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Home >> Nissan-Datsun >> 2009 >> Altima Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 44 (Audio System, Visual System, Navigation System (Hybrid)) >> BOSE Audio With Navigation >> Function Diagnosis >> Navigation System >> System Description >> Travel Direction
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Travel Direction

WARNING: This page is about a different variant/trim than selected.

Change in the travel direction of the vehicle is calculated by a gyroscope (angular velocity sensor) and a GPS antenna (GPS information). As the gyroscope and GPS antenna have both merit and demerit, input signals from them are prioritized in each situation. However, this order of priority may change in accordance with more detailed travel conditions so that the travel direction is detected more accurately.

ADVANTAGE AND DISADVANTAGE

Type Advantage Disadvantage
Gyroscope (angular velocity sensor)
  • Can detect the vehicle's turning angle quite accurately.
  • Direction errors may accumulate when the vehicle is driven for long distances without stopping.
GPS antenna (GPS information)
  • Can detect the vehicle's travel direction (North/South/East/West).
  • Correct direction cannot be detected when the vehicle speed is low.