E-Bike Does Not Pedal Assist or Throttle

If your bike is not pedal assisting or throttling, but is still turning on, there are quite a few different things that could be going on. Running through the electric system, the parts that could be causing this are:

  • Controller
  • Motor
  • Wiring harness
  • Throttle
  • Pedal Assist Sensor
  • LCD Display
  • Brake Kill Switches

While all of these could be potential issues, the throttle, pedal assist sensor, and LCD display would very rarely be the problem in this case. While they could be the issue, the throttle and pedal assist sensor would have to be giving issues at the same time, which would be rare for them to both break independently of each other. But we can’t rule it out completely, so keep it in the back of your mind! For troubleshooting to see if the throttle or pedal assist sensor is the problem, check out our No Pedal Assist and No Throttle Power sections of this guide.

One of the big parts that could be preventing your motor from going may be your kill switches on the brakes. The kill switches work via a magnet sensor tracking movement. So when you close the brake lever, it sends a signal to the controller to shut the motor off, so you do not compete against your own motor when stopping. But, if this sensor malfunctions, it could be constantly sending a signal to the motor to cut power. To check this, unplug both of the plugs leading to the brake levers and then try and power the bike. If the bike gets power and goes, it was one of those kill switches. Plug them in one at a time and test to see which one (or both) are malfunctioning. You would need to replace the brake/brake lever to solve this issue. If this is not the problem and the bike still does not get power to the motor, then the culprits are more than likely either the controller or the motor. Unfortunately for these parts, there are not as many tests we can run and it falls more on just swapping parts with ones that you know are functioning and seeing which solves the problem (it can be both sometimes). Occasionally, the motor can give some signs that it is the problem. If you try and throttle the bike, but the motor sounds like it is struggling or makes faint click sounds, then the problem more than likely rests in the motor. But aside from any sounds you can hear, the only way to find the problem part is to swap for new functioning parts and see what solves the problem.

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