What would happen if you press Start/Stop while driving?

[wlong01]

How would you stop the engine if you had one of those runaway car situations like the brakes completely fail or the Audi gas pedal to the floor.
Would the electric parking brake engage while you were moving?
Could you turn the engine off?

 

[ceric]

With Mazda, pressing on the brake overrides the gas pedal (internally).
Many new vehicles have that.
Not sure if that is mandatory nowadays.

You don't want to turn the engine off in that situation...
You would lose your power braking, making it very difficult to slow down.
You have to literally stand on the brake to slow it down.
It happened to me once before.
(engine shut down on highway cruising due to a broken timing belt)

 

[HyFlyer]

I believe you have to press and hold the start/stop to turn off while moving.

I once had my key fob sitting under the parking brake switch and sticking up. I bumped it somehow (at highway speed) activating the parking brake. The car chimed and showed a warning on the dash. IIRC, I would've had to continue to hold the switch up to active the e brake. I pulled the key fob out and pushed the park brake switch back down and it reset and all was happy. (Never put the key fob there again lol)

 

[ADS-B]

I would imagine there must be a sort of safety feature designed to prevent you from shutting off the engine while driving. I never considered doing it but I would adventure to say that the answer is or should be: nothing will happen. Maybe some sounds, visual message on the dashboard.

 

[Conrad 16.5]

I can't comment on the start/stop button and what would happen if it was pressed while driving. But my understanding about the parking brake is that in order to activate it while driving, it has to be pulled up (or back if you prefer) twice. I had asked a question about sliding the ass end of the CX around in the snow using the parking brake and was told that was the way to do it. I haven't tried it though...

 

[Jack Rabbit]

If you want to test it, drive it down a dirt road or a back vacant alley at 10-15 mph and try it and see what happens

 

[wlong01]

If you want to test it, drive it down a dirt road or a back vacant alley at 10-15 mph and try it and see what happens

Maybe, I was just wondering because every once in awhile there's a story about a runaway car. I remember seeing not too long ago a story where a teenager was driving a Lexus (I believe) and he couldn't get it to stop. He dialed 911, luckily he was on a interstate, the cops found him, corralled the car and forced it off the road into a field where it eventually stopped. It would of been so easy for the dispatcher to tell him to press the Start/Stop twice and pull onto the shoulder.

 

[Conrad 16.5]

If you want to test it, drive it down a dirt road or a back vacant alley at 10-15 mph and try it and see what happens

TONS of snow out there right now. If I get a chance, and I remember (a BIG if) I'll give er a go and see what happens.

Hold my beer and watch this!

 

[Conrad 16.5]

Maybe, I was just wondering because every once in awhile there's a story about a runaway car. I remember seeing not too long ago a story where a teenager was driving a Lexus (I believe) and he couldn't get it to stop. He dialed 911, luckily he was on a interstate, the cops found him, corralled the car and forced it off the road into a field where it eventually stopped. It would of been so easy for the dispatcher to tell him to press the Start/Stop twice and pull onto the shoulder.

Or put it in neutral and coast to a stop while the engine blows up.

 

[Sig cx-5]

Or put it in neutral and coast to a stop while the engine blows up.

The rev limiter eliminates this concern.

As for "unintended acceleration", it should not be an issue on any modern vehicle. Mazda started implementing a fix in 2011.

"When Mazda launched the 2011 Mazda2 subcompact car in the U.S., its press material indicated that this was the first Mazda in the U.S. market to have brake-throttle override technology. All 2012 Mazda vehicles now have brake-throttle override as standard equipment. Mazda doesn’t have any different name for it.

Mazda’s brake-throttle override system works based on a signal from the brake pedal switch. If it detects a conflict where the car’s computer is receiving signals from both the accelerator and the brakes, the brakes take precedence. Brake-throttle override works on all vehicles, regardless of transmission or starting systems."

LINK

 

[ch3no2]

Reminds me of pullng the key out of the ignition on a freeway 2 get the Escort Radar Dectector out of the locked gove box. Yeah, I get it, but I was young.

 

[Conrad 16.5]

Reminds me of pullng the key out of the ignition on a freeway 2 get the Escort Radar Dectector out of the locked gove box. Yeah, I get it, but I was young.

That's hilarious! I still have that very same Escort on a shelf in my workshop. Why? Dunno. lol