Distance Tuning

The distance tuning reduces the difference between the travel distance signal from the VSP ('99 model) or PCM ('00-01 models) 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.