Honda 2004 Odyssey Service Manual page 2036

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Overview
The Honda Navigation System is a highly-sophisticated, hybrid locating system that uses satellites and a map
database to show you where you are and to help guide you to a desired destination.
The navigation system receives signals from the global positioning system (GPS), a network of 24 satellites in orbit
around the earth. By receiving signals from serveral of these satellites, the navigation system can determine the
latitude and longitude of the vehicle. In addition, signals from the system's yaw rate sensor and the vehicle speed
pulse (VSP) sensor enable the system to keep track of the vehicle's direction and speed of travel.
This hybrid system has advantages over a system that is either entirely self-contained or one that relies totally on the
GPS. For example, the self-contained portion of the system can keep track of vehicle position even when satellite
signals cannot be received, and the GPS can keep track of the vehicle position even when the vehicle is transported by
ferry.
The navigation system applies all this location, direction, and speed information to the maps and calculates a route to
the destination entered. As you drive to that destination, the system provides both visual and audio guidance.
System Diagram
DISPLAY UNIT
PICTURE/
COLOR
SIGNAL
YAW RATE
SENSOR
ILLUMINATION
SIGNAL
MUTE SIGNAL/
VOICE OUTPUT
DISPLAY BUS
(GA-NET II)
NAVIGATION UNIT
GPS
DVD-
ROM
RECEIVER
REVERSE
(BACK UP) SIGNAL
CLIMATE CONTROL
UNIT
AUDIO UNIT
VEHICLE SPEED PULSE
(VSP) SENSOR
GPS ANTENNA
CHARGING
SIGNAL
FRONT
SPEAKERS
(cont'd)
22-357

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