Clio II UCH BG immo problem

[carsandkeys]

I have a clio 1.5dci with UCH BG with immo problem. the cars dont recognize the keys 9/10 times. I cloned the in another UCH with same ref P8200065817--A G1 V4.1. With this UCH the cars start, remotes work, all ok. but After a while, the immobilizer light stays on steady and the starter motor does not rotate. If I disconnect the battery and reconnect it, the car starts normally.

[CHIKO]

hi check your ecu power +12 and gnd it is a problem on ecu not uch

[kophiphi]

Hi there,

Check the fuse box in the motor room! There's a big white connector under the fuse box. This connector can get water so the pins will be oxidated.
By the way ecu problem can be too.

[carsandkeys]

I will check fuse box and relay. i dont know why when i disconnect and reconect battery this start if problem is in a fuse i hate renault...

[t77]

Hi take the Clip and while error is active (do not disconnect batery),check all parameters in UCH and ECU like +12v after igintion key recognized and etc

[carsandkeys]

I dont have comunication with ecu, I enter in UCH and see dtc between key and immo, i deleted the dtc and cars start and now i have comunication with ecu. I will wait a time and check...

[carsandkeys]

Nothing, after a while the immobilizer light stays on, it enters the immobilizer, I erase failures and it starts again and works correctly...

[drz]

The problem is burnt relay in engine fusebox, which gives +12V from ACC to ecu and because of that you have no communication with ecu and steady red immo led on dash.

[carsandkeys]

Solved, not is relay burned because i check this, the problem is on the wires that go into the relays, if I put my hand under the relays and move the cables the car starts. there is a cut cable. Thanks to all