Matrix Beam System Failure

[Architex_mA8tey]

Originally Posted by Markr

Thanks Neil, I am hoping it will be going in tomorrow or Monday, but good to know you have VCDS for the future - they are sorting out a suitable loaner for me - I have asked if they have a Q2, as not driven one of those yet. They will definately tell me what the issue and fix was, as have corporate relationship with them too, as discussed when we met. They are ordering some rear footrests for me too - got the bug after going in your car! - they are on back order though, so waiting to see what date they get given.

Great just let me know if you ever need a scan, not a problem.
I did look for more footrests for you but only found one second hand pair for sale at A8 Parts but they are in a beige colour which wasnt suitable. I'll be interested to see if they can be purchased on back order as I might get another set myself if they are

Originally Posted by paulrstaylor

If one side is working as it should my money would be on the light unit itself - or at least something specific to that side. If the sensor was faulty it would lock out both sides?

I agree with Paul, thats good logic. Really amazed as I wouldnt have expected one to fail/play up so early in its life, I wonder if Audi know of any "developing issues"

[paulrstaylor]

I don't have them on my own car and having done a lot of miles with them and without I don't think it is a "night and day" that they are better. The matrix function is better at "shuttering" on the motorway, but on a other roads I prefer the adaptive xenon. I also disliked the Fresnel effect on the LED lights caused by the multiple beams from separate LEDs - but I can happily live with either until they fit lasers to the D5!!!!

Regarding the fault, each headlight is addressable as a subsystem of the Headlight Range controller (55), see a scan from a working 66 plate car below. I suspect this module would detail the problem on your car

Address 55: Headlight Range (J745) Labels: 4H4-907-357-V2.clb
Part No SW: 4H4 907 357 E HW: 7P6 907 357 B
Component: MxB-ECU 001 0100
Revision: -------- Serial number: --------------
Coding: 02F6022022130200
Shop #: WSC 02391 785 00200
ASAM Dataset: EV_HeadlRegulAUDIMXBAU64X 005009
ROD: EV_HeadlRegulAUDIMXBAU64X_005_AU57.rod
VCID: 346CF5689FD598E21D-8060

Led Headlamp Powermodule Left:
Subsystem 1 - Part No SW: 7PP 941 472 K HW: 7PP 941 472 K Labels: 3D0-941-329.CLB
Component: LED LeiMo li. H07 7570
Coding: E00300

Led Headlamp Powermodule Right:
Subsystem 2 - Part No SW: 7PP 941 472 K HW: 7PP 941 472 K Labels: 3D0-941-329.CLB
Component: LED LeiMo re. H07 7570
Coding: E00300

Matrix Headlamp Powermodule 1 Left:
Subsystem 3 - Part No SW: 4H0 941 329 A HW: 4H0 941 329 A Labels: 3D0-941-329.CLB
Component: MxB LeiMo li. H03 0031
Coding: E00300

Matrix Headlamp Powermodule 1 Right:
Subsystem 4 - Part No SW: 4H0 941 329 A HW: 4H0 941 329 A Labels: 3D0-941-329.CLB
Component: MxB LeiMo re. H03 0031
Coding: E00300

[Markr]

Well this is strange. 2 days before going in, system started working perfectly again. No faults found, no messages, no codes.

Dealer has gone back to factory for advice, so continuing asis until we get a response. Car needs a service in c. 2000 miles anyway, so hopefully it will hang ok until then. I can then get a loaner whilst they do more investigation and service it.

Might have my rear footrests in by then too