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  #1  
Old 12-05-2004, 06:35 AM
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Mein Auto:
Electronic gas pedal "clicks" before bottoming out

Why does the gas pedal (electronic?) "click" when I floor it at the moment just before bottoming out. It happened on all newer 3, 5, 7 series cars. My '01 330i doesn't do that, and it has electronic gas pedal.
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  #2  
Old 12-05-2004, 07:19 AM
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Quote:
Originally Posted by Dave 330i
Why does the gas pedal (electronic?) "click" when I floor it at the moment just before bottoming out. It happened on all newer 3, 5, 7 series cars. My '01 330i doesn't do that, and it has electronic gas pedal.

Probably has something to do with living in Houston
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  #3  
Old 12-05-2004, 07:28 AM
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Mein Auto: 1991 318i (E30, M42)
It should be in the owner's manual, but I believe that hitting that click forces the automatic transmission to immediately downshift.

That's just from memory though, since I've never owned an automatic BMW.
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  #4  
Old 12-05-2004, 10:21 AM
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BMW calls it "kick down" and it is only on automatic equipped cars. It works just like kioneo described. It will immediately downshift the car and hold shifts until redline. All BMW's with automatics as far as I can remember have had it. I remember my '88 535i with an automatic had it.
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  #5  
Old 12-05-2004, 12:03 PM
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I was surprised by how obvious that kickdown switch is. Most cars have this feature (even old domestic cars with non-electronic transmissions) but AT BMWs are the only ones I've ever driven that have that very obvious click.
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  #6  
Old 12-05-2004, 12:30 PM
shortyb shortyb is offline
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I have a manual tranny and my pedal does the same thing. Might have something to do with signaling the ECU that its at WOT
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  #7  
Old 12-05-2004, 02:29 PM
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Quote:
Originally Posted by shortyb
I have a manual tranny and my pedal does the same thing. Might have something to do with signaling the ECU that its at WOT
Same here (manual, too)! I am just used to it by now.
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  #8  
Old 12-05-2004, 02:36 PM
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I thought autos only had this
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  #9  
Old 12-05-2004, 02:47 PM
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Quote:
Originally Posted by KP
I thought autos only had this
Come to think of it, mine only does that when I let go the gas pedal...
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  #10  
Old 12-05-2004, 03:01 PM
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Quote:
Originally Posted by shortyb
I have a manual tranny and my pedal does the same thing. Might have something to do with signaling the ECU that its at WOT
Ahhh...must give this a try!
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  #11  
Old 12-05-2004, 03:05 PM
allaboutme allaboutme is offline
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Quote:
Originally Posted by BlackChrome
Come to think of it, mine only does that when I let go the gas pedal...
Isn't the kickdown switch for autos only? There would be little purpose having one in a manual car. Maybe you have the "sticky pedal".
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  #12  
Old 12-05-2004, 03:21 PM
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Quote:
Originally Posted by allaboutme
Isn't the kickdown switch for autos only? There would be little purpose having one in a manual car. Maybe you have the "sticky pedal".
It's not a switch, I know that for sure. It's just this sound the pedal makes when you push it hard and let it go quick (like when you shift)
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  #13  
Old 12-06-2004, 03:22 AM
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The pedals are basically interchangeable, so either BMW put hte AT one in due to supply, or just switched to it for all cars.

The sticky pedal issue just felt notchy.
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  #14  
Old 12-06-2004, 04:18 AM
andy_thomas andy_thomas is offline
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Quote:
Originally Posted by shortyb
I have a manual tranny and my pedal does the same thing. Might have something to do with signaling the ECU that its at WOT
The accelerator pedal module in BMW's drive-by-wire cars use a Hall-effect sensor to detect pedal position. No longer is the kickdown switch an "active" switch - it is there only for driver feedback. When the pedal is depressed beyond the normal full-throttle position, the sensor basically detects more than 100% throttle opening, and a command is sent to the gearbox to downshift to the lowest possible gear. The accelerator module is the same for auto and SMG cars. Manual cars have the same module, but without the kickdown detent (and a recalibrated sensor).
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  #15  
Old 12-06-2004, 06:03 AM
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The pedal in my car makes a loud click when I first start to step on it, regardless of how fast or far I push it down. I think something minor is broken, I'm going to bring it up at the 15K service.
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