My Car will not go into launch mode

[Janticoli]

2018 S6/ 29k miles

This is my second one in the past year as my first 2018 was hit and totaled. Only prefacing that because i followed the steps accordingly on my last one and was able to launch it no problem... this one i can't get it to work! ESC off, dynamic mode on... left foot smashed on the pedal and then push down on the accelerator..... the rpm's never rev up and it just feels like i am power braking..


any help? am i missing something?

[brad281]

Check your launch counter. Factory limit is 200. If the prior owner launched 200 times, you'll have to get a tcu tune to remove the limit.

Sent from my SM-A716V using Tapatalk

[widebodyfx]

Checking the launch count is a good idea. ESC needs to be held down until it says braking guard off (not just tapping it to turn off traction control), car needs to be up to temp and steering wheel should be straight.

[brad281]

Checking the launch count is a good idea. ESC needs to be held down until it says braking guard off (not just tapping it to turn off traction control), car needs to be up to temp and steering wheel should be straight.

Is the C7.5 different from the C7? My C7's ESC only has one setting.

Sent from my SM-A716V using Tapatalk

[Faceman76]

Was the oil up to temp?

Sent from my SM-G975U using Tapatalk

[hozda]

On my 18 S6 I had to blip the throttle a few times before it would rev up to 5k


Sent from my iPhone using Audizine Forum

[Nosferatu]

Checking the launch count is a good idea. ESC needs to be held down until it says braking guard off (not just tapping it to turn off traction control), car needs to be up to temp and steering wheel should be straight.

That part of ESC is not necessary.

<<-- 2018 RS7 Performance. ESC Sport (1 single click), hold brake down hard, floor it, release brake. Brake has to be FIRMLY pressed down and like others said make sure the car is warmed up. It'll do the aggressive AMAX shifting then until the 200th time like others stated.

[widebodyfx]

Is the C7.5 different from the C7? My C7's ESC only has one setting.

Sent from my SM-A716V using Tapatalk

I don’t know if there’s a difference, have always done or read of holding down the traction control until the DIS says braking guard off. If it works for you without the long hold that is enough for me.

Steps I recall as to how to use LC.
Car up to temps
Steering wheel straight
Drive select in dynamic ?
Trans in Sport
ESC off (item I guess in question is long hold or quick tap)
Brake pedal all the way down
Mash the accelerator pedal

[brad281]

I don’t know if there’s a difference, have always done or read of holding down the traction control until the DIS says braking guard off. If it works for you without the long hold that is enough for me.

Steps I recall as to how to use LC.
Car up to temps
Steering wheel straight
Drive select in dynamic ?
Trans in Sport
ESC off (item I guess in question is long hold or quick tap)
Brake pedal all the way down
Mash the accelerator pedal

Drive select can be in whatever as long as the Trans is in Dynamic. For the B8 and other platforms with DSG you have to do the long press of the ESC, but not on the C7 dsg cars. Just push it once and release. Not sure about the C7.5.

Sent from my SM-A716V using Tapatalk

[widebodyfx]

Got it, I did LC only a handful of times in my 2016 S6. At the track, upsweep launch worked out better at least on stage 3.

[brad281]

Got it, I did LC only a handful of times in my 2016 S6. At the track, upsweep launch worked out better at least on stage 3.

I agree on the upswing. I lowered my launch rpm to 3k to avoid wheel hop

Sent from my SM-A716V using Tapatalk

[Janticoli]

Thanks for all the replies... I will get to a scanner to check my launch counter.

Just to clarify though... does it matter if i move the gear selector over to manual?

[brad281]

Thanks for all the replies... I will get to a scanner to check my launch counter.

Just to clarify though... does it matter if i move the gear selector over to manual?

As long as the transmission is in Dynamic when you move the shifter to manual it will still go into launch control.

Sent from my SM-A716V using Tapatalk

[Audisthesia]

NO AMAX on an S6.

[Janticoli]

NO AMAX on an S6.

whats AMAX ?

[sepheroth86]

Got it, I did LC only a handful of times in my 2016 S6. At the track, upsweep launch worked out better at least on stage 3.

What is this upsweep launch you speak of?

[Alabama]

whats AMAX ?

From another AZ thread:

Amax uses both clutches simultaneously and slips between the gears.

