When the electronic handbrake system fails and cannot be resolved, basic operations and emergency measures can be taken first for troubleshooting. If ineffective, professional maintenance is required. Firstly, check for any misoperation, such as not wearing a seat belt (some models have safety restrictions lifted), stuck electronic handbrake button, or low battery power (electronic handbrake relies on electric drive); Then try the conventional release method, such as starting the vehicle and shifting to D gear, lightly stepping on the accelerator, pressing the brake pedal, and pressing the handbrake button. At the same time, pay attention to whether the dashboard indicator light is off and whether there is any sound of the air valve operating to confirm the status; If it still doesn't work, some car models have manual release emergency plans (manual transmission is mostly located next to the driver's side pedal, automatic transmission may be hidden in the trunk), or you can contact maintenance personnel to come and operate the spare cable; If the above methods do not work, it is highly likely that the core components such as the parking brake switch, controller, or circuit are faulty and need to be inspected and repaired by a professional repair shop using specialized equipment to avoid disassembling and damaging the vehicle.

When attempting conventional release methods, special attention should be paid to operational details. The method of lightly stepping on the accelerator after starting the vehicle into D gear is essentially a combination of the vehicle's forward power and the logic of the electronic system. If you hear a slight "click" sound from the air valve and the handbrake indicator light on the dashboard goes out, it indicates that the release is successful; If no sound is heard or the indicator light remains on, immediately release the throttle to avoid damaging the braking system during forced driving. When pressing the handbrake button on the brake pedal, make sure to press the brake pedal to the bottom and maintain the button pressing action for 1-2 seconds. Some electronic systems of certain models require sufficient signal triggering time.

The manual release method must be strictly operated in accordance with the vehicle manual. The emergency release device of manual transmission models is often located next to the driver's side pedal, usually a hidden pull rod with a label. When pulling, it needs to be pulled with moderate force to avoid breaking the cable; The manual lever of automatic transmission models may be hidden inside the trunk, and some models require the removal of the trunk trim panel to see it. Before operation, it is necessary to confirm that the vehicle is in a power-off state to prevent the risk of electric shock. If the vehicle is equipped with a spare cable, when contacting maintenance personnel for on-site operation, it is necessary to inform them of the vehicle model and fault situation in advance, so that maintenance personnel can carry appropriate tools and send them for repair as soon as possible after removal. Emergency driving should not be relied on for a long time.

After excluding operations and emergency plans, it is necessary to pay attention to potential issues with the core components of the system. If there is no feedback when the electronic handbrake button is pressed, it may be due to wear on the internal contacts of the switch, and the original switch needs to be replaced; If the dashboard displays a handbrake fault code, it is likely to be a control unit or sensor malfunction. At this time, it cannot be disassembled by oneself, and a professional technician needs to use a diagnostic tool to read the fault code and locate the specific fault point. In addition, a low brake fluid level may also affect the normal operation of the electronic handbrake. You can open the engine compartment to check the level scale of the brake fluid reservoir. If it is below the minimum line, you need to add the same type of brake fluid and try to remove it. If it still cannot be removed after adding it, further maintenance is required.

Finally, regardless of which method is used to release the electronic handbrake, the braking status must be confirmed again after release. Slowly push the vehicle (neutral gear is required for manual transmission), feel whether there is braking resistance, or drive at low speed on safe roads, lightly press the brake pedal to check the brake feedback. If abnormal braking is detected, immediately stop the vehicle and contact maintenance. Do not take chances and drive on the road. Although electronic handbrake faults are common, as long as the principle of "simple first, complex later, emergency first, professional later" is followed, problems can be efficiently investigated and driving safety can be guaranteed.