ADL speed reading

Discontinued earlier generation Dash Loggers

ADL speed reading

Postby Billzilla on Mon Jul 12, 2021 4:52 pm

Like the other thread, I have an ADL in one of my road cars and I've been driving it recently after it sitting on the hoist for about four years.
First couple of drives, the speed varied from fairly low up to a good 900 km/h or so. The car is fairly fast but certainly not in land speed record territory. Then the last couple of times it's been on the road it's been reading zero the whole time.
Any suggestions of where to start fault-finding please?
Ta!
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Re: ADL speed reading

Postby David Ferguson on Mon Jul 12, 2021 9:00 pm

You might want to start by sharing your config, or some logged data.

Possible causes:
- misconfigured software
- wiring fault (corrosion at connectors, physical damage to wiring or connectors
- failed wheelspeed sensor.
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Re: ADL speed reading

Postby SDean on Tue Jul 13, 2021 8:48 am

I'm with David on this one, but I would be concentrating on the wiring and sensor itself, unless a change has been made to the configuration in the dash recently.
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Re: ADL speed reading

Postby Billzilla on Tue Jul 13, 2021 9:30 am

SDean wrote:I'm with David on this one, but I would be concentrating on the wiring and sensor itself, unless a change has been made to the configuration in the dash recently.


No changes for over a decade at least. The wiring is quite difficult to get to, but I'll have to ... :(
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Re: ADL speed reading

Postby David Ferguson on Tue Jul 13, 2021 10:55 am

I'm betting you have have some house guests (like mice) that liked the yummy wires... Difficult for you to get to, perfect for mice...
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Re: ADL speed reading

Postby SprinterTRD on Wed Jul 14, 2021 8:08 am

Depending on your sensor location and sensor, A possibility may be that Iron filings have gotten into the sensor teeth causing extra pulses
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Re: ADL speed reading

Postby Billzilla on Thu Jul 29, 2021 11:49 am

Ta Steve, I'll check that out as well.
It's a pain in the rear getting the Fraser onto the hoist but I'll just have to do it.

And FWIW ...

https://www.youtube.com/watch?v=vlphHbY3mqA
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