Gps Receiver Troubleshooting - Polaris Sportsman 850 Service Manual

ELECTRICAL

GPS RECEIVER TROUBLESHOOTING

Satellite / GPS Receiver Terminology:
DOP: Dilution of Precision (Position / Time Accuracy)
HDOP: Horizontal Dilution of Precision
VDOP: Vertical Dilution of Precision
TDOP: Time Dilution of Precision
PIDD Satellite Status Display
1. Move the ATV to an outside area with a clear view of
the sky.
2. Start the engine and allow the PIDD to boot.
3. From the main screen access the GPS Manger Menu
and then Satellite Status.
Over a period of a few seconds, the satellite status
screen should be begin to acquire satellite signals and
resemble the screen shot below.
Typically, the rider will see more than 4 satellites and
DOP numbers less than 2.
GPS Receiver Not Communicating with the PIDD
The HDOP, VDOP, and TDOP fields will be grayed out
and there will be no position data. When this occurs, the
GPS receiver is either not receiving power, missing CAN
communications, or the receiver is faulty.
11.44
NOTE
Test the GPS Receiver Power Connector to identify why
the receiver is not turning on. If the power connector
passes inspection, install a new receiver and re-test.
No Satellite Reception (DOP Values All Zeros)
CAN communication link between receiver and PIDD is
functional but receiver has not yet acquired satellites.
This is normal during the first 30 to 90 seconds after
power up if the GPS has been off for several days. If the
receiver has been off for just a few hours the signal
should be acquired in a few seconds. If satellites are not
acquired after several minutes, check for clear view of
the sky or interfering electrical devices near the receiver.
If the DOP values all remain at zero, replace the receiver
with a new part and re-test.
Poor Satellite Reception
If the number of satellites is greater than zero then the
receiver has acquired a signal from each satellite listed
but either has not calculated a position or the position is
not very accurate.
A HDOP number of 100 and no LAT / LON indicates no
position has been calculated. If a valid LAT / LON
number is indicated but the HDOP number is still high
(>5) that indicates the position is not very accurate. The
position at rest in the map screen will jump around. This
could be due to poor visibility of the sky, electrical
interference or a faulty receiver.