Roof not working.....but odd one.

Information and general chat about the Megane II CC.

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Fourelms
Posts: 1
Joined: Wed Feb 26, 2020 2:56 pm
Currently Drives:: Megane CC

Roof not working.....but odd one.

Postby Fourelms » Wed Feb 26, 2020 3:11 pm

Hi guys, fantastic site here, really hoping for some help on this problem.

56 reg Megane CC.

Roof been working fine, not used for over a month, went to drop the roof and nothing, no error messages on dash, just nothing, no response to the roof switch.

I've removed the switch and cleaned wiring contacts with Servisol, no joy. Switch action feels ok. No wiring diagram to check inner switch fuction.

Roof/horn fuse checked and also the side mounted 40 amp fuse, both ok.

Windows all working on global switch by side of roof switch, and individually.

Boot locks and unlocks ok.

It seems the car isn't even seeing the instruction to commence roof opening?

BSI (uch) is dry, scuttles draining ok so no flood issues.

Questions, I have many but...

Does the uch control the roof, or is it all controlled by the roof control module under the hydraulic pump in the boot?

I've checked the boot flap microswitch and all fine, but if this was an issue I would be seeing error messages on dash.

Does anyone understand the control logic for the roof opening sequence.....?

I'm wondering if I use a voltage probe on the 40 amp fuse would this be of any use...I only mention as I think I saw a thread once about remote roof operation by live feeding this fuse, maybe I dreamt it?

Many thanks for any help here.

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