) it will limit
RPM to approximately 3600 in reverse.
High RPM AWD Hub Engagement
Disable
Theelectronic speedometer preventsAWDengage-
ment athighRPM. If engineRPMisabove3000,the
ground connection for the AWD wheel coils and
AWD indicator lamp (Pin E) is not supplied by the
speedometer .
The engine RPM signal is sent to the speedometer
onPinD(typically theyellow/redwire).It isimportant
to note that a failed voltage regulator can prevent A WD
engagement.
Override
Button
The override button (on the left handlebar switch
block) interrupts the transmission gear signalallow-
ing AWD engagement in rever se as long as the
overr ide button is depressed.
Refer to the flowcharts and schematic diagrams to
troubleshoot the electronic speedometer .
INPUTS
Back of Speedometer
E
A
B
C
D
F
B
C
Reverse(top trans sw.)
D.C.
(trans sw.)
A: Battery Voltage - Red/W
B: Ground - Brown
C: Engine Stop - Black
D: Alternator - Y/R, A.C., RPM
E: AWD Hub Coil - Brn/W, Coil ground
F: Reverse Override - Gry/Or, Limits
A: D.C. Power
B: Signal
C: Ground
Engine Off Switch
ELECTRICAL
10.26
ELECTRONIC SPEEDOMETER TROUBLESHOOTING
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