Hi

We have recently bought a Fabia Combi Elegance 2011 and are having issues with the central locking.

Symptoms and fault codes are exactly as in this post  

Does anyone have any information about TPI document no 2026500/2 from 2011-07-14 ?

Or what exactly is included in repair kit 5J0 971 658?

 

Thank you

 

It's a long time since I had this car, but I know it got fixed. I have no recollection of what the dealer did, but if course it was under warranty at the time. 

The repair kit appears to be a protection diode ( https://en.m.wikipedia.org/wiki/Transient-voltage-suppression_diode  with flying leads coming off it

https://izap24.kz/tovar/14806306_fragment-svyazki-5j0971658-skoda-novaya-original.html

You can probably view the TPI via erWin Skoda, but you'd have to pay a small fee for access. There may be someone on here who knows what it says though.

I suppose it just tells you where you graft in that/those.

Here you go, probably enough to work with:

MLab.org.ua • View topic - VW Jetta 5 - not clear glitch with central locking (mlab-org-ua.translate.goog)

Seems to be suppressing spikes from the lock motors.

Thanks Breezy_Pete that's great.

Will you give it a go yourself?

I expect a Skoda dealer will sell you the two diodes. 

Not sure what the red symbol on the earth connections is all about.

Yes.  Was going to give it a go.  I'll have a look at the info you sent on the pc when I get in.  Too small on the phone. 😀.  Or I'll have a look in erWin.  Thanks again.

Could do with someone who can read Russian to see if the photographed text refers to that red symbol, other than that it looks to be mainly a case of finding the correct three wires to string the diodes between. 

The pin numbers they come from at the lock module are 1, brown wire; 2, blue/yellow wire; 3, violet/yellow. Note that there's also a yellow/blue wire to potentially confuse matters, and another brown wire from pin 6. Typing that has made me realise that the red symbol is probably there to warn "not this brown wire, it's the one from pin 1 you need to connect the diodes to".

The three correct wires are slightly thicker than the others, which should help to spot them.

other possible solution is fit a later BCM if you have access to VCDS or similar to code it to your car.

Yes, Russian translator could be useful, but can't be that complicated.

 

I did consider a later BCM,  from a breaker, but thought a couple of diodes would probably be cheaper.....but who knows until I go to Skoda to buy them.

You could research what an appropriate voltage value of the diode might be for this application and probably get them for about 50p for the pair from the likes of RS/Farnell. The motors are (nominal) 12V driven, I expect (based on earlier cars with separate central convenience module).

A transil/transorb to suit an approx 14.5V supply would seem to be the badger. 

Yes, good idea Breezy_Pete. A bit of research and source them cheaply somewhere else.  Give me a bit of a project.  Thanks.

An update.  I did find some TVS diodes and fitted as per diagram.  Been a week or so now, and all working perfectly. I used 1.5KE36CA. (£1.99 for 10 on Ebay) CA are bidirectional, which I knew I needed from the diagram in the TPS.  36 is the voltage. In the photograph of the Skoda part you can see that it is E33.  Ended up with E36 as could not source the E33 in a reasonable quantity at the time.  1.5 means they will handle instantaneous power of 1500W.  Did find E33 with lower power rating, but decided to go with higher power rating to be on the safe side.

Thanks to all, especially Breezy_Pete for the excellent TPS information

Nice work.  Good spot on the E33, I was hoping someone would find out or know what the official part was rated.

Pretty sure the next one down in voltage would do too e.g. STMicroelectronics 1.5KE30CA, Bi-Directional TVS Diode, 1500W, 2-Pin DO-201 | RS Components (rs-online.com)

Really surprised that the original owner had never had it sorted. Fingers crossed it keeps working.