Technical P0480 - no solutions!!!! Strange fault!!! 3,0 130kw 2011 year

[GMykolas]

The story
2 years ago the engin light fault poped on. And fan started to go all the speed. And it was still on after i turned engine of. And sometimes it turned on and drained battery.
But i changed relay T07, and seemd like it was gone for two years.
Two days ago, it came back..... One more thing. There are no relay T06 on my van.
What i already did:
1) changed relay T07
2) took of fuse box and cleaned it from inside
3) checked fan wirings. All good.
4) changed 2 fan resistors to new ones.
5) changed engine temperature sensor and checked wiring
6) replaced fan relays on fan place.

nothing. ECU still sends signal to high speed fan to turn on, and that moth....ucker goes like craizy.
Lost all faith already....

 

[Communicator]

The story
2 years ago the engin light fault poped on. And fan started to go all the speed. And it was still on after i turned engine of. And sometimes it turned on and drained battery.
But i changed relay T07, and seemd like it was gone for two years.
Two days ago, it came back..... One more thing. There are no relay T06 on my van.
What i already did:
1) changed relay T07
2) took of fuse box and cleaned it from inside
3) checked fan wirings. All good.
4) changed 2 fan resistors to new ones.
5) changed engine temperature sensor and checked wiring
6) replaced fan relays on fan place.

nothing. ECU still sends signal to high speed fan to turn on, and that moth....ucker goes like craizy.
Lost all faith already....

Does 3. include connecion between ECU and relay T07? There is a possibility for wiring damage below LH headlamp. See photo which was originally posted by @Reg 65 .

 

[GMykolas]

Does 3. include connecion between ECU and relay T07? There is a possibility for wiring damage below LH headlamp. See photo which was originally posted by @Reg 65 .

Yes it does, found-nothing

 

[GMykolas]

Hell f.. ck this forums. One real question, one real problem, and no one knows enything.
Why you ever do this? To change bulbs?
To clean windows?
Jus bunch of average knowers of vans who can not drive without asking something...
Have a good days

 

[jackwhoo]

Use the search function for code.
A member recently posted with the same problem and gave information he got from a local garage.

Please don't be rude because you are having problem with your van.

 

[GMykolas]

Done!!!!! To relay T07 there was comming only 10v instead of 12v. There wasnt enought to make relay work!!! Reasembel fuse box, cleaned contacts with sandpaper and here it is. Its working. No threads with this solution

 

[GMykolas]

Done!!!!! To relay T07 there was comming only 10v instead of 12v. There wasnt enought to make relay work!!! Reasembel fuse box, cleaned contacts with sandpaper and here it is. Its working. No threads with this solution

To be real, to rrelay leg 30 there was comming 12v, but to leg 86 only 10v. Bouth legs are on the same mettal plate. So first two times when i dissasembeled fuse box, there was no feeling that it can be like that. So here you are!!!! 7 days of searching and working!!!!

 

[jackwhoo]

You have done great work to find and fix problem (-: I thank you for posting your
Work