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  Topic Review (Newest First)
08-03-2019 11:57 AM
Neothunder I posted this on another tread. I had the same thing happen to me from pulling the HV disconnect that’s under the drivers side. If needed for safety you can pull it out but absolutely DO NOT turn the key on with it unplugged cause that’s what I did and it caused the error. I can tell you the solution the shop did was shutdown and restarted the HV battery system/computer. And then the message went away. After seeing that’s what they did I wondered if disconnecting the HV battery from under the car would cause that computer to power cycle and restart. Mine fixed now, but if ever that comes back for whatever reason. That’s the first thing I’ll do. If someone try’s it, I’d like to know if it works or not
06-28-2019 06:32 AM
jzchen Seems like member 007bond is able to with Autel units.
06-28-2019 05:48 AM
zoltan I reached out directly to Icarsoft and was told that their scanner was NOT compatible with the Electric Smart.
06-25-2019 09:02 AM
zoltan Do you know if anyone actually cleared the "HV System - Workshop" code?
Thanks in advance.
06-20-2018 12:21 PM
jzchen Always try to pull the relevant smarttekinfo documents for the job. That $60 is well worth it, and you can pull as much as you can handle in a day sitting in front of a computer and clicking your mouse button(s)....
06-20-2018 11:57 AM
emailchrishall Good words. I have a background in power and electronics. So I know when to stop with my tinkering. Its good to remind people to be aware of the high voltage potential of these cars. These forums can show up on Google searches so its good to float some warnings out there about the safety issues when it comes to EVs.


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06-20-2018 11:53 AM
Mister_smart_LA
Quote:
Originally Posted by Yinzer View Post
The wires shown in the picture are absolutely NOT high voltage wires - they are part of the 12V accessory power or LIN communication syatem or the 5V CAN communication system and Chris was doing nothing unsafe by disconnecting them. Even disconnecting the big HV (orange) connectors (as I have on the A/C compressor on my Smart ED) cannot harm anyone unless the person deliberately goes out of their way to close a circuit between the + and - poles of the battery pack i.e., DC is not like AC - closing a path from a single pole of the battery pack to earth will do absolutely nothing.

Or more simply, unplugging any electrical cord your home is probably more dangerous than unplugging a HV electrical connector in a Smart EV - especially since there is an interlock syatem that cuts power from the battery pack off immediately upon the connector being pulled.

Most of the rather extreme service measures imposed on Smart Service technicians are the result of lawyers, not electrical engineers. If the car's keyswitch is turned off than nothing in the HV syatem outside of the battery case is energized. There is also a separate "service disconnect" in the Smart becsaue of "lockout-tagout" requirements of OSHA or other countries occupational safety and health regulations.

There is entirely too much hype and scaremongering surrounding EVs by electrical physics-illiterate people in the "technology" industry. We are even seeing people thinking that if an EV goes into a lake, people swimming nearby can get electrocuted.

There is a scanner. The "iCarsoft i980 scanner" - that can be used to read and clear MB car diagnostic codes - probably including the "HV System - Workshop" one.

https://www.smartcarofamerica.com/fo...s-code-150194/

As warranties expire and our already unfriendly local MB dealers start refusing to work on Smart ED's, I really look forward to this forum being a place where we can obtain technical and safety information on repairing our Smart ED's. People telling us flatly "no user service should be attempted" are not going to be very welcome here in the near future.

If you want to work on your car it is your legal right and I'm not judging you for doing it. I was not intending to suggest that the person on this thread did anything they weren't supposed to do.



My message was to the general public who may stumble upon this thread and then take the seemingly logical decision to start working on their own car. Most folks will probably be fine because they will take the necessary precautions.



I've been trained on HV vehicles since 2010. Taken the sales and technician coursework. Those courses scare everybody to death because it's better to be fearful and take precautions than it is to make a critical mistake you can't ever make again. The purpose of my fear tactic was to scare people into taking the necessary precautions. Getting zapped by 400 volts is a mistake nobody can afford to make.

All the gloves, the cones around the car, the refusal to pull high voltage wires and begin work immediately, etc, is all just precautionary stuff. Super extra precautions are taken when working around HV equipment. Just be careful, that's the only point that I'm making. I'm not judging anybody.
06-19-2018 11:09 PM
Yinzer The wires shown in the picture are absolutely NOT high voltage wires - they are part of the 12V accessory power or LIN communication syatem or the 5V CAN communication system and Chris was doing nothing unsafe by disconnecting them. Even disconnecting the big HV (orange) connectors (as I have on the A/C compressor on my Smart ED) cannot harm anyone unless the person deliberately goes out of their way to close a circuit between the + and - poles of the battery pack i.e., DC is not like AC - closing a path from a single pole of the battery pack to earth will do absolutely nothing.

Or more simply, unplugging any electrical cord your home is probably more dangerous than unplugging a HV electrical connector in a Smart EV - especially since there is an interlock syatem that cuts power from the battery pack off immediately upon the connector being pulled.

Most of the rather extreme service measures imposed on Smart Service technicians are the result of lawyers, not electrical engineers. If the car's keyswitch is turned off than nothing in the HV syatem outside of the battery case is energized. There is also a separate "service disconnect" in the Smart becsaue of "lockout-tagout" requirements of OSHA or other countries occupational safety and health regulations.

There is entirely too much hype and scaremongering surrounding EVs by electrical physics-illiterate people in the "technology" industry. We are even seeing people thinking that if an EV goes into a lake, people swimming nearby can get electrocuted.

There is a scanner. The "iCarsoft i980 scanner" - that can be used to read and clear MB car diagnostic codes - probably including the "HV System - Workshop" one.

https://www.smartcarofamerica.com/for...s-code-150194/

As warranties expire and our already unfriendly local MB dealers start refusing to work on Smart ED's, I really look forward to this forum being a place where we can obtain technical and safety information on repairing our Smart ED's. People telling us flatly "no user service should be attempted" are not going to be very welcome here in the near future.
06-19-2018 04:53 PM
jimsokoloff I have provoked that message by compromising the CAN bus with an incorrectly assembled battery test unit during testing.

In that case, removing the offending test unit (from OBD2 port) and power cycling the car fixed it.
I suspect youve already effectively tried that, though.
06-19-2018 12:59 PM
Mister_smart_LA I have factory trained technicians who work on cars daily for a living, including electrical work. When dealing the smart EV (and any other electric vehicle for that matter), the voltages can get high enough to kill somebody. So please be sure you know what you're doing if tapping into any wiring, and I can say from my own personal training that if there are any wires wrapped in orange --- DEFINITELY leave those alone. Those are high voltage lines.

For certain jobs they let the car sit and place cones around the vehicle as a warning for any curious george's to stay away from the vehicle as the HV battery may be removed, or exposed, or other components.
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