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Hyundai Elantra Can Bus not work when engine off


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vtthanh83 
Member - Posts: 4
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Joined: April 18, 2016
Posted: April 18, 2016 at 2:40 AM / IP Logged Link to Post Post Reply Quote vtthanh83
Hello,
I am new to Hyundai. Previous I has been working with Toyota, Nissan, Mitsubishi, etc. and all send out CAN Bus data whenever an event occurred (lock, unlock, door close/open, etc.). However when I tried to capture CAN data form Hyundai Elantra 2015, there is no data sent out when the engine is off for whatever events. I have tried to send any dummy message but no thing happen. It just sends data to CAN bus when engine is on. Do you have any reason on this or somehow can we trigger CAN bus to report current status when engine is off.
Thanks and looking forward to your help.
Regards,
Thanh
rs specialist 
Copper - Posts: 175
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Joined: September 30, 2015
Location: Arizona, United States
Posted: April 19, 2016 at 6:31 PM / IP Logged Link to Post Post Reply Quote rs specialist
The CAN network work pretty much the same across all platforms, just different codes. How are you interfacing with the can network? What is the end goal? What are you installing? That vehicle has 2 CAN networks on it as well.
vtthanh83 
Member - Posts: 4
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Joined: April 18, 2016
Posted: April 20, 2016 at 11:53 PM / IP Logged Link to Post Post Reply Quote vtthanh83
Thanks RS,
The final goal is to use my Can Bus hardware to capture Can data (whatever event occurred) when the engine is off. I am using my customized hardware that is based on MCP2515 - MCP2551 ICs. I set the baudrate to 500Kbps and attach to OBD port of Hyundai Elantra, however I only can capture data when engine is on, when it is off there is no data on OBD port at all. For other brand such as Toyota, Nissan, Mitsubishi the OBD port always output some Can data whenever events occurred (lock/unlock) even when engine is off. I dont care about CAN ID, just need to see output data.
Are there 2 CAN networks on Hyundai Elantra? Where can we attach to another one rather from OBD port?
Thanks
rs specialist 
Copper - Posts: 175
Copper spacespace
Joined: September 30, 2015
Location: Arizona, United States
Posted: April 21, 2016 at 10:14 AM / IP Logged Link to Post Post Reply Quote rs specialist
https://fortin.ca/download/27981/evo-all_hyundaielantra_key_e20150123.pdf
In this guide you will see where the second set of CAN wires are located.
vtthanh83 
Member - Posts: 4
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Joined: April 18, 2016
Posted: April 22, 2016 at 12:50 AM / IP Logged Link to Post Post Reply Quote vtthanh83
Thank RS for your great help!
pepbr 
Member - Posts: 1
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Joined: January 15, 2017
Location: Brazil
Posted: January 15, 2017 at 8:52 AM / IP Logged Link to Post Post Reply Quote pepbr
Hello vtthanh83. I am trying to do the exact same thing as you and I wonder if you succeeded taping the second canbus network.
Yesterday I was able to dump data from the obd port but no matter what I did in the car it seems no suitable id was logged. So I couldn't reproduce any of my actions.
Do you mind exchanging information regarding this?
Thanks in advance,
Paulo
pepBR - Curiosity moves the world

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