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BMW 3-Series (E90 E92) Forum
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DTC, Traction Control
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12-17-2008, 01:22 PM | #1 |
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DTC, Traction Control
Hey Guys....First time driving Manual, rear wheel drive in snow....and let me tell ya...I can feel slippage...from a stop and turning...I am thinking about putting something heavy in the trunk to see if it helps...I have snow tires....
So my question is, should I turn off Traction control? What are the 2 settings and what do they do? Press DTC once = ? Press and Hold DTC = ? Thanks... |
12-17-2008, 02:07 PM | #3 | |
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Given I've only owned my 3 series for less than a week, someone correct me if I'm wrong.
From BMW: Quote:
DSC = dynamic stability control: this will correct your under/oversteers - good for driving in the winter or wet conditions at higher speeds since it'll limit fishtailing. DTC = dynamic traction control: this turns off correction for under/oversteers - good if you're stuck in deep snow going slowly (like a residential road - sort of like your 4x4). Correcting for steer is up to the driver. So if you're driving around town, I would assume that the default setting (DSC) would be sufficient. If you're going out of the driveway and there's a lot of snow that's not shovelled, you'd use DTC. Turning DTC off would only be if you want to drift through a turn or something. |
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12-17-2008, 02:26 PM | #4 |
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I am still lost...sorry if I sound stupid...I did read the manual and did not understand...
When I turn on my car...Everything is turned on (DSC and DTC) correct? When I press DTC, I turn in off? When I hold DTC, Turns both DSC and DTC off? or When I turn on the car DSC is on on and DTC is off... So, when I press DTC, it turns on.... Hold DTC, and everything is off? |
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12-17-2008, 02:36 PM | #5 |
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yeah, I am confuse too, I have auto tranny
I tried driving today in snow by pressing DTC once and it feels better in snow. does it mean I am driving without DTC? make any sense? I want to have better control in snow, do I turn on DTC (default) or off (press it once)? help us please ...
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12-17-2008, 03:07 PM | #7 |
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countersteer your way out!
Play Initial D all night and you will be okay!
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12-17-2008, 03:15 PM | #8 | |
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Press DTC button once to deactivate (Off) DTC. At this moment, DSC is still on. Press and Hold DTC button for 3 second, both DTC and DSC will be deactivate (Off). You can not have DTC activate and DSC deactivate (Off). Either DTC off or DTC and DSC off. |
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12-17-2008, 03:24 PM | #10 | |
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12-17-2008, 03:33 PM | #11 |
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Because when you’re going uphill in snowy/icy conditions and the DTC kicks in it applies the brakes and you loose momentum. Some wheel spin is acceptable as long as you move forward. Ultimately DTC will apply the brakes until all wheel spin has stopped which could leave you standing still. Once moving at an acceptable speed I agree that DTC on is a good thing and it will definitely save your ass that one time your not paying attention.
Last edited by Lazzer; 12-17-2008 at 08:25 PM.. |
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12-17-2008, 06:23 PM | #12 |
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DTC works great when you want to do controlled power drifts in the snow
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12-18-2008, 02:22 PM | #13 |
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Personal preference I guess.
I always hit the DTC button which turns off some of the 'nannies' but leaves enough so you don't overcook it in the snow (always tempting). |
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12-19-2008, 05:36 PM | #14 |
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Given where I live, I use DTC extensively during winter *now* as well as occasionally in the summer. As others have mentioned, according to BMW the DTC program is a subset (option) of the overall DSC
There are 3 modes, controlled by small DTC button on dash 1 >> DSC enabled *this is the default (startup) mode, and it means full dynamic stability control* 2 >> DTC *enabled by briefly pushing / releasing dash button* ... meant to be used when you want over-steer (summer) or in winter snow/ice conditions. It allows back end to slide without power being cut, and is most useful for better starts from a stop light or stop sign when there's limited traction. I recommend this setting for awful driving conditions 3 >> DSC/DTC totally disengaged. Enabled by pushing/holding dash button for 5 seconds. Only recommended for dyno testing, not street driving Cruise control does NOT work when DSC is disabled (ie in either mode #2 or #3 above).
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12-19-2008, 06:07 PM | #15 |
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So Calgary_Agent, right now (as in today) what setting are you using? Say on Macleod Tr and also on Deerfoot? Edmonton's roads are horrible and from what I heard, Calgary's pretty much the same.
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12-19-2008, 06:13 PM | #16 | |
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With the Xi and DTC the car is great, but the laws of physics still apply.
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12-20-2008, 07:34 AM | #17 | |
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Yes this is right. |
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12-20-2008, 07:44 AM | #18 | ||
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Huh? Then what's the point of pushing the DTC button if it's already on?
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So BMW should call the default mode: DSC and when you push the DTC button it should be called: DSC-DTC. that would make more sense. |
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12-20-2008, 11:37 AM | #19 |
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I almost always press DTC once .. whether it's dry, rainy, or snowing. I can't deal with the nannies kicking in every second and cutting power. DSC on the other hand has saved my ass a couple times.
Based on this comment, and your comment about "no need for sandbags" , you evidently don't know anything about driving a rwd car in winter conditions. |
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12-20-2008, 11:51 AM | #20 | ||
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PS. DTC off doesn't mean traction is turn off all the way, it will just cut your power later let you spin a bit more. For example, if you have your DTC on, the traction control will cut in immediately whenever it feel the tire has no traction. When the DTC is off, it will let thre tires spin a bit before it cut in. |
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12-20-2008, 12:20 PM | #21 | |
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http://www.e90post.com/forums/showpo...0&postcount=28 I actually learned to drive in the winter on my first car, which was a z28 in high school. There was no traction control and all season tires. So I think sandbags are a little overkill, just my opinion. I did find out that pressing the traction control button does help when you are trying to get out of deep snow, which helped this morning. Don't get your panties all knotted up now.. you can keep your sandbags in the car |
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12-20-2008, 12:58 PM | #22 | |
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Would you like a cookie for the picture of you driving in the snow? Congrats. It's really simple physics. Weight over the rear axle will help put the power to the rear wheels and gain traction. People have been doing it for decades with RWD. Apparently your 3 series is different from everyone's. It is beneficial to active DTC when you are experiencing wheel slippage in adverse conditions to gain traction. Read the brief explanation of DTC/DSC on page 90 of your manual. You might learn something. |
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