If the abs unit activates but does not isolate the brake pedal the brake fluid will flow directly into the the accumulator a spring loaded brake fluid container for abs systems.
Abs brake pedal goes to floor.
Check your brake fluid.
If you step on the brake pedal and it has little to no pressure and goes all the way to the floor especially if you re getting no braking.
This lets the pedal sink to the floor.
No brake pressure pedal goes to floor.
Axle bearings hold the brake rotor true without play while they both rotate.
The leak may coming from a brake line or one of the brake calipers.
One of the signs that your brake system is not properly functioning is the brake pedal being soft or spongy which means the pedal goes down to the floor when pushed.
One of the reasons is the brake system loses pressure from an external brake fluid leak.
1 leak from brake line or brake caliper.
If you notice your brake pedal is soft you may wonder what part of the brake system causes this issue.
If the brake pedal sinks to the floor only when the abs unit activates then your isolation valves may be the problem.
If your brake pedal sinks towards the floor when you are stopped while your foot is on the brake or does not feel as firm when the brakes are applied this could indicate you are having some sort of trouble with.
If it s low top it off to the mark on the side of the reservoir.
Reasons your brake pedal goes to the floor.
Technically there are two main causes that would make the brake pedal sink all the way to the floor.
If this bearing goes bad it will allow the brake rotor it move back and fourth which pushes the caliper piston back into the caliper creating an air gap.
Low brake fluid level.