Why is the ABS light on my CFMOTO 400nk constantly flashing?
2 Answers
CFMOTO 250sr ABS light flashing is caused by improper adjustment of the brake light switch or poor internal contact of the brake light. How to handle it: Start the engine, press the brake pedal, use your finger to push the brake switch linkage all the way down, then release the brake pedal to complete the self-setting position. Replace the brake light switch. ABS working principle: During braking, ABS quickly determines the wheel lock-up state based on the speed signals from each wheel speed sensor, closes the normally open input solenoid valve on the wheel that is starting to lock up, and keeps the braking force unchanged. If the wheel continues to lock up, the normally closed output solenoid valve is opened, and the braking pressure on that wheel rapidly decreases due to the direct connection to the brake fluid reservoir, preventing the wheel from completely locking up due to excessive braking force. This keeps the braking state always at the optimal point (slip ratio S of 20%), achieving the best braking effect and the highest driving safety. ABS function: Fully utilizes the effectiveness of the brake, shortening braking time and distance. Effectively prevents vehicle skidding and fishtailing during emergency braking, ensuring good driving stability. Allows steering during emergency braking, providing good steering control. Avoids severe friction between tires and the ground, reducing tire wear.
The constant flashing of the ABS light on the CFMoto 400NK is quite annoying. With over a decade of motorcycle repair experience, common causes include sensor failures—such as a dirty wheel speed sensor or blockage by mud, which interrupts signal transmission and triggers the light. Another possibility is issues with the electronic control unit, where internal short circuits or software errors in the ABS module can cause fault codes to illuminate. Loose wiring connections are also a culprit, especially after riding in the rain when water corrodes the connectors. It's recommended to first use a simple diagnostic tool to read the fault codes and identify the specific issue. You can check the cleanliness of the front and rear wheel sensors yourself, but most cases require professional tools for repair. Don’t forget that the ABS system is the core of anti-lock braking—once it fails, braking becomes prone to skidding, which is very dangerous. It’s safer to make time for a check-up at an authorized dealership.
