albertros (8th November, 2018), alclot (15th October, 2018), Fresk29 (17th February, 2018), Louislesinge (30th November, 2017), martinracing (4th December, 2017), McDowell (1st July, 2019), racin-snake (4th February, 2018)
I People
I dont know if exist any thread about UCH repair and replacement
Old versions like Sagem BG or N?1 are not available any more
S? any one knows any source to buy it ?
wicth version is use now for replace old ones
About repair , i see that major problems are solders in PCB parts , not in connectors
Newbies , wend you want any pass , send PM to the guy , don"t span the thread
Last edited by mexanico1971; 20th November, 2023 at 02:30 AM.
My work is my life ART TECH GARAGE
albertros (8th November, 2018), alclot (15th October, 2018), Fresk29 (17th February, 2018), Louislesinge (30th November, 2017), martinracing (4th December, 2017), McDowell (1st July, 2019), racin-snake (4th February, 2018)
Hi,
BG can be replaced with N2, HG replaced with N3.
N3 will replace N2.
N1 seems to only like N1
Not complete list but a start.
alclot (15th October, 2018), dt200 (28th December, 2017), Louislesinge (30th November, 2017), Manuelgb (28th October, 2018), martinracing (4th December, 2017), mexanico1971 (15th May, 2017), Stelaras26 (19th November, 2019), titoarg (1st November, 2017)
Thank"s for your input
So if BG can be replace width N?2 why does N?2 have delay after turn key off ?
I mean I switch off the key, and take it out of the ignition, and engine only 4 seconds later shot off ?
Any idea ?
I coded UCH width Clip
Thank"s in advance
Brs
My work is my life ART TECH GARAGE
Hi, after UCH replace do a ECM reprograming and all will be ok, dont know why but worked all times for me.
Best regards
mexanico1971 (18th June, 2018)
Solder all caps etc. under black 40 pin connector. Solves 99% of UCH faults.
Also, for your own reference, from a good UCH measure all components to PCB GND under the connector and write all values down. Will give you an idea if a component or something connected to it is not right. Will save you hassle of removing connector more than once.
Last edited by Dunker; 26th November, 2017 at 01:18 AM.
V Series TMS470 / EEPROM data - encryption / decryption, totally pwned.
IEC 62056-21 - new discussion: sonsivri.to/forum/index.php?topic=60412.0
albertros (14th December, 2023), alclot (15th October, 2018), Louislesinge (4th February, 2018), McDowell (28th June, 2019), Meat-Head (15th November, 2018), mexanico1971 (6th February, 2018), PierreTheron (7th March, 2020)
Hi,
What I can tell you is I've change about 50 UCHs in my life, most of them with original parts, and a lot with used parts.
You can allaways change Nx for a same grade or higher (N1 instead of BG, N2 instead of N1 etc).
Another speciall thing is if you got a Clio with engine 1,9 DTI, it needs to be the same UCH because of the antitheft. No other UCHs works for antitheft instead of the original: it happens to me twice ( red light stays on without flashing, it means no comunication UCH=>ECU) and I did not find another solution than removing antitheft from ECU 0 281 010 788 .
I've tested virgin, copying, all desperate things you can do.
I think this kind of ECUs have a special protocol.
Regards,
Last edited by Louislesinge; 17th October, 2018 at 08:32 AM.
dt200 (28th December, 2017), martinracing (4th December, 2017), mexanico1971 (17th March, 2018), PierreTheron (30th December, 2017), runtronics974 (26th May, 2018), Stelaras26 (17th September, 2022)
Hi,
By the way I order an UCH to replace BG P8200065817 G1 V4.1 , the replacement from Renault was 82 00 621 763 written N3 instead of BG.
Regards,
mexanico1971 (26th October, 2018)
Hi,
For the same UCH BG P8200065817 G1 V4.1 pulled up from recycle.
Antitheft light blinking permantly, does not reconise or even see any key i tryed (tested reset and another antena etc).
Tested continuity beetwen pin8 Black connector 40 ways and SAGEM E34707A OK (near the same connector upper right side, no contact to earth.
Tryed to replace the chip SAGEM E34707A from another working UCH: Now works fine, can learn the keys again, car starts.
If some needs electric diagram:
IMG_20180203_210759.jpg
Regards,
Last edited by Louislesinge; 4th February, 2018 at 04:24 PM.
alclot (14th October, 2018), Col19 (18th November, 2019), karim07 (16th February, 2018), KCSS (26th April, 2019), key90 (25th May, 2021), laurentiudania (13th December, 2019), line44 (7th March, 2023), mexanico1971 (6th February, 2018), PierreTheron (7th March, 2020), runtronics974 (26th May, 2018)
Hi.
I found something and repair this uch without them come back to me.
It take me a lot of nerves to find this but I wanna to find what can be done and after that solution I repair more then 10 uch and cars work more then 3 years without problems.
If someone need this ask on pm for password.
I use picture from 1 post of mexanico1971 .
And my picture high res. to see how it`s look after repair.
Soldering is not my best work but in late nihgt hour when I work this can pass.
Regards
Last edited by tomo776; 20th February, 2018 at 09:08 PM.
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Hi tomo,
I'm interested in your investigations, please send PW.
Regards,
Hi,
Ok tomo, i'll try to follow the electronic circuit to understand.
You don't say which problem this change solves: antitheft light staying on or flashing, etc. Those are for me the biggest problems because many times they are sporadic. The last one i save changing SAGEM E34707A, was permanently inoperative, a kind of breakdown easy to fix.
Regards,
Problems is
Car does not start,electric window problem, lights dont work etc.
Car going crazy and sometimes when you pull wiring of uch car work ok but this fix this errors.
First is sporadic that car does not start and problem with electric in car but then fail to start after some time.
This fix if car start doing this with no reason.
If someone change batery and reverse polarity mix + and - this is not fix for this.
And if some part inside uch is burn for some reason.
Last edited by tomo776; 20th February, 2018 at 10:11 PM.
Louislesinge (21st February, 2018), McDowell (1st July, 2019), rochinha75 (16th October, 2019)
hi
Why i cant download tomo776 post attached links
non apre il rar file dannegiato
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