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Subaru Legacy Owners Manual: Electronic Brake Force Distribution (EBD) system

Subaru Legacy Owners Manual / Starting and operating / Electronic Brake Force Distribution (EBD) system

The EBD system maximizes the effectiveness of the brakes by allowing the rear brakes to supply a greater proportion of the braking force. It functions by adjusting the distribution of braking force to the rear wheels in accordance with the vehicle's loading condition and speed.

The EBD system is an integral part of the ABS and uses some of the ABS components to perform its function of optimizing the distribution of braking force. If any of the ABS components used by the EBD function fails, the EBD system also stops working.

When the EBD system is operating, you may hear a chattering noise or feel a slight vibration in the brake pedal. This is normal and does not indicate a malfunction.

Steps to take if EBD system malfunctions

Vehicle Dynamics Control system

If a malfunction occurs in the EBD system, the system stops working and the brake system warning light and ABS warning light illuminate simultaneously.

The EBD system may be malfunctioning if the brake system warning light and ABS warning light illuminate simultaneously during driving.

Even if the EBD system fails, the conventional braking system will still function.

However, the rear wheels will be more prone to locking when the brakes are applied harder than usual and the vehicle's motion may therefore become somewhat harder to control

If the brake system warning light and ABS warning light illuminate simultaneously, take the following steps.

  1.  Stop the vehicle in the nearest safe, flat location.
  2.  Apply the parking brake and turn off the engine.
  3.  Restart the engine.
  4.  Release the parking brake.

Even if both warning lights turn off: The EBD system may be malfunctioning.

Drive carefully to the nearest SUBARU dealer and have the system inspected.

If both warning lights illuminate again and remain illuminated after restarting the engine:

  1.  Turn off the engine again.
  2.  Apply the parking brake.
  3.  Check the brake fluid level. For details about checking the brake fluid level, refer to "Checking the fluid level" F11-20.
  •  If the brake fluid level is not below the "MIN" mark, the EBD system may be malfunctioning. Drive carefully to the nearest SUBARU dealer and have the system inspected.
  •  If the brake fluid level is below the "MIN" mark, DO NOT drive the vehicle.

    Instead, have the vehicle towed to the nearest SUBARU dealer for repair.

WARNING
  •  Driving with the brake system warning light on is dangerous.

    This indicates your brake system may not be working properly. If the light remains on, have the brakes inspected by a SUBARU dealer immediately.

  •  If at all in doubt about whether the brakes are operating properly, do not drive the vehicle.

    Have your vehicle towed to the nearest SUBARU dealer for repair.

ABS (Anti-lock Brake System)
WARNING Always use the utmost care in driving - overconfidence because you are driving with an ABS equipped vehicle could easily lead to a serious accident.   ...

Vehicle Dynamics Control system monitor
WARNING Always use the utmost care in driving - overconfidence because you are driving with a Vehicle Dynamics Control system equipped vehicle could easily lead to a serious a ...

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