roof fault, fixed wires changed ecu now what?? nothing works

i have just purchased a c3 pluriel so i do not have a history of the roof or when it was last working.


i have managed to find a couple of faults with it so far,
1 the wiring around the boot hinge had split, so this has been repaired.
2 the ECU had burned out.

i have sorted the wiring out this has now allowed the bottom boot to work but nothing else. i have purchased a 2nd had boot ECU off the internet and been assured that the item works fine.

after installing the new ECU nothing worked, even registered that the glass was open and was unable to lock the vehicle, after disconnecting the battery and doing the "reset" i was able to lock the vehicle but nothing else worked, even the lower boot had stopped working.

thats the history of what has gone on.

so my question is what else do i check?

does the ecu need to be programmed, if so how? it was off a 2003 I'm running a 2005

ECU faulty?

stuck for ideas now.

thanks matthew

Hello matthewnewbrook, welcome to the forum. Thanks for the pictures

matthewnewbrook wrote:thats the history of what has gone on.

so my question is what else do i check?

I would have tested the wiring for shorts while the ECU and BSI were disconnected to prove there were no other shorts on the wiring before attaching a good ECU. I wouldn't want to have 2 damaged ECUs.

If you have damaged wiring, it would be important to find out 'why' the wires got damaged. If it was overcurrent due to a bad motor, then change the motor.

The other thing I would do is connect up the Lexia tool (click for the topic) and not an OBD reader.

You can use the lexia tool to check the configuration options of the car (that its configured as a 3 door) and check the signals from the roof are being received at the BSI.

matthewnewbrook wrote:does the ecu need to be programmed, if so how? it was off a 2003 I'm running a 2005

I don't think it does need programming, but if it did, you need the lexia tool that I mentioned above.

hiya, thank you for your quick reply,

the wires were damaged by the boot opening and closing.

as for the circuits being in tact with no shorts i am struggling to find the same use box on my car that is posted on here,they look completely different.

so I'm a little lost as to what I'm actually doing, if it was a simple fix i would have attempted it, but think i would need to pay someone to look at it.

anyone near Coventry

matt

matthewnewbrook wrote:hiya, thank you for your quick reply,

No problem.

matthewnewbrook wrote:as for the circuits being in tact with no shorts i am struggling to find the same use box on my car that is posted on here,they look completely different.

Its a common mistake and quite easy to look a bit more at the pictures. The fuse boxes on the pluriel of any year match the fuse boxes of a 2006-2009 C3. Have a look at the fuse box location topic for the correct location of the BSI fuse box on a C3. There is lots of scrolling, but you will get to the right picture eventually.

matthewnewbrook wrote:so I'm a little lost as to what I'm actually doing, if it was a simple fix i would have attempted it, but think i would need to pay someone to look at it.

You can get lexia if you want to have a go, but there is only one pluriel roof specialist that I am aware of and they are https://chevroncitroenspecialists.com/, be sure to mention us if you contact them