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

If you need help with your C3 Pluriel, that seems specific to the Pluriel (like the roof), ask here. Engine and Transmission problem must be asked in the relevant topic for the problem. The Pluriel shares the same Engine, Gearbox, Brakes and Transmission as the other C3 models (see above for the correct section).
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Questions about the Pluriel Roof system can be asked here
No engine, gearbox or running gear questions
Think: Pluriel roof and rear window jobs
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My Name: matthewnewbrook

Member
Posts: 2
Joined: Sat Mar 05, 2016 5:40 pm
Model: C3 2002-2005, Original shape model
Year: 2005 (55)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 106000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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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
ecu3.jpg
burnt out ECU
burnt out ECU
replacement ECU
replacement ECU
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My Name: C3driver52

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Posts: 1854
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
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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.
My Name: matthewnewbrook

Member
Posts: 2
Joined: Sat Mar 05, 2016 5:40 pm
Model: C3 2002-2005, Original shape model
Year: 2005 (55)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 106000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

Post

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
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My Name: C3driver52

Guru
Posts: 1854
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Has thanked: 85 times
Been thanked: 65 times

Post

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 :)
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