[NikolasZ]

So, why on the orriginal connector there were also pins 5&6 connected?

Don't know. They're not supposed to be connected anywhere.

 

[neo_andersson]

Important progress

I have replaced the Gateway today with the E-Can version part. no. 4L0 907 468 C.
I went to an Audi Dealer and asked them to swap the Gateway, remove Component Protection and do all the necessary coding in order to have a functional ACC.

They did everything and at engine and transmission level everything is OK, gateway comunicates with the ACC sensor prefectly, even the menus in the MMI are now red.

The problem is that they are stuck at the ABS controller. According to the coding they did on the ABS, i have now the following errors:

On the instrument cluster : AUDI DOWN HILL ASSIST MALFUNCTION
On the ABS DTC: 01044-Control Module Incorrectly Coded and 01673-Potentiometer for Diaphragm Position in Brake Booster: Electrical Fault in Circuit

I suspect they did not put the right coding in the ABS Control Unit. My assumption is that instead of activating the ACC option in the ABS they enabled Down Hill Assist or something similar.

My original coding of the ABS was : 0038033
New coding that Audi put it is : 0562321

Does anybody know the correct coding value of the ABS controller in order to work with ACC?

Maybe someone that has a Q7 with factory fitted ACC can help me and post the coding of the ABS controller. I thank you all in advance for your help and support.

 

[NikolasZ]

I have factory fitted ACC on my Q7 2011.

Address 03: ABS Brakes Labels: User\4L0-910-517.lbl
Part No SW: 4L0 910 517 M HW: 4L0 614 517 L
Component: ESP ALLRAD MK25E1 0020
Revision: 00H02001
Coding: 0627841
Shop #: WSC 31414 790 00001
No fault code found.
-------------------------------------------------------------------------------
Address 13: Auto Dist. Reg Labels: None
Part No SW: 4L0 910 561 A HW: 4L0 907 561
Component: ABSTANDSREGELUNGH06 0160
Revision: -------- Serial number: 00000000000000
Coding: 0031161
Shop #: WSC 31414 790 00001
No fault code found.
-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533) Labels: 4F0-907-468.clb
Part No SW: 4F0 907 468 Q HW: 4F0 907 468 G
Component: GW-BEM 5CAN-M H06 0047
Revision: MB300033 Serial number: 3300M107188158
Coding: 00CB03
Shop #: WSC 31414 790 00001
No fault code found.

Good luck!

 

[neo_andersson]

Thanks Nikolas, i tried with the coding of your ABS but it is not working, i have the same error on the FIS when i start the car : "AUDI HILL ASSIST MALFUNCTION".

I spent few hours in ETKA/Elsa and now i learned that ACC is using a different Brake Servo Unit (part.no. 7L8 612 105 F) that has the Distance Sensor for Diafragm (part.no. 7M3 927 810) also known as G420.

This sensor (G420) is connected to the ABS Control Unit (J104) on a 3 wire cable on pins 25,27 and 38.
The ABS Control Unit (J104) is ACC capable as it is the same part. no for both PRs ACC and CCS.

I am now intrigued how the other guys who retrofitted ACC on A6 managed to make it work without replacing the Brake Servo Unit and adding the G420 sensor and more without changing any of the coding in the ABS Control Unit.

For now i left the coding as it was programmed by Audi.
The error i get on the ABS Controller is:

Tuesday,26,October,2010,16:40:42:21461
VCDS Version: Release 805.0

Address 03: ABS Brakes
Control Module Part Number: 4L0 910 517 A
Component and/or Version: ESP ALLRAD MK25E1 0130
Software Coding: 0562321
Work Shop Code: WSC 10102
1 Fault Found:

01673 - Potentiometer for Diaphragm Position in Brake Booster
012 - Electrical Fault in Circuit
Freeze Frame:
Fault Status: 01101100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 0
Mileage: 88303 km
Time Indication: 0
Date: 2010.10.26
Time: 16:40:03

Freeze Frame:
Count: 128
Count: 12545
Count: 224
Count: 49920

Any ideea? Right now i need some help.
I hope to figure out the way the other guys did it in A6 before returning to Audi and ask them to verify the coding of the ACC.

Also i could not find any refference on the Q7 manual or internet about a system called "Audi Hill Assist", not to mention its functionality.

 

[neo_andersson]

Update

I manage to find an old scan and i have reverted the coding of the ABS controller to its original value.

With this coding i get "Control Module Incorrectly Coded" error in ABS Controller but the error related to the "Potetiometer for Diafragm Position" is gone.

ACC is reporting now 2 errors:

1.Check ABS Controller DTC Memory - this is caused by the incorrect coding error in ABS;
2.Sensor misaligned - it seams that i have to do the required calibration;

Next step for me is to schedule a visit in an Audi Service that has the required tools for ACC sensor calibration.

Also i have to figure out, maybe with some help from you guys, the correct coding for the ABS Controller with ACC.

If someone has a Q7 3.0TDI, EU Model, manufactured between 2007-2009 and ACC factory fitted, i kindly ask him/her to post the coding of the ABS controller.

Thanks, i will keep you posted.

 

[neo_andersson]

Update 2

I have calibrated the ACC sensor today and figured out the coding for the ABS controller which is 0562321.

The ACC is still not working as i have to replace and add some other parts in the ABS system.

This are:

Brake Servo with Dual Diafragm = 7L8 612 105 F
Distance Sensor = 7M3 927 810
Connector for distance Sensor = 3D0 973 703

My next step is to order the sensor and see if i can attach it to the brake servo i have on the car.

