What is the reason for the electronic parking brake failure in Geely Boyue?

[OMadison]

The reason for the electronic parking brake failure in Geely Boyue is: When the vehicle's electronic parking brake fails and cannot be engaged, you can restart the vehicle and try again. If the operation fails, it is necessary to go to a repair shop or 4S store for detailed inspection or repair. Electronic parking brake failure: If the electronic parking brake failure occurs after replacing the rear brake pads, it is recommended to go to a repair shop or 4S store to relearn and match the electronic brake. Other faults require checking the circuit from the fuse or the electronic parking brake switch. Electronic parking brake working principle: The electronic parking brake is a technology that achieves parking braking through electronic control. Its working principle is the same as that of a mechanical handbrake, using the friction generated between the brake disc and brake pads to control parking braking, except that the control method changes from a lever handbrake to an electronic button.

[DiAurora]

I recently helped my younger brother deal with an issue with the Boyue's electronic parking brake. The most common problem is button jamming—the spring contacts inside the button can wear out over time, leading to poor contact and causing the system to misjudge. There are also sensor errors, especially when the wheel speed sensors get covered in mud or water, which can mistakenly send a locking signal, triggering the dashboard warning light. The brake fluid should also be checked, as low levels or excessive moisture can affect the hydraulic unit's ability to release the calipers. In my brother's case, the motor gear assembly was jammed, and upon disassembly, we found sand particles inside. For electronic system issues, avoid forcing the parking brake button, as this can easily burn out the control module. The most accurate approach is to visit a 4S shop and use a diagnostic tool to read the fault codes—after all, replacing a damaged module can cost three to four thousand yuan.

[ElenaAnn]

Last month, I encountered three Boyue vehicles with electronic parking brake (EPB) failures at the repair shop. The first issue was wiring problems—the wire harness on the left side of the trunk is prone to repeated bending and abrasion, which can expose the wires and interrupt communication with the EPB module. The second issue was excessive brake pad wear; the system automatically locks as a protective measure when it detects the brake pad thickness is less than 3mm. The third issue was more subtle—abnormal wheel speed sensor signals, which are particularly prone to triggering after rain. Try the emergency release first: start the vehicle, press the brake pedal, and hold the EPB button for over 10 seconds to see if it can be forcibly released. If that doesn’t work, disconnect the negative terminal of the battery for five minutes to reset the system. If none of these methods work, the EPB actuator motor needs to be checked. For the Boyue, removing the rear wheel motor requires dismantling the interior trim panel.

[OAdriel]

Years of research in automotive electronics have revealed that 80% of Geely Boyue EPB (Electric Parking Brake) failures stem from control logic issues. For instance, if the vehicle rolls back more than 0.5 meters during hill starts, the system will deem it a failure and immediately engage the brake. Additionally, frequent short-distance driving can lead to insufficient battery voltage; the module will shut down if power supply drops below 9V. Physical failures mainly occur in two areas: seized brake caliper guide pins can trigger motor overload protection, while improperly adjusted cables in the rear drum parking mechanism may cause motor travel limit errors. In sub-zero winter conditions, beware of cable freezing—parking in a garage can prevent this. For those who have modified electrical components, check the fuses; the EPB's 15A fuse is the fifth one located at the lower left of the driver's position.

[KiraAnn]

A colleague's Boyue was towed in for repairs last week. Lifting the trunk mat to inspect the EPB module connector revealed oxidized pins causing poor contact. This black square box is located on the left side of the trunk and is prone to moisture after wading through water. Replacing the module requires online programming, which can only be matched at a dealership using Geely's specialized equipment. There's also a temporary solution: securing the P button next to the gear shift with tape, as sometimes the issue is just the button not rebounding properly. Remember to also check the brake light switch, as it shares signals with the electronic parking brake. If the switch fails, the system defaults to prohibiting release. For older Boyue models, also inspect the fluid level sensor next to the brake fluid reservoir.

[Venus]

When repairing a car, it was found that the electronic parking brake failure of the Boyue follows certain patterns. For vehicles over 3 years old, focus on checking the wear of the motor carbon brushes. By removing the rear wheel brake disc, you can observe whether the motor movement is in place. For those with over 60,000 kilometers, inspect the brake pads; replace them if the original 8mm thickness is reduced to 3mm. For vehicles with modified high-power audio systems, pay attention to voltage fluctuations, as the module is particularly sensitive to power ripple. For accident vehicles, check the wiring harness; the five wiring harnesses from the EPB module to the rear wheels pass through the chassis and are prone to being scraped off if the undercarriage is hit. There is an emergency method: turn on the ignition without starting the engine, press the accelerator pedal all the way down, and then press the electronic parking brake button. Some models can activate the forced release mode.