Honda 2007 Acura RL User Manual page 21

2005-08 ACCESSORIES AND EQUIPMENT Navigation System - RL
ROM drive, and interprets voice commands. With control of all these items, the navigation unit makes the
navigation picture signal, then it transmits the signal to the display panel control unit and audio driving
instructions to the audio unit.
Calculation of Vehicle Position
The navigation unit calculates the vehicle position (the driving direction and the current position) by
receiving the directional change signals from the yaw rate sensor and the travel distance signals from vehicle
speed pulse (VSP) signal of the PCM.
Map Matching Tuning
The map matching occurs when you drive the vehicle along a mapped road until the road name appears of
the bottom of the screen. The map data transmitted from the DVD-ROM is checked against the vehicle
position data, and the vehicle position is indicated on the nearest road. Map matching tuning does not occur
when the vehicle travels on a road not shown on the map, or when the vehicle position is far away from a
road on the map.
GPS Tuning
The GPS tuning is accomplished by indicating the vehicle position as the GPS's vehicle position. The
navigation unit compares its calculated vehicle position data with the GPS vehicle position data. If there is
large difference between the two, the indicated vehicle position is adjusted to the GPS vehicle position.
Distance Tuning
The distance tuning reduces the difference between the travel distance signal from the VSP and the distance
data on the map. The navigation unit compares its calculated vehicle position data with the GPS vehicle
position data. The navigation unit then decreases the tuning value when the vehicle position is always ahead
of the GPS vehicle position, and it increases the tuning value when the vehicle position is always behind the
GPS vehicle position.
Route Guidance
The navigation unit can calculate different routes to a selected destination. You have five options:
Direct Route-Calculate a route that is the most direct.

Easy Route calculate a route that minimizes the number of turns needed.

Minimize Freeways-Calculate a route that avoids freeway travel. If that is not possible, keep the

amount of freeway travel to a minimum.
Minimize Toll Roads-Calculate a route that avoids, or minimizes travel on toll roads.

Maximize Freeways-Calculate a route that uses freeways as much as possible.

Audio Guidance
The navigation unit transmits audio driving instructions before entering an intersection or passing a junction.
The audio instructions come through the audio unit to the front speakers.
NOTE: The front speakers are muted whenever the navigation system is giving
guidance commands, and all of the speakers are muted when the voice
2007 Acura RL