Hi,

 

My car suddenly started to throw up the "AFS failure" warning on the maxidot.  I opened up the bonnet for a primary inspection, only to find the AFS control module on the RHS headlamp unit had come off!  The AFS control unit has a set of screws (three of them) which screws on to the rubber bung plug on the back of the headlamp unit, which in turn has a plastic lock that locks on to the main headlamp unit.  In my case the plastic lock is broken.  I have no clue as to how it happened. 

 

Apparently, both the LHS and RHS have the rubber bung plug with cracks on the holders (where you screw in the AFS control module).

 

Two questions:

 

1. Is it possible to purchase the rubber bung plug as a standalone?

2. Is the AFS controller faulty?

 

Please find the logs and photos.  I performed the scan twice and got the errors differently.

 

 

Address 55: Xenon Range        Labels: 5M0-907-357-V2.lbl
   Part No SW: 5M0 907 357 C    HW: 5M0 907 357 C
   Component: AFS-Steuergeraet    0148 
   Revision: 00H04000    Serial number:              
   Coding: 1507610
   Shop #: WSC 62658 626 45725
   VCID: 346CCFB157B11BBE4FF-8061

   Subsystem 1 - Part No: 7L6 941 329 B
   Component: AFS-Lst.-Modul l    0005 
   Coding: 00000023

   Subsystem 2 - Part No: 7L6 941 329 B
   Component: AFS-Lst.-Modul r    0004 
   Coding: 00000023

1 Fault Found:
02234 - Right Headlight Power Output Stage (J668)
            004 - No Signal/Communication - Intermittent
             Freeze Frame:
                    Fault Status: 00100100
                    Fault Priority: 6
                    Fault Frequency: 14
                    Reset counter: 108
                    Mileage: 29858 km
                    Time Indication: 0
                    Date: 2021.14.14
                    Time: 14:20:05

             Freeze Frame:
                    Voltage: 12.21 V
                    Speed: 0.0 km/h
                        ABS 1

 

Address 55: Xenon Range        Labels: 5M0-907-357-V2.lbl
   Part No SW: 5M0 907 357 C    HW: 5M0 907 357 C
   Component: AFS-Steuergeraet    0148 
   Revision: 00H04000    Serial number:              
   Coding: 1507610
   Shop #: WSC 62658 626 45725
   VCID: 346D5D7557E514BE4FF-8061

   Subsystem 1 - Part No: 7L6 941 329 B
   Component: AFS-Lst.-Modul l    0005 
   Coding: 00000023

   Subsystem 2 - Part No: 7L6 941 329 B
   Component: AFS-Lst.-Modul r    0004 
   Coding: 00000023

1 Fault Found:
02234 - Right Headlight Power Output Stage (J668)
            001 - Upper Limit Exceeded - MIL ON
             Freeze Frame:
                    Fault Status: 11100001
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 84
                    Mileage: 30200 km
                    Time Indication: 0
                    Date: 2021.14.22
                    Time: 12:15:05

             Freeze Frame:
                    Voltage: 12.64 V
                    Speed: 0.0 km/h
                        ABS 1

 

The first photo shows the error, the second shows the working AFS unit with 'cracks' on the holder, while the third photo shows the broken piece.

I had a problem similar to this in my Passat with AFS. It turned out the wire from the ballast to the bulb had become ever so slightly disconnected. I had to remove the whole headlight unit to check this and fix it. I would do this and check all connections.

 

As for the plastic lock, I'm not sure. I would try a breakers or eBay?

That looks unusual.

 

The stress fractures on the screw housings look like the screws have been overtightened.

 

The only way the plastic clip / lock could have broken like that is either a manufacturing defect or the bloke who overtightened the screws also managed to break the clip.

 

It looks to me as though someone has been playing around under your bonnet!

 

It is likely that when the AFS controller fell off after the clip failed it has pulled or loosened one of the wire connections triggering the warning in Maxidot.

I did break one and added screw to fix. The afs don't know but main beam you can get from dealer the plastic xenon ballast holder as the clips break easily

Thanks everyone for the responses!  Is there any part number for the plastic cover  - the one onto which we screw on the AFS control module?

Take the headlight out to see

Took the headlamp unit outside.  The Skoda technician now tells me its due to the improper seating of the AFS controller on the 'back cover' that's causing this error.  Somehow, I'd noticed both the RHS and LHS have their AFS controller screws replaced with some counterfeit.  The Skoda technician was however, not confident to remove the controller from the cover to check further for any contact issues.

