[ KB ] How to Install a Navigation System Defeat Switch

[efusco]

Originally Posted by windstrings

Ah yes.. I forgot about that.... the ability for it to count the revolutions of the wheels to make an accurate assessment of your location... as in a tunnel or other area where the satellites cannot see!

I haven't read much at all about the dead reckoning feature.

It also takes into account turns.

[windstrings]

yes, it looks like if you kill the sensor and then travel a mile down the road and turn it back on, the dead reckoning immediately takes over and if you immediately take a turn to the left or right the dead reckoning will follow you.
It may look like your driving out into a field or a lake because it still "thinks" you are a mile back where it last had you pinpointed. Then once satellite updates, it puts you in proper relation to your true area.

In other words, dead reckoning works great if it stays intact "by not turning off the switch" but is dependent upon satellite to update it, if there is a gap in the speed sensing.