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561 ECU failure 200 1989

uid 27's pic
posted by  Art Benstein on  Fri Apr 11 11:09 CST 2003
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

That is just what I was looking for, although it wouldn't take anything as large as a TO-220 package to close a 120mA relay, I trace the pin back to the same hybrid used to condition the AMM output, and that makes no sense to me. In the earlier ECUs, the fuel pump driver transistor is discrete and large enough to handle the job and well protected against reverse EMF. I keep thinking I missed a track until I prove it goes there with an ohmmeter. Oh, well, if it is in the hybrid, its fragility is understandable.
--
Art Benstein near Baltimore






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