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Acura TSX

5068 messages,  Last post on Nov 17, 2008 at 10:59 AM

You are in the Acura TSX Forum. Your Hosts are pat & karens

What is this discussion about? Acura TSX, Sedan


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#4101 of 5068
Re: New to the boards [xplorx4] by flicmod
Jun 01, 2005 (5:32 am)
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Replying to: xplorx4 (May 31, 2005 1:06 pm)

Does the VSA and TCS function the same? I was under the impression that they were two separate systems. I know where the /!\ button is and I have turned it off occassionally too. The TCS prevents wheel spin when there's too much power going to the wheels and not enough traction to pick that power up. The VSA does kind of the same thing I guess, but it transfers power from side to side instead of lowering the RPMs. Correct me if I'm wrong. I'll take your word on it being the same though.
I might have to try disabling it to see how fun it is. I was always a little hesitant to do it before because I didn't know how it would exactly change the handling. I'll test it out though.
Well, at least other owners have found the A pillar blind spot to be troublesome. Glad to hear you didn't drive over the guy though!
#4102 of 5068
Re: New to the boards [flicmod] by flicmod
Jun 01, 2005 (5:34 am)
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Replying to: flicmod (Jun 01, 2005 5:32 am)

Let me correct something I said above. I turned off the VSA button by accident before. My knee hit it when I was getting in the car while it was running. I haven't tried to turn it off intentionally to see how the car handles. Thought my last post sounded kind of contradictory!
#4103 of 5068
flicmod- VSA by xplorx4
Jun 01, 2005 (7:47 am)
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On the TSX, the traction-control system is called "Vehicle Stability Assist" (VSA). So, TCS and VSA are just two different acronyms for the same thing. VSA employs both braking and throttle control to maintain traction and stability.
 
If the system is on, you cannot spin the tires. VSA will reduce throttle and apply brakes as necessary. Of course, in hard cornering, it will also brake the appropriate wheels to prevent oversteer.
#4104 of 5068
Re: flicmod- VSA [xplorx4] by flicmod
Jun 01, 2005 (8:18 am)
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Replying to: xplorx4 (Jun 01, 2005 7:47 am)

I got ya now. I assumed they were separate, not one system under two separate names. Thanks for the info. I appreciate it.
#4105 of 5068
Re: flicmod- VSA [xplorx4] by lmacmil
Jun 01, 2005 (6:23 pm)
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Replying to: xplorx4 (Jun 01, 2005 7:47 am)

"So, TCS and VSA are just two different acronyms for the same thing."
 
Well, not exactly. Stability control adds inputs from the yaw and steering angle sensors to selectively brake one wheel to correct an oversteer or understeer condition. TCS just looks at wheel slip and brakes the slipping wheel or reduces throttle input until traction is regained. The reason one switch disables them both is that they share solenoids in the ABS modulator.
#4106 of 5068
Re: flicmod- VSA [lmacmil] by flicmod
Jun 02, 2005 (5:44 am)
Reply

Replying to: lmacmil (Jun 01, 2005 6:23 pm)

See, that's what I thought they did. I was confused at what xplorx4 was saying because the names "traction control system" and "vehicle stability assist" have no relation to one another. One is supposed to control traction, while the other is supposed to control handling. I can see your point about why they are both disabled when you push the VSA button on the dash.
 
Here's another thing, but correct me if I'm wrong... the VSA on the TSX is the same setup as on the RL and I would assume the TL has the same also. The VSA on the RL allots 60% of power to the front wheels and 40% to the back, but when cornering, the VSA can transfer up to 100% of power to the outside wheels. I was always under the impression that since its the same system on all the cars, that this is what it did. Similar to a limited-slip diff.
#4107 of 5068
Re: flicmod- VSA [flicmod] by flicmod
Jun 02, 2005 (5:46 am)
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Replying to: flicmod (Jun 02, 2005 5:44 am)

Sorry, this last parts kind of misleading. Minus the AWD from the TSX and TL. I meant to say that the VSA on both of these cars just transfers power left to right, whereas the setup on the RL transfers power to all four corners.
#4108 of 5068
Reply about TCS/VSA by xplorx4
Jun 02, 2005 (8:37 am)
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Thanks for clarifying the differences between the features. I was aware that technically there is a difference between TCS and VSA, I just didn't provide the details. Though the two systems do different things (as you mentioned above) I believe flicmod was under the impression (previously) that TCS cannot be disabled, but VSA can. I guess my main point was that on the TSX, both VSA and TCS are disabled/enabled when you press the "VSA OFF" button. So that's why I called them "the same thing."
#4109 of 5068
Re: Reply about TCS/VSA [xplorx4] by flicmod
Jun 02, 2005 (10:29 am)
Reply

Replying to: xplorx4 (Jun 02, 2005 8:37 am)

Yeah, you're right xplorx4. The whole thing with the button just saying "VSA Off" is pretty misleading. It should say "TCS VSA Off" to be politically correct. Glad we solved the issue though! Good work guys.
#4110 of 5068
Re: flicmod- VSA [flicmod] by lmacmil
Jun 02, 2005 (2:35 pm)
Reply

Replying to: flicmod (Jun 02, 2005 5:44 am)

Stability control operates the same basic way on all cars but the software is tuned for each specific vehilcle depending on their handling characteristics.

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