Reset adaptive values

discostew

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Sep 14, 2010
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I don't think the adaptive values can be reset by the method he performed. I say that because a local Rover tech and shop owner reset mine for me twice, for free. I have to think he would have saved both of us the time and just told me to touch the battery leads together after being disconnected.
I don't ever plan on owning another AEL D1 but I guess I'd still be interested to know if the touching leads method works for sure.

You guys are probably right. I know on the newer stuff a hard reset will reset the adaptions. Remember I'm old and every time I learn something about something new. Something has to get pushed out, no more room.I think they call it forgetful.

Somebody told me that shit would make me forgetful but I can't remember who said it now.

Was it Glen who reset those adaptions for you?
 

fishEH

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Jan 26, 2009
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Lake Villa, IL
You guys are probably right. I know on the newer stuff a hard reset will reset the adaptions. Remember I'm old and every time I learn something about something new. Something has to get pushed out, no more room.I think they call it forgetful.

Somebody told me that shit would make me forgetful but I can't remember who said it now.

Was it Glen who reset those adaptions for you?
No, George. Glen replaced a brake light switch for me when I first got my truck. When I got the bill I realized i better learn to work on my own trucks. Only time I've had it back at the shop since then was for the adaptive values.
 

discostew

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Sep 14, 2010
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No, George. Glen replaced a brake light switch for me when I first got my truck. When I got the bill I realized i better learn to work on my own trucks. Only time I've had it back at the shop since then was for the adaptive values.

I never worked with Glen but we know who each other are. I think he's a good tech and it's always good to see a guy get out from under dealerships. My old service manager said to me "He writes a great story"
The pen is the strongest tool we use sometimes to get paid. That man knows how to play the game.
 

robertf

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Jan 22, 2006
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There's a lot going on there. I'm guessing based on the vintage that the adaptive values are stored in at least 2 serial eeproms since there are 2 processors. I think one is for ignition (ti chip by the green eprom) and the other (by the blue eprom) handles everything else. I read a bunch of EPROMs and was planning on starting disassembling them next time work sends me to nowhere for a few weeks

http://www.flemcodesign.com/pics/IMG_1679.JPG

Looks like the chip under the green EPROM may be one of the serial eeproms. I'll have to get some #s off it and check later
 
I suppose a complete reset of the related EPROM is possible but it seems more likely that it may be a series of commands to the processor in turn writing out to the EPROM.

It would be nice to get a capture of the OEM tools talking to the ECU/ECM and see what commands it is sending. From there it may be simpler to add them to a open source OBDII tool; if in fact OBDII port is where they connect to do this reset.
 

robertf

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Jan 22, 2006
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I suppose a complete reset of the related EPROM is possible but it seems more likely that it may be a series of commands to the processor in turn writing out to the EPROM

I thought that was obvious and you were asking about the behind the scenes stuff


it would be easy to put together a k and l line packet recorder and record what a scan tool is sending, but goos luck finding someone who bought a scan tool to let you borrow it for the sake of saving money
 
I thought that was obvious and you were asking about the behind the scenes stuff


it would be easy to put together a k and l line packet recorder and record what a scan tool is sending, but goos luck finding someone who bought a scan tool to let you borrow it for the sake of saving money

Correct. I was interested in the ECM operation as well as how to wipe it. No harm in knowing both.
 

discostew

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Sep 14, 2010
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I have access to a T4 and am working on loading the correct software into an old retired toughbook. If you guys wan't to send me what ever you need to hook into the diagnostic connector I will record all kinds of directional commands by the T4. I could just back probe into the bus lines at the back of the trucks connector I suppose.
 

discostew

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If the device had a standard size banana plug on the end it would be easier. I have a pinout box that sits between the diagnostic connector and the T4. It could even have its own OBD2 style connector on it because 2 are available on my pinout box.
 

robertf

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Jan 22, 2006
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are the obd2 connectors in parallel? That would make it easy. It needs to eavesdrop on t4 to vehicle communications

any chance you could also record some remote/fob/plip programming and maybe an airbag reset?
 

discostew

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Yes I can plug my pin out box on the car and then there is a place to plug in two different scan tools. So the t4 can plug into the car and another can also plug in. And yes it would be in parallel. Ill record anything you want. Ill come in on a saturday and spend the whole day doing it.

http://www.obd2cables.com/products/...j1962m-to-j1962f-to-j1962f-3-connections.html

This one. It's been a great tool for coms issues
 

robertf

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Jan 22, 2006
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thats neat, never seen one of those before

Im going to go with the banana jacks since the obd2 cable i have doesnt have the pins for airbag or alarm

We know k and l line are iso protocol, I have no idea what the other 2 are but Im going to set it up to just log pin value change and time delta. well deconstruct it later, but it would be nice to put together an android app or something so that these 20 year old vehicles are no longer dealer dependent
 

discostew

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Sep 14, 2010
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Thanks for the link. Looks good and may add one to my collection. Appears to have other potential uses as well.
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If I have a Can network fault this guys out. I hook a scope right into the Can lines and get my patterns from there. I hook the SDD into the box and it doesn't ever have a problem with it being there. I have had my snap on scan tool on it at the same time so I can watch a specific signal that I suspect and the SDD doesn't seem to know its in the circuit. I like the thing.
 

number9

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Nov 21, 2015
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Coastal Georgia
complete reset of the related EPROM is possible
Just an FYI since mentioned earlier. The EPROM(s) are used to store firmware and have relatively few reprogramming cycles. Adaptive values should be stored on RAM which allows for continual adaptations.
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I like the thing.
On my to buy tool list and after a bit of searching it looks to be the the best one available feature/build wise. Thanks again.
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No longer on list, ordered one. May never find a need or use on my vehicles but will certainly fill a space and may be able to help diagnose one of my bud's com issues down the road. Would have been handy to have when there was no power to my F250's port. Was able to check using a small probe and found fuse blown due to faulty cigar lighter on same fused circuit.
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robertf

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Jan 22, 2006
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Just an FYI since mentioned earlier. The EPROM(s) are used to store firmware and have relatively few reprogramming cycles. Adaptive values should be stored on RAM which allows for continual adaptations.
......

On my to buy tool list and after a bit of searching it looks to be the the best one available feature/build wise. Thanks again.
......

its the atmel 28C16 serial eprom containing the adaptive values he is refering to , not the eproms containing the "tune"

The non volatile ram is made up of the serial eprom, and its really not RAM since its serial

http://www.atmel.com/Images/doc0540.pdf