A normal shift de-rates the engine by telling the ECU to pull timing. It does this to prevent free-revving and to lower the torque at the clutch to make shifting easier. It has the engine de-rate while it's opening the first clutch. The engine free-wheels for 50ms or so while the second one is being closed and then the TCU tells the engine to bring back the power. That de-rate timing retard is what causes the DSG "farts" you can hear on videos.

Amax doesn't work like that. When in this mode, the TCU keeps the beans on the entire time. There is no de-rate at all. It controls the engine RPM by having both clutches engaged in the linear (slip) region together while it transitions between the two. The upshot of this is that there is no de-rate, the engine is making full power the entire time and is transmitting it to the ground even during the shift. The downside is that it's extremely delicate. If the transition time is too fast, the clutches won't slip enough, will be working against each other and will rip themselves out of the transmission. On the other side, if the transition time is too slow, the engine will free rev, hit the limiter and de-rate via the rev limiter. It comes back as soon as the clutch closes a bit more and pulls it off the redline, but it still spent some time in de-rate.

[gk1]

That is an interesting note I thought AMAX was only a ZF thing. At least I notice no difference on my S6 pre and post TCU tune. (Even though AMAX is listed in APR's marketing materials.)

AMAX as I understand it is a stock built in ZF thing and it essentially does what is described, but perhaps put more simply it does not drop the power in-between shifts so it is like powershifting each gear and you can feel the car lurch forward when it happens.
I've done it in the SQ5 and it is definitely different than just flooring it.

[Audisthesia]

That is an interesting note I thought AMAX was only a ZF thing. At least I notice no difference on my S6 pre and post TCU tune. (Even though AMAX is listed in APR's marketing materials.)

AMAX as I understand it is a stock built in ZF thing and it essentially does what is described, but perhaps put more simply it does not drop the power in-between shifts so it is like powershifting each gear and you can feel the car lurch forward when it happens.
I've done it in the SQ5 and it is definitely different than just flooring it.

Everything I've ever read says launch mode for DSG, AMAX for ZF.

[Alabama]

That is an interesting note I thought AMAX was only a ZF thing. At least I notice no difference on my S6 pre and post TCU tune. (Even though AMAX is listed in APR's marketing materials.)

AMAX as I understand it is a stock built in ZF thing and it essentially does what is described, but perhaps put more simply it does not drop the power in-between shifts so it is like powershifting each gear and you can feel the car lurch forward when it happens.
I've done it in the SQ5 and it is definitely different than just flooring it.

The quote is from the 2017 AZ thread titled "What is AMAX?" and attributed to "Sean@APR". In the last post of the thread Chris Morales wrote "Whatever the details, the gist I think is that normally the TCU tells the ECU to pull timing and power between shifts in order to preserve the transmission, but AMAX mode turns that protection off. You power straight through the gears."

[mrkubanftw]

As long as the transmission is in Dynamic when you move the shifter to manual it will still go into launch control.

Sent from my SM-A716V using Tapatalk

You need 3 things for launch control to work.

Up to temps.
Basic traction control-off. Single press of ESC.
Transmission in Dynamic
Drive select in S-mode. I've had it work far more consistently in S-mode. I have had it NOT work in manual mode. I THINK it uses the drive select mode you were IN and carries it to manual. So being in S mode and going to manual perhaps work fine too?

[brad281]

You need 3 things for launch control to work.

Up to temps.
Basic traction control-off. Single press of ESC.
Transmission in Dynamic
Drive select in S-mode. I've had it work far more consistently in S-mode.

I was answering a specific question. The other 2 were already covered in this thread.

Sent from my SM-A716V using Tapatalk

[mrkubanftw]

I don't see anyone mentioning S-mode for drive select. Sorry if I missed it. Pretty positive that's this users issue.

[brad281]

I don't see anyone mentioning S-mode for drive select. Sorry if I missed it. Pretty positive that's this users issue.

Drive select doesn't have to be in Dynamic. Just the transmission.

Sent from my SM-A716V using Tapatalk

[mmurphys7]

What has anyone used to flash the ECU to reset Luanch mode count from the 200 max?

Sent from my SM-G998U using Audizine Forum mobile app

[mrkubanftw]

Drive select doesn't have to be in Dynamic. Just the transmission.

Sent from my SM-A716V using Tapatalk

For my 7.5 it NEEDS to be in S mode. It WILL NOT launch control out of S mode. Dash needs to show an S.


I see what you are saying, people are calling that dynamic. Seems to be confused with the driving mode.

