The cursor won track on the road correctly or appears on parallel streets?
If the Nav has been replaced or upgraded, it will require a ‘break in’ time for the ‘inertia’ system to learn the characteristics of the new driver. Each different user of the system (vehicle driver), should select a different USER No. at the start menu. Different driver using the same USER No. may cause the system to erase previous inertia learning data depending on driving patterns, causing the unit to start relearning driving characteristics all over again. This is referred to as the ‘learn count’ (Diagnostics/Sensor Status). Bias LC < 20, Orientation LC < 50.