In this guide, we will show you step by step how to replace the controller (electronics) on your VMAX e-scooter yourself.
Required tools
- 2.5 mm Allen key
- 3 mm Allen key
- 3.5 mm Allen key
- Phillips screwdriver
- Spare part: Controller / electronics
- Optional: Spray adhesive or suitable glue for the rubber deck
Instructions
Remove the rubber deck
First, carefully remove the rubber deck from the footboard to gain access to the service hatch.
Work slowly to prevent damaging the rubber deck.
Open the service hatch
Remove all six 2.5 mm Allen screws from the service hatch.
Then, open the service hatch in the footboard.
Disconnect electrical connections
First, disconnect the cable from the electronics to the battery.
Then, gently pull apart the connectors of the wiring harness.
Tip:
Take a photo of the wiring before unplugging the cables. This way, you'll know which connector goes where during reassembly.
Loosen side cover
Use a 3.5 mm Allen key to loosen the two screws on either side of the footrest.
Additionally, remove the screws under the footrest with a Phillips screwdriver.
Disconnect turn signal and charging socket
Carefully loosen the rubber deck at the edge of the footrest.
Then, pull out the side cover.
Disconnect the connectors from both turn signals and from the charging socket.
Disconnect motor cable
Then, remove the rear cover on the right side of the vehicle. Loosen the 3 screws with a 3 mm Allen key.
Disconnect the motor cable and gently pull it towards the electronics.
Remove the controller
Loosen the two nuts on the side of the electronics that secure the controller.
Then, carefully take the controller out of the housing.
Install new controller
Insert the new controller into the housing and position it correctly.
Then, secure it again with the two nuts.
Reconnect cable connections
Now reconnect all previously disconnected cables.
This includes connectors for:
- Motor
- Turn signals
- Charging socket
- Wiring harness
- Battery connection
Ensure that all connectors are fully inserted.
Perform functional check
Before you fully close the e-scooter again, perform a functional check.
Turn on the e-scooter and check the following functions:
- Throttle
- Taillight
- Left and right turn signals
- Motor function
If everything works correctly, you can begin reassembling.
Reassemble the e-scooter
First, reattach the side cover on the right side of the vehicle.
Then, close the service hatch with the six 2.5 mm Allen screws.
Then, position the rubber deck correctly on the footboard again.
If necessary, you can use some spray adhesive or suitable glue to securely attach the rubber deck again.
Frequently Asked Questions
Here you can find answers to common questions about replacing the controller.
The e-scooter does not start after the replacement – what can I do?
First, check all connectors. Often a connector is not fully engaged or the battery cable has been forgotten to be reconnected.
Do I need to adjust anything after replacing the controller?
Generally not. If all cables are correctly connected, the controller should work immediately.
What to do if a connector is difficult to disconnect?
Always pull connectors straight and without force. If necessary, move them slightly back and forth to loosen.