LIN Controlled Alternator Repair Secrets Revealed

In this video I explain how to use an oscilloscope to diagnose LIN-BUS on charging system. On this Ford Fiesta, alternator is controlled by ECM through LIN (Local Interconnect Network). In this video I show you how I read the LIN BUS waveform and how to analyze it to find a fault on this network. I used a Launch Scopebox on this video.
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🎯You might be interested to watch the following videos too:

▶️ CAN-BUS Explained | Everything You Need to Know About CAN-BUS | CAN-Bus Diagnostics & How It Works

▶️ Test CAN BUS With a Multimeter | Quick & Easy | CAN Bus Resistance, Voltage & Short to Ground Test

▶️ LIN Bus Explained | Everything You Need to Know about LIN BUS | Local Interconnect Network

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🎯 Disclaimer:
Any information contained in this video is just the understanding of “Automotive Diagnosis: Cars Repair & Training Guides” and it is not an official guide or reference, so everything provided in this video is just a share of our experience and understanding and they are provided as a courtesy for your reference only. So, if you are using any part of this video, use the information at your own risk. We highly advise you to check the manufacturer owner’s manual before performing any act of removal, diagnosis, inspection, or repair on your car to know about what you are authorized to do on your car, what the correct and legal procedure is and what risks might be involved, also viewers are strongly advised to consult a licensed person before any sort of inspection or repair. Due to the factors beyond the control of “Automotive Diagnosis: Cars Repair & Training Guides”, we cannot guarantee against improper use of information or tools or systems, or the procedure provided. “Automotive Diagnosis: Cars Repair & Training Guides” disclaims any damage, injury or loss caused by your decision to follow the steps provided in this video.

[AutomotiveDiagnosis]

🧑‍🎓 Online Course: Automotive LIN-BUS & K-LINE Intro, Application & Diagnosis

[AutomotiveDiagnosis]

You might be interested in watching the following video too:
LIN Bus Explained | Everything You Need to Know about LIN BUS | Local Interconnect Network

[MarzNet]

Excellent video on communication line data traffic. Seeing the regulator module disconnected and reconnected on waveform makes the difference very clear, and you can see the PCM is doing most of the talking.

[AutomotiveDiagnosis]

Online Course: Automotive LIN-BUS & K-LINE Intro, Application & Diagnosis

[mazdaservice]

I've had some cases with only one wire on the alternator connector and I was always wondering why one wire only! Now I know that one wire is network, thank you my friend, very helpful video for me.

[mastertechncian]

This is the best channel ever, I love your videos about network, keep up the good work

[carsmobileservice]

Your videos are very informative and easy to understand, Thank you

[drazenaudi]

Obozavam te slusat i gledat cak i one stvari koje znam. Izvrstan si.

[Ianfx]

Perfect teaching and easy to understand.

[waudathethird]

I've been waiting for this. Thank you😊

[bartscave]

Thanks for posting these videos! I appreciate the effort.

[Alfonso]

I love your channel, keep up the good work

[bwagizoselemani]

You are always the best sir! Keep it up we really want more lessons about this Auto electrical

[cartech]

Thank you for this great information and knowledge

[parvulucian]

Love your channel. So much useful videos.
I have the same one wire LIN bus setup on my Renault alternator and i just had a problem with the alternator not charging anymore (engine running and my cigarette lighter volt-meter was not reporting above aprox 12 V). I disconnect the LIN wire from the alternator and the charging went back to aprox 14 V.
Now, is this sufficient to conclude that the alternator is not the problem and leave as "suspect" a wire problem or the UPC (on Renault that module is controlling the LIN to alternator, not the ECM)?

I also have an oscilloscope and i will do the proper test on the network but only based on this single evidence is save to asume the alternator is ok?

[Eddy-hw]

Very informative video and useful information

[DuaneDonaldson]

Pretty good video for a beginner series as this video does not explain the Header signature, you did mention a slave but did not go into depth on that as there appears to only be one slave on the Header signature anyway. I see another link in your comments so I will go check it out as well. Cheers

[vicky-ncto]

1. I believe that the upper voltage level may change if car is started or charger is connected, but the lower part of lin signal (around 800mv) should not change.
2. The Lin signal kind of becomes dense or more close to each other while the disconnected connector is plugged again as now there is more information is flowing. Am i right sir?
Thankyou for the great video.

[marktirabassi]

Hello. What kind of scanner are you using ? Tks

[Mohsen-mkud]

Thanks. I want to buy an oscilloscope but I'm looking for a good/cheap one, what would you suggest?