Hello everyone.

Soon I will be exchanging BCM in Skoda Yeti. Does anyone know what value is byte 18?

The new BCM will probably be from another VAG vehicle, so the value will be 18 will be different, which will cause problems with the lighting.

Thank you in advance for your help.

Whereabouts are u? I can help reading the eeprom and save all the lights configuration (byte 18) and then upload it into the new one.

The OP is in Hampshire.

 

Looking at the 3 Yeti's I've scanned, byte 18 is 00 so there is no 'correct' byte 18 value. Instead, the best plan is to extract the existing light config and copy it to the new BCM with VCP or ODIS-e.

 

Given the current covid situation, if you can't find someone local you could always post both?

 

Out of curiosity, why are you changing the BCM?

29 minutes ago, claudiu2s said:

Whereabouts are u? I can help reading the eeprom and save all the lights configuration (byte 18) and then upload it into the new one.

I am from Andover - quite far from you. Unfortunately this method will not work because I changed the setting in byte 18. I wanted the daylight light to be off - the system shows that the bulb is burned but I checked both and they are good and  still it does not lights.
After changing in byte 18 the indicator light is no longer on - but of course there are still no DRL lights

17 minutes ago, langers2k said:

 

Out of curiosity, why are you changing the BCM?

At first it was an occasional error - the lights were shining and there was an error "Too high voltage" and "broken circuit of the right daytime bulb". Then there was a permament  error and then the lights stopped shining.

 

2 minutes ago, Wlad69 said:

At first it was an occasional error - the lights were shining and there was an error "Too high voltage" and "broken circuit of the right daytime bulb". Then there was a permament  error and then the lights stopped shining.

 

I temporarily entered the code for Octavia with no DRL lights.

The ‘00’ on Byte 18 as a mask, the true code isn’t shown. 

51 minutes ago, Gizmo said:

The ‘00’ on Byte 18 as a mask, the true code isn’t shown. 

Now I know.  But before that, I was sure that, having a coding backup, I will return to the previous value without any problems.

I can probably take a good guess at a stock Yeti light config (without an original BCM) if needed. I've got a couple of Yeti light configs from where I've worked on them previously.

 

Obviously I'd much rather have access to the car to check everything but that seems unlikely given our locations. I might have a spare BCM that's suitable I can pre-configure and post out?

 

If you're interested, drop me a PM and I'll see what we can sort out

1 hour ago, langers2k said:

I can probably take a good guess at a stock Yeti light config (without an original BCM) if needed. I've got a couple of Yeti light configs from where I've worked on them previously.

 

Obviously I'd much rather have access to the car to check everything but that seems unlikely given our locations. I might have a spare BCM that's suitable I can pre-configure and post out?

 

If you're interested, drop me a PM and I'll see what we can sort out

Thank you. I will contact you soon if I don't find another option.

Okay, I found a byte 18 calculator on the Internet and now that everything was working as it should. Thank you for your time.