Zxdz 2021 Update

The voltage reference comparator has been re-engineered. In older units, a drop of 0.1V would trigger a disconnect. The 2021 logic now supports a hysteresis window of 1.65V to 5.5V with active buffering.

This is the most common method for the 2021 firmware and later releases: zxdz 2021 update

turn off the car ignition or unplug the USB during the 5–8 minute installation process. The voltage reference comparator has been re-engineered

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