Speedometer not working

[Juddlin]

Hiya,

Hope everyone is having a great weekend.

2013 Berlingo van… dunno the rest TBH!

Last week my window switches broke, I bought a new panel off eBay and fitted it with no issues. Windows worked perfectly… I took my van out for the first time today and noticed the speedo wasn’t working. It wasn’t at the zero mark, but all the way round to the opposite side. It does flicker but never goes back to its original place or moved with the speed.

I did remove the cover to clean the plastic ‘glass’ after I noticed there was a tiny leaf stuck between the glass and grey plastic.

Could I have broken the pin? Will I need to look at replacing the cluster? If I need to replace the cluster will the info from the millage and service info be transferred to a second hand cluster? COULD it be that I manually move the needle back to where it should be?

Hopefully someone can help, I’m self employed and need to get back on the road!

Ta

[oilyrag]

In the absence of a more expert reply - did you remove/unplug the instrument cluster? Also, did you use the van directly after the window switches were done, or did the speedo problem happen on your first run out after you'd fiddled with the speedo? I wonder if the car needs a re-set after installation of the switches.

[Sol]

If you fit a cluster with lower mileage, then all should be well on that front as the higher figure currently held in the BSI will be transferred to the clocks. BUT if you fit a cluster with higher mileage, then that higher figure will be transferred to the BSI and become permanently wrong. The system is designed to take the highest value of the two devices (BSI and Cluster) and copy it to the one with the lower figure.

BSI = Body Systems Interface - basically the body computer and general guvnor of all things non-engine related

Does the speedo go back to zero with the ignition off? The speed signal on the B9 comes from the ABS system but it would be read by the BSI first and then sent to the cluster as a variable frequency signal or variable voltage. It's likely the data is sent over the CAN or VAN bus and then decoded by the BSI, then converted to a signal that can drive the electronic speed gauge.

[Juddlin]

If you fit a cluster with lower mileage, then all should be well on that front as the higher figure currently held in the BSI will be transferred to the clocks. BUT if you fit a cluster with higher mileage, then that higher figure will be transferred to the BSI and become permanently wrong. The system is designed to take the highest value of the two devices (BSI and Cluster) and copy it to the one with the lower figure.

BSI = Body Systems Interface - basically the body computer and general guvnor of all things non-engine related

Does the speedo go back to zero with the ignition off? The speed signal on the B9 comes from the ABS system but it would be read by the BSI first and then sent to the cluster as a variable frequency signal or variable voltage. It's likely the data is sent over the CAN or VAN bus and then decoded by the BSI, then converted to a signal that can drive the electronic speed gauge.

ok, so I noticed the Speedo not working after my first run out after fitting the new window switches.

It was at the bottom of the clock on the opposite side to the zero… let’s say 5 o’clock.

I removed the front face only to get at the debris stuck at the bottom I didn’t remove or unplug the cluster st all -, yesterday I flicked the needed over to the zero mark and took the van out and it seemed to work after finding it was no longer working. This morning it’s back to the 5 o’clock mark again and flickers as if it’s trying to count the speed.

I’m not a mechanic and don’t now how to reset the van… 

I was hoping this would be simple!!

Thanks for your answers so far, the only reason I’m here is because my local Citroen/Peaugot independent garage could give me a time to get it fixed.

I can get a photo up if that helps?

Ta

[Sol]

A photo might help but I can imagine what it's doing.

It may be better to pull the needle off, then put it back on at the zero point instead - see if it works? Maybe first however, try a BSI reset (google it to see it on youtube)

Try one of these links:

https://www.google.com/search?q=youtube+...e&ie=UTF-8

[deejay_xb]

I think you have a bad electric contact, so:
Remove the plug from the car to the cluster, use an electric contact spray to clean the plug and the cluster connector, then plug it back and be sure it makes proper contact.

[Sol]

It's going to maximum speed when started...

[deejay_xb]

then speed sensor checked/cleaned

[oilyrag]

I've often taken the view that many car issues are self-generated - at least by me - and fiddling with anything electrical on a Berlingo is opening a very unpredicatable can of worms. You can be as careful as you like, but it does illogical things, even to the wary.
Going back to the basics of what happened ....there was nothing at all wrong with the speedo but the window switches needed changing.  
Assuming nothing was physically done to the speedo or its sensor then the speedo issue is likely to be directly connected to the switch installation. The switch install went OK as the windows work but something was triggered within the Berlingo's brain to generate a fault in the speedo.
My first take would be to undo what I'd done and remove the switches, even re-instate the old ones, and see what happens to the speedo. If the speedo reverts to normal the there's something up with the switch install/part. 
If nothing changes then the next thing is to try to re-set the Berlingo brain, having re-fitted the (good) switches. The re-set is described above. 
All no-cost options.
Let's see what that gives 

[Sol]

then speed sensor checked/cleaned

There is no speed sensor to check or clean on a B9, the BSI drives the Speedo based on data from the ABS controller, received over canbus.

M59 have a sensor.