Experts share their experience in automotive diagnostics J1939 protocol

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Experts share their experience in automotive diagnostics J1939 protocol [Copy link]

I would like to ask all the experts to share their experience and information on the J1939 protocol. I am doing automotive diagnosis and how to analyze the message and data format.

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Just look at the standard protocol, the communication protocols are fixed

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Posted by Knocking Code All Night on 2017-11-30 14:10 Just look at the standard protocol, the communication protocols are fixed

The data between the device and the ECU is difficult to analyze, and I don’t know which ones perform specific functions

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Hell Judge published on 2017-12-1 09:59 The data between the device and the ECU is difficult to analyze, and I don’t know which ones perform specific functions

What device, dedicated or general, the general basic communication protocol can be found. If you can’t find it, look for the manual of the car or ECU manufacturer.

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Posted by Typing Code All Night on 2017-12-4 09:22 What kind of equipment, dedicated or general purpose, you can find the general basic communication protocols. If you can't find them, look for the car or ECU manufacturer...

For example, Bosch and Yuanzheng, they communicate with ECU, there is no frame data analysis, code reading, data flow, function testing, etc.

xinjitmzy

1939 is not a communication protocol, it is a specification.