[a4ss4abt]

Hi Seve, i was not sure that this works on all ecu/engine versions. Also excuse my ignorance but what is GRA?

Thanks!

The GRA is the Geschwindigkeitsregelanlage in german, the CRUISE CONTROL in english.

By the way I should do the ACC retrofit in my Q7 on the next future so I'm very interested to read your thread.

 

[neo_andersson]

For sure i will post all the info.
Now i am doing the pre-installation investigations.

I can tell for sure that the gateway is compatible with acc as i tried coding it and worked, the cluster can also be coded and the acc info appears on the dis, for now i have a message like "acc not available", i am not sure if there is a diferent cluster version for acc in q7.

I understand that radar sensor has to be connected to e-can and now i am trying to figure out if pins 13 and 26 are empty on the gateway connector or i have something already connected there and i have to find a can separating connector.

Btw, do you know which ecu's are connected to e-can?

I do not have the heater on the front licence plate holder therefor i will disable the heater option on the acc using the adaptation ch. 3 until i will find a good enough reason to replace my radiator grille.

The rest seams straight forward but i will let you know next week my findings.

 

[ajax]

AFAIK, the radar is the only component so far to use the e-CAN. Pins 13 and 26 should definitely be empty now.

The heater is part of the radar cover on the A6. I didn't change my front grill, I just cut the bit that was needed to fit the cover.

AJAX

 

[neo_andersson]

On q7 there is a heater Z47 which is mounted on the back of the registration plate holder, therefore you need the front grille with the removable registration plate holder. According to ELSA, Z47 heater is connected on PIN 1 to the same Terminal 15 (+12v) as the acc control unit but PIN 2 comes from the acc control unit which suggest that the heater is mounted outside of the radar.

 

[neo_andersson]

Seve, how sure are you about the login-II codes for disabling/enabling ACC. I used the codes, and now i have an error on the engine "Missing Message from Power Train Data Bus".

The ugly part is that the gear is locked in 3rd and i can not move the car at all. When i put the car in Drive the gear display in the instrument cluster PRNDS turns RED and the engine MIL is ON.

I think i did something VERY wrong in the Engine ECU. How can i reverse it?

PLEASE HELP!!!!!

 

[a4ss4abt]

Seve, how sure are you about the login-II codes for disabling/enabling ACC. I used the codes, and now i have an error on the engine "Missing Message from Power Train Data Bus".

The ugly part is that the gear is locked in 3rd and i can not move the car at all. When i put the car in Drive the gear display in the instrument cluster PRNDS turns RED and the engine MIL is ON.

I think i did something VERY wrong in the Engine ECU. How can i reverse it?

PLEASE HELP!!!!!

Neo what exactly did you do?
I never saw that kind of error in my A8 and I don't think it should be related to the Login anyway you should erase all the fault from the engine and from the ABS and here the procedure from AUDI followed by me:



On a vehicle with ACC control unit, ACC must be enabled and coded in the engine control unit.

Parallel procedure via self-diagnosis to Guided Fault Finding
On diagnostic tester 5051 or 5052 select self-diagnosis:

Switch on ignition
Select 01-Engine electronics and code 2
Disable CCS via login code 16167
Switch off ignition and wait 10 seconds
Switch on ignition
Select 01-Engine electronics and code 2
Activate traction control via login code 13647
Switch off ignition and wait 10 seconds
End

Note on activation of ACC system

The ABS/ESP control unit must be free of faults for ACC operation! Both fault lamps in the dash panel insert must be off.

After disconnecting terminal 30 (or the battery) a steering angle sender calibration must be performed

.

 

[neo_andersson]

i think the code for enabling ACC (traction control) is not working, at least for my TCU. The errors i have now are:

Engine
1.Control module incorrectly coded
2.Implausible signal from TCU - Open circuit

Trasnmission Control Unit
1.Implausible signal form engine control unit - MIL ON

Acc/Start Auth. Control
1.Gear Shift Position P switch - Implausible signal

All this errors came on after i inserted the login-II code for activating ACC.

WHAT I DID:
1.I installed the ACC switch and coded it to the stearring wheel electronics (second to last digit is now 5 instead of 4).
2.Added in installation list of the gateway the ACC controller
3.Coded the ACC in the instrument cluster.
4.Checked the ACC coding.
5.Disabled the ACC heater in ACC adaptation channel 3.

