Mazda 3 & CX-30 (2019-2023)Rear E-Brake Disengagement & Maintenance Mode (For Rear Brake Change!)

Introduction

This tutorial will guide you through the process of entering maintenance mode to disengage the electronic parking brake (e-brake) on Mazda 3 and CX-30 models from 2019 to 2023. This is essential for safely changing your rear brakes and compressing the caliper pistons. Following these steps will help ensure that the brake maintenance is performed correctly and efficiently.

Step 1: Prepare Your Tools and Vehicle

Before starting, gather the necessary tools and ensure your vehicle is ready for maintenance.

• Tools needed:

  • OBD-II scanner or specific tool to enter maintenance mode
  • Jack and jack stands
  • Lug wrench
  • Brake cleaner
  • New brake pads and rotors (if applicable)

• Vehicle preparation:

  • Park the vehicle on a flat surface.
  • Engage the regular parking brake (not the e-brake).
  • Turn off the ignition and make sure the vehicle is in "Park" mode.

Step 2: Connect the OBD-II Scanner

To enter maintenance mode, you need to connect an OBD-II scanner that is compatible with your Mazda model.

• Locate the OBD-II port, typically found below the dashboard near the steering column.
• Plug in the scanner and turn on the vehicle's ignition (do not start the engine).
• Follow the scanner's instructions to access the braking system settings.

Step 3: Enter Maintenance Mode

Once connected, you need to navigate through the scanner to enter maintenance mode.

• Select the "Electronic Parking Brake" option from the menu.
• Look for the "Maintenance Mode" setting.
• Activate maintenance mode by following the prompts on the scanner.

Step 4: Disengage the E-Brake

With maintenance mode activated, you can now safely disengage the e-brake.

• Confirm that the e-brake is disengaged by checking the brake indicator light on the dashboard.
• If necessary, manually release the e-brake by following the prompt on the scanner, or by using the brake pedal.

Step 5: Change the Brakes

Now that the e-brake is disengaged, you can proceed with the brake change.

• Lift the vehicle using a jack and secure it with jack stands.
• Remove the rear wheels using the lug wrench.
• Detach the brake caliper and old brake pads.
• If replacing rotors, remove the rotor as well.
• Install new brake pads and rotors if applicable.
• Reattach the caliper securely.

Step 6: Re-Engage the E-Brake

After completing the brake change, it's important to re-engage the e-brake.

• Return to your OBD-II scanner and exit maintenance mode.
• Follow the scanner’s instructions to re-engage the e-brake.
• Confirm that the e-brake is functioning properly by checking the indicator light.

Conclusion

You have successfully entered maintenance mode, disengaged the e-brake, changed your rear brakes, and re-engaged the e-brake on your Mazda 3 or CX-30. Always remember to double-check your work and ensure everything is securely fastened before lowering your vehicle. Regular brake maintenance is crucial for safety, so consider making this a part of your vehicle upkeep routine. If you encounter any issues, refer to your vehicle's manual or consult a professional mechanic.