ACC and braking guard unavailable. Video module location in a car with surround view?

[Y2K2]

Hoping to get some help from someone with similar configuration. I have a 2015 A6 Quattro Premium Plus which includes the 360 degrees cameras (surround) option. I got the dreaded "ACC and braking guard unavailable" error in the summer. Scanning it with OBDEleven brings the same code as I have seen in other threads:

---------------------------------------------------------------
8E Image Processing

System description: BV-SG
Software number: 4G0907107E
Software version: 0041
Hardware number: 4H0907107
Hardware version: H32
Serial number: 00500012300614768603640000
ODX name: EV_BC7
ODX version: 001001
Long coding: 04C198180111

Trouble codes:
C110702 - Video line for image processing Signal error
static
---------------------------------------------------------------

The camera itself seems to be responding without any codes:

---------------------------------------------------------------
85 On Board Camera

System description: DPC-SG
Software number: 4G0907217A
Software version: 0038
Hardware number: 4H0907217A
Hardware version: H27
Serial number: 26213002542100000000368370
ODX name: EV_OnBoardCamerDPC
ODX version: 001007
Long coding: 6A060000

Trouble codes:
No trouble codes found

---------------------------------------------------------------

Now, I want to test the cable continuity to rule out cable issues (best case scenario) but the problem is that I can't find where that camera cable goes. From documentation that I got, it seems that the video processing module should be located under the passenger seat. I got to that module and although there is one there, it is not where this camera is connected to. My car has a surround view so it has four additional cameras: two on the mirrors, one in front, and one in the back - so those four cameras indeed go to the unit that is under the passenger seat. Only those four cameras go there - there are four connectors on that unit. The ACC camera that is behind the rear view mirror cable does not go to that module under the passenger seat carpet. I signed up for erWin for a day to download all documentation, and even there it shows the module being under the passenger seat but it is not the same configuration that my A6 has. My only guess is that there is another module under the DRIVER seat maybe, that's where it may go... but it is a bitch to get under the carpet on the driver side, so I was hoping someone may confirm if they have 360 view as well, where that damn module is located. I am ready to pull my hair out... spent several days googling and searching... and came up with nothing concrete. Any help is appreciated.

Also, if someone has any tricks on how to lift the driver side carpet without taking half of the car apart, I am all ears. I removed the side trims, hood release, foot well trim, but the carpet is not lifting... it was much easier to lift it on the passenger side. Would love to find out if there is a way to get under there. Thank you.

[Audisthesia]

The Image Processing Control Module - J851- is located in the front passenger seat footwell, that is correct. There are 2 connectors to this module.

The Camera Control Module -J852- is up in your windshield. (5 pin and 12 pin connectors)

The Lane Change Assistance Control Module -J769- / -J770- is located in your rear bumper cover. (uses 12 pin connector)

If you go under the driver's seat, all you're going to find is frustration and wasted time.

[Y2K2]

Thank you for your response. So when I took out the camera module from under the passenger seat - it looked exactly like this (this is not mine, but the same):

https://photos.app.goo.gl/iUT7LGA3uF6TrCtr6

Note that there are four camera inputs there:

https://photos.app.goo.gl/XTtVZT5Re32jBc4w6

Those inputs were for the four surround cameras: one on driver side mirror, one on passenger side mirror, one on the front grill, and one on the back. I tested it by unplugging each connector while looking at the 360 output on the display and each time I would disconnect one camera, one of the cameras would turn grey on the display with no image. So this confirmed that this video module under the passenger seat had only inputs for the surround view and is not J851 module that I am looking for. There was no other camera input on that module so I don't know where the camera that is behind the windshield goes. According to the error in the log, the video processor is Software number: 4G0907217A, Hardware number: 4H0907217A and searching for this part brings a different processor:

https://photos.app.goo.gl/4Y43RigcGiJtJqx36

It has only one camera input:

https://photos.app.goo.gl/kzrRzFXQCwvFZhnd8

So I am confused since this is what I expect the J851 look like and I have no idea where it is.

The Image Processing Control Module - J851- is located in the front passenger seat footwell, that is correct. There are 2 connectors to this module.

The Camera Control Module -J852- is up in your windshield.

The Lane Change Assistance Control Module -J769- / -J770- is located in your rear bumper cover.

If you go under the driver's seat, all you're going to find is frustration and wasted time.

[Audisthesia]

[Y2K2]

Yup, have this diagram and the module under passenger seat does not look like that. It has four camera inputs and none of them are from the camera behind the mirror. What I have there is this part: 4H0907428B which is a back camera/top view module. Under there is more somewhere else under the carpet....

[Audisthesia]

The issue could also be the camera in the windshield. If you search your error code there's a number of threads regarding this.

[Y2K2]

OK, I think I am an idiot :-) They are probably BOTH located under the passenger seat area. So the module that I looked at before that has four cameras input is called J928 "Peripheral Camera Control Module" and it is located under the passenger front seat:

https://ibb.co/Pt5vnZ6

I pulled it out before and that was definitely not J851. However, per diagram (you posted that picture above and I have it as well but it didn't click for me until I re-read it) the J851 module is located in the front passenger seat footwell so I simply didn't get to it I hope, it is probably further towards the front of the car I guess. I will remove the trims again and lift the carpet there and see if I can find it further up. Thank you!

Was yours attached to the bracket with 4 bolts?