 

The funny part is that the AFS initialization occurs each time you start the car.  here's the video:  http://youtu.be/rUdgUAc2tR8

 

Is it possible to obtain the back cover as a stand alone?

 

I'm also suspecting the oil change done by the dealer.  I was expecting to see clear oil and at the maximum level.  however, here, its quite black in color and only at about 50%.

 

Any thoughts?

How many miles since the oil change?

 

What fuel does your Octavia run on?

 

Diesel engines can turn fresh engine oil black in only a few miles.

 

What was the engine temperature when you checked the level?

 

Skoda recommend that the engine is warm (not hot) before checking the level.

 

I prefer to check mine when it is cold as all the oil will have worked its way back down into the sump by this point.

I did check with the engine cold (before start in the morning and after its reached the optimal temperature).  The oil level is at about 50% always and that too black in color.  The oil was replaced after the 30K service and has done about 250Kms so far.

Not normal on the oil.

 maybe after 2000km or so it will start to go black.

Should change garage:)

 

Ok so I have seen your video and guess what, mine also does this sometimes when starting engine.

The BULB, yes BULB as the AFS is for the cornering, is flickering on start up and only when you start engine.

I wouldn´t be concerned

Edited 17 June, 201411 yr by alberg

the afs xenon module (brains) is actually located behind the climatronic controls.

the controllers, known as power modules, on the back of the headlights control the actuators based on the instructions it receives.

 

 

 

Edited 18 June, 201411 yr by JR RS

 

Not normal on the oil.

 maybe after 2000km or so it will start to go black.

Should change garage:)

 

Ok so I have seen your video and guess what, mine also does this sometimes when starting engine.

The BULB, yes BULB as the AFS is for the cornering, is flickering on start up and only when you start engine.

I wouldn´t be concerned

 

I'm not concerned with the bulb, the purpose of the video was to show that the AFS initialization take place normally, despite the cluster displaying the AFS error - as shown in the pics.

 

the afs xenon module (brains) is actually located behind the climatronic controls.

the controllers, known as power modules, on the back of the headlights control the actuators based on the instructions it receives.

 

 

 

 

I'm referring to the power module behind the headlamp unit, exactly behind the high-beam.  This module is screwed on to a plastic cover which serves as a cover to the provision through which one can change the high beam halogen bulbs.  This cover is fastened to the headlamp assembly by means of a plastic clip, which is broken in my case.  The screw pillars are also cracked.  The power module is simply hanging on the wires that's coming from the headlamp assembly.  I guess there could be some contact issue causing the error.

 

Thanks for the extra steps for the pics!   Would you have any suggestions for this specific case?

Edited 20 June, 201411 yr by nitinbose

This is EXACTLY what has happened on my FL AFS headlight (see other post) the plastic tab on the top has snapped, as have the lugs, in the same way, look like over tightened.

My problem is, the module got wet and now I have no AFS only a bulb warning light. The xenons work fine though. two dealers so far have been unable to clear the error code, even with the new part fitted?

I've worked out a way to hold it in place with a cable tie now... Otherwise I need a whole new headlight as my physical plastic hook has snapped on headlight too..

I'm a product designer by trade, looking at the thickness if material, and the job these tabs need to do.. Design is not fit for purpose!

Now all I need to do is clear codes..

Like JR RS said the ECU AFS controller is original located behind the climate control. Without this the auto leveling and binding system will not work. I was refering to the part that you are concerned. If the system is working fine and no error shows on dash you just go on with your life, if concerned about Vagcom error I would suggest for someone else to try and erase error/log.

Edited 21 June, 201411 yr by alberg

This is EXACTLY what has happened on my FL AFS headlight (see other post) the plastic tab on the top has snapped, as have the lugs, in the same way, look like over tightened.

My problem is, the module got wet and now I have no AFS only a bulb warning light. The xenons work fine though. two dealers so far have been unable to clear the error code, even with the new part fitted?

I've worked out a way to hold it in place with a cable tie now... Otherwise I need a whole new headlight as my physical plastic hook has snapped on headlight too..

I'm a product designer by trade, looking at the thickness if material, and the job these tabs need to do.. Design is not fit for purpose!

Now all I need to do is clear codes..