[brad281]

For my 7.5 it NEEDS to be in S mode. It WILL NOT launch control out of S mode. Dash needs to show an S.

The dash shows an S if the transmission is in Dynamic.

Sent from my SM-A716V using Tapatalk

[mrkubanftw]

The dash shows an S if the transmission is in Dynamic.

Sent from my SM-A716V using Tapatalk

I think A LOT of people confuse dynamic drive select modes and S-mode on their transmission. Dynamic is a drive select mode that affects steering, suspension, etc. It does not put the transmission into S-Mode. S-Mode is not the same as "dynamic" in this case. I have never heard S-mode referred to as dynamic... I have only seen people confuse the two.


https://www.youtube.com/watch?v=AFDkO38Znu0

[Alabama]

I think A LOT of people confuse dynamic drive select modes and S-mode on their transmission. Dynamic is a drive select mode that affects steering, suspension, etc. It does not put the transmission into S-Mode. S-Mode is not the same as "dynamic" in this case. I have never heard S-mode referred to as dynamic... I have only seen people confuse the two.

Agree. When I use MMI "Car" screen and select "Dynamic" mode, the dash shows a "D". Then when I pull the shifter to the rear, the car goes into "Sport" mode and an "S" shows on the dash. Another pull on the shifter and the car returns to Dynamic.

[gk1]

I think A LOT of people confuse dynamic drive select modes and S-mode on their transmission. Dynamic is a drive select mode that affects steering, suspension, etc. It does not put the transmission into S-Mode. S-Mode is not the same as "dynamic" in this case. I have never heard S-mode referred to as dynamic... I have only seen people confuse the two.


https://www.youtube.com/watch?v=AFDkO38Znu0

Really?
That is 100% bizarre.
I have had an Audi since Drive Select was first introduced and it always puts the transmission/throttle response to "S" when I select Dynamic mode.
That is quite strange that you guys are saying your cars behave otherwise.
I understand when you stay in Dynamic mode and shut the car off and back on again it is in "D" that is by design, but you if you are driving in say "Auto" mode and switch to Dynamic it always puts my car into "S". It basically puts everything that can be adjusted to its most sporty setting... makes German sense.

[mrkubanftw]

Really?
That is 100% bizarre.
I have had an Audi since Drive Select was first introduced and it always puts the transmission/throttle response to "S" when I select Dynamic mode.
That is quite strange that you guys are saying your cars behave otherwise.
I understand when you stay in Dynamic mode and shut the car off and back on again it is in "D" that is by design, but you if you are driving in say "Auto" mode and switch to Dynamic it always puts my car into "S". It basically puts everything that can be adjusted to its most sporty setting... makes German sense.

It has unfortunately been my experience. I'm tending to think perhaps dynamic maintains the last transmission mode it was in. If you were in sport-mode and switched to comfort it will automatically pull the car back into standard D, and i'm thinking when you go back to dynamic it automatically jumps back to S-mode. I don't know. Some testing could figure it out. I'd help but my car is on blocks right now :P

[gk1]

It has unfortunately been my experience. I'm tending to think perhaps dynamic maintains the last transmission mode it was in. If you were in sport-mode and switched to comfort it will automatically pull the car back into standard D, and i'm thinking when you go back to dynamic it automatically jumps back to S-mode. I don't know. Some testing could figure it out. I'd help but my car is on blocks right now :P

Sorry about being up on blocks.

If I select Dynamic which automatically selects "S" for me then pull back to select "D" if I then select Dynamic again it changes it back to "S" for me as I would expect.
Also if I go to "Auto or Comfort" and pull back to select "S" if I then go to any other mode other than Dynamic it switches back to "D". It doesn't maintain the "D/S" drive mode it was in when I was last in that Drive Select setting.
This is all how I would expect it to work too.
I do not believe that has changed on your C7.5 (I could be wrong), but Alabama has a C7 like me and it should for sure behave the same as mine.
Unless there is just some confusion on what is displayed on the dash?
When I switch to dynamic the dash show the "S" with an arrow down then the "D" indicating you are in "S" Sport and you can pull back to engage "D" Drive if you want.
Like this (ascii)
S
V
D

[Janticoli]

ANother question to add to this ... does the brake pedal have to be smashed to the floor? What is the sequence of events to engage... brake pedal smash...then press down gradually on gas to make sure clutch is engaged for launch? OR brake pedal smashed and then smash gas pedal in the assumption that it will engage launch control and only rev to 5k ...

