The root cause of Ninebot Max G30 Error 14 (for throttle) & 15 (for brake) is that: the display unit cannot detect the connection between the throttle or the brake, then it shows the error 14 or 15, so the solution is simply to reconnect them.
This tutorial teaches you how to fix this issue within 5-10 mins.
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Highlights
00:21 Remove the display cover
00:32 Take off the display
00:37 Identify different cables
00:48 Reconnect the cable (for throttle and brake)
01:07 Fasten the connection
01:19 Install everything back
