Vehicle speed pulse

[Teru_jap.]

Car navigation system is installed in my 98Conti.

I look for the place of the vehicle speed pulse.
When it is only GPS, it is incorrect.

It is not mentioned in my Electrical & Vacuum Manual.
Panasonic and the FORD dealer do not understand it, too.

Please teach it.

[95ContiDriver]

Originally Posted by Teru_jap.

Car navigation system is installed in my 98Conti.

I look for the place of the vehicle speed pulse.
When it is only GPS, it is incorrect.

It is not mentioned in my Electrical & Vacuum Manual.
Panasonic and the FORD dealer do not understand it, too.

Please teach it.

The conti VSS signal comes from the anti lock brake module.

[pro-five-oh]

The FORD EVTM manual will have VSS signal coming to the gauge cluster, tap that wire to the gauges to get the Navigation working.

[Teru_jap.]

95Conti Driver,
It is so.
95-97conti VSS signal comes from the anti lock brake module.

However, 98-02conti does not have VSS signal.
Will it come out of VDM?

[Teru_jap.]

Originally Posted by pro-five-oh

The FORD EVTM manual will have VSS signal coming to the gauge cluster, tap that wire to the gauges to get the Navigation working.

pro-five-oh,

I read manual, but there is not wire of VSS signal.
Do you think that it is wire of "SPC communication network "?

[95ContiDriver]

Originally Posted by Teru_jap.

pro-five-oh,

I read manual, but there is not wire of VSS signal.
Do you think that it is wire of "SPC communication network "?

There is no VSS wire. The information is multiplexed on the SPC network, I don't think you can read it without a scantool. The cluster is part of the network and gets the signal. I've heard of placing an additional VSS type device on a rotating member for cars with no VSS signal.

[Teru_jap.]

Originally Posted by 95ContiDriver

There is no VSS wire. The information is multiplexed on the SPC network, I don't think you can read it without a scantool. The cluster is part of the network and gets the signal. I've heard of placing an additional VSS type device on a rotating member for cars with no VSS signal.

95ContiDriver,
Thank you for answer.

I try processing of 97Conti ABS module.
And I intend to install it.

[phrawg]

WAIT A MINUTE ........ Something I don't understand here.
A GPS nav system does not need any input from the car other
than power for the unit. If the antenna is properly mounted and
you are seeing the constellation of satellites witha good signal,
then the gps will track and update continuously. I work for our
transit system in electronics and we use gps for bus tracking.
We use a very sophisticated unit that uses bus motion pulses from
a sensor to do what is called "dead reckoning" while the bus may be
between several very tall buildings for a minute or two at a time.
The units that are used for personal navagation in cars that are
added on, do not do this, as this extreme accuracy on a second by
second basis is not considered essential for a personal user. If you
are having a problem with your unit and the diagnostics it runs seem
to indicate you have at least 4-6 satellites in your vision area at any
given time, I wouls seek to have the gps investigated into rather than
try to enhance it. Most if not all of the personal passenger car units
have no provisions to feed in, let alone process the kind of inputs
that one uses to do dead reckoning, such as wheel distance traveled
etc. If you have more questions post them with maybe more detail
on the unit you have and exactly why you need a hard input signal.
Hope we can help you somehow. Phrawg

[LSRX101]

Phrawg, here's what I've gathered from discussions on other sites.
Paraphrased- GPS units made for use in motor vehicles (are required to?) have a vehicle input that prevents use while the vehicle is moving. They will only display when the vehicle is stopped. This safety feature is cause for lots of complaints, rants and discussions about the Nanny State and "Big Brother".
I've seen numerous discussions about how disable this feature, supposedly so a passenger can read it. For reasons unknown to me, the GPS will not update without a signal from the VSS, and the VSS signal also prevents viewing while the vehicle is moving. At least that's the way I read it.

[phrawg]

Hmmmmm......... had not heard of that one. Guess I am looking at
aftermarket devices that only need to pop an antenna somewhere
it can see the sats, then plug inot the cig lighter for pwr. I was
unaware of a lockout. I figured the OP was trying to get an actual
vehicle motion measurement, not just the fact that it was actually
in motion or not. Maybe his unit is a "factory approved" or something
like that that actually "installs" in the car ? Phrawg

[LSRX101]

I should say that all "factory installed" GPS systems seem to work that way. The VSS signal blanks the unit while moving, but disconnecting the VSS signal causes the system to not update.
I'm not at all familiar with GPS. I've just recently read some discussions about it.
Now, if we could figure out how to disable cell phones in moving vehicles...

[Teru_jap.]

I live in Japan.
The Japanese road is disadvantageous to GPS.
For example, it is a small road, a sharp curve, a tunnel.
Therefore the GPS is apt to break off.
Gyro and VSS signal are introduced into the latest Japanese car navigation.

And many Japanese demands the correct position of the building.
Therefore VSS signal is necessary.

I find accuracy, too.


It is my plan as follows.

97Conti ABS module transmits VSS signal.
Therefore I buy 97Conti ABS module.

I diverge with a wire from the wheel speed sensor of the RH rear wheel."wire R/PK and PK/BK"
Connect the WSS wire to 97Conti ABS module."PIN#11 and PIN#12"
Connect a power supply to a module."PIN#1 and #13"
Output a VSS wire."PIN #26"
Input the VSS into a Navi.

Completion？？？

[phrawg]

Ok, Very interesting the plan you have. I understand now why you are
looking to, as we call it in the nav trade "dead reckon" your position.
This is where the gaps in sat coverage are very closely estimated by
gyro for turns and pulses for distance. Keep us up on how you are
doing to make this work. Also wondering is this GPS unit a factory Ford
unit or an after market and also will be curious as to how you will
calibrate the GPS for the number of pulses average per mile/km to
allow it to accurately determine absolute distance so there will be
very small correction when satellites re-acquire after a shadowing
incident. Or, is calibration not a factor, and you need only to prove
movement or not to the GPS. Hope it works for you. Phrawg