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
• 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 Product Support for help. If the contacts are in good condition, set the battery aside for now.
3. Remove the wiring covers. Use a 3 mm Allen wrench to remove the frame cable cover and controller cover from the underside of the down tube.
4. Inspect the wiring harness cables. Carefully pull the wiring harness cables forward through the frame opening to expose the connectors. The rear brake and shifter cables are routed separately through the frame cable cover.
   • Unplug each of the following cables (see diagram) one at a time. Snip any nearby zip ties if you need cable slack, and pull each side of the connector apart, without twisting, to unplug.
     • Front brake sensor
     • Rear brake sensor
     • Throttle
     • Color display
     • Remote
     • Headlight
   • 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 Product Support for help.
   • Plug the connector back in, reinstall the battery, turn the bike on, and check whether the error is resolved. Repeat the process for each cable to try and isolate the source of the error.
   •  If the wiring harness cables are not the source of the error, route the cables back into the frame opening and proceed to check the connections to the controller at the bottom of the down tube (see diagram).
5. Inspect the controller cables. Use the Allen wrench to remove the mounting bolts on the rear of the controller, and then pull the controller out to inspect the cable connections.
   • Unplug each of the following cables (see diagram) one at a time. Snip any nearby zip ties if you need cable slack, and pull each side of the connector apart, without twisting, to unplug. The motor connector will require you to unscrew the connectors before pulling apart.
     • Battery
     • Wiring harness
     • PAS
     • Motor (mounted on chain stay)
     • Taillight
   • 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 Product Support for help.
   • Plug the connector back in, reinstall the battery, turn the bike on, and check whether the error is resolved. Repeat the process for each cable to try and isolate the source of the error.
   • If the issue persists after checking all cable connections, contact Rad Power Bikes Product Support.
6. Reinstall the controller. If you resolve the issue, reinstall the controller and use the Allen wrench to re-install the mounting bolts. Use a torque wrench to tighten the mounting bolts to 2-3 Nm.
7. Reinstall the wiring covers. Use the Allen wrench to reinstall the controller cover and frame cable cover and tighten the mounting bolts until secure.
   • 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.
   • Check that all cables are out of the way of moving parts, and turn the handlebar to ensure that it can move freely.
8. Reinstall the battery, test the bike fully, and ride Rad!