Are brakes same on all trims / models?

[Brian_B]

There is an “emergency” feature on the EPB — not sure on the exact specifics but if the computer detects brake input and not seeing the vehicle slow as fast as it thinks it should be (or brake line pressure build or something), it will throw the EPB as a last resort. Kind of a failsafe against a broken EBB.

I’ve seen a few reports of that occurring to people on the road - it’s plausible (but again, not knowing specifics) that it could occur while you are trying to do brake maintenance if you trigger whatever the conditions are.

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[DALOLA]

It’s for any type of hydraulic brake repair. The EBB is never necessarily “off” which is why the brake service mode exists and purposely disables the EBB. It’s not only to retract the rear pistons for repairs.

On a vehicle with vacuum brakes, I would agree that the main purpose is simply to retract the rear pistons for repairs.

But on a vehicle equipped with an EBB, it remains partially powered and ready for inputs. It can detect pedal pressure and activate the booster motor if you press the brake pedal hard enough without the key on, or even a key nearby. Brake service mode puts the whole EBB into a non-responsive state to prevent any issues.

That being said, yes there are things you can do sometimes that won’t cause an issue outside of brake service mode. You’re just not supposed to, that’s all.

Some 2.3 Bronco’s also have an issue with the DIY brake service mode procedure.

I haven't tried to put the Bronco into service mode yet, so no idea if it will work. Probably won't even try, the manual method is very easy.

 

[swamp2]

Maybe I'm just slow, but it must have taken me 4-5 tries to get my rig into brake service mode...

 

[Nibroc99]

Unless the Bronco EBA is different than the Maverick (I don't think it is), the EBA is off when the key is off, and has no effect on brake bleeding. Can anyone show evidence the EBA systems operate differently?

For what it's worth, when I apply the brakes with the vehicle off, the EBA is definitely doing work. You can hear and feel the motor working behind the pedal, and I can feel a difference if I disconnect the battery because the pedal is WAY more firm without power.

 

[DALOLA]

For what it's worth, when I apply the brakes with the vehicle off, the EBA is definitely doing work. You can hear and feel the motor working behind the pedal, and I can feel a difference if I disconnect the battery because the pedal is WAY more firm without power.

Well, that would make sense since there is a pedal input, I'm sure the EBA has some kind of mode with key off, 12V live. If there are no inputs, it's inactive.

My point is, the EBA status has no effect on replacing pads or bleeding fluid, ASSUMING of course you don't trigger any inputs during the process. As I mentioned, I've done both on my Maverick without disconnecting the 12V battery, no issues.

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