Seat Ibiza 6J, 2.0 TDI FR, Auto Lights Retrofit (BCM 88D)

[MIH11MI6]

Hi All,

I have a 2010 (VSSZZZ6JZARxxxxxx) 2.0tdi FR Seat Ibiza 6J that i'm looking to implement auto lights into.

I previously had a 1.2tdi ecomotive 6J that had auto lights, and before I scrapped the car I took the full wiring loom out. this means I have the auto lights switch, BCM 88D (6R0937088D), and a full set of wiring to work off, the only thing missing is the relays. I can upload any pictures of the wiring and relay holders I have on request.

The aim is to have:

Auto Lights
Coming Home/Leaving Home

I already have a windscreen mounted Rain Sensor installed and working (Auto Wipers and Auto Dimming rear view mirror working)

I'm certain that an 88D BCM conversion will be required due to 87D (current BCM) not supporting auto lights/ CH/LH.

My next step is to cross reference what wiring setup is currently in the car, and what I have in the 88D (auto lights) wiring loom.

Any Expertise that people can bring to the table would be really appreciated (Ciclo maybe? )

I noticed a post from a while ago

https://www.uk-polos.net/viewtopic.php? ... e106c3ab89

of someone looking to complete the same conversion, the difference being I have the twin reflector headlights, instead of the bixenons.

I can post VCDS auto scan if required aswell

Thanks!

[iichel]

I think it's probably better to look for a BCM max (ending in 089/090). The best result is with the latest 7E0 937 090C bcm max.
The fititng of an 088D bcm is certainly possible but the external gateway also needs to be mounted. That's not very practical.

[MIH11MI6]

Very interesting!

That makes a lot of sense though. And if I go for an 89/90 bcm max I have a good chance of implementing the daytime running lights also

That's great advice thanks!

So once I get hold of a bcm max, next best bet is to get that working before embarking on the auto lights correct?

I've read Ciclos polo 6R auto lights retrofit, but get stuck when it comes to the changing of the plug from T17 to T10 plug, as obviously 6J auto light switch is T17 plug, it's possible to complete with that plug setup?

Thanks

[iichel]

Yes you are completely on the right track. In general, first get the basics right, then do retrofits.
So the task now would be to find the correct BCM, adapt the wiring (2 wires to IC for 7E0, wires to the lights/fuse box, wires to the light switch).

So you maybe noticed 'in general'.
In this case it makes sense to combine the things you're doing.
I'd recommend to combine the retrofit of the BCM max (and according wiring to and from the light switch) with the auto lights.
If I remember correctly, the Ibiza does indeed have a 17-pin auto light switch, is this correct? So it would make sense to first look at what is needed

Since I don't have the wiring diagrams for your Seat Ibiza, perhaps it's better to find these first on i.e. ERWIN or trace wires in your old loom

[MIH11MI6]

Yes you are completely on the right track. In general, first get the basics right, then do retrofits.
So the task now would be to find the correct BCM, adapt the wiring (2 wires to IC for 7E0, wires to the lights/fuse box, wires to the light switch).

So you maybe noticed 'in general'.
In this case it makes sense to combine the things you're doing.
I'd recommend to combine the retrofit of the BCM max (and according wiring to and from the light switch) with the auto lights.
If I remember correctly, the Ibiza does indeed have a 17-pin auto light switch, is this correct? So it would make sense to first look at what is needed

Since I don't have the wiring diagrams for your Seat Ibiza, perhaps it's better to find these first on i.e. ERWIN or trace wires in your old loom

I agree with In general comment, best to hit two birds with one stone in this case, as i'll be doubling back on work i've already done.

so the 7E0 BCM max, which would be the correct part number to use? I'll get it ordered today in that case.

You are correct, Ibiza does have 17 pin plug, see image below:

T17: https://i.imgur.com/GetSb3r.jpg
T5 (Dimmer): https://i.imgur.com/yqnQ4Oq.jpg

I do have ELSAWin, only issue is I have a bug in my install where I don't have Seat Wiring diagrams, I can make a trace of my current loom not a problem at all, dashboard is out of the car so all a lot easier.

Thanks so much for your help

[iichel]

I think you should be OK with a 7E0 937 090C. I'm not 100% sure a D or E bcm would work, I read somewhere that you can't learn the remotes anymore with VCDS.
I'd wait for ciclo to comment on that. He knows.

Other than that, just wanna check if you're comfortable with adding wires to the BCM, removing wires from fuse box/light switch and leading wires to headlights/foglights.
Even though I think you don't have to in your case, all work should be limited to the BCM/fuse box area, perhaps one or two wires to licence plate lights and reverse light.

[MIH11MI6]

I think you should be OK with a 7E0 937 090C. I'm not 100% sure a D or E bcm would work, I read somewhere that you can't learn the remotes anymore with VCDS.
I'd wait for ciclo to comment on that. He knows.

Other than that, just wanna check if you're comfortable with adding wires to the BCM, removing wires from fuse box/light switch and leading wires to headlights/foglights.
Even though I think you don't have to in your case, all work should be limited to the BCM/fuse box area, perhaps one or two wires to licence plate lights and reverse light.

okay cool, Mines an 87D, so agree, i'll wait for Ciclo to respond regarding the part number and i'll get it ordered

yes I feel totally comfortable pinning out things, I've already had to do quite a lot of work to get the rain sensor working, sunroof loom retrofit working, and i've also had to make a haldex wiring loom, and secondary fuel level sensor and pin that in for All Wheel Drive conversion.

very excited to have this retrofit complete, going from having auto lights to losing them was the biggest loss of my engine swap, so I really appreciate the support

[iichel]

If you're looking to do more things to your Seat Ibiza, perhaps it is worthwhile to buy one hour or ERWIN and print all the info to PDF
https://erwin.seat.com/erwin/showHome.do

That way you'll always have the correct schemes and repair information. It is very similar to the Polo 6R in many ways, but there are distinct differences like the T17 auto light switch.

