ACC + Brake Guard Deactivation - VCDS

[Cayo71]

Guys,

Is there a way to deactivate/convert to non-ACC via VCDS Coding? If so has anyone done it successfully?

Thanks!

[GilliamOS]

What's the issue to why'd you do this?

[Cayo71]

The forward onboard camera is acting up and the image processing module is throwing codes. I see this becoming an expensive fix and TBH I was never a big fan of it operates in traffic and when changing lanes. I rather have a conventional Cruise Control. So If I have the option to disable it via coding and making it operates like there are no sensors connected I'd like to go that route.

[GilliamOS]

Hmm, that would be interesting if you could. I thinking finding a car like yours in options minus the ACC and getting its coding to compare against would make it easier to figure out what needs to be changed. There are times I wish the ACC could function at a "dumb" level like when I'm cruising along minding my own business and it says there's no sensor "vision" despite them being clean, clear and unobstructed. It's annoying that it's all or nothing.

[gk1]

Sub'd
This is an often asked, but I think not yet answered question.
Can ACC equipped cars be reverted to regular cruise control?
I suspect the answer is "yes", but I personally do not know how.
It might be as simple as unchecking the ACC box in the long coding. However I fear there are multiple places to modify and if not done correctly may make things worse. It would take a soul braver than mine to try it out and report back.

[Audisthesia]

ACC can simply be turned on/off. Changing it to standard cruise, fair question. Comparing code from non ACC car of same year would be best bet, as gk1 said likely multiple code changes required. However, you mention the forward onboard camera (I assume you mean camera in top center of windshield) acting up. Perhaps I'm mistaken, but that camera is for lane assist, not ACC. ACC uses 2 sensors in the front bumper, not that camera.

[Cayo71]

ACC can simply be turned on/off. Changing it to standard cruise, fair question. Comparing code from non ACC car of same year would be best bet, as gk1 said likely multiple code changes required. However, you mention the forward onboard camera (I assume you mean camera in top center of windshield) acting up. Perhaps I'm mistaken, but that camera is for lane assist, not ACC. ACC uses 2 sensors in the front bumper, not that camera.

Yeah it is the windshield camera and ACC relies on it together with the bumper-mounted sensors to work as intended. That camera is also used for lane assist which is also not working for me.

Let's see if someone can post their long coding info on their non ACC cars.

[widebodyfx]

That camera is for high beam assist too which makes the coding even more tied together, I used to have ACC issues on my S6 from being slammed so would've liked to turn off the ACC function. Hope the answer is found, the dash alerts are annoying reminders.

[Audisthesia]

That camera is for high beam assist too which makes the coding even more tied together, I used to have ACC issues on my S6 from being slammed so would've liked to turn off the ACC function. Hope the answer is found, the dash alerts are annoying reminders.

Isnt the HBA sensor on back side of the mirror?

[widebodyfx]

You're right that one is the main imaging sensor for HBA when you look at the retrofit kits, confused it to when I was doing the Matrix retrofit Alex@Europrice asked me to checked the upper windshield camera part number.

[gk1]

I took a quick look just at long coding and there are at least 7 modules that have reference to ACC in the long coding and I could not look into my CAN (19) module long coding because VCDS does not have information for that for my ECU.

module 34 Level control
byte 2 - bit 1 checkbox regarding ACC

module 10 Park/steer assist
byte 1 - bit 3 - checkbox regarding ACC

module 09 Cent. Electr.
byte 7 - bit 1 - checkbox regarding ACC

module 17 Instruments
byte 1 - bit 5 - checkbox to enable regular CC ?
byte 4 - bit 2 - checkbox regarding ACC

module 01 Engine
byte 5 - bit 5-6 - dropdown box to change between ACC and regular CC or no CC?
Would this one dropdown change all the other check boxes automatically?

module 5F information elect.
byte 6 - bit 3 - checkbox regarding ACC

module 8E image process
byte 1 - bit 7 - checkbox (distance regulation installed) ?
Is this used for pre-sense or other safety features and maybe should not be unchecked to switch to regular CC?

Anyone brave enough to try? I am not.

[GilliamOS]

You would probably need to turn it off in the BCM as well so it isn't always looking for it.

[Audibot]

W.r.t. changing lanes, have you just turned off lane assist? My ACC is perfectly fine changing lanes.

[Cayo71]

I’m getting close to trying making the changes but I’ll wait a little longer to see if some guru here has the answers on how to do it.

[fixedhat313]

Following up on this thread, did you ever try the change?

[Cayo71]

Still waiting for someone else to do it successfully.

