Technical Car has own mind - opens boot randomly

[mihalko]

Hi there, so I am another proud owner of Fiat Stilo
I have the car around 6 months now and recently, I changed clutch. After that my bonnet started to open when I shutdown engine, or unlock doors. Once it happened when I sat down into the car. Also, .Follow me lights are turning on at the same time. It is not happening allways, it is mostly random.
Should I suspect wire problem - bad ground or is it CAN related problem? What you think? Where should I start cchecking signals? I allready disconnected battery overnight, checked ECU ground, checked and cleaned D4 connector. Thanks!

 

[mhowse]

Do you mean Bonnet at front or Boot at rear. ??

I do realise your from Slovakia and language problems translating and only reason I ask is a car with an electric locked bonnet is a new one to me more so on a Stilo

 

[mihalko]

Uff, yes, I mean boot. Sorry. I thought bonnet is also name for "boot doors".
I wish I could change title and first post.. Could you, admin?

 

[mhowse]

ok .just checking before go putting my foot in the big puddle..

Have you tried testing the rubber boot switch, they do go bad with water ,,if it is faulty, you can replace the micro switch on circuit board if it is faulty and ou are good with soldering iron other wise find replacement when my switch went bad it started opening by itself for no reason firs,,t before stopping working all together, I just changed the micro switch on the circuit board of the switch but you could test it first using an electric multi meter to see if it works or not may even just need cleaning with some contact cleaner spray.,,not sure why the follow home lights are coming on as well

 

[mihalko]

Hi, I have updates. Boot opens also when I push handle for Follow me lights. It opens when doors are unlocking. At the same time, bottom light on left front doors is on. Looks like few cables are shorted or ground is bad.
I chcecked cables around bonnet release handle and found one cable cutted. I have enclosed picture where is it connected on other side. Can you tell me where it should be connected, please? Is there any software or online page, where can I found schematics for Stilo? Thanks guys!

 

[mihalko]

Light on right front doors, right!

 

[Hurrican]

Hi.

I have the same problem.
It is a 2003 1.6 MW. Did you solved the problem since June?

What I made it is just a temporary solution but it is not going to open randomly if you switch off the "Ind Boot" function in the computer setup. So open the menu of the computer than try to find "Ind Boot" option and switch it off. With this when you open the car with your key the bonnet will not open but you can do it with your key remote button.
I think the same it is a wiring problem somewhere but where.

Gábor.