I have a warning on the dash which says No Bend Lighting (AFS) Function and a bulb warning (although all the bulbs are good. The car has Xenons and sensors on the front and rear axle. The headlights usually do a little up/down and left/right dance when you turn them on but this has now stopped working, the headlights are also in an extreme down position, so can't be driven at night.

 

I have read the codes using both VCDS and a Snap-on scanner and the produce the same codes:

 

00496  front  sensor for vehicle levelling open circuit/short with power

00497, rear sensor for vehicle levelling open circuit/short with power 

01537 vehicle level sensor supply voltage not a plausible signal

 

I've checked the battery voltage and the fuse no5 which also powers the PDC (which is working).

 

I can get underneath and check the wiring to the sensors tomorrow (it seems unlikely they have both failed simultaneously with the module) but they could have the power wired in series, it's also possible the module if faulty.

 

Does anyone have a wiring diagram for this or know where the module is?

 

Any help appreciated, someone must have had this problem before?

I had this on my car, it turned out the rear speed.sensor needed replacing! Odd I know, why should that effect my lights? However when I changed it all was good and worked well! You will probably find the headlight washers dont work either!!

Hipe this helps!

I've had a speed sensor fail before and got an ABS warning light, don't have that this time, but I suppose anything is possible. I'll go and check the headlight washers later today.

7 hours ago, CzechPassat said:

I've had a speed sensor fail before and got an ABS warning light, don't have that this time, but I suppose anything is possible. I'll go and check the headlight washers later today.

No sign of speed sensor failure, headlamp washers all working. Scan with VCDS shows no speed sensor issues.

OK I got into this a bit further today.

 

Started by clearing all 3 codes, the only one that came back without cycling was 

 

01537 vehicle level sensor supply voltage not a plausible signal

 

The other codes for the sensors themselves only come back when you cycle the ignition and the system interrogates the sensors before doing the little headlight up/down left/right dance. So my conclusion from this is that there's either an issue with the module or (I'm hoping) the power feed to the module. I've got as far as finding where the module is but I need a wiring diagram of the power feed to it, and where the feed comes from.

 

So can anyone help me out with a wiring diagram?

I gave up on trying to sort this myself so let the local VAG independent have a go at it. Had to wait 2 weeks to get it booked in, then another week while they waited for parts delivery from Germany.

The headlamp control unit had failed, all the other components were fine. So with the new module from TPS, Diagnostic, coding and fitting the bill came to £580.

Sounds like a costly repair, certainly by my standards because I do everything myself, but I suppose it wasn't that bad!

Considering the cost of new headlights these days I would say reasonable however like you it would make me cough!