2019 s4 72volt having issues
 

Someone had used a Curtis handheld to speed this cart up, and now it’s having several issues. The voltage in the battery pack is 94 volts, which seems high. Also the charge indicator will only show 77% charge. The cart will also drive with the charger plugged in. I’m wondering if there is any way to reset the controller to factory settings or is it possible the controller is corrupted?

Re: 2019 s4 72volt having issues
 

I usually won't touch a 72V L6 or S4 that's been corrupted by some ***** messing with something they know nothing about. But I'm probably the only guy that would have the correct factory file from Curtis that could be used to reflash your controller back to normal, then do the speedup the correct way. Where are you located?

Bob

Re: 2019 s4 72volt having issues
 

I am in Eastern North Carolina. This one has been a real mind bender for me.

Re: 2019 s4 72volt having issues
 

It's a protected controller. Which means, while a handset can be used to change values, if it is not unlocked properly first, any changes made will cause the controller to malfunction. To restore operation, it must be returned exactly to the settings it was delivered with. Even setting the profile for 1/10 of a MPH higher will mess it up. Dealers don't know these new controllers and mess them up all the time when trying to help the customer. Usually, they have to put in a new controller to fix it.

I'm preparing for another trip to cover NC/GA/SC/FL/AL/LA in the very near future. You can use the PM system now, so send a PM to usgicollector and have him put you on the list...

Bob

Re: 2019 s4 72volt having issues
 

Thank you Bob, I will be in touch.

Re: 2019 s4 72volt having issues
 

Bob, just for knowledge sake. Does it prompt you when you connect to it for a password or unlock sequence or do you just have to know where go in the menus to tell it with credentials to unlock. If you don't want to post that info here I understand. Curtis is already upset with us messing with their stuff..

Re: 2019 s4 72volt having issues
 

No, it does not prompt you for a password. It acts like all is normal and ok, until you make a change to a protected value, then try to operate it. Suddenly, you find that not all is well. If you reverse what you changed, it goes back to normal. If you make another change, further away from the factory settings, it corrupts further. Several steps in, your only way back is to reflash it with a factory file, as you've lost track of all the changes made and normal operation is lost. If you lead with the unlock procedure, and wait for the response, you will see the menu options change. At that point, your changes will not corrupt the controller. If people had not spread the interface hack far and wide without consideration for how that affects Curtis, Curtis would not have been forced to introduce countermeasures and come out with a new interface to support a newer communications protocol that renders older programming interfaces obsolete. The 2020 controllers require that new interface.

Re: 2019 s4 72volt having issues
 

Thanks for the explanation sir. I guess this means if you don’t know what you are doing don’t attempt it but if you do try you better take a snapshot before you start. And even that may not save you.

Re: 2019 s4 72volt having issues
 

Even saving a file prior will not save anyone that does not have compatible Curtis hardware and software. Even those custom interfaces that you and usgicollector now have will not be usable for a full reflash. I have since become aware that there was corruption in the interface. Salvaging a corrupted controller requires programming equipment that can completely write compiled OS/VCL files to that controller. I had to buy new hardware myself that is compatible with late 2019 and all 2020 controllers that I had worked on.

Re: 2019 s4 72volt having issues
 

Good to know. Saving the snapshot would be at least good to send with the controller when it has to get reflashed.. I think I am just going to quit touching carts for fear I might break something.. If I need changes I know this guy I can get in touch with. :mrgreen: