Toyota Sequoia (2005). Manual — part 612
![](/vehicles/linovind/vere/fry/anshore.png)
I28261
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DIAGNOSTICS
NAVIGATION SYSTEM
DI–2243
2437
3
Navigation check mode (Vehicle sensors check).
PREPARATION:
Enter the ”Navigation Check” mode (Vehicle Sensors) (See
page
CHECK:
While driving, compare the ”SPD” indicator to the reading on the
speedometer. Check if these readings are almost the same.
OK:
The readings are almost the same.
NG
Go to ”speed signal circuit” in flow chart
(See page
OK
Proceed to next circuit inspection shown in problem symptoms table (See page
![](/vehicles/linovind/vere/fry/mucrend.png)
I28263
I28258
DI–2244
–
DIAGNOSTICS
NAVIGATION SYSTEM
2438
Current position display does not appear
INSPECTION PROCEDURE
1
Check radio and navigation assy.
CHECK:
Check if a map disc is inserted in the map disc slot.
OK:
A map disc is inserted.
NG
Insert map disc in ”MAP” side slot.
OK
2
Check map disc.
CHECK:
Check that the map disc is not deformed or cracked.
OK:
No deformations or cracks appear on the map disc.
NG
Replace map disc.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page
DIDD0–01
![](/vehicles/linovind/vere/fry/guntar.png)
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DIAGNOSTICS
NAVIGATION SYSTEM
DI–2245
2439
GPS mark is not displayed
INSPECTION PROCEDURE
1
Check cabin.
CHECK:
Check the cabin for any object that might interrupt radio reception on the instrument panel. If such an object
exists, remove it and check if the GPS mark reappears.
HINT:
GPS works using extremely weak radio waves originating from satellites. If the signal is interrupted by ob-
structions or another radio wave, the GPS system may not be able to properly receive the signal.
OK:
Mark appears.
OK
Normal operation.
NG
2
Check surroundings.
CHECK:
Check if the vehicle is in a location where GPS signal reception is bad. If the vehicle is in such a place, move
it elsewhere and check if the GPS mark reappears.
HINT:
GPS uses 24 satellites in 6 orbits so that at any time 4 satellites will be in line–of–sight of your vehicle.
GPS signals may not be received, however, based on surroundings, vehicle direction, and time.
DIDD1–01
![](/vehicles/linovind/vere/fry/eris.png)
I28264
In a tunnel
In a building
Under an overpass
Forest or tree–lined path
Between tall buildings
Under a cliff, overhang
DI–2246
–
DIAGNOSTICS
NAVIGATION SYSTEM
2440
The following illustrations show some conditions where it may be difficult to receive GPS signals.
OK:
GPS mark is displayed.
OK
Returns to normal.
NG
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