Looking in ETKA it seams that there is an open sensor connection on the actual Brake Servo covered by a removable cap (part.no. 861 612 175), i will order the sensor first and check if it is possible to adapt it to the actual brake servo unit, if not i will have to go all the way.

ACC for Q7 is not an easy task and even with SH parts can be quite expensive.

 

[chaosman]

Did you try ACC with your original ABS coding?
The "Check ABS Controller DTC Memory - this is caused by the incorrect coding error in ABS" is normal - at least on an A6.
That fault entry is because the pressure sensors are not installed and therefore cannot be accessed (the values) by the ACC unit.
However, it seems that that specific fault code did not get classified as "stop system function". Maybe accidential when developing the system.

"Sensor misaligned" definitely stops ACC from working. But that one shall have been eleminated by sensor adjustment.

Without adding brake sensors the ABS unit does not have to be recoded.

 

[neo_andersson]

It is not working.
When i keep my original coding of the abs control unit, i get the error "incorrect coding", and the acc is not working. When i try to activate acc, i get the error "acc not available" in the FIS.

With the correct coding of the abs, i get the error related to the diafragm position sensor. in q7 there is no need for the pressure sensors. there is an additional pressure sensor mounted on the abs servo unit that reads the position of the diafragm. i guess that this reading helps the acc to know how much brake to apply in order to stop the car. Remember that in Q7 the car brakes to a full stop if necessary, also the car has an additional system that comes with acc, and this is "Audi Braking Guard" which notify the driver if a collision with an object in front is imminent.

I ordered this sensor already, the delivery should take place Thursday and i will see what will happen then.

I hope to find a way to fit it on the abs servo unit, as i am not sure the mounting hole is there.

Keep you posted.

 

[audi80]

It is not working.
When i keep my original coding of the abs control unit, i get the error "incorrect coding", and the acc is not working. When i try to activate acc, i get the error "acc not available" in the FIS.

With the correct coding of the abs, i get the error related to the diafragm position sensor. in q7 there is no need for the pressure sensors. there is an additional pressure sensor mounted on the abs servo unit that reads the position of the diafragm. i guess that this reading helps the acc to know how much brake to apply in order to stop the car. Remember that in Q7 the car brakes to a full stop if necessary, also the car has an additional system that comes with acc, and this is "Audi Braking Guard" which notify the driver if a collision with an object in front is imminent.

I ordered this sensor already, the delivery should take place Thursday and i will see what will happen then.

I hope to find a way to fit it on the abs servo unit, as i am not sure the mounting hole is there.

Keep you posted.

did you get the ACC working...........?
I have problem with this retrofit in my A6 2010, can not get any contact with modul [13] with VCDS, anybody had this problem?

 

[neo_andersson]

you need to replace the gateway, the standard gateway does not have E-CAN port, until you replace it with the correct version there is no way you can connect to the ACC controller.

I have continued the ACC retrofit posts in the Q7 section.

 

[audi80]

you need to replace the gateway, the standard gateway does not have E-CAN port, until you replace it with the correct version there is no way you can connect to the ACC controller.

I have continued the ACC retrofit posts in the Q7 section.

What is the E-CAN port?
How can I know what partnumber I need, the Audi dealer has no idea, do you know how to get the rigth one?
Don't you think the gateway in my A6 2010 mod support E-CAN? Partnumber 4F0 907 468M
Thank you!

 

[neo_andersson]

You need Gateway part. no. 4F0 907 468 N which has PR (option) 8T4 (Adaptive Cruise Control).

 

[audi80]

You need Gateway part. no. 4F0 907 468 N which has PR (option) 8T4 (Adaptive Cruise Control).

Ok I had a look in ETKA and was afraid of that, do you know how to get the right one with PR 8T4, the Audi dealer tell that he can not know what PR number the part have, he only look at the chassis number to get the right PR number, not easy..........

 

[neo_andersson]

You can order directly the part no i gave you, then after installation the dealer has to remove "component protection" and if installed corectly you should be able to access the acc controller. The component protection will have to be removed from the acc controller as well.

 

[audi80]

You can order directly the part no i gave you, then after installation the dealer has to remove "component protection" and if installed corectly you should be able to access the acc controller. The component protection will have to be removed from the acc controller as well.

Ok I will give it a try, Thank you, neo

 

[audi80]

You can order directly the part no i gave you, then after installation the dealer has to remove "component protection" and if installed corectly you should be able to access the acc controller. The component protection will have to be removed from the acc controller as well.

Do I have to calibrate the ACC or will it work without any calibration?

 

[neo_andersson]

It requires calibration. After you install it and drive for few minutes, the sensor will measure its position and if it is out of angle will record a permanent error "Sensor Misadjust" You will not be able to erase this error until the calibration procedure is completed succesfully and this can be done only at Audi Dealer.
Until the sensor is re-aligned the system will not work.

 

[audi80]

It requires calibration. After you install it and drive for few minutes, the sensor will measure its position and if it is out of angle will record a permanent error "Sensor Misadjust" You will not be able to erase this error until the calibration procedure is completed succesfully and this can be done only at Audi Dealer.
Until the sensor is re-aligned the system will not work.

OK, thank you for info, Audi want a lot of money for this job

 

[audi80]

At last I get both the ACC and TPMS working on my facelift A6 4F.
Tanks a lot to all how helpt me with this retrofit, a special thanks to chaosman,
he know's a lot of this retrofit

 

[chaosman]

Thanks!
However, I am just too rarly online here ...