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 system malfunction, 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

Type A

Type B
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 malfunctions, 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" F11-15.
Instead, have the vehicle towed to the nearest SUBARU dealer for repair.
WARNING
This indicates your brake system may not be working properly. If the light remains illuminated, have the brakes inspected by a SUBARU dealer immediately.
Have your vehicle towed to the nearest SUBARU
dealer for repair.
ABS (Anti-lock Brake System)Unlock using PIN Code Access
In the Subaru Ascent, when all doors including the rear gate are securely locked,
it is possible to unlock the driver's door without using the key fob by utilizing
the convenient PIN Code Access feature via the rear lock button.
Rear lock button
NOTE
The Subaru Ascent PIN Code Ac ...
Dtc b1800 short in driver s airbag
AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble CodeDTC B1800 SHORT IN DRIVER’S AIRBAGDiagnosis start condition:Ignition voltage is 10 V to 16 V.DTC detecting condition:• Airbag main harness circuit is shorted.• Airbag module harness (driver’s side) circuit is ...
Manual transmission oil
It is not necessary to check the transmission
oil level. Check that there are no
cracks, damage or leakage. However, the
oil inspection should be performed according
to the maintenance schedule in
the "Warranty and Maintenance Booklet".
Consult your SUBARU dealer for details.
Recommended gr ...