What is the function of a navigation protocol box?

1 Answers
CooperAnn
07/29/25 4:19pm
Navigation protocol box enables communication between the vehicle computer and navigation system. Installing a car navigation requires a matching protocol box, otherwise issues like inability to power on/off may occur. On many high-end vehicles, it decodes original functions like AC display and door opening information, ensuring navigation installation won't affect other vehicle features. When selecting navigation, product stability must be considered. During operation, vehicles may encounter bumps, high temperatures, electromagnetic interference, and poor cabin environments that could impact GPS performance - thus stability requirements are essential.
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