101 | HMI - USB charge port error

Written by Alex Kovell

Last published at: September 9th, 2025

Description

Under normal circumstances, the USB port supports the connection of a wired dongle for diagnostics and data transmission, as well as charging mobile devices. However, if the system detects that the output current exceeds 1A, it indicates a potential abnormality.

⚠️Triggers of Error Code

The following are possible causes of error code 101:

  • Abnormal electric current at the USB port.

1 E-bike remains stationary

Before proceeding with the e-bike inspection, ensure the bike is stationary, and do not sit on the bike, pedal, or apply any force to the pedals.
Long press the power button to turn off the e-bike.

 
 

2 Turn off the e-bike and check the connector between [HMI] and [Controller]

Long press the power button to turn off the e-bike. Find the connection cable between [HMI] and [Controller], and check if the cable connector is plugged in properly. If the connection is loose, plug the connector back in tight carefully. When plugging the connectors, ensure the arrow symbols on the two connectors must be aligned.

 
 

3 Check the Cable and Connector Pins

Check the cable for damage. Then, unplug the cable connector and examine the connector pins for bends or breakage. If any issues are found, replace the damaged component or extension cable. If both the cable and connector are in good condition, proceed to the next step.

 
 

4 Replace the HMI

4.1

Replace the [HMI] with a new spare, then reboot the e-bike to check if the error code still exists. If this doesn't fix the issue, proceed to the next step.

4.2 Replace the extension cable between [HMI] and [Controller]

If there's an extension cable connecting the [HMI] and [Controller] on this e-bike, replace it with a new spare. Then, turn on the e-bike to check if the error code persists. If the issue is not resolved, proceed to the next step.

 
 

5 Replace the Controller

Replace the [Controller] with a new spare, then reboot the e-bike to check if the error code still exists. If this doesn't fix the issue, proceed to the next step.

 
 

6 Reach out to the Service Team if you need additional support!

Contact Customer Care or the Hyena Service Center for further technical assistance.

 
 

 


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