tuningblog.eu Your magazine about tuning the car
Recently updated on November 29, 2023 at 11:32 am
The electronic parking brake was introduced in 2001 and has since found its way into a constantly growing number of vehicle models. The classic, mechanical handbrake, on the other hand, is being used less and less - in Mercedes models it is disappearing accordingly foot parking brake. However, electronics instead of mechanics also lead to increased maintenance costs: Brake discs and brake pads can no longer be replaced and renewed in the conventional way. Through a so-called "Motor on caliper system“ – i.e. an electric motor on the brake caliper – the brake pistons are controlled directly and they press the pads against the brake discs. This electric parking brake, controlled by an electric servomotor, must be addressed when servicing the rear axle brake system. A suitable control unit is used for the necessary diagnostics.
the preparation
In addition to an electronic parking brake, more and more modern vehicles also have one Indicator, which provides information about the condition of the brake pads and when the wear limits have been reached. If you are informed by the brake system about worn brake pads, a few crucial points must be made in are observed when working on the brake system. The parking brake tolerated about not too low voltage, so the vehicle battery should be connected to a charger to guarantee the necessary minimum voltage. Perfect functionality of the control system is required when working on the brake system. Can the EPB be easily activated and released again? System errors should already have a diagnosis in advance be excluded. The vehicle must also be on a lift to perform work on the rear brakes. To do this, the ignition switched on, the Parking brake deactivated and the Rear wheels removed .
Service Instructions: Open EPB
To change the slips, the electronic parking brake be opened – so in the service position to be brought. Then the diagnostic connection (Diagnostic Interface) of the vehicle must be equipped with a Service PC/notebook, scanner or OBD dongle get connected. If the connection is established, the Ignition activated and Diagnostic program started.
Our guide is usually on most service devices apply. However, various menu items/work steps may differ!
The respective vehicle is then selected from the list of vehicles or (if possible) a new one is created. Now select the last diagnosis made or, if necessary, start a new one. The "Maintenance/Work in progress etc." dialog box is usually displayed. Then the appropriate Select braking system. In the following the point "open electronic parking brake“ and thus move the servomotor on the brake caliper back to the open initial position. This step must be done first! Under no circumstances should the brake pistons be reset manually, otherwise critical damage to the electric parking brake and injuries may result. For security reasons, you should also wait at least 30 seconds after opening the EPB wait and turn off the ignition.
Maintenance: Change brake pads and brake discs
By deactivating the EPB, the brake pistons can now be pushed back into the brake caliper using a suitable tool. Afterwards you can the brake pads or and the brake discs change.
Service: Close EPB
After replacing pads and/or discs, the service position of the EPB must be restored disabled and the parking brake via the diagnostics menu getting closed. The procedure here is analogous to the opening process of the EPB:
- Switch on ignition
- connect interface
- Select vehicle and diagnosis
Via the menu item "Maintenance/work in progress etc." choose the braking system, then via "Close electronic parking brake or similar." move the servomotor back to the starting position on the brake calliper. Then the parking brake recalibrate – i.e. adjust the brake pistons to the new pads and/or discs so that the EPB works properly.
Finalize, recalibrate and exit EPB maintenance
With a diagnostic tool, the electronic parking brake can be quickly and easily (re)calibrated, opened and closed will. To do this, the "Maintenance/Service etc." menu is opened again in the diagnosis menu and the corresponding braking system is selected. Then via the sub-item "calibrate electronic parking brake“ start the automatic calibration. The system check then starts and, if necessary, information and/or possible errors are displayed. Again, an activated ignition is usually required for the duration of the calibration, but under no circumstances a running engine!
With a click on "next/continue etc.", the recalibration started. The parking brake servomotor can then be heard briefly and a few seconds later the calibration is complete. Clicking on "OK/complete etc." completes the process and the brakes have been serviced. As a final check, a new system check should be started. For this purpose, a new, last automatic diagnosis is carried out and attention is paid to error codes. If this final diagnosis runs smoothly, the diagnosis cable can be disconnected and the ignition turned off. The wheels are then remounted and the vehicle can be lowered.
Of course, the way differs from vehicle to vehicle and from diagnostic tool to diagnostic tool. Therefore the following are a few more videos of common vehicles and diagnostic devices such as VCDS, Carly & Co.
Reset EPB electric caliper with VCDS
Reset EPB Electric Brake Caliper with Carly
Reset Electric Handbrake (EPB) VW AUDI SEAT SKODA
Opel Astra K – Parking Brake Service Mode | manual method
Mazda CX5 electric parking brake service position
The following note is essential: For safety reasons, tuningblog recommends all repair, inspection and maintenance work exclusively to be carried out in a specialist workshop! Although our information is summarized to the best of our knowledge and belief, we cannot assume any liability for the content. All information is therefore "without guarantee".
Summary information on the topic:
Since the introduction of the electronic parking brake In 2001, modern vehicles experienced a change from the mechanical handbrake to the electronic version. Mercedes models in particular are increasingly forgoing the conventional foot parking brake. With the advent of the electric parking brake However, it is essential to know special procedures, for example Reset electric handbrake. When changing the brake pads or brake discs, resetting the electric brake often a challenge.
Particular attention should be paid to brand specifics: how to use them, for example BMW electric parking brake resets without tester or the Honda Civic electric handbrake resets. Workshops now not only have to use the BReset the brake piston on the electric handbrake, but also ensure that the battery has the correct voltage and the diagnostic tools are used correctly. At a VW, reset the electronic parking brake often requires specialized equipment. With today's diagnostic tools, many of the above steps can be performed easily and efficiently as long as the technician is familiar with the vehicle model requirements.
