For those that have a JDM S I Drive BL/ BPs and wonder what the random occassional single audible beep means (similar to each time transmission mode is changed.)
And not able to read the Japanese script in the multi - function display as well.
- finally worked it out with mine recently - display showed 2 at the time it beeped which corresponded with 2 hours driving. when checking trip duration.
Guessing its a warning / alert to take a break from driving.