Giant SyncDrive and RideControl troubleshooting

This page is for Giant e-bikes with a SyncDrive motor and a RideControl remote or display, such as the RideControl Ergo, Ergo 2, Ergo 3, Go and Dash, and the RideDash EVO display, powered by a Giant EnergyPak battery. Giant's e-bike manual covers these parts (Giant e-bike manual). See also our systems overview.

Before you start

• Get the manual for your bike. Giant's manuals page lists its e-bike manuals by version, plus guides for EnergyPak batteries, chargers, RideDash displays and the RideControl app.
• Know what an event looks like. On most system events, assist stops but the bike still rides as a normal bike (Giant e-bike manual).

Common problems and what to check

Giant's quick troubleshooting steps

Giant gives the same first steps for any event (Giant e-bike manual):

1. Note which light is blinking or what the event message says.
2. Switch the system off.
3. Look for an obvious cause, such as a battery that isn't seated properly.
4. Fix it only if that is easy and safe.
5. Switch the system back on.

If that fixes it, you can keep riding, but book a check with an authorized Giant dealer. If the event comes back, repeat the steps. If it stays, stop riding and contact a dealer.

Won't turn on, or assist stops

• Make sure the EnergyPak is in place and locked, then check its charge (Giant e-bike manual).
• Giant says assist drops to the lowest level below 3% charge and shuts off below 1%, while the lights keep working for at least 2 hours.
• More steps: e-bike won't turn on and no pedal assist.

Speed sensor event

• The remote shows a speed sensor issue or error. Giant gives no extra steps beyond the quick steps above, so work through those and see a dealer if it stays. Our align speed sensor magnet guide shows what a sensor and magnet look like.

Heat or overheating event

• Ergo and Ergo 2 remotes show a heat issue, and on the RideControl Go code 5 means the motor overheated (Giant e-bike manual). Follow the quick steps above, and see a dealer if it keeps happening.

Won't charge, or range has dropped

• Charge at room temperature, about 20 °C (68 °F). Giant says charging below 0 °C or above 40 °C (32 °F to 104 °F) can give a poor charge and shorten battery life (Giant e-bike manual).
• The RideControl app shows your charge and estimated range on its riding screen.
• See battery won't charge and battery drains fast.

Error codes

Giant lists system events by which light blinks, not by a numbered code (Giant e-bike manual). Codes differ by remote, so check your own manual.

RideControl Ergo (assist lights blink):

• F1: battery issue
• F2: motor issue
• F3: speed sensor issue
• F5: heat issue

RideControl Ergo 2 (assist lights blink):

• I1: battery issue
• I2: motor issue
• I3: speed sensor issue
• I5: heat issue

RideControl Go (red lights blink):

• 1: EnergyPak error
• 2: SyncDrive error
• 3: speed sensor error
• 4: Smart Gateway, remote or display error
• 5: motor overheated

On RideControl Dash and RideDash EVO, a warning screen describes the event for 5 seconds and a wrench icon stays in the status bar. See also e-bike error codes.

Cleaning and storage

• Clean with a soft cloth or brush and a little neutral cleaner, then dry it. Don't use a pressure washer or high pressure air, which can force water into sealed electrical parts (Giant e-bike manual). See e-bike got wet.
• For long storage, take the EnergyPak off the bike and keep it dry between -20 °C and 20 °C (-4 °F to 68 °F) at about 60% charge. Check it monthly, top it up when it falls below 60%, and charge it to 60% at least every 3 months. See store your battery for winter.

Firmware and updates

Giant's manual doesn't give a rider update procedure. It says RideControl app features depend on your parts' firmware version, so ask your dealer about updates (Giant e-bike manual).

Official help

• Giant manuals for e-bikes, EnergyPak batteries, chargers and displays.
• Giant e-bike manual with system events and troubleshooting.
• RideControl app manual.

Videos

When to get a pro

• An event that stays after the quick steps, or keeps coming back.
• A wrench icon on the display, or periodic service that is due.
• Warranty claims, which Giant says go through an authorized dealer with proof of purchase.
• Anything inside the motor, battery or wiring.

Sources

• E-bike manual V9.0, US English, Giant
• Manuals, Giant Bicycles
• RideControl app user manual V2.0, Giant

Stuck after these checks? Find a shop near you.