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#1
07-20-2006, 05:17 PM
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PCM schematics
Is there a way to get the schematics of the PCM? In the service manual, the PCM is just a black box, but I'd like more detailed information about how it works.
Has anyone ever attempted to repair a PCM? (Part #16183247) 
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#2
07-20-2006, 07:22 PM
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Re: PCM schematics
The powertrain control module is made up of two components--the PROM chip (I think that is the name) and the computer itself. The computer is often interchangable with other cars, but it is the PROM chip that contains the information for that specific car.
As far as tearing into one and repairing it, I would say you won't be able to do this unless you happen to be an excellent electronics technician....and could solder really really good. I'd say your best bet would be to just replace it with a PCM from a wrecked car....you want one from a wrecked car becuase you'll know that the car was actually running when it was destroyed 
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-Eric 89 LeSabre T-Type: CAI, STB, F41 Suspension, Moog Ball joints and tie rods, dual-out flowmaster and dual tips, Pointiac CD HU, Delco type 2 Ignition, etc. Basic H/C body info:http://www.3800power.bravehost.com/index.htm http://www.cardomain.com/ride/2318168
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#3
07-20-2006, 09:10 PM
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Re: PCM schematics
I would have to assume that they do not have that many "wrecked" 1994 PA'S in Switzerland. In addition, keep in mind, the 94 PA could be OBD1 or OBD11 compliant. If it is OBD1, the prom would apply, if it were OBD11, the PCM would not have a prom. If you technically proficient to the component level on computers, then yes, you can make repairs. If not, forget it!
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Knowledge can be communicated, but not wisdom!   
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#4
07-24-2006, 12:48 PM
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Re: PCM schematics
The 16183247 is a OBD-I PCM. It does have a PROM. It's used in a wide variety of applications: http://www.cruzers.com/~ludis/p4xref.html#16183247
If I had the schematics, I'm positive I could fix it. I have a pretty good background in electronics, and the PCM technology is actually pretty simple compared to what I'm used to. After all, it's basically a 12 year old microprocessor system. Without schematics I agree, it's pretty difficult, if not impossible. Especially because there are some non-standard IC's on the PCM. 
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