Your vehicle has two separate circuit brake systems. Each circuit works diagonally across the vehicle. If one circuit of the brake system should fail, the other half of the system still works. If one circuit fails, the brake pedal will go down much closer to the floor than usual and you will need to press it down much harder. And a much longer distance will be needed to stop the vehicle.
Brake booster
The brake booster uses engine manifold vacuum to assist braking force. Do not turn the ignition switch to the "LOCK"/ "OFF" position while driving because that will turn off the brake booster, resulting in poor braking power.
The brakes will continue to work even when the brake booster completely stops functioning. If this happens, however, you will have to depress the pedal much harder than normal and the braking distance will increase.
Brake system
Brake assist systemRemoval
LIGHTING SYSTEM > SRF OFF SwitchREMOVAL1. Disconnect the ground cable from battery. NOTE">2. Remove the cover assembly - instrument panel LWR driver OUT. Instrument Panel Lower Cover > REMOVAL">3. Release the claws, and then remove the cover.4. Release the claws and remove th ...
Location
VEHICLE DYNAMICS CONTROL (VDC) > Relay and FuseLOCATIONMain fuse boxFuse 50A (VDC CM&H/U)(A)Fuse 30A (VDC CM&H/U)(B)NOTE:For other related fuses, refer to the wiring diagram. Power Supply Circuit"> ...
System operation
Operating conditions
The BSD/RCTA system in the Subaru Ascent functions only when specific operating
requirements are satisfied. These conditions ensure accurate detection and reliable
system performance.
The ignition switch of the Subaru Ascent is in the "ON" position.
The BSD/ ...