I have no other errors except the 3 errors above, based on my understanding i think it is a communication problem between engine and trasnmission caused by the activation of the ACC.

Do you have the codes to deactivate the acc and re-enable the cruise control, i can disconnect the acc sensor, and investigate further but i have to be able to drive the car.

Thank you for your help.

 

[a4ss4abt]

i think the code for enabling ACC (traction control) is not working, at least for my TCU. The errors i have now are:

Engine
1.Control module incorrectly coded
2.Implausible signal from TCU - Open circuit

Trasnmission Control Unit
1.Implausible signal form engine control unit - MIL ON

Acc/Start Auth. Control
1.Gear Shift Position P switch - Implausible signal

All this errors came on after i inserted the login-II code for activating ACC.

WHAT I DID:
1.I installed the ACC switch and coded it to the stearring wheel electronics (second to last digit is now 5 instead of 4).
2.Added in installation list of the gateway the ACC controller
3.Coded the ACC in the instrument cluster.
4.Checked the ACC coding.
5.Disabled the ACC heater in ACC adaptation channel 3.

I have no other errors except the 3 errors above, based on my understanding i think it is a communication problem between engine and trasnmission caused by the activation of the ACC.

Do you have the codes to deactivate the acc and re-enable the cruise control, i can disconnect the acc sensor, and investigate further but i have to be able to drive the car.

Thank you for your help.

Yes if you want to deactivate everything you have to enter:

Code 16167 ACC/GRA Deactivation

and the others are:

CSS - GRA Activation code 11463
ACC Activation code 13647

Did you check in ELSA for the Q7 ACC operations?

 

[neo_andersson]

My heart is beating again.
I deactivated ACC and enabled CCS and everything came back to normal.

The only explanation i have right now is the following:

My engine ECU has an ABT software. It is possible the login codes for this software to be different. I will check with ABT tomorrow if this was the problem and let you know.

My ACC project is on hold for the moment as activation of this function on the engine control unit disables the car totally and results in communication errors between ECU and TCU.

Thank you a lot for all your help.

 

[a4ss4abt]

My heart is beating again.
I deactivated ACC and enabled CCS and everything came back to normal.

The only explanation i have right now is the following:

My engine ECU has an ABT software. It is possible the login codes for this software to be different. I will check with ABT tomorrow if this was the problem and let you know.

My ACC project is on hold for the moment as activation of this function on the engine control unit disables the car totally and results in communication errors between ECU and TCU.

Thank you a lot for all your help.

GREAT NEWS Neo in the meantime I tried to see on ELSAWIN but I didn't find any code unfortunately...they only mention the VAS 5051B procedure but without any code and also on Ross-tech Wiki I didn't find any information about the ACC. Check with ABT for your ECU and let me know.
My friend Emil alias audiR8 probably can tell us something more about codes for Q7 \\/

 

[neo_andersson]

I can confirm that the codes for disabling acc/ccs and re-enable of ccs worked perfectly, but the problem remain for acc activation at least for the ABT software that i have on my ECU.

I will let you know tomorrow, if your good friend Emil knows something about Q7 ACC, the drinks are on me

PS: Maybe a moderator can move the last few posts to a new thread in the Q7 forum and we can continue the discussion there as this last part is Q7 only related.

 

[craigyb]

I do not think your Can gateway supports ACC, my can gateway which specifically complains about ACC because it is not connected and I cannot disable it at all means it is an ACC gateway. Maybe your problems stem from the wrong gateway.

 

[neo_andersson]

The gateway comunicates with the acc unit, it is declared in the installation list and i connected acc on the e-can network, the pins in the 26 pin connector were unused, the error i had was related to the power train data bus and a miscomunication between ecu and tcu. I think the login code i used to activate acc , actually activated something else related to the tcu. I spoke with abt and i wait now for their input. I left the acc active in the gateway, i have no errors on it, right now i have NO erorrs on any of the car systems except the coding error on the steering wheel due to the acc stick. Just the acc is not working as it is not active at engine level.

 

[a4ss4abt]

Honestly if you are using the original gateway without a specific ACC one the problems on ACC activation become more simple to understand
As told by Craig an ACC gateway WANTS the Distance regulation active otherwise a fault is always written and the fact you have no error on yours confirms that theory.
I believe also that the ABT remap has nothing to do with the ECU's Power Train coding.

