Anyone have a link, brief overview, or flow diagram concerning the electronics on the 24 valve Cummins engines?
Specifically listing all sensors/digital inputs and functions?
It would be a great help to everyone if you did!
Thanks!

 

What is it your trying to do ?
The factory wiring diagrams are a pain , a single circuit may be lade out on many pages .
I am not a fan of Chilton manuals , but they do lay out a wiring diagram well .
Some one should come up with something soon .

 

Following a wiring diagram is not what I'm after.
Functions of sensors/inputs etc to the ECM, how they affect the FCA (fuel control actuator) on the fueling injection pump, etc.
I.E. thinner air will shorten the fuel injection curve - how much and how long the fuel is injected.
The whole idea is to understand how the system works, not necessarily how it is wired.

 

Thats a whole different animal , are looking for specific to your truck or general theory ?
More complicated answers , require more involved questions .
Are your looking modifying , or just understanding , again your truck ?
There 2 approaches , fix stock systems , is more of a memorization of spec.s , learning buy wrote , your question as stated implies that you are looking into theory / engineering , thats much more than can be handled here , but the basics are , like a pyramid in ohm's law , 3 points are #1 the computer has a program that makes decisions based on its program & #2 conditions that the sensors monitor , #3 then the computer works actuators to modify the running of the engine to keep the performance [ not only how it runs ,but emissions ] .
The details of how this all works is what takes yrs to lean to work with .

 

The functions the sensors serve, what actuators are involved, in not only emissions control, but in stock performance mode, all are involved in the software inputs and outputs. That is the information I believe would be beneficial.
I.E. the engine won't start if the crank positioning sensor is not working. It is the beginning point for the timing of the fuel injection. Then there is the camshaft positioning sensor which is also necessary for the correct timing.
A simple flow diagram should be available somewhere I'd think. It would explain the inputs/outputs relationship from the ECM determined by the software.
It surely wouldn't be necessary to get deeply into the software values, just a general idea.

 

Using the internet as a way to give/get info is tricky , we do not know each other , or what knowledge , abilities each other has , so it takes some basic back & forth to get a base to start from .
Definitions are a start , in the context of what we're talking about , functions & sensors do not go together , by functions I mean that the device in question does something / makes changes / turns off & on .
Unlike a sensor it monitors , bad does not produce a function .
But still by your questions/responses , I am still of the idea that that is a much bigger question than can be answered here , I've been in the auto repair buis for 25-30 yrs , and its only been the last 10 or less yrs that I have seen something like what it seems your looking for , that being a 3 dimensional computer graph [ obviously on a 2 picture on a screen ] and that is showing the pattern of sensor & actuators operating .
Again I do not think what your asking is available until the engineering level , witch I would like also , there may be some thing in the teaching automotive end , but I haven't been there in some time .
I you go to the top of the page and click on tech facts there is a small start , giving a list of abbreviations for many terms used for many parts in question , make a copy , because in many of the manuals they will be using these , assuming your know what they are .
Like I said its a big question , somebody may have more of what your looking for , but it would seem to me its a function , or a malfunction of our cultures bad teaching methods , I think what your asking for would work good in automotive classes , but weren't there when I took my last class .
I remember that Snap on had some good books that went with the equipment , but they haven't had much of that for a long [ 1980s ] time .

 

I think I was once after the same thing, however this was on my old 12V...

The trucks service manual will have a page in it under engine control systems and emissions or some other such name that has a block diagram of the PCM
(Powertrain control module) it will show the module as a block.

All the numbered wires in/out of the module connector are labelled as to their function,
eg. TPS (throttle position Control), intake temp, crank position sensor, MAP, etc etc.

These will give you a good idea of what is giving the CPU its ins and outs, form there you just pick one . eg TPS and read in the manual what it does and how it works, after that pick another one and eventually you will tie the electronics together, I pick one go to the truck see where it is located and try to figure out its linkage if mechanical like the TPS, look at others to see location and read about it, it is really not to hard to figure out the sensors and how they work, pretty basic electricity for most of them..

Pick your cruise control and try to figure it out, right down to the brake switch. I did that once when the revs used to jump 200 rpm when the truck hit a bump, the mechanics couldnt find the problem, it was the brake switch.
I fixed it with a bungie cord...

but it did allow me to study everything associated with the cruise circuit...

Pick a relay and try to follow its function.. a good one is the fuel shut off solenoid system, all useless and can be replaced by a good PTO cable that would probably never fail.

Probably some course outline from DODGE would have it arranged in some syllabus type form...??

I have the 24V manuals for my new to me 2004.5 but havent passed the engine cleaning part of my work as yet...
I try to keep the engine cleaner than the inside of the truck so I can see the sensors, wiring connectors, hoses etc when I start to figure it our how it works.
Sounds like you might be a candidate for a OBDII set up to watch your sensors etc and other real time events...

Good Luck..

 

Why don't you start with the FSM?

There's no easy way to get what you want.