[Chadsolomon]

Today, I received an error message I translated as front brake switch is too high. What causes a too high voltage? Is this a switch replacement at the master cylinder or something else?
My bike turned 20k miles a few days ago and this is the first 'real' issue to face.
Not bad! How to address?
Chad

 

[Kitulu]

If the ECU is reading too high a voltage at the switch, it is probably just dirty and needs to be cleaned. If not the switch itself, it may be that some dirt or moisture got into the connector. If cleaning the switch and/or connector does not work, then you may need a new switch.

Most, if not all, of the various switches and sensors are read by the ECU as changes in voltage or resistance. Voltage or resistance within a certain gate = proper operation, as well as telling the ECU to, say, turn on the brake lights or activate the ABS, for example.