 

This is exactly my issue as well, except the AFS controller (located behind the climate controls) is fine and the two AFS power modules (located behind the headlamps) seem fine. I guess I'm getting the error because the power module seems not seating properly, hence the cornering function is not working.  Tried clearing the error but reappears.  You might want to check with some scrap or total loss dealers who should be having these parts.

 

Like JR RS said the ECU AFS controller is original located behind the climate control. Without this the auto leveling and binding system will not work. I was refering to the part that you are concerned. If the system is working fine and no error shows on dash you just go on with your life, if concerned about Vagcom error I would suggest for someone else to try and erase error/log.

 I do have this controller and its perfectly fine.  I have to get the plastic tab from some scrap dealer and fix the power module and see if everything works fine.  I hope no water has entered the module.

 

 

btn., how are the Skoda service center in your respective coutries?  Its worse than pathetic in India.  They simply charge you for services they haven't done, top up the oil instead of refilling, steal parts etc.  Here are some links to give you an idea: http://www.team-bhp.com/search.php?cx=partner-pub-8422315737402856%3Azcmboq-gw8i&cof=FORID%3A9&ie=ISO-8859-1&q=skoda+service&sa=

Edited 26 June, 201411 yr by nitinbose

I solved mine in the end. Found a Superb headlight with broken brackets on eBay. I spotted it still had the AFS module attached. Bought for £40.

Took the module off, fixed to my headlight and it made the light point in the air. Took it to auto electrical who using VDS reset the coding to be Octavia, works perfect.. All fixed, no error messages and my headlights steer round corners.

Going to look at a way of better securing both modules so they never fall off!

Mike

Hi Everyone!

 

I have to replace the AFS controller module: 7L6 941 329 B, also called the power module.  When replacing, would it suffice replacing just one module (faulty) or its better to replace both the modules (LHS and RHS), as some tell me there could be some firmware revisions with bugs corrections, so having one power module as a previous year model and the newer one from the current year would not be perfect for the AFS operation.

 

Please suggest.

 

regards,

 

Nitin

Hi Folks

 

I have a 2102 Mk11 Octavia Scout - Sydney Australia - I have exactly the same problem as the initial post - and broken tab on bracket as shown in photos. I was able to purchase a new bracket from Skoda. Now I'm wondering whether the control unit 7L6 941 329B should just "unplug" easily from the assembled unit - I'm a bit nervous about breaking or loosening any of the wires into the unit. Suggestions?

On 18/06/2014 at 06:39, JR RS said:

the afs xenon module (brains) is actually located behind the climatronic controls.

the controllers, known as power modules, on the back of the headlights control the actuators based on the instructions it receives.

 

http://i38.photobucket.com/albums/e122/jrappai/Da%20Car/vRS/BT%20Install/IMG_0504-1.jpg

 

http://www.carsystems.pl/img/products/41/1/4_max.jpg
 

Hei i am an total newbie. So be Nice to me. Is this the location of the left afs control unite?.  Cant see clear in the pictuee but is this inside the car at under the navigasjon screan or is this some where is side the engine Bay? 

@tibiking - on a FL MK2 Octavia, there are three control modules for AFS:

- The AFS master is behind the climate control panel inside the car

- Each headlight also has an AFS slave (black thing) and xenon ballast (silver thing) attached to it

I got the following code i think its the master. What do you think? 

 

55 Headlight Regulation

    System description: AFS-ECU
    Software number: 7P6907357A
    Software version: 0080
    Hardware number: 7P6907357A
    Hardware version: H07
    Serial number: --------------
    ODX name: EV_HeadlRegulVWAFSMQB
    ODX version: 001120
    Long coding: 03CA02003F000000

    Subsystems: 
        System description: LeiMo links  
        Software version: 0009
        Hardware version: H06
        Long coding: 3E0000

        System description: LeiMo rechts 
        Software version: 0009
        Hardware version: H06
        Long coding: 3E0000

    Trouble codes: 
        C103415 - Left front level control system sensor Open circuit/short circuit to B+

Seems more likely it would be the front level sensor which is attached to the suspension...

When i look up the hardware nummber 

7P6907357A

 

I get the carsystems.eu
Xenon Range / AFS LWR - Headlights Unit - Dynamic AFS1 

 

Do you maybe have link the the sensor attsched in the wheel base rhe one you are refering 2? 

I used 1K0 941 274 C on a MY12 Octavia.

 

Given it's a easy to see part, I'd suggest checking it for damage and the part number before buying a replacement.