Picoscope Waveforms

[AK Bob]

I'd be interested in seeing the output waveform of something like a NOx sensor.

It seems like it would be near impossible to get a stable trigger on.

Another favorite of mine would be to see variances in the IBS (intelligent battery sensor) output, pin 1 orange wire.

Thanks,
-Jake-

Thanks for your words of encouragement; I am still quite new at this and learning as I go.

Unfortunately, my NOx sensor is no longer in service. I did a little research on the IBS module and found it sends data out on the LIN bus (see attached).

It will take me quite some time to learn and get up to speed on LIN/CAN bus systems and protocol, as it’s all new to me.

Thanks for the links you provided in your previous post.

I will continue to post my findings as progress and appreciate any comments and suggestions.

I am having fun and slowly gaining more knowledge as I go.

IBS Operation.pdf


2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, and 50 Gallon auxiliary fuel tank.

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[Electrojake]

Thanks for your words of encouragement; I am still quite new at this and learning as I go.

Unfortunately, my NOx sensor is no longer in service.

I did a little research on the IBS module and found it sends data out on the LIN bus (see attached).

It will take me quite some time to learn and get up to speed on LIN/CAN bus systems and protocol, as it’s all new to me.

Thanks for the links you provided in your previous post.

I will continue to post my findings as progress and appreciate any comments and suggestions.

I am having fun and slowly gaining more knowledge as I go.

IBS Operation.pdf

Yes indeed.

I'm one of the odd ones with a fully stock, emissions-compliant truck (until it breaks).

Thanks for your work on this stuff!

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[Electrojake]

It will take me quite some time to learn and get up to speed on LIN/CAN bus systems and protocol, as it’s all new to me.

I will continue to post my findings as progress and appreciate any comments and suggestions.

I am having fun and slowly gaining more knowledge as I go.

I'm under the impression that you will need to do a packet capture to make any sense of data on the bus.

Plus (it's my assumption), you will need to know the format of the data packet you are trying to decode, i.e., parity, security, data levels, etc...

You have quite the task ahead of you, but I'm extremely interested in how far you can go with that scope of yours.

Please keep us posted, and again, thanks!

-Jake-

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[AK Bob]

Starter voltage and current.

Starter Voltage and Current.jpg


2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit and 50 Gallon auxiliary fuel tank.

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[Electrojake]

Some might say; "what good is that waveform?

It doesn't fix anything."

The answer is: Knowing what a healthy start cycle looks like could prove incredibly valuable when your troubleshooting battery, charging, starting problems.

Like a box of band-aids.



It seems useless until you lay open a finger in the middle of a heater core job and need to finish without hemorrhaging all over the vehicle's interior.

Okay, bad example, but you get the idea.

-Jake-

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[AK Bob]

Agreed, I always say if you don’t know how it works when it’s working, you will never be able to fix it when it’s broken.

In other words, the best time to learn any system or piece of equipment is to gather and document information before it breaks.


2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, and 50 Gallon auxiliary fuel tank.

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[z28-50]

Agreed, I always say if you don’t know how it works when it’s working, you will never be able to fix it when it’s broken.

In other words, the best time to learn any system or piece of equipment is to gather and document information before it breaks.


2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, and 50 Gallon auxiliary fuel tank.

Sent from my iPhone using Tapatalk

Totally agree.

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[AK Bob]

Alternator AC Ripple/Diode test waveform.

Alternator Ripple Voltage and Current.jpg


2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit and 50 Gallon auxiliary fuel tank.

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[AK Bob]

Injector #1 voltage and current.

One pilot injection then main.

Noticed when the engine is cold (less than 120* F) there are two pilot injections prior to the main (see the second screenshot).

Injector #1 Voltage and Current.jpg

Injector #1 Control Current Cold.jpg



2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit and 50 Gallon auxiliary fuel tank.

Sent from my iPad using Tapatalk

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[CumminsForYa]

Dang, you are mapping those systems pretty well.

I haven't really looked at these before.

Very intriguing.

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