The camera in the windshield is Lane assist, have you looked at the module in the rear bumper?

[Audisthesia]

The 5 pin cable (4G1971192A) comes off of J852 up in the windshield... I'm assuming this is the cable you are trying to chase down?

[Y2K2]

The 5 pin cable (4G1971192A) comes off of J852 up in the windshield... I'm assuming this is the cable you are trying to chase down?

Yup, that's the one. Goes from J852 to J851 module which I did locate now right next to the four-camera one (in front of it) thanks to you pointing out that it should be in the same location. I will remove it tomorrow and will try to check the cable pins for continuity.

The issue could also be the camera in the windshield. If you search your error code there's a number of threads regarding this.

I am hoping that the cable is bad since it would be the easiest to replace without coding and calibration needed, which was the case for a few people I saw. I read every single thread on this issue on this forum and several others, basically every hit on Google I could find. Looks like it could be a number of things, but I am hoping since the camera module is testing ok in VCDS and OBDEleven, that it is a cable that is bad. Of course if it is a J582 camera or J581 module... it's a different (much more expensive) story which would require expensive parts and a trip to a dealer to code and calibrate. I think if it is either one of those, I may just have to live with it not working. Don't care about cruise control, but emergency breaking would be nice to get back for safety just in case.

[Audisthesia]

Yeah, from all the threads I've seen, its the camera module in the windshield or the cable. Haven't seen anyone say it was the box under the seat.

For a new OEM cable, 4G1971192A, is over 200 on most Audi parts site; about 160-180 on eBay.

It's $112 HERE if you don't mind waiting for shipping from EU.

[Y2K2]

Thanks. Well, I tested the cable and all four connections passed continuity, including the ground outer rim. So nothing obviously wrong with the cable. There may still be an issue with the actual plugs making full contact but it is very unlikely and I would expect it to at least cause intermittent connection when wiggles around. It looks like the camera is the problem after all. I wish I had an access to a working one before I order one without ability to return it. Looks like I will be hunting for a used camera on eBay and assuming it is the cause of the problem will need to suck it up and have it coded and calibrated at the dealer.

Yeah, from all the threads I've seen, its the camera module in the windshield or the cable. Haven't seen anyone say it was the box under the seat.

For a new OEM cable, 4G1971192A, is over 200 on most Audi parts site; about 160-180 on eBay.

It's $112 HERE if you don't mind waiting for shipping from EU.

[RPMtech147]

Yeah, from all the threads I've seen, its the camera module in the windshield or the cable. Haven't seen anyone say it was the box under the seat.

For a new OEM cable, 4G1971192A, is over 200 on most Audi parts site; about 160-180 on eBay.

It's $112 HERE if you don't mind waiting for shipping from EU.

I've replaced a number of the cameras for that fault. I actually keep that cable just for testing. (plug it in without going through the hassle of routing it) I've never seen a bad cable.

The camera is pricey, plus it has to be coded/programmed, then it has to have the alignment/calibration done, and that's really expensive at Audi.

[Optimus247]

My issue with the ACC/Emergency Braking ... was fixed at the Dealership with a Re-Cal ... just an FYI ... I think one of my front lower cameras took a bird strike ...

The bird stood in the center of the road (2 lane rural road) ... saw me coming (I was only doing 60 mph) and started walking to the edge of the road ... he misjudged my closing speed ... another few miles down the road ... I could not set my ACC ... ugghh ... I tried a few remedies ... during the oil screen replacement recall ... I had them check the ACC/emergency braking ... a re-cal fixed the issue ...

[Y2K2]

Sounds like you got lucky! I paid my Audi dealer for diagnostic and asked if they can specifically tell me which component failed and needs replacement. They told me it is a camera module and it will be like 2,000 - 2,500 to replace because of the part costs, installation, coding, and calibration involved. Seeing how many people had this issue on different forums... really pissed that Audi doesn't address it when it happens since this is a non-consumable part and it should not be failing for no reason.

My issue with the ACC/Emergency Braking ... was fixed at the Dealership with a Re-Cal ... just an FYI ... I think one of my front lower cameras took a bird strike ...

The bird stood in the center of the road (2 lane rural road) ... saw me coming (I was only doing 60 mph) and started walking to the edge of the road ... he misjudged my closing speed ... another few miles down the road ... I could not set my ACC ... ugghh ... I tried a few remedies ... during the oil screen replacement recall ... I had them check the ACC/emergency braking ... a re-cal fixed the issue ...

[madyspop]

Sounds like you got lucky! I paid my Audi dealer for diagnostic and asked if they can specifically tell me which component failed and needs replacement. They told me it is a camera module and it will be like 2,000 - 2,500 to replace because of the part costs, installation, coding, and calibration involved. Seeing how many people had this issue on different forums... really pissed that Audi doesn't address it when it happens since this is a non-consumable part and it should not be failing for no reason.

If you haven't had the oil strainer recall work done you can get it calibrated then as it's part of the recall work.

[Audisthesia]

If you haven't had the oil strainer recall work done you can get it calibrated then as it's part of the recall work.

SLICK SUGGESTION

[Y2K2]

If you haven't had the oil strainer recall work done you can get it calibrated then as it's part of the recall work.

SLICK SUGGESTION

Definitely a slick suggestion... unfortunately it doesn't look like the recall includes the A6.