Bike takes off without engaging throttle

[PCeBiker]

Most resistors aren't affected substantially by water, that's why you don't get the same behavior.

I was thinking about water in the connector that could feed some of the +5 V to the signal wire causing the throttle to activate.

I figure that software could be trained to identify that kind of fault ?

I'm not really sure why bike makers don't use variable resistance in throttles instead of the HAL effect.

The HAL sensor throttles do work great !!
They just have to seal up the little circuit board inside to make them waterproof.

Which reminds me.
I have yet to seal the circuit boards in all my dozen throttles.

The only thing that I can see that could be an issue with a HAL sensor is that metal particles could stick to the magnet, but even that shouldn't matter because the "sensor" (a small coil I think?) is also sealed. (or should be)

I've got HAL sensors all over my car and they just keep working regardless of salt and water.
They're just build better. Properly sealed anyway,..

When my wheel hub rusts out and falls off the car, it'll be the HAL sensor wire that keeps it connected to the rest of the car.

 

[PCeBiker]

Often, there isn't any visible moisture in the connector. Use a heat gun or hair drier on it anyway to be sure. It doesn't take much to cause problems.

I took apart every connector on both my e-bikes when they arrived and PACKED them full of dielectric grease.

It not only protects the connections, it also seals out water and oxygen to prevent oxidation.

It also helps to absorb and conduct heat, so it helps to keep motor cable connectors from overheating and melting.

When a contact gets hot it starts to oxidize. The oxidation creates resistance that further increases the heat until the connection starts to melt.