Had a tractor come in with a thought to be electrical issue.
Connect laptop to get the codes, points to a sensor fault. Test the sensor, sensor is good. Test the harness, harness is good. Install sensor from a known working machine, still shows active code. Check software update, cause sometimes it does fix it, new software let the magic smoke out of the engine controller because the fucking engineer put the wrong parameters in the new software.
Turns out original problem was a loose bulkhead connector pin between the sensor and ecu wasn’t making full contact. So had to install a new ecu that originally never needed replaced because someone on the assembly line didn’t insert a pin in a connector correctly.
All of the older machines I deal with have to be repaired because the farmer wore them the fuck out after years of working the hell out of them.
https://roguemechanic.tumblr.com/post/642785592822874112/oglach-uisce-tilthat-til-that-farmers-are
Great story, except if he would have completely performed a "Test the harness", he would have gone to each connector in the line he was testing. And the bulkhead connector is probably one of many. Yes, it's time consuming, but it's the only way to get a good diagnosis.
ReplyDeleteAny Service Information from a manufacturer,whether automotive, industrial, or agricultural, outlines proper diagnostic procedure. SI will also outline how you can verify if you have the most current update to the software. If you have the current level of software (Version 3.9, whatever) it will not do any good to blow in the same version. If "the fucking engineer put the wrong parameters in with the new software", then every single ECU that software was installed in would be blowing up.
So while his colorful description and blaming somebody else for his lack of doing the job correctly may be entertaining, it's bullshit.
As someone who has been a Master ASE Technician for 32 years and spends his day training "mechanics" to not make these mistakes, I feel more than qualified to make this judgement.
And yes, there is a difference between a "repair guy", a "mechanic", and a "Technician".
I just relay the stories, I don't make them up. I sure don't have the time for that
DeleteHave a look at Lord Muck on youtube, There is a young lady that works with him on and off.
ReplyDeletenice, this you tuber does a LOT of tractors!
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