Car out of guarantee and dead MCU probably as a result of the emmc chip going bad.
Tesla wants $3100 to replace MCU, a way too large sum for such a relative to the error.
So I got my hands on a used MCU. We have successfully replaced VIN and setting from the old car, but the SW mismatch to the IC makes the car really misbehaving, don't drive, don't charge. We have successfully staged an update, but it fails to start, similar to when the 12V is bad (as seen in other threads).
Now we are trying to figure out if someone would know how to utdate MCU/cid outside the car, manually. We do have root and the image of ver 18.50 and we are have been able to stage the upgrade (get the yellow alarmclaock, set time for update and that) but it fails to start as mentioned above. It could be helpful to know how to read the errors that causes it to fail. We are trying to update from ver 17.50 to 18.50. We can connect an IC to the MCU if required in the process.
Tesla wants $3100 to replace MCU, a way too large sum for such a relative to the error.
So I got my hands on a used MCU. We have successfully replaced VIN and setting from the old car, but the SW mismatch to the IC makes the car really misbehaving, don't drive, don't charge. We have successfully staged an update, but it fails to start, similar to when the 12V is bad (as seen in other threads).
Now we are trying to figure out if someone would know how to utdate MCU/cid outside the car, manually. We do have root and the image of ver 18.50 and we are have been able to stage the upgrade (get the yellow alarmclaock, set time for update and that) but it fails to start as mentioned above. It could be helpful to know how to read the errors that causes it to fail. We are trying to update from ver 17.50 to 18.50. We can connect an IC to the MCU if required in the process.
