Passenger Seatbelt Light stays on Log Out | Topics | Search
Moderators | Edit Profile

FerrariChat.com » Technical Q&A Archives » Archive - May thru December 2001 » Passenger Seatbelt Light stays on « Previous Next »

Author Message
Ben Lobenstein 90 TR (Benjet)
Posted on Tuesday, May 29, 2001 - 12:32 am:   

After seeing the pic of the cover I'm almost determined to find me one (or a copy thereof). It just amazes me the amount of documentation that is out there (and that I wasn't aware of)...any ideas where to find this (and while I'm at it, the 509/88 wiring diagram too)....

Also after looking thru the WSM (I hadn't really searched for anything on the seatbelts) and confirming that there is NOTHING in there about them, I wonder where the system/motors are fused?

-Ben
Steve Magnusson (91tr)
Posted on Monday, May 28, 2001 - 1:13 pm:   

James -- the locations of the seatbelt ECUs are not shown on the that cover (only the motor assemblies -- I'm not sure what the simple box represents). I'll try emailing some more info directly to you.
James Pai (Jaymus)
Posted on Sunday, May 27, 2001 - 2:08 pm:   

Hey, Thanks Steve!

That jpeg kinda shows me where the 2 units are (ECU/Motor) etc.

Maybe I'll go in there sometime and see what the dealer did, I am sure Ben is correct, they probably just disconnected the ECU. I am hoping it's just a connection problem in the unit in the center tunnel.

I'll clean my tracks and clean up contact points when I get to it and keep you all posted.

Thanks!!

James
Steve Magnusson (91tr)
Posted on Sunday, May 27, 2001 - 1:44 pm:   

James -- Just wanted to warn you that the TR WSM doesn't seem to have anything on the motorized seatbelt system. In early May, "nwlitman" was selling an Electrolux manual on eBay titled:

2 point motorized belt system
Servicemanual
Ferrari Testarossa

There's a jpeg of the cover at:

http://albums.photopoint.com/j/View?u=972829&a=10846708&p=49266591

Unfortunately, nwlitman didn't list a XXX/YY print number (and I don't know if it even has one). "autohistorian" was the last high bidder I saw.

I did have a look at the US version TR wiring diagram (509/88) for Brian Buxton a while ago when he was having some trouble on an '87 in this area and wanted to diasable the system -- I couldn't find any convenient fuse (or surprisingly any fuse for that matter) so I think the best way to disable the system is to unplug the two seatbelt ECUs in the central tunnel as Ben mentioned.
James Pai (Jaymus)
Posted on Sunday, May 27, 2001 - 3:19 am:   

Thanks, Ben.

I didn't read this before I sent you the e-mail.

I'll clean the tracks and everything like Michael sugguested then maybe look at the ECU if someone can point me to the location. I think the dealer just disconnected power to it or something.

I am trying to isolate the problem with you guys help.

Thank you all for being so helpful.

James
Ben Lobenstein 90 TR (Benjet)
Posted on Saturday, May 26, 2001 - 4:46 pm:   

In my case it seems the misallignment has not fallen or dropped out of place (that would make it further DOWN from the track), the problem is that forked flat pin has shifted slighty inward (away from the door edge) and angled slighlty (so I've been told), I haven't examined it fully. As long as I can tap it into place I'm ok with it. I haven't taken too much interest in it, as it isn't bothering me too much yet. I have been instructed that the interior panels that need to be removed in order to "tighten things up" are a labor intensive job to remove and replace, something I'm sure I can do myself, given the right time and effort. As to the actual reallignment there MAY be shims/washers either in my way (or that need to be added to the other side) in order to get the angle just right, or it could just need tightening.

If in your case it has "fallen" maybe something can be wedged or more tape applied in order to make it work, until it happens again....As you can see these seatbelts are a MAJOR PITA (Pain In The Arse) for some. While I'm not usually a promoter of band-aid solutions to fix problems, in our cases we should feel lucky they work at all (or as well as they do).

Let us know as the situation progresses.

