Electronic Parking Brakes (EPB) have become a standard feature in modern vehicles, offering enhanced safety and convenience compared to traditional handbrakes. But when it comes to vehicle maintenance, especially brake pad replacement on cars equipped with EPB, things get a bit more complex. That’s where an Obd2 Scanner With Epb functionality becomes indispensable. This article will explore what EPB is, how it works, and why you need a specialized OBD2 scanner to handle EPB system maintenance, particularly when replacing brake pads. We’ll also introduce some of the best Foxwell scanners that offer robust EPB support.
Understanding Electronic Parking Brake (EPB)
The Electronic Parking Brake (EPB) system is a modern evolution of the conventional parking brake. It’s an electronically controlled system that manages both temporary braking while driving and secure parking. Instead of a manual handbrake lever or foot pedal, EPB is activated with a simple push of a button or flick of a switch. This electronic activation engages the brakes, usually on the rear wheels, using an Electronic Control Unit (ECU) and an actuator mechanism.
There are two primary types of EPB systems prevalent in today’s vehicles:
- Cable Puller Systems: These systems operate similarly to traditional handbrakes, utilizing cables to apply the brakes. However, the manual lever is replaced by an electronic switch and motor. When activated, the system pulls the cables to tighten the brake pads against the rotors or drums. This type is adaptable to most modern vehicles, regardless of whether they use disc or drum brakes, and offers a cost-effective solution for manufacturers.
- Caliper Integrated Systems: This more sophisticated system integrates a small electric motor directly into the brake calipers. These motors directly drive the caliper pistons to engage or disengage the parking brakes, eliminating the need for cables and levers. While offering a more refined and often quicker operation, caliper integrated systems are typically more expensive and are exclusively used with disc brake systems.
Alt: Diagram illustrating the components of an Electronic Parking Brake system in a modern vehicle.
How EPB Systems Function
Traditional parking brake systems rely on a mechanical connection – a cable linking the handbrake lever to the brake pads. Pulling the lever increases cable tension, forcing the brake pads to engage and stop the wheels. In contrast, an Electronic Parking Brake system is a more sophisticated setup comprised of three key components:
- Electronic Brake Module: This is the brain of the EPB system, receiving commands from the driver and controlling the actuators.
- Actuator/Electric Motor: These are the muscles of the system, physically applying the brake force at the calipers.
- Electric Switch in the Cabin: This is the user interface, allowing the driver to effortlessly engage and disengage the parking brake.
When the driver operates the EPB switch, a signal is sent to the Electronic Brake Module. Upon recognizing the request for parking brake activation, the module instructs the actuators or motors at the calipers to clamp down on the brake discs. This clamping action effectively stops the wheels from rotating.
The electronic nature of EPB systems provides enhanced efficiency and reliability compared to their mechanical predecessors. The lack of a direct mechanical linkage also contributes to improved brake system robustness and reduces wear and tear on components.
Alt: Close-up view of Electronic Parking Brake components highlighting the electronic control module and caliper motor.
Why an OBD2 Scanner with EPB Release Function is Essential
While EPB systems offer numerous advantages, they introduce a new requirement when performing brake maintenance, particularly brake pad replacement. Unlike traditional brakes where calipers can be manually retracted, EPB systems often require electronic retraction of the calipers to provide sufficient space to replace brake pads. This is because the EPB motors apply constant pressure to the brake system.
To retract the calipers electronically, you need a specialized tool – typically an OBD2 diagnostic scanner equipped with EPB service functions. This scanner sends commands to the EPB system, instructing it to enter a “service mode” or “workshop mode.” In this mode, the scanner commands the EPB system to retract the calipers, creating the necessary clearance for removing old brake pads and installing new ones.
Once the brake pad replacement is complete, the OBD2 scanner is again used to command the EPB system to exit service mode. This process recalibrates the EPB system and reapplies the correct pressure to the new brake pads, ensuring proper parking brake function. Without an OBD2 scanner with EPB release function, attempting to replace brake pads on many modern vehicles can be challenging, if not impossible, and could potentially damage the EPB system.
Alt: Mechanic using an OBD2 scanner to perform Electronic Parking Brake service function during brake pad replacement procedure.
Top Foxwell OBD2 Scanners with EPB Service
Foxwell is a well-regarded brand known for producing high-quality, feature-rich OBD2 scanners that cater to a range of users from DIY enthusiasts to professional technicians. Their scanners with EPB service capabilities are particularly valuable for anyone working on modern vehicles. Foxwell EPB tools are designed to:
- Diagnose EPB system faults
- Read and clear EPB fault codes
- Display live EPB system data
- Perform active tests on EPB components
- Execute EPB service functions (Workshop Mode/Service Mode) for brake pad replacement and system reset
Here are three recommended bi-directional Foxwell scanners that include comprehensive EPB functionality:
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Foxwell NT530: Priced at $179, the NT530 is an excellent entry-level OBD2 scanner offering OE-level diagnostics. It provides a user-friendly interface and comprehensive EPB service functions, making it ideal for DIYers and car enthusiasts who perform their own maintenance. Foxwell NT530 Link
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Foxwell NT809: Stepping up in features and capabilities, the Foxwell NT809, at $459, is a powerful diagnostic scan tool suitable for both enthusiasts and professional technicians. With its advanced hardware and touchscreen interface, the NT809 delivers a fast and reliable diagnostic experience, including advanced EPB functions and broader vehicle coverage. Foxwell NT809 Link
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Foxwell GT60 Plus: For professional automotive repair facilities, the Foxwell GT60 Plus, priced at $899, is a top-tier diagnostic device. It boasts extensive diagnostic capabilities, advanced data management features, and robust EPB service functions. The GT60 Plus is designed to streamline workflow and enhance efficiency in demanding shop environments. Foxwell GT60 Plus Link
For a complete overview of Foxwell OBD2 scanners with EPB capabilities and to compare features, refer to the Foxwell Scan Tool Comparison Chart.
Investing in an OBD2 scanner with EPB functionality is a smart move for anyone who owns or services modern vehicles equipped with electronic parking brakes. It simplifies brake maintenance, ensures proper system function, and can save time and money in the long run. If you have any questions about choosing the right OBD2 scanner with EPB for your needs, feel free to leave a comment or contact us via email.
