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TonyH
Member Since: 01 Mar 2006
Location: Market Drayton, Shropshire
Posts: 211
  
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I know that the subject of finding a speed pulse for non LR Satnav has been broached in previous topics but I would like some help. I am transfering my VDO Dayton 5000 from my old Disco Series 11 to my new Disco3. The auto electrician doing the job confirms that in order to provide the VDO Satnav with the correct type of pulse he needs to fit what he calls a Canbus??? This electronic gismo apparently converts the pulse but will cost in the order of £130.
Could someone explain and is the cost sensible.  *Disco3 7-seat Auto
March 2006
Zermatt silver
*Disco TD5 GS Manual
2001
Epson Green
108,000 miles without a single problem
*Disco TD200 Manual
1993
Bonatti Grey
55,000 trouble-free miles
*Various company cars, no comparison
Last edited by TonyH on 17th Mar 2006 7:04 pm. Edited 1 time in total
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 14th Mar 2006 7:24 pm |
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marcon
Member Since: 01 Mar 2006
Location: wex's Shed
Posts: 457
 
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I dont know if the price of this is a bit steep but I have BPunk Travel pilot installed since april 2005 waiting to find how to connect speed pulse so any info you can put my way would be of great help. 
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| 14th Mar 2006 10:51 pm |
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grommet
Member Since: 15 Feb 2005
Location: Northern California
Posts: 331
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The "Canbus" is a bus (and standard) that lets specific modules of the vehicle speak together. It's not a device.
As I said before, the ABS module is probably the only place you can tap the pulse fairly easily... http://www.disco3.co.uk/forum/viewtopic.php?t=3282
But I don't know exactly what your devices demand for input...
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| 15th Mar 2006 12:09 am |
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TonyH
Member Since: 01 Mar 2006
Location: Market Drayton, Shropshire
Posts: 211
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Hi Grommet
Thank you for your prompt response and information provided. As you can tell, I am not that familier with auto electronics and all I can tell you is that I am informed by the auto electrical experts that the wave form of the intelligent speed pulse needs to be converted from sine to square in order for the Satnav to understand and be able to calculate realtime MPH and miles driven.
The new Discovery3 apparently requires an expensive CANbus controller for the transfer of data and pulse synchronisation for compatability with the VDO Dayton Satnav and most other non LR systems. This was not necessary on my previous TD5, which output a basic pulse form. I don't think that there is any problem in finding the source of the pulse but they do refer to the need for the expensive CANbus controller.
Thanks for your help, I guess I will just have to pay up. *Disco3 7-seat Auto
March 2006
Zermatt silver
*Disco TD5 GS Manual
2001
Epson Green
108,000 miles without a single problem
*Disco TD200 Manual
1993
Bonatti Grey
55,000 trouble-free miles
*Various company cars, no comparison
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| 15th Mar 2006 7:31 am |
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TonyH
Member Since: 01 Mar 2006
Location: Market Drayton, Shropshire
Posts: 211
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Hi Marcon
My VDO Dayton Satnav has been refitted (excluding connection to speed pulse, still waiting for the CANbus controller) into my new Disco3 and it works fine, even showing MPH and miles travelled. Therefore, I believe it only needs the speedo pulse when there are insufficient satellites available, simply to keep up to date with where the car is. I think it may use the pulse in combination with the inbuilt giro to keep on course when it cant get a valid satellite triangulation. I don't know how the Travel Pilot works but will try to get some info for you.  *Disco3 7-seat Auto
March 2006
Zermatt silver
*Disco TD5 GS Manual
2001
Epson Green
108,000 miles without a single problem
*Disco TD200 Manual
1993
Bonatti Grey
55,000 trouble-free miles
*Various company cars, no comparison
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| 15th Mar 2006 3:40 pm |
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marcon
Member Since: 01 Mar 2006
Location: wex's Shed
Posts: 457
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Thank's for your help,any info will be much appreciated.
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| 16th Mar 2006 12:05 am |
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grommet
Member Since: 15 Feb 2005
Location: Northern California
Posts: 331
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So, have your installers even attempted tapping the signal at the ABS module? It should carry a normal speed pulse... Is it the "wrong type" for your devices?
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| 16th Mar 2006 12:43 am |
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TonyH
Member Since: 01 Mar 2006
Location: Market Drayton, Shropshire
Posts: 211
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Hello all,
I really don't know about the pulse from the ABS but as I understand the Disco3 speed pulse does not provide compatible information for most "wired-in" non LR Satnav systems. As I explained in a previous posting, the speed pulse is only required when the GPS signal is lost or there are insufficient satellites to enable a triangulation. In this case the speed pulse and Satnav gyro enables the system to continue to confirm and give guidance on the planned route until GPS is restored. So, the satnav will operate without the speed pulse signal but will fail when GPS is lost.
The CAN Bus interface is designed to provide a vehicle speed signal for vehicles using the CAN Bus system and it can also, where required, be wired to detect other electronic functions using the vehicle's CAN bus.
The Hunter CAN Bus CB8-R multi output interface is the one that is compatible with the LR Discovery3 and is wired at the on-board diagnostic connector (OBD-II), Pin 14 CAN Low, Pin 6 CAN High.
Since having it fitted, I have put it to the test and it does work!! 
Hope this helps but further info available at www.huntertranducers.com *Disco3 7-seat Auto
March 2006
Zermatt silver
*Disco TD5 GS Manual
2001
Epson Green
108,000 miles without a single problem
*Disco TD200 Manual
1993
Bonatti Grey
55,000 trouble-free miles
*Various company cars, no comparison
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| 16th Mar 2006 7:30 pm |
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grommet
Member Since: 15 Feb 2005
Location: Northern California
Posts: 331
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My only point is that the ABS module depends on the same basic speed pulse that some 3rd party Navigation systems require... so maybe getting that Hunter module is redundant. There might already be an appropriate converted output.
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| 16th Mar 2006 9:12 pm |
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TonyH
Member Since: 01 Mar 2006
Location: Market Drayton, Shropshire
Posts: 211
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Thanks for your advice Grommet. Too late for me, but for those having a non LR fitted, it's worth querying whether a pulse can be obtained from the ABS rather than tapping the CAN bus by way of a relatively expensive interface. *Disco3 7-seat Auto
March 2006
Zermatt silver
*Disco TD5 GS Manual
2001
Epson Green
108,000 miles without a single problem
*Disco TD200 Manual
1993
Bonatti Grey
55,000 trouble-free miles
*Various company cars, no comparison
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| 17th Mar 2006 7:10 pm |
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