Radster Road and Radster Trail (2024) error 30 / connector check guide

Use this procedure to check the cable connections on your Radster Road or Radster Trail that may be causing electrical error messages or preventing the bike from powering on. This process will require you to power down your ebike, unplug individual cables and inspect them for damage, then carefully reconnect them and power on the ebike to see if that resolved the issue. Repeat the process with each cable until the issue is resolved, or you isolate the problem to a specific component.

The diagram below shows the Radster Trail, but the cables and troubleshooting steps are the same for the Radster Road.

Tools needed:

• 3 mm Allen wrench
• Torque wrench with Allen bits
• Flat-side cutters
• Replacement zip ties
• Bike stand (optional)
• Nitrile gloves (optional)

1. Get the ebike ready for maintenance. Turn off the ebike, remove the battery, and press and hold the Power button to discharge remaining power.
2. Inspect the battery and battery mount terminal contacts. If the contacts are damaged, dirty, or wet, the part may need to be replaced. Take a photo and contact Customer Support for help. If the contacts are in good condition, set the battery aside for now.
3. Inspect the main cables. The Color Display, Battery and Wiring Harness cables are the first ones to check, as if any of these cables are damaged or disconnected, your ebike will not power on. 
   1. Unplug each of the following cables (see diagram) one at a time. You may need to uncoil the cable cover to reach some of the connectors. Snip any nearby zip ties if you need cable slack, and pull each side of the connector apart, without twisting, to unplug.
      • Color Display and Remote
      • Battery 
      • Wiring harness
   2. Inspect the inside of the connector. If the inside is damaged, dirty, or wet, the part may need to be replaced. Take a photo and contact Customer Support for help.
   3. Plug the connector back in by lining up the arrows on the connectors, and push together without twisting.
   4. Reinstall the battery, turn the bike on, and check whether the error is resolved. Repeat the process for each cable one at a time to try and isolate the source of the error.
   5. To access the Battery and Wiring Harness connectors you will need to remove the Controller installed in the frame downtube. Turn the bike over and rest the handlebars on wooden blocks or a towel to protect the Color Display. Use a 3 mm Allen wrench to remove the frame cable cover and controller cover from the underside of the down tube. Use the Allen wrench to remove the mounting bolts on the rear of the controller, and then pull the controller out to inspect the connections.

      Remove controller mounting bolts

      Remove controller

4. Inspect the remaining cables.  If the error continues, continue troubleshooting to isolate the part that may be causing the error. The process for checking the connectors below will involve unplugging the connector and turning the ebike back on to check if the error continues while the connector is still unplugged. 
   1. Unplug each of the following cables (see diagram) one at a time. Pull each side of the connector apart, without twisting, to unplug.  
      • Front brake sensor
      • Rear brake sensor
      • Throttle
      • Headlight
      • Pedal Assistance Sensor (PAS)
      • Motor (mounted on the chainstay on the drive side of the bike)
      • Taillight
   2. Inspect the inside of the connector. If the inside is damaged, dirty, or wet, the part may need to be replaced. Take a photo and contact Customer Support for help.
   3. Leave the cable unplugged and reinstall the battery, turn the bike on, and check whether the error is resolved.
   4. Repeat the process for each cable one at a time to try and isolate the source of the error.
   5. If the issue persists after checking all cable connections, contact Customer Support.
5. Reinstall the controller. If you resolve the issue, reinstall the controller and use the Allen wrench to reinstall the mounting bolts until secure.
6. Reinstall the wiring covers. Use the Allen wrench to reinstall the controller cover and frame cable cover and tighten the mounting bolts until secure.
   1. Replace any snipped zip ties. Use flat-side cutters to snip off zip tie excess, and ensure the cut is flush and smooth with no sharp point.
   2. Check that all cables are out of the way of moving parts, and turn the handlebar to ensure that it can move freely.
7. Reinstall the battery, test the bike fully, and ride Rad!