Isn't it low voltage?
After I started engine voltage was about 14, then became 13V.
I tried to get to see voltage on display, only could do it once.
First and third time entering diagnostic procedure didn't work. I would like to drive with voltage on display.

 

once you have it in ETM, just keep toggling to the next value displayed....and eventually, the voltage will come back round....but by then you'll be so conditioned to pressing the button to move to the next number that you'll blow right past it and have to go 'round again!


I've driven both the 03 and 05 in ETM with voltage displayed. Slight differences in which buttons do what to the display, but I can't recall now which is which.....seem to recall the display button on the stalk advances one car, and the other one, same function is had by pressing the A/B button...


IIRC, the alternator voltage is temperature-dependent and is described in JJTIS. I think it starts out at 15.5 or so, temp permitting for some number of seconds, then falls off according to some schedule

 

Workshop manual tells you the values and why. Use a proper meter and check.