Structure/Function; Compass; Automatic Clock Adjustment - Honda Fourtrax Rancher AT 2004 Service Manual

TECHNICAL FEATURE
STRUCTURE/FUNCTION
The GPS for the TRX400FGA consists of the combination meter and the GPS receiver.
The GPS receiver continuously computes the latitude and longitude and transfers the positioning data to the combination
meter. The combination meter recognizes the exact current vehicle position, and indica tes the travel direction and the
direction to the waypoint.
If the GPS receiver can not track more than three satellites, the GPS can not measure for the proper position and the navi-
gation system and compass
will
nOI function property.
The GPS receiver continuously repeats calculation of the latitude and longitude when the ignition switch is in the ON posi.
l oion. As a result, the start-up time of the positioning alter the ignition switch is turned to the ON position varies depend-
ing on when the ignition switch was turned to the OFF position, if the battery was removed and the distance the vehicle
was transported with the ignition switch in the OFF position. There are three different times as follows;
• Hot start
When turning the ignition switch ON within 2 hours from turning OFF, the position fix will complete in about 25 sec-
onds.
• Warm start
When turning the ignition switch ON over 2 hours after turning OFF, the position fix will complete in about 2 minutes.
• Cold start
The position fix will complete within about
8
minutes after the following situations;
- When turning the ignition switch ON over 1 month after turning OFF
- When transporting the vehicle with the ignition switch OFF for over 100 km
- When the battery is disconnected
If the combination meter det ects the communication error wit h the GPS receiver, - GPS" indicator will blink and all indica-
tions related GPS will light off.
NAVIGATION SYSTEM
This system indicates the direction toward the waypoint and direct-path distance.
COMPASS
The compass indicates the vehicle heading. As the direction of travel is calculated by using the previous and present posi-
tioning data, the ignition switch must be turned ON position and the vehicle must be moving at least 1 mph for the com-
pass to function.
AUTOMATIC CLOCK ADJUSTMENT
The digital clock in the TRX400FGA combination meter has a function of automatic adjustment when satellite status is
30
Navigation .
In the state of GPS time acquisition, the digital clock of display will be adjusted by adjusting the last digit of minute on the
basic of UT (Universal Time, formerly referred to as Greenwich Mean Time).
The automatic clock adjustment mechanism works only when the correction range extends
i 5
minutes, and the adjust-
ment mechanism will not work when the range exceeds
5
minutes or when the vehicle moves across the time difference
zone.
A
N
I
I
I
WP +1-1
a
2-3