electronics are reliable... except the mechanical parts... - Saab General Bulletin Board - Saabnet.com


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electronics are reliable... except the mechanical parts...
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Posted by Snowmobile [Email] (#686) [Profile/Gallery] (more from Snowmobile) on Fri, 28 Jul 2017 14:31:27 Share Post by Email
In Reply to: Re: agree ? no sorry I don't it will be simple to fix !, neil dale [Profile/Gallery] , Fri, 28 Jul 2017 09:22:53
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connections, connectors, switches, pots, etc... are all prone to failure. that's ee 101.

So you look at a car like the 9-5, and common failures are things like "SID Pixels" (it's not the lcd that breaks but the connection to it), ABS/TCS module (intermittent connections result it it not being happy and shutting down, lighting up the dash like an xmas tree), a bad junction in a wiring harness causing O2 sensor codes, temperature sensors "failing" (I can almost guarantee you it is not the thermistor inside, but the connections to it)... TB, DIC, I can go on... even in a c900, electrical connections are common failure points: central locking, automatic windows (switches corrode, wires pinch, motors fail)...

So it is right to blame complicated mechanical things, but as it turns out, electronics are full of complicated mechanical bits, and then if something fails, you often need to go out and buy a whole new expensive module (or at least send them away for rework if one does not have an ee/technician background, which is the case for many people who work on cars).

Now, many of these things we want to have (there were people who hate power windows - would rather roll them mechanically - not me)... but I think some of the stuff going in cars now is almost more of a nuisance than anything... tire pressure monitors can be a pita, and I don't really need real time data on that - if I get a flat, I will know, and otherwise I can check when I'm parked... a gazillion backup cameras and sensors (admittedly useful in cars with poor visibility)... and more so, features that take over driving the car scare me in terms of people becoming over-reliant on them and reacting poorly when they eventually fail...

Basically, I think simple is good. Some electronics are really useful. Others less so. The same can be said of mechanical design. Too many features can make a car heavy, costly, and prone to failure...
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