Interior and dash lightning issues

[wg100]

Had an issue crop up last night whereby neither the interior lights or the led strips in the doors are coming on. Reading lights also not working.

Then this morning, found that the radio and maxi dot were really dim despite bright sunlight outside.

Randomly, the traction control button won’t light up when pressed, although all the other buttons such as PDC and driving mode do.

 

I’ve scanned with OBD11 and there are no faults coming up related to electrics or lighting.

 

Have seen another thread which mentions the PCB behind the interior lights as a potential source of the issue. Before I pull the panel apart are there any other likely problem areas to look at which would present like this?

[fletch71]

I had this. Dealer had to replace the Bcm.

 

[wg100]

22 minutes ago, fletch71 said:

I had this. Dealer had to replace the Bcm.

 

😭

 

hope it isn’t this. There’s no faults showing. @SashaGrace considering your expertise, could the BCM be changed DIY or does it need dealer level coding?

 

 I’ve checked the PCB this morning and no obvious blown tracks.

Edited 28 February, 2022 by wg100

[wg100]

On 28/02/2022 at 12:49, fletch71 said:

I had this. Dealer had to replace the Bcm.

 

@fletch71 were any fault codes showing to your knowledge? I’m just puzzled as there’s nothing coming up when I scan the car, but fuses are intact.

[fletch71]

Nah no codes at all on Obd eleven, checked fuses etc. they reckoned they fixed it but then it wouldn’t see my keys so they had to do the bcm. Also my comfort closing had stopped working.. my car is a 69 plate.

[wg100]

2 minutes ago, fletch71 said:

Nah no codes at all on Obd eleven, checked fuses etc. they reckoned they fixed it but then it wouldn’t see my keys so they had to do the bcm. Also my comfort closing had stopped working.. my car is a 69 plate.

Thanks, mine is a 17 plate. It’s in for a service in a couple of weeks, so have added this to the list.

 

[radders567]

wg100

 

Hi mine has just started doing the exact same thing since I disconnected the battery, did you find out what the fault was?

 

Thanks.

 

Edited 18 April, 2022 by radders567

[wg100]

Was getting Component Protection error via VCDS for some reason. Took it to my local dealer who said there was a checksum error preventing the component protection error from being cleared. Needed a new BCM. Didn’t want to risk buying one myself and fitting it to find it didn’t work, so let it to them. Was about £600 including diagnosis, fitting and coding (BCM was ~£400 of that).

[radders567]

Yeah I am getting the same Component Protection errors. Looks like it will need coding with ODIS.

[wg100]

Just now, radders567 said:

Yeah I am getting the same Component Protection errors. Looks like it will need coding with ODIS.

You’ll probably need a new BCM. They couldn’t sort out the component protection issue with the original.

[radders567]

wg100 - You were right. The same check sum error was present and they could not clear the Component Protection fault. New BCM ordered, wallet now much lighter!

 

Did you ever work out what caused yours?

 

I did check the interior light circuit board just in case and all looked fine, even checked all tracks with a multimeter.

 

 

[wg100]

1 hour ago, radders567 said:

wg100 - You were right. The same check sum error was present and they could not clear the Component Protection fault. New BCM ordered, wallet now much lighter!

 

Did you ever work out what caused yours?

 

I did check the interior light circuit board just in case and all looked fine, even checked all tracks with a multimeter.

 

 

Nope. Hadn’t made any changes to anything, just got into the car one evening and it was dark. Complete mystery and an expensive one at that!

[wg100]

So annoyingly, this same issue reappeared after the new BCM was fitted.

The dealer is saying that because aftermarket changes were made to the car (tow bar, reversing camera, front parking sensors) that they can’t just replace under warranty as Skoda HQ would reject the warranty claim due to the aftermarket coding.

Dealer has suggested another replacement BCM, however this doesn’t identify the root cause of the issue. I queried them coding in the retrofitted items, but they have come back to me and said they would need to remove and install the items themselves, at whatever ridiculous cost that ends up being.

 

What I’m most perplexed about is that this is a competent protection issue. None of the retrofitted items are part of the component protection group in the car, so why would they cause a problem?

 

Is there any other way to force the removal of component protection that the dealer is unable to do (I.e. non-dealer ODIS)?

 

[PetrolDave]

4 hours ago, wg100 said:

Is there any other way to force the removal of component protection that the dealer is unable to do (I.e. non-dealer ODIS)?

An independent garage with online access to the Skoda servers can also clear Component Protection.

[wg100]

8 minutes ago, PetrolDave said:

An independent garage with online access to the Skoda servers can also clear Component Protection.

Just trying to work out if it’s a Terminal fault in the BCM. What are the chances that a new BCM would have the same fault as the old one ~6 weeks after being installed?

Problem is that it’s all guided fault finding, nobody really tries to look into the root cause.

[PetrolDave]

21 minutes ago, PetrolDave said:

An independent garage with online access to the Skoda servers can also clear Component Protection.

 

11 minutes ago, wg100 said:

Just trying to work out if it’s a Terminal fault in the BCM. What are the chances that a new BCM would have the same fault as the old one ~6 weeks after being installed?

Problem is that it’s all guided fault finding, nobody really tries to look into the root cause.

While Component Protection is active all bets are off as many functions are disabled.