FAQ - VCDS Module 09-Central Electronics & Long Code Helper

SwissJetPilot · Jun 16, 2018

Posted from a German Spec 2007 3.2 Quattro Roadster -

I think it's safe to assume not all TT's have the exact same options in coding, so yours may be different. This is just to give you an idea of what may be available under the Centeral Electronics module and where to find it if you want to change anything.

My personal settings -

Byte 0 - Daytime Running Lights (Scandinavia) active. Like the North America option, it turns on the front DLRs. In addition, the tail lights and license plate lights also come on when the DRL switch is turned on at the master light-switch.

Byte 21 - Drop-down selection for 06 Bi-Xenon Front Light with LED Daytime Running Lights (DRL). This will allow you to replace the OEM DRL bulbs for LED bulbs without CANBUS error or the need to modify the wiring harness (in-line resistor).

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SwissJetPilot · Jun 19, 2018

09-Cent. Elect. Measuring Block Groups 1-25 and Adaptation drop downs (2007 - German Spec).

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ReTTro fit · Jun 20, 2018

Just so people know, this is a prefacelift module
And although it is a "High" module it is only a 24 byte which obviously gives less options etc
Here is a list of pre facelift cem modules

( note they are "8P0" which is from an A3, the TT didn't get its own )

8P0-907-279: 17 byte (base)
8P0-907-279-A: 17 Byte (Highend)
8P0-907-279-B: 21 bytes (base)
8P0-907-279-C: 21 Byte (Highend)
8P0-907-279-D: 17 Byte (Highend)
8P0-907-279-E: 23 byte (base)
8P0-907-279-F: 23 Byte (Highend)
*8P0-907-279-H: 24 Byte (Highend)*
8P0-907-279-J: 30 bytes (base)
8P0-907-279-K: 30 Byte (Highend)
8P0-907-279-L: 30 Byte (Highend)
8P0-907-279-M: 30 bytes (base)
8P0-907-279-N: 30 Byte (Highend)
8P0-907-279-P: 30 Byte (Highend)
8P0-907-279-Q: 30 Byte (Highend)

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SwissJetPilot · Jun 20, 2018

@ ReTTro fit - So this is why when people ask about Needle Sweep not being available, it's because it simply wasn't an option for these earlier vehicles?

This screen shot is the options available for my vehicle (2007 German Spec) -

ReTTro fit · Jun 20, 2018

Firstly that's a different module, instruments has nothing to do with the cem
Needle sweep isn't just age related, also model related
MY11 onwards is available on any model

And just for info, needle sweep isn't done by the main 07 coding, it's an 10 adaption then it called staging

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SwissJetPilot · Jun 20, 2018

Ah, okay. Thanks! I assumed (wrongly) the needle sweep would have been listed under "Instruments" - thanks for the correction. For those that have it, under which module would it be located?

I'm currently going through all my blocks and adaption options to see what's there. I was also trying to see if there's an adaption requirement for the window regulator since Rip doesn't have a VCDS. I thought it might show up in mine somewhere.

In the case of wanting to turn off the headlight washers permanently, rather than changing the activation time to it's lowest value (50ms) it seems just going into the Long Coding and un-ticking the box at Byte 1, Bit 1 would do it.

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MT-V6 · Jan 19, 2022

SwissJetPilot said:
Ah, okay. Thanks! I assumed (wrongly) the needle sweep would have been listed under "Instruments" - thanks for the correction. For those that have it, under which module would it be located?

I know it is an old thread, but for completeness needle sweep is in: 17 Instruments -> Adaptation -> Channel 36 'Special Functions I'

SwissJetPilot · Jan 19, 2022

Unfortunately Needle Sweep was not an available option on my 2007 .

MT-V6 · Jan 19, 2022

Not easily, would require a software update, followed by editing the EEPROM directly on the PCB, then the adaptation will be possible. So not very straightforward!

SwissJetPilot · Feb 3, 2024

Thankfully, getting the rear lights to come on with the front DRLs is easy with VCDS -

Address 09-Central Electronics -> Byte 0 -> Bit 3: Daytime Running Lights (Scandinavia) active

Or with OBDeleven -

Control Units ->Central Electrics 09 ->Long Coding -> Byte 00, Hex 09 Daytime running lights (East Europa) 100%

Jezzie · Feb 3, 2024

Although it didn’t allow me to do it!

TT'sRevenge · Feb 4, 2024

Didn't allow you to do what?

Also note you have an MY10 which is a facelift car and should have the BCM. All the stuff above doesn't apply/will be completely different on a BCM car.

SwissJetPilot · Feb 3, 2024

Do you have front DRL option...?

How To: Audi TT Mk2 (8J) OEM DRL LED Replacement

For anyone who has purchased the P21W LEDs to replace the OEM DRL bulbs, most have discovered that after installation, you'll get an error code. This will happen even with "CAN-bus compatible" LEDs due to the factory settings in the controller. By changing your factory set-up, you can program...

www.ttforum.co.uk

SwissJetPilot · Feb 4, 2024

+1 TT'sRevenge - I should have mentioned this was on a pre-facelift and may not be applicable to newer models. Be sure to check the functions in your ECU Addresses to see if this is available. The DRL option is available with both VCDS and as a one-touch Retrofit with OBDeleven.

Jezzie · Feb 4, 2024

I have ordinary 21w filament bulbs fitted as drls - I don’t recall the full OBDeleven option list but I do remember the Scandinavian option was greyed out. (We did discuss this a few years ago.)
I probably didn’t have the led drl option available either or I would have tried it.
No worries - just remarking that depending on the car not all things are possible.
Jez

FAQ - VCDS Module 09-Central Electronics & Long Code Helper

How To: Audi TT Mk2 (8J) OEM DRL LED Replacement

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