Yamaha PASC4 Owner's Manual page 39

To main riding display.
LightMemory (Light Memory)
Sets whether to ignore or save the on or off status of the
headlight when the power of the e-Bike Systems is turned
off.
headlight will not be saved when the power of the e-Bike
Systems is turned off. In addition, when turning on the e-
Bike Systems, the headlight will remain off.
light will be saved when the power of the e-Bike Systems
is turned off. When later turning on the e-Bike Systems,
the headlight will light or not light depending on the on or
off status that was last in use.
1.
(up) or (down).
2. When you press the function select switch, the setting
will then be kept and the display will return to the main
riding display.
Selection of
[S]
35
or
[ ]
[S]
[ ]
[ ]
[ ]
-