Chaps, I havent managed to get on the forum as often as id like atm. Drop me a PM with your address etc and will send you payment details over and can get in post to you this week.
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Odometer not working
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What else could cause the odometer to not work?
Mine wasn't working ( speedo was ) so I got a new gear from Greg and stripped the clocks, only to find the gear was fine. But I damaged the speedo when removing the needle, so I've fitted another set of clocks, only to find I have the same problemsigpic
1991 Audi S2 3B - 2.5 Stroker engine
1997 A6 2.5TDi quattro avant - C4
1976 RD250E / 350LC cafe racer
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G22 Vehicle Speed Sensor (VSS) and G21 Speedometer info
Originally posted by Rusty View PostSignal comes from the ecu I think.
G22 Vehicle Speed Sensor (VSS) and G21 Speedometer info
http://forums.quattroworld.com/s4s6/msgs/168463.phtml
The G22 speed sensor signal gets to the G21 speedometer without processing by the ECU. The ECU gets the signal on Pin T55/50 but only via the G21.
AAN ECU (for example, ABY and ADU effectively the same) Pin-out:
http://forums.quattroworld.com/s4s6/msgs/21009.phtml
RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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The sensor is irrelevant. Andy said the speedometer works fine - the signal is reaching the instrument cluster.
Andy did you change the instrument cluster wholesale or just the speedometer?
If you remove the speedometer from the instrument board it is connected by the 4 or so long pins. I wonder if you have some corrosion or similar on yours?
I had some odd behaviour from my trip computer, which was caused by those long pins. They looked fine visually but after I dosed them with deoxit and some dielectric grease problem solved. Also check the board itself for cracks and dry solder joints.Panthero Coupé quattro 20vt
Indigo ABY coupé
Imola B6 S4 Avant
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Worth noting too that the later speedometers (post 94 ish) look nothing like the early ones in the PDF guide on the first page of this thread. They are far more tamper resistant and can't be dismantled without at least some desoldering of the boards. I'm not sure if the odometer gear is the same or not.
Panthero Coupé quattro 20vt
Indigo ABY coupé
Imola B6 S4 Avant
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Just replaced the gear on my own odometer with one sourced from the ebay seller listed above, works perfectly
http://www.ebay.co.uk/itm/271688757359
He also sells the larger gear but on mine it was only the little gear that had failed.
http://www.ebay.co.uk/itm/271688816905
As Error has shown above the later units were a completely different design, pics below are from my own car with a 1993 date, and the later one is marked 1995. Obvious external difference is the two screws holding the dial face on are flat head screws in the 93, and torx in the 95. Looking at the later unit i can't see it failing the same way, but with the early units the key is never to reset the trip meter while moving.91CQ20v - Gone to a new home
93UR-S4 - The Magic Carpet
94S2Bus - The Emerald Express
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Other than broken gear, there may be cold or broken solder joints on the odometer motor or elsewhere. Try resoldering any solder joints, that look broken or unusual.
The later model VDO speedometer design is without planetary gear system. They are a lot more tamper proof and they don't seem to break down. The speedo needle is not removable. If you try to remove it, it comes out with it's internal axle and bricks the speedo completely. Bad solder joints can be a problem on later design too, but it's all repairable easy.
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Electric bit is fine, the early version looks much more straight forward and easy to troubleshoot. I don't get on with this new fangled surface mount stuff91CQ20v - Gone to a new home
93UR-S4 - The Magic Carpet
94S2Bus - The Emerald Express
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Yes. If you want to fit a later speedo into your existing instrument cluster you need to use the white mounting panel for that speedo as its a different shape. Everything else is the same as i took the fuel, temp, and rev counter from the later cluster and fitted them into mine.91CQ20v - Gone to a new home
93UR-S4 - The Magic Carpet
94S2Bus - The Emerald Express
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