Hey guys,
When sitting at home, my Tesla connects to my Wi-Fi so it can get updates, but the connection from inside my home to out in the driveway is weak, so when I need to navigate somewhere I (by habit) turn off the Wi-Fi before inputting a destination. The other day, I did this without noticing that I had a navigation data update in progress. The car immediately had a freakout, throwing a code saying that I am unable to download updates because my 12V battery system is disabled. There were zero codes before I shut off Wi-Fi, this is obviously a bug due to turning off Wi-Fi in the middle of the download... but just in case I went ahead and checked voltage on the 12 volt system with my multimeter. 12.4V (lead acid, not the new Lithium 12V) so that isn't a problem. I wasn't able to figure out a way to clear codes, so I did a hard reset by pulling the connector under the rear passenger seat and the negative battery cable. While I was at the 12V battery, I did note some minor corrosion, so I cleaned up the terminal and cable end just to be on the safe side. The codes (first code VCFRONT_a402_LVBatteryCannotSupportVehicle, second code VCFRONT_a182_replace12VBattery) are clear and I haven't had any problems since resetting the system.
I can clear codes on a regular car with a generic code reader device, and if the problem persists the code comes back... I am wondering if there is a way to do this in service mode rather than having to do a hard reset?
Later,
Keith
When sitting at home, my Tesla connects to my Wi-Fi so it can get updates, but the connection from inside my home to out in the driveway is weak, so when I need to navigate somewhere I (by habit) turn off the Wi-Fi before inputting a destination. The other day, I did this without noticing that I had a navigation data update in progress. The car immediately had a freakout, throwing a code saying that I am unable to download updates because my 12V battery system is disabled. There were zero codes before I shut off Wi-Fi, this is obviously a bug due to turning off Wi-Fi in the middle of the download... but just in case I went ahead and checked voltage on the 12 volt system with my multimeter. 12.4V (lead acid, not the new Lithium 12V) so that isn't a problem. I wasn't able to figure out a way to clear codes, so I did a hard reset by pulling the connector under the rear passenger seat and the negative battery cable. While I was at the 12V battery, I did note some minor corrosion, so I cleaned up the terminal and cable end just to be on the safe side. The codes (first code VCFRONT_a402_LVBatteryCannotSupportVehicle, second code VCFRONT_a182_replace12VBattery) are clear and I haven't had any problems since resetting the system.
I can clear codes on a regular car with a generic code reader device, and if the problem persists the code comes back... I am wondering if there is a way to do this in service mode rather than having to do a hard reset?
Later,
Keith
