12v Speed Sensor

Discuss which Sensors work best with these ECUs and share how you are using inputs and outputs
Tim
Posts: 81
Joined: Tue Sep 13, 2016 9:06 am
ECU Model: S80 Pro

12v Speed Sensor

Post by Tim »

https://www.sailesmarketing.com/shop/tr ... ransducer/

Anyone got experience with one of these?

Is it possible to get it to work with my S80 ECU? I'm imaging so, but given that it's 12v and not 5v I'm a little confused as to which input I should be using on the ECU, if any?

One more thing, seems you can get them in 4 or 8 pulse configurations, is one preferable over the other? I'm imaging that the higher the pulse count, the finer the data transmitted but feel free to correct me.

No real plans to use traction control at the moment, so I'm not really interested in wheel speed.

Thanks
Rob Stevens
Posts: 1247
Joined: Thu Jul 28, 2011 4:10 am
ECU Model: S100 Pro
Distributor: None-Coil On Plug :)

Re: 12v Speed Sensor

Post by Rob Stevens »

I guess you could use one of these if you have an old mechanical driven speedo, but only of any use if you want one speed input, otherwise you should use all 4 wheels for speed measuring, these are best located on the hub assembly.
The device you suggested looks to be used on truck tackoes etc.

the 12v or 5v supply element is only relevant to the electronics in the sensor itself, when sending a signal the signal wire is switched to ground. the ecu wheel sensor pin supplies a voltage and the wheel speed device switches this to ground, effectively the ecu has a pull up to +ve voltage resistor built in. If viewed on a scope it will go ground, up, ground, up, ground as the wheel goes round
Tim
Posts: 81
Joined: Tue Sep 13, 2016 9:06 am
ECU Model: S80 Pro

Re: 12v Speed Sensor

Post by Tim »

Thanks. Yes I understand to make the most of the S80, I'd have sensors on each wheel but for now at least, driven wheel speed will suffice.

I think this will give me that, if only to give me that data via CAN to display on my dash.

So, the next question is wiring related..

Brown : +VE supply
Blue : -VE supply
Green/Yellow : Square wave output

I assume then that Brown would be fed 12v, Blue a sensor ground and Green/Yellow pinned to one of the driven wheel speed inputs? Does it matter which?

Thanks
Rob Stevens
Posts: 1247
Joined: Thu Jul 28, 2011 4:10 am
ECU Model: S100 Pro
Distributor: None-Coil On Plug :)

Re: 12v Speed Sensor

Post by Rob Stevens »

Yes sounds fine, where is the speedo cable from? gearbox? However the pulses per wheel revolution may need a but of fudging depending on the reduction ratios at the gearbox etc.
If you are only looking for road speed connect it to the left un driven input.

If you are going to all the effort you should really fit a proper sensor to an un driven wheel, it opens up a whole lot of fun.
Tim
Posts: 81
Joined: Tue Sep 13, 2016 9:06 am
ECU Model: S80 Pro

Re: 12v Speed Sensor

Post by Tim »

My issue with fitting a sensor to the wheel is I have no ABS rings, I figured that was a bit of a show stopper?
stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: 12v Speed Sensor

Post by stevieturbo »

Then add rings or some sort of "teeth" to use as a trigger.
Tim
Posts: 81
Joined: Tue Sep 13, 2016 9:06 am
ECU Model: S80 Pro

Re: 12v Speed Sensor

Post by Tim »

Looks like it would just be a case of fitting discs from a later model car that came with ABS, should be fairly straight forward then. Certainly more so than I had initially imagined, hence the reasons for looking at other simpler solutions.

One of the reasons I'm asking this now, is that I'm just finalising my loom, and wanted to add provisions for wheel speed. Probably makes sense to add cable to wire multiple additional sensors and terminate them in a auxiliary DTM connector.

Thanks for all of your help.
stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: 12v Speed Sensor

Post by stevieturbo »

I just terminated 4 x 3 pin plugs local to the ecu, with the AMPSeal connectors. Then you can plug anything into them, or route the 4 wheels to wherever you want

Whether you have a toothed wheel on a disc, some disc bolts, a driveshaft, CV, whatever...there are always options for triggers.
Gabs
Posts: 3
Joined: Thu May 08, 2014 7:05 pm
ECU Model: S100 Pro
Distributor: Syntech Motors

Re: 12v Speed Sensor

Post by Gabs »

Greetings to all, whom this post might be usefull!
(Hopefully placed in the proper index)

There's an easy solution for wheel speed inputs to DTA, just using the original ABS sensors and senders - basically they're inductive...
Saves a lot of time, fabricating, developing etc.
Mainly most of the projects we and you are into, are/where/or could be equiped with OEM ABS stuff.

Opel (maybe other manufacturers aswell) has a solution in previous models - ABS signal (wheel speed sensor) converter for the speedometer - in the relay board, made to fit standard relay connector.
It's made to convert inductive (VR) signal into HALL effect signal.

I could write a novel about for what we already used this resort, simply it works OK with it's statistically very-very minimal signal mistakes.

The GM # is updated, you'll find it...

If you're an electronic expert or maniac, you can remake and modernise the original setup in the orange box. We later did it to have a compact 4 wh input/output block for easy installation.

Try it and use it! Cheers
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katana
Posts: 455
Joined: Sun Jan 27, 2013 6:08 pm
ECU Model: S60 Pro
Firmware Version: 29

Re: 12v Speed Sensor

Post by katana »

Very useful - try doing that with a '68 Cooper S or a mk2 Escort !
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