Rad Power Bikes RadRover 6 Plus: error 30 on the display or the bike won't power on

Your RadRover 6 Plus shows error 30 on the display and the remote, or it won't power on at all. Rad publishes a connector check guide for the RadRover 6 Plus (2021) that handles both symptoms the same way: somewhere in the electrical system a connector is loose, dirty, wet or damaged, or a part plugged into the system has failed. The short answer: work through Rad's connector order, starting at the display plugs and the main wiring harness connector behind the seat tube. If reseating doesn't clear the code, Rad's unplug and test method shows which part is to blame.

Most likely cause

Rad's RadRover 6 Plus error 30 guide says loose or damaged connectors can bring up an error message or stop the bike from turning on, and its fix is a full connector check. In its guide for older RadCity bikes, Rad describes error 30 as a communication error (RadCity connector guide).

Rad checks three main connections first: the display connectors, the 11 pin wiring harness connector behind the bottom of the seat tube, and the battery connector under the battery mount.

Other causes to rule out

• A failed part on one branch of the wiring. Rad's isolation test covers the cable from the left crank area, the motor, the taillight, the accessory connector, each brake lever, the throttle, the front accessory port and the headlight. If the code clears with one of them unplugged, that part may be the cause. (Rad guide)
• Dirty, damaged or wet battery or battery mount contacts. Rad says to photograph them and contact Product Support rather than clean or repair them. (Rad guide)
• A completely dead bike with no code: see e-bike won't turn on.

How to confirm

1. Turn the bike off, remove the battery and press and hold the power button to drain leftover power, as Rad's guide says. Don't drop the battery or touch its terminals.
2. Look at the battery and battery mount contacts. Photograph anything dirty, damaged or wet and stop there.
3. Work out whether your bike has a jumper cable. Rad says that if the accessory cable ends in a cap there is no jumper cable, and if it loops back to the harness there is one.
4. Unplug the display connectors, pulling each side straight apart without twisting. Inspect, reconnect with the notch and pins lined up, refit the battery and test.
5. Reach the harness connector behind the bottom of the seat tube by partly loosening the bolts on the external cable cover and turning the handlebar left for slack. Rad says all 11 pins should be clean and straight. After reconnecting, check the handlebar turns fully both ways before you retighten the cover bolts.
6. For the remaining connectors, unplug one, refit the battery and power on with it still unplugged. If the code clears, note the part and contact Rad. If not, reconnect it and move to the next one in Rad's order: left crank area cable, motor (left chainstay), taillight, accessory, each brake connector separately, throttle, front accessory port, headlight.

Fix options

Reseat the display and harness connectors (easy to moderate)

Often all it takes. Rad lists flat side cutters, a 2.5 mm Allen wrench and new zip ties, trimmed flush.

Reseat the battery connector (moderate)

Rad reaches it by removing the four bolts on the internal cable cover and the two battery mount bolts, and it gives a specific order for refitting the round head and flat head mount bolts. Follow the Rad guide closely or have a shop do it.

Replace the part the isolation test points to (moderate, through Rad support)

A throttle, brake lever sensor, light or sensor that clears the code when unplugged is usually replaced as a plug in part. Get the correct part through Rad Product Support with your photos. Never leave a brake sensor unplugged as a workaround, because it is what cuts the motor when you brake.

Replace the harness, display or controller (pro)

If every connector is clean and no single part clears the code, the fault is likely in the harness, display or controller. That is a job for Rad support or a shop.

Parts

• Zip ties
• Main cable (wiring harness)
• E-bike display
• E-bike connectors
• Throttle, Brake cutoff sensor or Pedal assist sensor, only the one the test points to
• E-bike controller (pro only)

Videos

When to get a pro

Get help if you find water, corrosion or burn marks, bent pins, damaged contacts, or if the code stays after the full check. See Rad Power Bikes error codes, inspect and clean connectors and when to call a pro.

Sources

• RadRover 6 Plus error 30 guide, support.radpowerbikes.com
• RadCity connector guide, support.radpowerbikes.com
• support.radpowerbikes.com
• RadRover Wiring Harness Replacement: Rad Tech, youtube.com

Stuck after these checks? Find a shop near you.