Mfa not working

Hi all first post here, recently bought a mk2 golf gti 8v which needs a bit of tlc

one of the issues I’ve been scratching my head over is the instrument cluster / mfa

the MFa doesn’t work at all, no read out no lights nothing. The fuel gauge seems vague, and very slow to give a reading (is this normal?) and the temp gauge only ever gets to 1/4.

I’ve taken the instrument cluster out and there’s nothing that appears broken or damaged. I’ve checked the earth on the rocker cover as some people have suggested. Rev counter and speedo work fine. Not really sure what to try now if anyone’s got any suggestions??

 

Speedo works on 12V and coil signal, so you've got mass and power I'd say.

Is the display also not working?

 

There's a member on here NateS2 that used to repair clusters , motometer type only

Hasn't been logged in the forum since Jan tho.

https://www.clubgti.com/forums/index.php?threads/motometer-cluster-mfa-repair-fix-found.288785/

 

the display doesn’t work no, everything else seems ok on the panel, I’ve shorted the connector from the temp sender and the gauge does work and all the other gauges and lights work so it seems to be the display that is the issue. I may open the cluster up and see if I can find anything

 

Good luck, I am curious what you are going to find as there is not a lot to see. Be very careful with the foil, it is very sensitive. You can measure on the connections though, maybe it is a simple line break.

https://www.autofans.nl/bestanden/Golf/IMG20211003151245s.jpg

 

So I’ve had another look at my cluster, but confused as the pcb says vdo as does the speed gauge but the rev counter says Moto meter?? Not really sure what’s going on there but does anyone know if the vdo clusters are repairable or am I wasting my time? It’s a post 90 single plug cluster

 

I would suggest that the lcd display is shot They are replaceable.

 

NateS2 Is an absolute whizz with these bloody things and loves his mk2 overdubs.
We just need to find him
He sorted my 86 GTI last year

 

Thanks for all your reply’s I’m working through what I think it could be.

I’ve disassembled the instrument cluster which looks to be a VDO board as Johnny says, can’t see anything untoward, tested what I believe to be the 5v voltage reg (difficult to tell as it’s mounted upside down) and I’m getting 2.5v. So I’m thinking this could maybe be the culprit but as everything else on the instrument cluster works I’m kind of thinking maybe not.

I have ordered a new screen as mine has a bleed anyway but even still I’d assume it would still display something if there was no issue with the board??

 

I would replace the voltage reg if it puts out half of what it should.

 

Replaced the lcd screen this morning and just like that I have a working mfa!

thanks everyone for your help

 

Hi, hopefully you can help with a similar issue. The lads who are helping rebuild my MK2 GTI have re-assembled the clocks with a new screen that I provided, but it looks as though there's an issue with the screen or the circuit. Would anyone be able to provide some advice on this please? (the clicking is me pressing the MFA button as you can probably guess).

Thank you

 

Great, thank you - I didn't realise there was a difference. I will try and find out. It's so long since I bought that screen that it could be for either.