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Is there a link to this on-line? If so, please share..
Would like to share this but some sites dont allow links to "other" forums..

Thanks
It is a PDF file on DP, in the Other Reference Manuals section here: [url="http://www.dieselplace.com/forum/63-gm-diesel-engines/21-6-5l-diesel-engine/53309-6-5l-faqs-master-list-information-6-5-answers.html#post7233786]Manuals[/url]

You can download it and upload where you want to share.

I would post the file, but I am on my iPad.
 

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Discussion Starter #71
It is a PDF file on DP, in the Other Reference Manuals section here: Manuals

You can download it and upload where you want to share.

I would post the file, but I am on my iPad.
Now why didnt I think of that.. Thanks....
 

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Discussion Starter #73 (Edited)
GM vehicles. Quad driver fault; is the computer really the cure?

Our OBD1 and OBD2 operating systems employs all 3 variations of QDR

Near the bottom is an oversimplified illustration of how the ECM employs QDMs.
If you were to add another (seperate from) ECM unit with a couple of its own QDRs to that illustration, that 2nd added ECM would represent our PMD.

Dot.....
 

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Discussion Starter #74
How the Engine Control Module Works

Engine Control Module: The Brains Of The Operation
"When an engine control module fails, it may or may not set any Diagnostic Trouble Codes (DTCs). This can make troubleshooting difficult and often results in misdiagnosis of a bad computer. Often the real problem is outside the computer such as a bad sensor, wiring fault, power relay or voltage issue. Complete module failures are rare, but failures within the module’s various subsystems and memory are more common. A shorted fuel injector, for example, may overload and burn out the injector driver circuit within the engine control module. If the underlying cause is not found and fixed, it can cause the replacement computer to fail, too."


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