I'm going out soon to try the regular driving mode and see if I still get the sound when braking.I vaguely remember something about the OPD system using actual brakes in aggressive situations; could they be activating for you? What if you turn off OPD and brake aggressively yourself -- same sound? I'm kind of wondering if there's some obstruction on your rotors/pads/etc and actually applying brakes in motion is creating this sound.
Thanks for the advice. I'm with you on OPD -- only issue is when I get back in my ancient 4Runner, it's hard to switch back to actually using the brakes.In my unspoken theory that some grit or debris was in/around the rotors/pads -- If you're mechanically inclined, I might inspect the rotors for scoring/damage, which might mean putting it on jacks to either remove the wheel and look at the back of the rotors or just crawl under and inspect them from under. Might be able to do it all without jacking it up. While there's not much one can do about it without replacing rotors/pads, it might give you some answers.
I'm actually curious to put it up on ramps and see all the bits underneath. So very different from the ICE's I've lived with (and shade-tree-mechanic'ed) since I started driving many years ago.
I hope you get it sorted out. I'm getting to where I never touch the brake pedal now, I have a good sense for how soon to let off the go pedal
brakefor a stop line, etc. I LOVE the OPD mode.