massacra
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« on: July 31, 2018, 05:51:40 PM »
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Maybe someone know how is it possible to connect digital speed signal to mk2 clusters?
I have to do this, cuz i need a speed signal in the ECU.
Is there any possiblities?
Ori Golf ii cluster has mechanical speed sensor.
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dream
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« Reply #1 on: August 02, 2018, 01:04:20 AM »
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You already gave yourself the answer, its mechanical not electronic.
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adam-
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« Reply #2 on: August 02, 2018, 01:54:47 AM »
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Can you not fit the MK3 cluster?
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cherry
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« Reply #3 on: August 02, 2018, 09:30:08 AM »
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I think he means how to get speed signal? You can fit speedsensor on backside from MK2 cluster, in past it was used for GALA (geschwindigkeits-abhängige-lautstärken-anpassung = speed dependent volume adaption) function. Or just remove speedo shaft and fit MK3 speedsensor on gearbox and use MK3 cluster...
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_nameless
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« Reply #4 on: August 02, 2018, 10:11:11 AM »
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mfa / cruse control equipped mk2 have a vss output from the cluster
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Giving your mom a tuneup
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dream
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« Reply #5 on: August 06, 2018, 03:21:24 AM »
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Maybe you could try to use the MK3 speedometer to fit in your MK2 cluster, but I am not quite sure if it will fit in a decent way.
In that case you could use the MK3 signal sensor and have it digital or as adam mentioned using a MK3, which I have seen working by a few people.
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vwmaniac
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« Reply #6 on: August 11, 2018, 09:36:11 AM »
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As far as I know a tradition speed signal will not work for a 24v ecu as it uses can bus from abs for vehicle speed. There is apparently some asm changes needed to use the speed signal from speed sensor or cluster.
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_nameless
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« Reply #7 on: August 12, 2018, 03:52:31 AM »
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As far as I know a tradition speed signal will not work for a 24v ecu as it uses can bus from abs for vehicle speed. There is apparently some asm changes needed to use the speed signal from speed sensor or cluster.
Mk4 24v vr6 100% uses mechanancal speed sensor. You can flip.some bits for speed from can but stock it looks for speed from mechanical sensor in the trans |
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Giving your mom a tuneup
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vwmaniac
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« Reply #8 on: August 13, 2018, 03:19:19 PM »
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Mk4 24v vr6 100% uses mechanancal speed sensor. You can flip.some bits for speed from can but stock it looks for speed from mechanical sensor in the trans
I know it's there on the trans, and I know it's in the pin out for the ecu but it does not react on the bench or in the car. When I swapped the r32 setup into my 2000 glx mk4 I had no speed signal to ecu untill abs module was plugged in, i did have speed signal to cluster before abs was plugged in. It seems as though its canbus from abs. You can test on the bench by pulsing ground to pin 54 and you will see what I'm saying. Any other ecu that's takes a direct signal will show speed go up in measuring blocks ie 1.8t or 12v vr6. This is only based on my experience with 2.8 24v ecus and r32 software on them. |
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rysiektr
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« Reply #9 on: September 22, 2018, 01:04:35 PM »
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It's possible to do. I use peed sensor from Opel Kadett from EU market. That Speed sensor have digital output and mechanical to mk2 cluster.  |
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dream
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« Reply #10 on: October 15, 2018, 07:03:01 AM »
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Do you got that working already?
And could you give the part no?
Greetings,
Dream
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airhaddock
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« Reply #11 on: November 07, 2018, 06:01:03 AM »
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maybe a stupid suggestion but you could use an arduino with a CAN shield and GPS receiver and then send vehicle speed over the CAN bus. It sounds complicated but it's not that bad and the parts are cheap. Happy to help if you need it
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terok
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« Reply #12 on: November 07, 2018, 07:02:28 AM »
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Yes you could do this, if you only need speed info for speedometer. GPS is not even close to being fast enough for control units. Ecu only might, but DSG definitely does not. If you have a retrofitted DSG, DO NOT try this while driving into a tunnel.
I used GPS with my cars speedometer for a while. Also briefly tested sending that speed info to CAN, but DSG throwed in a towel after 15 meters of driving. Result was no drive at all.
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airhaddock
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« Reply #13 on: November 07, 2018, 07:39:32 AM »
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Do you know what the ECU is using vehicle speed for? For DSG, could you not use engine speed * gear ratio calculation and make an approximation with speed gradient during shifts?
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prj
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« Reply #14 on: November 07, 2018, 11:06:21 AM »
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All (?) ME7 have digital VSS input on dedicated pin.
Using that VSS input is only a matter of configuration, never seen it any other way yet.
It can take the signal from ABS CAN, from Kombi CAN or from dedicated wire.
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