169000180 - N39 I.C.S. DETECTS INCORRECT POSITION

The navigation system detects an incorrect position: junctions detected sooner or later

The navigation system takes about 100km to self-regulate accurately from the first system start-up and when the tyres are changed for others of a different size. Under conditions or poor wheel grip (skidding on ice), the system temporarily detects an incorrect position

1	CHECK THE MAP CD	All OK	Problems encountered	Operation
	Check that the map CD is cleanCheck that the map CD is not scratchedCheck that the CD is compatible with the type of navigation systemCheck that the defect does not arise immediately after replacing the tyres	Move on to Step 2	Map CD dirty Map CD scratched CD does not correspond The defect occurred after replacing the tyres and is therefore due to an imprecise wheel rpm distance conversion factor	Clean the map CD using a clean cloth Replace the map CD Replace with a specific map CD Cover about 100 km under excellent satellite reception conditions in order to reset the conversion factor
2	SPEED SIGNAL CHECK	All OK	Problems encountered	Operation
	Check for a speed signal on Connect Vedere Prova 5580MH VERIFICA SEGNALE DI VELOCITA' DA QUADRO STRUMENTI A LETTORE MAPPE	Move on to Step 3	Speed signal interrupted	Restore the signal See E3510 RADIO
4	CHECK NAVIGATION SYSTEM OPERATION	All OK	Problems encountered	Operation
	Check the operation of the navigation system device    See Test 5580MH CHECKING THE SPEED SIGNAL FROM THE INSTRUMENT BOARD TO THE MAP READER	Move on to Step 5	Connect with navigation system defective: gyroscope jammed	Replace Connect