Honda 2004 Odyssey Service Manual page 2037

Navigation System
System Description (cont'd)
Navigation Function
The navigation system is composed of the navigation unit, the vehicle speed pulse (VSP) sensor, the GPS antenna,
and the display unit.
Function Diagram
GPS ANTENNA
Reception of radio
wave from satellite
VEHICLE SPEED
PULSE (VSP)
SENSOR
Detection of
travel distance
YAW RATE SENSOR
Vehicle Speed Pulse (VSP) Sensor
The vehicle speed pulse (VSP) sensor is driven by the differential gear ('00-01) or the PCM ('02-04). For every
revolution of the wheel, a four-pulse signal is sent to the navigation unit. The VSP outputs the distance signal by
turning the navigation unit's sensor power on and off.
VEHICLE SPEED
PULSE (VSP) SENSOR ('00-01)
PCM ('02-04)
22-358
GPS RECEIVER
Detection of
GPS tuning
vehicle position
Perception of
vehicle position
Detection of Correction of
direction change map matching
DVD-ROM
NAVIGATION UNIT
Data process
concerning map
and vehicle position
Map scroll
Change of reduced
scale of map
NAVIGATION UNIT
Sensor power
DISTANCE
DETECTION
CIRCUIT
DISPLAY UNIT
LCD
Guide
processing
Destination SWITCH