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PostPosted: Wed Mar 25, 2020 2:43 pm 

Joined: Thu Jul 12, 2018 4:06 pm
Posts: 6
Car Model: Saab 9-3 1.9TID Convertible
Hi Guys,
The roof, has been until now one of the few things on my Saab that hasnt gone wrong or needed replacement... Until about a week ago :(

If I try to put the roof down, it will do most of the cycle, right upto where the roof is sitting in its folded position and the rear cover is suppose to come back over and lock into place. At this stage, (most of the time) this is where it gives up and says the old 'Manual oporation only', occasionally I can coax it into compleating the open cycle but then I have all kinds of electrical gremlins start to happen.
- Information asks for the cycle to be complete even though it has, locked in place and dropped the windows it Ive held the button for the roof long enough
- When putting the windows up, they judder and go up in steps (kinda like a temporary loss of electric to the window motors)
- The heating / aircon changes it setting speed and aircon light flicks between on and off randomly
- Outside temp reading on the dash was about 15 degrees higher than it was, fell to correct reading when moving.
- Constantly complains about compleating the opening cycle before driving (even though it has).

When I finally get the roof back up and locked into position (sometimes under its own power, sometimes I have to do it manually), these electrical faults do not appear and the car functions as it should.

I have checked the battery, the relivent fuses, the hydrualic level in the boot, wiring in the boot for the roof as best I can, lubricated everything and nothing has changed. I'm assuming its an electrical issue somewhere as mechanically everything works as it should (sometimes). I was wondering if it could be water ingress into some connection or a faulty sensor giving me grief ?

Any ideas ?

PostPosted: Wed Mar 25, 2020 5:26 pm 
Full Pressure Turbo
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Joined: Wed Apr 15, 2015 9:22 pm
Posts: 952
Location: East Dorset
Car Model: 9-5 9-3SSx2 Sonett T16S 9000
It sounds like a sensor fault on the roof is the main reason for the faults. These are very difficult to detect without a Tech2 session, but someone who has had this problem might suggest which sensor to look at.
Our windows judder, I was expecting to have to realign the channels in the door, but a bit of silicon spray on the edge of the windows worked well last year. They haven't juddered since, but may soon.
It is a judder not a stop start.
Heating and a/c goes nuts if it doesn't know what state the roof is in. It might be getting an intermittent signal from the roof module.
I haven't seen a 15 degree difference in the outside temp, but have seen 5+ difference due to heat soak from the engine/rad.
The complete cycle before driving issue is probably down to the sensor fault.
Have you confirmed there is nothing in the boot and the panel drops freely?
Generally, Tech2 will find the issue, but I am thinking it is something around the back of the car, if you say when it is up the errors disappear.

PostPosted: Thu Mar 26, 2020 8:08 am 

Joined: Thu Jul 12, 2018 4:06 pm
Posts: 6
Car Model: Saab 9-3 1.9TID Convertible
Hi, thankyou for the reply, it really is appreciated.

Yes, 100% fault free when the roof is back up. (well, its a saab, so those particular faults listed :) )
I was having a good look yesterday, and it seems that as the roof is completing its folding that it either doesnt fully sit down as it should (although this might be in my head, and if not we are talking milimeters) as its right at the point where the rear panel should lift up to cover the roof. its almost like the car thinks that part of the cycle hasnt completed.
Frustrating this is its not at this point everytime it fails, sometimes its at any stage the rear is covering itself or, as yesterday, it comleted its cycle but reported back that it hadnt.
Must admit that the electrical gremlins really are bothering me as my non mechanic brain fail to understand the corolation between a faulty boot sensor (should it be that) and the air con / windows etc as yes I understand they are all tied into the roof with sensors, but so is the radio and tahts unaffected.

The boot is totally clear of anything that could be an obstruction, everything has been lubricated, there is no frayed wiring or hydrualic leaks that I can see. I was really hoping that with all that rain we had that maybe a module or wiring loom had water ingress or something along those lines that would explain the behaviour.

As for the Tech 2, sadly I live on the Isle of Wight so chances of finding that without hitting the one and only vauxhall dealer over here is unlikely.

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