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| Speedo not working; TDaily 2.8 W2000 plate 1998 body speedo fault | |
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| Tweet Topic Started: Mar 26 2012, 12:21 PM (51,745 Views) | |
| stroppygit | Mar 26 2012, 12:21 PM Post #1 |
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This is the parcel force xlwb electric coach style door van. Hi, not exactly a new topic. I've tried to follow the various responses to other posts on this to no avail. My speedo was fine, got a new mot and on the next trip after being parked up for many months the speedo had stopped operating. I don't know if the odometer is functioning as I haven't gone anywhere! with the exception of the fuel gauge (which stopped working a long time ago), all other dash instruments and lights are working. The Central Interconnecting Unit (fuse box to us mortals) got wet and I dried it out over a radiator. The blower fan which had stopped working now works but not the speedo. Battery voltage 12.5v I've tested the sender units plug (at the side of the gearbox) one pin has just over 8v The three brown leads that go to the speedo are all showing continuity to earth, yes the little brown lead is present on the battery negative, this is what I checked for earth continuity. The red lead reads 12.5v grey 0v green 11.8v ign on, 0v ign off. I'm guessing the grey and one of the browns are to carry the signal from the sender? What else can I test? can anyone tell me, for instance, where the four connections of the sender plug emerge in the cab or CIU so I can test for continuity. Edited by stroppygit, Mar 26 2012, 12:23 PM.
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| Bazil-S | Mar 26 2012, 01:05 PM Post #2 |
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http://dl.dropbox.com/u/14168135/Taho_Fr.pdf |
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| stroppygit | Mar 26 2012, 03:59 PM Post #3 |
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Ah Merci pour votre assistance Bazil-S. Well that's me out of French for the moment. Looks really useful, I'll have a nose based on that and report back. |
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| stroppygit | Mar 26 2012, 05:10 PM Post #4 |
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This is driving me mad! the yellow connector to the left hand (B) socket on this speedo only has a lead to pin 3 the lead is labelled 5513. This lead has a line socket coming back out of the connector with no sign of anywhere that it might be connected to. This socket has only pins 1 to 3 inclusive fitted. This means that none of the wires I'd like to be checking for continuity seem to exist. The 'A' (right hand) connector seems to have the appropriate numbers on its wires. I am now at a dead end. Edited by stroppygit, Mar 26 2012, 05:11 PM.
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| Bazil-S | Mar 26 2012, 08:03 PM Post #5 |
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Hi, The Wire 5517 comes from the sensor (2C), thru XX and XIX connectors, then reach the speed limiter, use only at the 4X4, then reach the tachograph. At the speed limiter (or just a dummy connector), the 5517 wire will change the code in 5513. Speed limiter is located above the fuse box. It is a white box. Check continuity between connector B from the tachograph and sensor connector. |
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| Bazil-S | Mar 26 2012, 08:29 PM Post #6 |
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Sorry, I didn't noticed that the pages are in French. http://dl.dropbox.com/u/14168135/Taho_En.pdf |
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| stroppygit | Mar 26 2012, 09:07 PM Post #7 |
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Thanks Bazil-S, I think I must have the dummy connector as there's no sign of the speed limiter. I'll do some mulitmetering tomorrow! |
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| stroppygit | Mar 27 2012, 06:21 PM Post #8 |
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Hi again, one of the leads at the sensor shows continuity to every pin but one of Connector A when the ignition is off and every single one when the ignition is on! 5513 on B has no continuity to anything on the sensor. I'm including some pictures in case I've mislead as to which model we're looking at. This is partly prompted by the fact that the connectors shown in the pdf you linked me to are not present on this vehicle, it's the older non-curvy looking bodyshell. |
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| stroppygit | Mar 27 2012, 06:22 PM Post #9 |
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and the leads in the dash........ is the CIU involved in any of this? Sorry to be so thick, but if I knew what I was doing, I would have finished by now! Edited by stroppygit, Mar 27 2012, 06:24 PM.
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| Bazil-S | Mar 27 2012, 07:04 PM Post #10 |
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Hi, How many wires are in the A connector?...5, or 6? From CUI should come ignition positive. Edited by Bazil-S, Mar 27 2012, 07:22 PM.
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| stroppygit | Mar 27 2012, 07:27 PM Post #11 |
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Hi, Thanks. Pin numbers and corresponding wire colours 6 wires in total using 5 pins 1 Red 2 Grey 3 Green 5 two brown leads 6 brown and yes, one of them is live when ignition is on (mentioned above) Edited by stroppygit, Mar 27 2012, 07:53 PM.
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| Bazil-S | Mar 27 2012, 09:32 PM Post #12 |
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1 Red = positive 2 Grey = dashboard light - 4444. 3 Green = ignition positive (speedometer supply) - 8879. 5 two brown leads = earth for speedometer and sensor ( direct to battery) - 0066. 6 brown = Edited by Bazil-S, Mar 31 2012, 07:22 PM.
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| Bazil-S | Mar 28 2012, 04:54 AM Post #13 |
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Hi, It seems that there are differences between the speedometer and tachograph, at connectors configuration. At the speedometer the connector B is used only for output signal. However, there must be a connector in the engine compartment, for the junction between the cab and chassis. |
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| stroppygit | Mar 28 2012, 12:38 PM Post #14 |
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Hi Bazil-S The connector labelled XX is nicely hidden behind a panel above the battery in this model. Behind the panel is the windscreen wiper motor and a tangle of Iveco spaghetti wiring! I will test these connections shortly. Once again, thank you for all your help. I'll post a photo of this location for others to save themselves some hunting. |
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| stroppygit | Mar 28 2012, 04:44 PM Post #15 |
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Still lost! Eliminated: xx connector to sensor plug/socket of wiring. The xx connector has appropriate continuity for all of it's connections to the sensor plug/socket. There seems to be no correlation between the readings I'm getting testing from the other side of xx connector (the one with only tree wires) against the A connector for the speedo. The following is what happens when multimeter is connected across the speedo A connector and the xx connector under bonnet. Both the speedo unit and sensor units are not connected at this point. I set it on DC volts to see what might be happening as the continuity check didn't seem to have any bearing on the suggested readings. If the CIU has more to do with this than simply supplying the +12v then I wouldn't be surprised if that is the problem, as I said it got wet (roof leak) and is itself a replacement for one that suffered the same fate a while ago. The first one (once properly drowned) turned on the headlights on its own and the windscreen wipers too. Edited by stroppygit, Mar 28 2012, 05:00 PM.
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