 

[neo_andersson]

The gateway i have is HW:4L0 907 468 B/SW:4L0 910 468.
According to ETKA the gateway for vehicles with CCS and ACC is indeed a different part no. hardware wise 4L0 907 468 A but the SW on it is the same 4L0 910 468.

If the gateway i have is not compatible with ACC why this reports no errors? More how can this gateway read the fault memory of the ACC controller?

I read this in the Gateway description in ELSA:

"Variants: There are two different hardware variants. Gateway with or without connection for extended CAN."

The ACC is connected to the extended CAN pins 13 and 26, and works.

I am still digging on this, sorry for repeating things i said earlier but it helps me clear my view.

 

[chaosman]

Your gateway shall be ok. It's just the historic version of the 4L0 907 468 A.
Just ask your service center to look up the historic versions - quite sure then they will find it ;-)
ABT ECUs have a different login code. This also has been reported over here in Germany by someone doing the ACC mod.
No solution so far beside swapping the ECU ...

Is here anyone requiring the coding scheme for the ACC unit? If yes, I could translate a german one to english and publish it here.

 

[neo_andersson]

Chaosman, thanks a lot, please help me with the coding scheme for the acc unit, i can speak/read german, so the link will be enough for me, i can also do the translation.

ABT did not came back to me, i am still waiting, they asked for a couple of days anyway as i am dealing with their local dealer and for sure they have to forward this kind of questions to Germany.

 

[neo_andersson]

I did some testing today with the ACC on my Q7, without success.

I have a big question mark, i bought the ACC sensor from ebay (second-hand) from a german part dealer. He sent me the sensor with the mounting and the connector that had some 25 cm of the original cable.

According to ELSA the pinout is as follows:

PIN 1 = GND
PIN 2 = E-CAN High
PIN 3 = E-CAN Low
PIN 7 = Heater
PIN 8 = 12 volts (Terminal 15) - 5 Amps fused

The original connector that came with the sensor from another Q7 had also PIN 5 and PIN 6 connected with wires colored orange/green and orange/brown which is consistent with the CAN Low/High color codes of the Q7.

There is no refference in ELSA about the PIN 5 & 6. They should not be connected anywhere.

Anyway, i connected them today to the left side CAN separating connector.
The result was all communications to the gateway were blocked, i could not access any of the car systems by vag-com.
After i disconnected this 2 wires everything came back to normal.

Any idea?

 

[NikolasZ]

I did some testing today with the ACC on my Q7, without success.

I have a big question mark, i bought the ACC sensor from ebay (second-hand) from a german part dealer. He sent me the sensor with the mounting and the connector that had some 25 cm of the original cable.

According to ELSA the pinout is as follows:

PIN 1 = GND
PIN 2 = E-CAN Low
PIN 3 = E-CAN High
PIN 7 = Heater
PIN 8 = 12 volts (Terminal 15) - 5 Amps fused

The original connector that came with the sensor from another Q7 had also PIN 5 and PIN 6 connected with wires colored orange/green and orange/brown which is consistent with the CAN Low/High color codes of the Q7.

There is no refference in ELSA about the PIN 5 & 6. They should not be connected anywhere.

Anyway, i connected them today to the left side CAN separating connector.
The result was all communications to the gateway were blocked, i could not access any of the car systems by vag-com.
After i disconnected this 2 wires everything came back to normal.

Any idea?

You are not supposed to connect to the CAN-separating connector on the left side. You should connect it on to the J533 Diagnose Interface directly for the Extended CAN-bus.

Depending on what model you have on the J533 you should connect it to the appropriate pins.
PIN 2 = E-CAN Low is actually PIN 2 = E-CAN HIGH and vice versa.

Anyway...
PIN 2 = E-CAN High goes to J533 T26b/13 (until May2008 ) orange/black
PIN 3 = E-CAN Low goes to J533 T26b/26 (until May2008 ) orange/brown
or
PIN 2 = E-CAN High goes to J533 T20/17 (from June2008 ) orange/black
PIN 3 = E-CAN Low goes to J533 T20/7 (from June2008 ) orange/brown

Good luck!

 

[neo_andersson]

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