Date: Tue, 27 May 2003 01:35:56 GMT
From: "Bill Jackson" <>
Subject: OK, Strange trunk problem on 99 9-5

A while back, I had the dealer play with the computer controls on the car to change a few things for me, like the car now locks the doors when I start moving, unlocks all doors when I take the key out and the little switch on the center console no longer takes two pushes to unlock all doors but does it on one push. A couple of other minor stuff. After this, I've had this strange behavior with my trunk. If I move the car to the point where the autolock doors activates (2.5MPH I think) WITH the trunk open (like say I'm in line waiting for someone to put something in the car) things go wacky. OK, so now I close the trunk and start to drive away. When I get to the autolock doors speed, the doors lock and the trunk opens. I stop, shut the trunk, drive again and the trunk opens. Now, I can reset this by shutting the trunk, pushing the open trunk button on the door which opens the trunk, go shut it again and all is well until the next time I move the car with the trunk open. I took it back to the Saab dealer and asked them to fix it since it didn't do this prior to them touching it, they told me that my that the computer module was bad and that it needed to be replaced. I told them that (1) this is a firmware bug of some kind and (2) that for the $1Kplus to replace it, I'd live with this tiny little problem It appears that there is a two-state memory of some kind in this thing and that the trunk latch is a "toggle" style control (ie: hit it once to open, hit it again to lock?) I've scratched my head on this one and looked at the wiring diagram to try to figure it out. There is a trunk unlocked indicator that flows into the computer and the indicator is working correctly because when it unlocks the trunk in "weird mode" the light comes on indicating the trunk is open. Any clues?

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