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26   Navigation Functions
NAV I
This chapter explains navigation function operations.
Basic Operation
Navigation 
Functions
What is Navigation?
Navigation is a system that measures the 
location of your car and guides you along the 
route to the set destination. Your car's location 
displayed on the map is measured with the 
“GPS” and “Map matching” functions.
GPS(Global Positioning 
System)
The system that uses GPS satellites to detect 
the location is called “GPS”. The radio signals 
from these GPS satellites are received and 
the location of one's own car is measured to 
within about 30 to 200 meters.
• Measuring your car's location takes about 2 
minutes in a location with a good view. The 
first time this product is used or it is used 
after a long while, it takes about 5 minutes to 
measure your car's location. • 
The GPS satellites are managed by the 
Department of Defense of the United States 
of America, which sometimes deliberately 
reduces the location precision. When that 
happens, the location of your car may not be 
displayed in the correct location.
Map Matching
“Map matching” is a function that compares 
the route tracking data for your car with the 
road configuration in the map data, estimates 
the road you are driving on, and displays this 
on the map.
CAUTION
• The map displayed for navigation and 
the traffic rule information were prepared 
based on various types of information 
when the map data was prepared, so 
they may differ from the actual roads 
and traffic regulations. Always follow the 
actual roads and obey the actual traffic 
regulations.
GPS Antenna
GPS antenna
The location of your car is measured by 
receiving weak radio signals from GPS 
satellites with the “GPS antenna”.
ADVICE
If the radio signals from the GPS satellite 
are blocked, the location of your car may 
not be displayed in the correct location, so 
observe the following rules.
• Do not paste a mirror type film or shade 
film that contains carbon onto the 
windshield.
•  Do not place anything on or near the 
GPS antenna.
•  Do not use a mobile phone, PHS, 
computer, etc. near the GPS antenna.  
         
        
        
     
        
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214   Other Settings
Items That Can Be Set
NOTE
• * are items that may not be displayed, depending on the supporting vehicle specifications.
•  Either “Keyless Entry System” or “Keyless Operation System” is displayed, depending on 
the vehicle equipment.
Keyless Entr y System
Item Settings content
Turn Signal Lights Answerback Sets the number of times the lights flash for locking and 
unlocking.
Horn Answerback at Remote Lock Sets the sound (from the horn) for locking.
Duration of  Horn Answerback Sets the duration of the sound (from the horn) for locking.
Multi Mode Keyless Entr y System
*Sets power window and door mirror operation.
Keyless Operation System
Item Settings content
Turn Signal Lights Answerback Sets the number of times the lights flash for locking and 
unlocking.
Horn Answerback at Remote Lock Sets the sound (from the horn) for locking.
Duration of  Horn Answerback  Sounds Sets the duration of the sound (from the horn) for locking.
Multi Mode Keyless Operation  System
*Sets power window and door mirror operation.
Keyless Operation Answerback  Beep
*Sets the beep sound for locking and unlocking.
Time for Remote Unlock Inactivation  after Locking
*Sets the duration you must wait after locking before unlocking 
again.  
         
        
        
     
        
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222   Troubleshooting
Navigation Functions
Symptoms CauseResponse
The navigation function does not start. No map card is inserted.Insert the map card.
→“Insert an SD Card”(P15)
The wrong SD card is inserted.Insert the special map card.
There is a problem with the radio signals from the 
GPS satellite. Please go on for a little while in the GPS receiving 
state.
The vehicle moved by ferry or the like.
The vehicle's direction was changed by a turntable in 
a parking garage or the like.
The speed learning level is low.
When this product is used for the first time, it takes a 
while to calculate the position of your car. Wait in a location with a good view for a while.
When this product has not been used for long time, it 
takes a while to calculate the position of your car.
A mirror type film or shade film that contains carbon is 
pasted onto the windshield near the GPS antenna.
Some other antenna is near the GPS antenna. Check the position of the GPS antenna 
(P26) and if 
another antenna may be the cause of the problem, 
move that other antenna.
There is something on the GPS antenna. Check the position of the GPS antenna 
(P26) and if 
something on the GPS antenna may be the cause of 
the problem, remove it.
Immediately after the ignition switch is turned to ACC 
or ON, some functions cannot be used immediately 
after the map screen is displayed because data is 
being read in. Please wait until the reading is completed.
Menu operation is not possible. Immediately after the ignition switch is turned to ACC 
or ON, some functions cannot be used immediately 
after the map screen is displayed because data is 
being read in.Please wait until the reading is completed.
There is no audio guidance. The audio guidance volume is “OFF”.Set the [Navi Voice/Others] “Guidance Voice Volume” to 
[1] to [7].
→“Navi Voice/Others”(P202)
RTT messages cannot be received. No RTT message has been received yet.Wait in a location with a good view for a while.