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What if the vehicle doesn't have a
VSS wire ?
Most pre-1980 vehicle have mechanical speed-
ometers and do not employ cruise control
systems. Therefore, these vehicles may not
have a VSS wire. Alpine speed pulse generator
NVE-K300 is separately sold. This will magnet-
ize the metal in the tire of the vehicle. The
magnetic field created is sensed as a pulse
during for each rotation of the tire. The number
of tire rotations is used to calculate the vehicle’s
speed. Not all vehicles can use this generator,
but it can be a solution for most of these vehi-
cles.
The Test Drive
The navigation system must be driven for about
10 to 15 minutes on actual roads for the map
matching process to accurately place the
vehicle in the correct position. Don’t worry if the
system has you driving in the wrong direction
on the map. Also note that the grey bar on the
bottom of the screen should display the current
street name within this time period. The more
you drive, the more the system will correct
itself. If the vehicle icon does not move
smoothly as you drive, or the street name does
not appear on the bottom of the screen, you
may not have the proper VSS wire. Double
check your connections and verify the VSS wire
once again.
Self Calibration
It is normal that the system may not exactly
follow the vehicle's path for about a day or so.
The system is learning the vehicle. It is calibrat-
ing the speed pulse and gyro and checking it
with the GPS. The more the vehicle is driven,
the more accurate the system becomes. This is
also true if the tire size is changed. The system
may be a little off for a day or so but it will
correct itself.
System Check
With the system on, please confirm the following
items for proper operation:
GPS reception: The GPS icon will be colored
blue when the system receives 3 satellites and
yellow when 4 or more satellites are received.
Illumination: When the parking lights are on the
screen should dim (the brightness can be
controlled through the setup mode).
Reverse: The vehicle will back up on the map
when the vehicle is in reverse and moving
backwards.
Speed pulse (VSS): Just drive, if the VSS is
correct, the vehicle will move with you and stop
when you stop.
