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Discussion Starter #1
Hi all, can a U.C.H unit be reprogrammed on a Laguna 2, i'm getting conflicting reports from dealers and garages, some say they cant, some say they may be able to and some say maybe but with a loss of some features???, basically mine was fried due to water damage and I got one out of a scrapyard ( from a good,dry car ), and now im stuck... I dont know what to do or who to take it to.
 

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The official answer should be no. The UCH, ECU and steering lock must all have matching serial numbers. These numbers are programmed into a write-once memory, so once they've been written with one serial number, it can never be changed.

Once 'paired' in this way, the units can only be taught new keycards. Maybe this is what some of the dealers are referring to when they say that they can be partially reprogrammed.

The only way to get the UCH from a scrap car to work is to lift all of the other paired components too and transplant the lot. If the donor car doesn't have the same engine, then obviously this is a non-starter because the ECU won't be right.

But we've had one member who managed to dismantle his broken steering lock and transplant the working parts from a scrap one into it while still maintaining the original electronics and therefore the serial number. If your UCH isn't that badly damaged, then maybe this is an option. As it stands, I don't think you have much to lose.
 

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Discussion Starter #3
So i'm buggered then really, the UCH is going to be around £400 in total, including fitting and programming, does this sound about right??, If I could get an unused one it would only cost £65 to programme the bloody thing, only thing is I cant get one from anywhere exept renault!!!
 

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I'm afraid that's about the top and bottom of it. This extra security is supposedly a theft deterrent, though I personally think they just saw the potential to make some extra money by ensuring that scrap/reconditioned boxes were no longer viable.

If you have any independent Renault specialists in the area, then they might be able to get the part for less and they should be able to program it for you for less than what Renault would charge. Other than that, they've got you over a barrel to the tune of 400 quid :(
 

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There may be companies who can repair the damaged unit.....

It's got to be worth an internet search and see what comes up.I know BBA Reman are involved with ECU repairs and other electronic bits and pieces,so it might be worth asking them.They have an excellent website,and if you call them they are exceptionally helpfull and knowledgable.
 

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Discussion Starter #7
Great stuff not only does the UCH need replacing and reprogramming at a cost of 312 quid but it also needs a new " steering lock " at a cost of over £200, does this sound right or am I just being fleeced!!!
 

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any ideas on y , if id unplugged my fusebox prob unplugged for an hour, that when i plugged it all back in, eveything came on as if i was about to drive away, immobilliser still on, and key not even in ignition.........
 

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sounds like your being fleeced to me unless the uch water ingress has shorted lock out? only programming for new uch is to code it to all other components and the key card. not all uch are coded to vehciles new meganes and scenics and clio ones just plug and work no need for any coding all coding for them is stored in ecu. have you tried drying old unit out and openeing it up and cleaning it with electrical contact cleaner? done it with a clio one before with sucess
 
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sounds like your being fleeced to me unless the uch water ingress has shorted lock out? only programming for new uch is to code it to all other components and the key card. not all uch are coded to vehciles new meganes and scenics and clio ones just plug and work no need for any coding all coding for them is stored in ecu. have you tried drying old unit out and openeing it up and cleaning it with electrical contact cleaner? done it with a clio one before with sucess
useful answer but the post is two years old and the poster hasn't been on the RF for a year
 

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everything clean n dry though, had it unplugged day before put back 2gether all good took out again for longer duration next day plugged back in, dash came up without key in ignition, just wondered if there a set up sequence i.e shorting batt leads, put them back on batt, turn key to prime and hold down plip remote?
 

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Still useful info maltech ... also CPC do a circuit board cleaner that uses white spirit and distilled water to clean up water damaged boards ... we have one at work we use for the blackberries our "power users" have dropped in the wash hand basin/sink/puddle etc .... also works well with key cards that are water logged and mobile phones ...might be worth a go if you can beg borrow or steal one.:)
 

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Yea useful info except its complete nonsense. New meganes and scenic UCH's DO have to be programmed and the keys also need to be reprogrammed
 

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thought as much, y it work perfik as had it out 3 times, not a drop of moisture took it out put it back car ready 2 drive key still in ma pocket.....! ne1 know if sum how its bye passing the ignition?
 
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