[fixedhat313]

Still waiting for someone else to do it successfully.

What exactly led you to consider this path? Curious because I have a fault for image processing cable for ACC. Replaced cable, didn’t work. Going to be replacing the module itself soon and if that doesn’t fix, going to be looking at disabling ACC all together I guess. Can’t pay 1/4 the cars value to Audi to fix this lol

[Cayo71]

What exactly led you to consider this path? Curious because I have a fault for image processing cable for ACC. Replaced cable, didn’t work. Going to be replacing the module itself soon and if that doesn’t fix, going to be looking at disabling ACC all together I guess. Can’t pay 1/4 the cars value to Audi to fix this lol

Exactly what you are saying. I was never a fan of the ACC. My wife’s SUV ACC is better than the one in my car when it was working.
I haven’t changed the cable, I don’t know how difficult it is and if that doesn’t cure the problem it will be the camera itself of the image processing unit. Both require going to the stealership. I want to make it work as standard CC for those reasons.


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[Audisthesia]

I guess I'm the only one who likes ACC. It works awesome on the highway. Sure, you can disable ACC using VCDS, but you will get a plethora of error codes and you can't convert it to "dumb" cruise control. That would require reprogramming some stuff so the car isn't looking for all the ACC hardware.

[fixedhat313]

I guess I'm the only one who likes ACC. It works awesome on the highway. Sure, you can disable ACC using VCDS, but you will get a plethora of error codes and you can't convert it to "dumb" cruise control. That would require reprogramming some stuff so the car isn't looking for all the ACC hardware.

I might be wrong but I think the only reason someone would want to do this is if there are errors that no one can solve. In my case, I’m considering a new car if I can’t resolve my ACC problem, that’s how important it is to me. But, I figured it would be easier to sell a car that at least has “dumb” cruise control as opposed to none at all.

[Audisthesia]

The issue is the inter-module dependencies.. You can turn it off but as other have noted there are several other modules that interact with ACC.

[fixedhat313]

In case anyone is in the same boat and running out of options with ACC / Lane Assist, I replaced the camera module that sits behind the rearview mirror with a used one for $400. My issue is resolved, now I just need a $300 calibration.

[Cayo71]

In case anyone is in the same boat and running out of options with ACC / Lane Assist, I replaced the camera module that sits behind the rearview mirror with a used one for $400. My issue is resolved, now I just need a $300 calibration.

Did you get exactly the same model number? There are different revisions and model numbers for different Audi models but they all look physically the same. Curious to know also how hard it was to replace it. Let us know how it goes after calibration.

[fixedhat313]

Did you get exactly the same model number? There are different revisions and model numbers for different Audi models but they all look physically the same. Curious to know also how hard it was to replace it. Let us know how it goes after calibration.

For this camera module, I didn’t see any revisions. I replaced it with the same exact part number from the same year A8. After plugging in the new camera module, the car threw 83 faults. It had to be long coded in VAG COM. There was a newer revision for the image processing module under the seat. I tried matching part #s of the imaging module but that didn’t fix it for me.

To replace, had to take off the cap behind the rear view mirror. The plastic piece holding the module in place and against the windshield is very brittle from the years of sun light. I actually couldn’t get the old module out without completed destroying the plastic holding it in place so I’m having the dealership do that, since they’ll have to calibrate it anyway.

Since I’m this far into explaining things, my car was throwing a fault for the image processing cable. I replaced the cable first and that didn’t fix.

I’ll let you know about the calibration.

[fixedhat313]

Giving hopefully the last update on this - had the camera module installed and calibrated by Audi. Took about 3.5 hours. They charged me a flat $300 for calibration and labor. They said the module had to be programmed, even though I long coded it and it was only throwing a calibration fault after that.. not sure if that’s true.

[Cayo71]

That wasn’t bad. Is it working properly now?

[fixedhat313]

That wasn’t bad. Is it working properly now?

Only did one drive so far but yeah seems normal. Will update if not.

[zkrr]

For this camera module, I didn’t see any revisions. I replaced it with the same exact part number from the same year A8. After plugging in the new camera module, the car threw 83 faults. It had to be long coded in VAG COM. There was a newer revision for the image processing module under the seat. I tried matching part #s of the imaging module but that didn’t fix it for me.

Can you share what you needed to do to code for the replacement camera?

I have a 2012 A7 with the same problem, and I’ve found a used camera (same part number, from a wrecked 2012 A7). Before I shell out the $300 for the replacement camera, I’d like to get a sense of what I’m in for with coding the car to recognize the replacement. I have VCDS.