Site News - 11/22 Member of the Year Voting
Date: 23 Jun 2006 03:56:40 -0700
From: "Izodmartin" <izodmartinnospaml.com>
Subject: Re: 94 9000 cse Shift light in 5th Why?


Colin Stamp wrote: > On 22 Jun 2006 17:31:11 -0700, "Izodmartin" <izodmartinnospaml.com> > wrote: > > > > >Craig M. Bobchin wrote: > >> Hi, > >> > >> In all my years of driving Saabs, I've never seen this one. My '94 CSE > >> has reently started showing some very strange behavior. When I'm > >> cruising in 5th the shift light comes on. I'm pretty certain it is a > >> switch somewhere, but I don't know enough to know what switch nor how > >> hard/expensive it is to replace. Any ideas? > > > >This is actually a very bad thing. Shift light in 5th gear means the > >computer thinks you are still in a lower gear and most likely you are. > > What is it that makes you think it's "most likely"? I would have said > it's *extremely* unlikely that top gear could be un-selectable in such > a way that the driver could be fooled into thinking it's still > working. > > >The reasons are: > >1) transmission linkage is "off" and you are not in 5th gear even > >though the shifter is(most likely) > > It's virtually impossible for the driver to fail to notice this. > > >2) clutch going bad and failing to disengage in higher gears (maybe) > > Again, a clutch slipping to this extent would be really obvious. The > OP would have mentioned it surely? > > >3) faulty computer (very unlikely) > > I can't imagine the way in which it might be faulty to cause the > reported symptoms and no others. > > > There's only two ways the system could tell whether the gearbox is in > 5th or not. > > 1. Comparing road speed with engine revs - If this was the case, the > reported symptoms would be accompanied by others. The speedo or the > rev counter would be wonky for example, or the clutch would be > slipping badly. > > 2. There's a "5th" switch on the linkage just like the reversing light > switch. Failure of this switch or it's wiring would cause exactly the > fault described. > > Cheers, > > Colin. Hey Colin, I marked it very likely because we just said the same thing " The linkage", weather it is off or a bad switch. So take a chill pill dude.

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