NefMoto

Hi, there is a couple threads about dq250 paired with 1.8t 20v but no one mention about revmatching while downshifting. In my case it doesn't work at all in D, S nor tiptronic mode. The effect is terribly slow downsifting. As it won't throttle blip- it downshifts "semiclutched" to match engine speed so it takes about 2-3 seconds. Is it normal behaviour in 1.8t 20v with dsg? Is there a way to fix it?

BTW. Does anyone know if there are switches/maps in dsg software to control revmatching? I'm asking because in some cars throttle blip exist in S and tiptronic mode while in others only in tiptronic. I'm curious isfthere is possibility to modify it, but have no clue how it's called in german language.

Regards

Search for Zwischengas or ZG Schaltung, there are some conditions for it, and of course the ECU should react to the request.

B_zges : CAN BUS table for ME7 shows it as 'Planned for future' and not used yet, but I haven't confirm in disassembly. Have you confirmed it's use in ME7?
Same for nsyw.

edit: The ME7 FR doc I have is missing details about MISGSL_W / MIGSL_W but does seem to use it in MDKOL. MED9 FR has more details. I hope I can fire up IDA again. It's been years since I've done anything.

@elRey there is me7 which does throttle blip. It is me7.1.1 from 3.2 vr6

I can confirm that 3.2 vr6 022906032CB (c167 procesor) does it and it is possible enable/disable throttle blip by: "Freigabe der ZG-Schaltung" in dsg software (thanks PRJ for hint). Same switch set in gearbox of 1.8t and no blip at all.

If you will manage to do something in 1.8t me7 ecu- I'll be grateful for information.

So, it sounds like a code patch is necessary for 1.8t

Either that or he didn't flip enough bits in the DSG software. It is not only one parameter to enable it.

Logging the variables will show if the gearbox is requesting it or not.

nsyw

CAN ID 540 bit 4

If that shows a desired RPM, but ECU doesn't respond, then patch is needed?
How can you tell if ECU is or is not responding to desired engine speed request above?

Ecu pn?

It seems that there is no me7 4cyl with SY_ASG
032HF tip ecu has empty byte ID540.4 ( 0xF855)
518AM stores data in external memory and thats all :)

Im only able to find it in 022906032DR ecu (0xF83F) which has a2l available
There is also tsyn nsywin etc
Function available but its pretty complex idk about porting  ::)

its a 032hj but it might help

https://easyupload.io/ogq235

Thanks Marty
Ive got those VAG18TONLYsomething pack
But none of them match

And CWMDKOG?

Not enough for a EPU request by DQ250..

0x540 byte3 needs to be requested RPM
0x540 byte4 needs to be invers requested RPM
0x540 byte5 needs to send synchronisation time

0x540 byte 0, bit3 needs to be 1, when Zwischengas-request is active

Can we discuss about enabling zg-schalting in s/tt at dq250 Exx Fxx ?

Presume you guys already have this - but if not hope this can be useful.

So far im come to this


KrsZG_DNZielMaxNRegEin_ko
Maximalwert fuer Zieldrehzahldifferenz, ab dem der Wunschdrehzahlregler aktiviert wird
Maximum value for target speed difference from which the desired speed controller is activated
val 0
?

KrsZG_GangMax_ko[Tip]
Zielgang unterhalb dem, keine ZG-Schaltungen mehr im Tiptronic-Betrieb mцglich sind
Target gear below which ZG shifts are no longer possible in Tiptronic mode
val 1
*seems ok if translated properly


KrsZG_FpMax_kf
max. Fahrpedalwinkel i.A. Letztgang und Synchrondrehzahl fьr Freigabe einer ZG-Schaltung
Max. accelerator pedal angle i.A. last gear and synchronous speed for release of a ZG circuit
val 40
*seems ok for me

KrsZG_MMotMax_kf
max. Motormomet i.A. Letztgang und Synchrondrehzahl fьr Freigabe einer ZG-Schaltung
Max. engine torque i.A. last gear and synchronous speed for enabling a ZG circuit
val ~170
*also seems ok

KrsZG_MAbbruchZuschiessen_ko
max. Moment auf Gehender beim Abbruch des Zuschiessens bei einer ZG-Schaltung
Max. moment of walking when aborting closing with a ZG circuit
val -100
*idk what is it

hello, I also have a mk4 1.8t dq250, without revmatching.
Has anyone managed to make it work?
I'm looking for the way but without success.

Bringing this tread back. I have a 022906032KR that I am trying to control rev-matching on.  I am sending messages over 0X540 per below.

540[0] = activate Zwischengas
540[3] = Define sync RPM
540[4] = Define inverse sync RPM
540[5] = Define sync time in ms

I haven't been able to control RPM using these controls and am sure I'm missing something.  The documents I have don't really go into all of the qualifiers for enabling this. Does anyone have any additional info they could share. Thanks in advance.

Did anyone ever get anywhere with this?
Obviously the ECU is the issue here, since the TCU sends out the correct data on the bus.
And since the ME7.1.1 VR6 DSG does throttle blip but ME7.5 1.8T does not, the questions is if there is an compile difference or an map difference.