I retrofitted my 2017 LR Model 3 to enable CCS charging using the Gen4 charger ECU (1537264-00-B), bundle of wires (purchased on June 6th), and Tesla CCS adapter acquired via Harumio.
Installation of ECU and bundle of wires was completed without a hitch. The next day, I was able to charge via L2 connector with no problems. A few days later, I was able to fast charge via CCS (Volta station at Stonestown Galleria) with no problems. I was excited that I pulled it all off!
Then, the problems started. A few days after my first CCS charge, I plugged into an L2 charger and got the following error: "Charge port requires service. Charging may not be available." The car still charged without a problem, so I didn't think much of it. I charged a few more times with both L2 and Tesla Supercharger, and got no errors, so I thought I was in the clear. I then attempted to charge via CCS again, which charged for a few minutes, but then stopped and I again got the error "Charge port requires service. Charging may not be available." I immediately plugged into an L2 charger, and got the same error, although the car still charged. While in service mode, I looked up the error, and the service error code was "CP_110_thermalVelocityHigh" (image below).
I kept experimenting with L2 and Supercharger sessions over the next few weeks, and I would occasionally get the same error, but the car would still charge. But then, supercharging finally stopped working, which forced me to try to find a solution.
I purchased another bundle of wires (on July 14th, newer version w/ circuit board) thinking that maybe a resistor was loose (thanks @FalconFour for the suggestion). I still got the same error with the new bundle, so that wasn't the problem. I then reinstalled the Gen3 ECU, reinstalled the software, and now L2 and Supercharging work with no errors. So, here are my options as I see them:
Installation of ECU and bundle of wires was completed without a hitch. The next day, I was able to charge via L2 connector with no problems. A few days later, I was able to fast charge via CCS (Volta station at Stonestown Galleria) with no problems. I was excited that I pulled it all off!
Then, the problems started. A few days after my first CCS charge, I plugged into an L2 charger and got the following error: "Charge port requires service. Charging may not be available." The car still charged without a problem, so I didn't think much of it. I charged a few more times with both L2 and Tesla Supercharger, and got no errors, so I thought I was in the clear. I then attempted to charge via CCS again, which charged for a few minutes, but then stopped and I again got the error "Charge port requires service. Charging may not be available." I immediately plugged into an L2 charger, and got the same error, although the car still charged. While in service mode, I looked up the error, and the service error code was "CP_110_thermalVelocityHigh" (image below).
I kept experimenting with L2 and Supercharger sessions over the next few weeks, and I would occasionally get the same error, but the car would still charge. But then, supercharging finally stopped working, which forced me to try to find a solution.
I purchased another bundle of wires (on July 14th, newer version w/ circuit board) thinking that maybe a resistor was loose (thanks @FalconFour for the suggestion). I still got the same error with the new bundle, so that wasn't the problem. I then reinstalled the Gen3 ECU, reinstalled the software, and now L2 and Supercharging work with no errors. So, here are my options as I see them:
- Buy another Gen4 ECU to see if my current board is the problem (maybe a solder point was a little loose and is now fully disconnected, and that's why CCS charging worked once but then never again). Pros: only $140 more dollars to spend. Cons: have to get another ECU from Tesla, and the ECU might not even be the problem
- Give up on CCS charging and sell everything. Pros: I get money back, and I don't have to be frustrated by this problem anymore. Cons: no CCS charging at all