Hi,

I developed a high beam assist fault and decided to swap out the mirror and camera for a second hand one. this seemed ok for a day or two then the same fault has occurred. is it just coincidence and i need another ?

VCDS latest read on module

 

Address 20: High Beam Assist. (J844)       Labels:| 8X0-857-511.clb
   Part No SW: 5G0 857 511 D    HW: 5G0 857 511 
   Component: FLA           H04 0002  
   Revision: AA001001    
   Coding: 01028F6B76765D525220343E01
   Shop #: WSC 73430 031 00126
   ASAM Dataset: EV_HighBeamAssisAU37X 001009
   ROD: EV_HighBeamAssisAU37X.rod
   VCID: 2B03060FC38421830A1-807E

1 Fault Found:
4186894 - Internal Control Module Memory Check Sum Error 
          B2000 47 [009] - Watchdog/safety µC failure
          [Steuergerät: defektECU: defect]
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 3
                    Fault Frequency: 1
                    Mileage: 113537 km
                    Date: 2021.05.02
                    Time: 13:07:49

 

thx in advance

The answer is in the message:

 

Watchdog/safety µC failure

 

The module is knackered.

Nothing I’ve done then ? Just seemed ok when I first put the replacement on.

coincidence ?

The only other option is that if you put on a new module; the ECU might not know anything about it.  That would also cause that error.  Some time on ODIS maybe required.

No, it’s a swap like for like. I’ll message the seller tomorrow and see if they have a replacement.

 

many thanks for the help 👍

Is it just me or is the Light / High Beam Assist equipment very failure prone.

I've had mine fail some years back and again in the last few weeks. At £800 to replace I really don't think it's worth sorting.

 

I can't imagine the headache when other more key aspects of these high tech cars start to fail. I bet other aspects of the tech are also more failure prone than the mechanicals 😰

Edited 20 June, 20214 yr by RB79

I have the OPs error on a mk7 golf R. I bought the car with the fault, I knew about it but it does seem disappointing they are so failure prone and Expensive as well! I'm not sure I will fix it, even with a 2nd hand part.  

They’re £100 plus second hand, £664 new I think.

ridiculous really.