Date: Wed, 29 Oct 2003 17:27:44 +0100
From: Michael Limpinsel <michael.limpinselnopsamcom>
Subject: Re: 9000 speedometer probs


Goran Larsson wrote: > In article <bnocj4$866$1nopsam1.wdf.sap-ag.de>, > Michael Limpinsel <michael.limpinselnopsamarkets.com> wrote: > > >>On–ly one problem is left: during the first couple of kilometers the >>speedometer works, then it begins to >>falter and finaly stops completely. > > > I have not heard of a speedometer failing in this way. Is it only > the speedometer that fails, or do the odometer, trip meter, and > cruise control also fail at the same time? > > In the 9000 of you cars age the speedometer consists of the following > parts: > > * A transducer mounted on the gearbox. The transducer is like a small > generator producing a voltage with a frequency proportional to the > speed of the car. The small gear inside the gearbox that drives the > transducer can fail, but I think that this type of failure should > be fatal, not working for some kilometers. The transducer can be > unscrewed from the gearbox and tested by spinning the input shaft. > The speedometer should react to this. > > * Wires between transducer and speedometer housing. > > * Circuit board inside speedometer housing containing an electronic > circuit that drives the speedometer dial, and a small stepper motor. > Also provides a signal for the DCC computer (if fitted) and cruise > control (if fitted). I had one 9000 '88 with a failing speedometer > caused by a bad solder connection on this circuit board. > > * A small stepper motor driving the odometer and trip meter. > Hi Goran! Thanks for Your quick help. Beneath the speedometer the trip meter (day and total) are gone when the instrument finaly fails. the consumption (l/100km) is counting increasing values (60l/100 km already:-))) I will first check the electric connections and perhaps try to unscrew the transducer from the gearbox for more tests. br michael

Return to Main Index

The content on this site may not be republished without permission. Copyright © 1988-2018 - The Saab Network - saabnet.com.
For usage guidelines, see the Saabnet.com Mission and Purpose Page.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]