Pedal Assist Not Functioning & No Error Code Present

Loss of pedal assist can be caused by something as simple as a loose connection but in other cases, it may be due to a damaged component. If there is a loss of function on your ebike and an error code is displayed, refer to the ERROR CODES section of the Help Desk to proceed with correcting the issue. In some cases, there may be no obvious explanation for the current issue. This guide will assist in diagnosing a loss of pedal assist aka (PAS) when an error code is not present. 

If the bike loses pedal assist while the bike is on, the first thing you should do is check for any clear signs of damage to the cables or any loose connections. It is important to inspect the cables coming from the display, main wire harness, motor harness, torque or cadence sensor, and the controller.

• If any connections are loose, check for dirt or damage and reconnect the connection. Follow up by testing the bike for proper function. 
• If any cable, connection, or component is damaged, the associated part should be replaced. Once the new part is installed, test the bike for proper operation. 

If there is no visible damage to any cables or components, there may be an internal issue with one or more parts on your ebike. The order of operations regarding repair is different between cadence sensor bikes and torque sensor bikes. Aventon's earlier model bikes used cadence sensors which are simple sensors that send power once pedaling is detected. The cadence sensor is external on the non-drive side of the bottom bracket (excluding  Soltera 7). As new models were released, Aventon has spec'd their newer models with torque sensors which are more intuitive sensors that can send variable amounts of power depending on the rider's pedal input. Torque sensors are built into the bottom bracket assembly and are not visible from the outside. Below are examples of the two styles of sensor.

                                              Cadence Sensor

• If you are diagnosing a loss of pedal assist on a cadence sensor bike and have found no visible signs of disconnection or damage, ensure that the cadence sensor, located on the left crank arm, is pressed firmly against the bike frame with no rotation. Disconnect and reconnect the cadence sensor to the wire harness.
• If PAS is NOT functioning but the throttle and walk mode ARE functioning properly, the cadence sensor should be replaced first. 
• If the cadence sensor has already been replaced and the issue persists, replace the controller.
• If both PAS and the throttle/ walk mode are NOT functioning, replace the controller.

                                               Torque Sensor

• If you are diagnosing a loss of pedal assist on a torque sensor bike and have found no visible signs of disconnection or damage, disconnect and reconnect the torque sensor to the wire harness/ controller.

• We need to confirm whether pedal assist is the only thing not working or if there is also a loss of throttle or walk mode. So long as walk mode functions, then it is possible for the torque sensor to be reset. To reset the torque sensor, follow these steps:

  -We recommend putting the bike in walk mode to reboot the torque sensor.

  -Put the bike in eco mode and hold down on the arrow for 2 seconds.

  -This will put the bike in walk mode and assist itself.

  -Let the bike assist itself for about 30 ft.

  -Then put the bike back in eco mode and continue through all the assist levels.

  -Retest bike for regained function of PAS.

  NOTE: If a customer has a Level.2 - you will replace "eco" with "PAS 1" in the above prompt.

  If the issue persists, continue to the following steps below

• If PAS is NOT functioning but the throttle and walk mode ARE functioning properly, the torque should be replaced first. 
• If the controller has already been replaced and the issue persists, replace the torque sensor.
• If both PAS and the throttle/ walk mode are NOT functioning, replace the controller.