[gk1]

ANother question to add to this ... does the brake pedal have to be smashed to the floor? What is the sequence of events to engage... brake pedal smash...then press down gradually on gas to make sure clutch is engaged for launch? OR brake pedal smashed and then smash gas pedal in the assumption that it will engage launch control and only rev to 5k ...

...the brake pedal has to be pushed really hard to the floor might feel unnatural, but if it isn't pressed hard enough launch won't work.

[mrkubanftw]

Sorry about being up on blocks.

If I select Dynamic which automatically selects "S" for me then pull back to select "D" if I then select Dynamic again it changes it back to "S" for me as I would expect.
Also if I go to "Auto or Comfort" and pull back to select "S" if I then go to any other mode other than Dynamic it switches back to "D". It doesn't maintain the "D/S" drive mode it was in when I was last in that Drive Select setting.
This is all how I would expect it to work too.
I do not believe that has changed on your C7.5 (I could be wrong), but Alabama has a C7 like me and it should for sure behave the same as mine.
Unless there is just some confusion on what is displayed on the dash?
When I switch to dynamic the dash show the "S" with an arrow down then the "D" indicating you are in "S" Sport and you can pull back to engage "D" Drive if you want.
Like this (ascii)
S
V
D

Do you have the sport diff? I wonder if that makes a default difference for Dynamic drive select. I do NOT have a sport diff. I should have it back on the ground by Sunday or so, and ill be sure to give it a try to confirm. I had a time getting launch control to work when I first got the car about 4 months back. Launch control wasn't even working in M mode unless I first went to S and then switched to M.

[gk1]

Do you have the sport diff? I wonder if that makes a default difference for Dynamic drive select. I do NOT have a sport diff. I should have it back on the ground by Sunday or so, and ill be sure to give it a try to confirm. I had a time getting launch control to work when I first got the car about 4 months back. Launch control wasn't even working in M mode unless I first went to S and then switched to M.

I don't think sport diff should make a difference. When you select Dynamic all systems that can change should go to 11.
Something definitely sounds strange with yours if you stay in "D" when selecting Dynamic and might also explain your initial launch issues as "S" is implied when you switch to Dynamic but in your case it sounds like you had to explicitly make sure it was in "S" first???

[Cris_OO7]

Really?
That is 100% bizarre.
I have had an Audi since Drive Select was first introduced and it always puts the transmission/throttle response to "S" when I select Dynamic mode.
That is quite strange that you guys are saying your cars behave otherwise.
I understand when you stay in Dynamic mode and shut the car off and back on again it is in "D" that is by design, but you if you are driving in say "Auto" mode and switch to Dynamic it always puts my car into "S". It basically puts everything that can be adjusted to its most sporty setting... makes German sense.

This is also how my S6 behaves when selecting dynamic and shutting it off it goes to D.


Sent from my iPhone using Audizine Forum

[mrkubanftw]

I don't think sport diff should make a difference. When you select Dynamic all systems that can change should go to 11.
Something definitely sounds strange with yours if you stay in "D" when selecting Dynamic and might also explain your initial launch issues as "S" is implied when you switch to Dynamic but in your case it sounds like you had to explicitly make sure it was in "S" first???

From what I am reading... if you were in dynamic and restarted the car, the transmission will default to D mode. Could you confirm if this happens or not?

ref.

"Dynamic puts it in Sport mode and you'll see the S, but remember, with a restart of the car, it will start in D for regulatory reasons even though you left it in Dynamic. You have to use the shifter to get it back to S."

https://www.audizine.com/forum/showt...namic-vs-sport

[gk1]

From what I am reading... if you were in dynamic and restarted the car, the transmission will default to D mode. Could you confirm if this happens or not?

ref.

"Dynamic puts it in Sport mode and you'll see the S, but remember, with a restart of the car, it will start in D for regulatory reasons even though you left it in Dynamic. You have to use the shifter to get it back to S."

https://www.audizine.com/forum/showt...namic-vs-sport

Yes, that is 100% by design.
To perform with best results on the EPA tests they decided to have it this way so it starts in most efficient throttle/trans mode available.
Otherwise EPA could lower their rated mileage and that would not be good.

[mrkubanftw]

So then you can be in Dynamic, and not have the transmission in sport mode. When I read about people "being in dynamic" and not able to use launch control, this is the scenario I consider. Selecting dynamic does nothing in this case, it needs the shifter bump.