-Ben

PS. to James,

There is no switch for the belts (that I know of, SteveM correct me if I'm wrong). There are 2 independent Electronic Control Units for them, it usually these that go bad. I'm sure there are fuses for these but I haven't gone to look, I can if you'd like, but I'm not sure what good that would do? Let me know.....
Craig Dewey (Craigfl)
Posted on Saturday, May 26, 2001 - 2:55 pm:   

I'm not sure if everyone knows about this trick so I'll repeat it--- If you ever need to glue something in place very securely, try using the super glue/baking soda mixture. A dab of super glue, then sprinkle baking soda unit it changes from translucent to baking soda white. This makes a hard compound that is secure and lasts! Just remember when the baking soda hits the super glue, it's PERMANENT and can't be adjusted. (Of course it could always be chipped off, but that will be a pain.) You can build this mixture up and fill areas as well as bond just about anything...
Michael A. Niles (Man90tr)
Posted on Saturday, May 26, 2001 - 1:49 pm:   

Found the problem.

Ben, you were correct about contact with the end. At the very end of the track, where the little forked flat pin sits, that section has slipped about 1/8 of an inch and there is now a small space between the piece that holds the forked pin and the end of the track. This slight misalignment is causing the locking mechanism to not "push" down the small pin and turn off the light, even though the belt is locked in place.

I can tell this has happened before because there is a strip of black tape there where the former owner or a mechanic has resecured this piece. And it evidently has now slipped again. The fix seems to work fine because I have had the car for two years and this is the first failure of the system I have had.

I will investigate and see if i can simply realignment and resecure that piece to line up with the end of the track.

Any suggestions.

Michael
Michael A. Niles (Man90tr)
Posted on Saturday, May 26, 2001 - 11:53 am:   

Ben,

I am aware of the "tap". I have to occasionally do that to the drivers side belt. When I first saw this the first thing I did was tap on the connector to make sure it was down completely in the housing.

It has been a couple days now and I will go back and check the system carefully. Thanks for the ECU info.

Michael
Ben Lobenstein 90 TR (Benjet)
Posted on Saturday, May 26, 2001 - 10:00 am:   

Rather unforunately I am blessed with the problem in just about every car I normally drive (the mousetrap seatbelts), both my daily drivers (non Ferrrari) have them. While I do not think I have built a better mousetrap (pun intended), they do function properly for the most part, without modification.

And just FYI on the American vehicle with them I have had problems with the system before, the dealer did fix them (repeatedly) under warranty.

-Ben
James Pai (Jaymus)
Posted on Saturday, May 26, 2001 - 5:50 am:   

Guys, is there a fuse or switch that disables the system? My belts were intermittently getting stuck mid track and sometimes it functions. I suspect a bad connection somewhere. Can someone enlighten me on where the switches/fuses are?

I asked a dealer about the problem, and they just said it's common and to replace the whole system/track and all, $4K...

So I told them just to disconnect it and put it in the rear position.

$4K, I can buy racing seats and manual belts, why would I pay that?!?!

Anyhow, if it's something like a contact problem, I like to fix it myself if someone can point me to the locations. Maybe I can clean up the track and contacts, hopefully it will work.

Man, I have to get a shop manual.........

Thanks

James
Ben Lobenstein 90 TR (Benjet)
Posted on Saturday, May 26, 2001 - 2:43 am:   

Time for me to hit the obvious first again..... When you say locks in place are you SURE that it's making contact with the sensor that tells the seatbelt ECU that it IS locked into place, it's at the very end of the track. Mine occasionally doesn't and needs to be "tapped" to be convinced that it's in the right place (there is a proper solution to this, that well, I haven't bothered to do yet). Look VERY carefully at how the good side does it to understand the side with the problem.

If you suspect for any reason either of the seatbelt ECU's swap them and see if the problem follows. The ECU's are mounted in the panels along side the footwells, in the center console (basically behind the gas gauge and clock) they aren't too terribly difficult to get to but they are a pain to put back (the panels).

Let me know if this helps.

-Ben
Michael A. Niles (Man90tr)
Posted on Friday, May 25, 2001 - 11:28 pm:   

My passenger seat belt works well except yesterday the passenger warning light started to stay on. The motor operates well and tracks smoothly and it locks snugly in place in the rear position. Is there a fuse or relay that is inoperative that I can change? I cleaned the track and the rear housing so it is not a dirty connector. Any suggestions welcome.

Thanks in advance.

Regards,
Michael

Topics | Last Day | Last Week | Tree View | Search | Help/Instructions | Program Credits Administration