[MIH11MI6]

If you're looking to do more things to your Seat Ibiza, perhaps it is worthwhile to buy one hour or ERWIN and print all the info to PDF
https://erwin.seat.com/erwin/showHome.do

That way you'll always have the correct schemes and repair information. It is very similar to the Polo 6R in many ways, but there are distinct differences like the T17 auto light switch.

I'll certainly have a look into it, trying to suss out the current flow diagrams from polo to ibiza can sometimes be very difficult so this will certainly help.

I'll wait for Ciclo to respond on the BCM topic and we shall go from there, I will endeavour to document this full process for 6J Ibiza as I think it may be useful for quite a few people

Thanks

[MIH11MI6]

If you're looking to do more things to your Seat Ibiza, perhaps it is worthwhile to buy one hour or ERWIN and print all the info to PDF
https://erwin.seat.com/erwin/showHome.do

That way you'll always have the correct schemes and repair information. It is very similar to the Polo 6R in many ways, but there are distinct differences like the T17 auto light switch.

Great advice iichel, purchased an hour of ErWin and got all the current flow diagrams for my vehicle.

I have received the spec and production date: https://i.imgur.com/w6KcW1a.jpg

Light Switch Pinout: https://i.imgur.com/rX3525O.jpg

and the pinouts for the lights themselves: https://i.imgur.com/j06zEZl.jpg

hopefully these diagrams will help point in the right direction as to what's required. I can also share the BCM pinout for my bcm aswell. let me know anything needed and i'll grab it for you

Cheers

[iichel]

Good news. Remember, there are more or less two ways the lights are operated in the Polo 6R, with many exceptions.

BCM Mid/High - 087/086/085:
Light switch connects directly to the lights or via relays:
- Dipped beam via dipped beam relay
- High beam via stalks
- Fog lights via light switch and SB54 or cornering lights via BCM
- DRL via light switch and SB56
- Rear fog light via light switch and fuse box
- Reverse light via reverse gear switch
- Licence plate lights via BCM or light switch

BCM Max - 090/089/088:
- Dipped beam via BCM
- High beam via stalks or BCM (7E0 only, as option for HBA)
- Fog lights via BCM as cornering lights or SB54 with OEM bi-xenon.
- DRL via BCM
- Rear fog light via BCM
- Reverse light via BCM
- Licence plate lights via BCM

So, study the wirings very precisely. Usually the BCM Max schemes will be presented by the 7L6 (start/stop) diagrams.
It will happen that a light can be operated in multiple ways, like the DRL (via light switch/SB54, via dipped beam, via DRL module, via BCM to separate DRL lights).
Compare the wirings as described by the PDF to your own car (fuse box, light switch connections) to deduce how your wires are currently running.
Only then you can successfully determine the modifications you need to make for the BCM max.

[MIH11MI6]

Good news. Remember, there are more or less two ways the lights are operated in the Polo 6R, with many exceptions.

BCM Mid/High - 087/086/085:
Light switch connects directly to the lights or via relays:
- Dipped beam via dipped beam relay
- High beam via stalks
- Fog lights via light switch and SB54 or cornering lights via BCM
- DRL via light switch and SB56
- Rear fog light via light switch and fuse box
- Reverse light via reverse gear switch
- Licence plate lights via BCM or light switch

BCM Max - 090/089/088:
- Dipped beam via BCM
- High beam via stalks or BCM (7E0 only, as option for HBA)
- Fog lights via BCM as cornering lights or SB54 with OEM bi-xenon.
- DRL via BCM
- Rear fog light via BCM
- Reverse light via BCM
- Licence plate lights via BCM

So, study the wirings very precisely. Usually the BCM Max schemes will be presented by the 7L6 (start/stop) diagrams.
It will happen that a light can be operated in multiple ways, like the DRL (via light switch/SB54, via dipped beam, via DRL module, via BCM to separate DRL lights).
Compare the wirings as described by the PDF to your own car (fuse box, light switch connections) to deduce how your wires are currently running.
Only then you can successfully determine the modifications you need to make for the BCM max.

That makes a lot of sense, thank you.

I have what I believe is the 7L6 switch output for BCM MAX: https://i.imgur.com/6Fn2v5X.jpg

There are a lot of differences between the two, but that is good, as having DRL control in BCM max will be nice aswell, may also lead me to do HBA, as long as 7E0 bcm is compatible.

As well as what is currently in the vehicle: https://i.imgur.com/rX3525O.jpg

I will first cross reference the diagram to what is currently in the vehicle to ensure the diagram is consistent, then I will begin determining the differences between what is needed for BCM max.

This is the furthest I've ever gotten with this so its really great!

[iichel]

A good idea is to ctrl-F for "T17" until you can identify all wires on your light switch. The diagram you show does not show all functions yet

And comparing BCM max to your current setup is sometimes very easy, like here:



I would recommend for at least a BCM 7E0 937 090B since it has some extra features like direct TPMS.

[MIH11MI6]

A good idea is to ctrl-F for "T17" until you can identify all wires on your light switch. The diagram you show does not show all functions yet

And comparing BCM max to your current setup is sometimes very easy, like here:



I would recommend for at least a BCM 7E0 937 090B since it has some extra features like direct TPMS.

Okay ill do a find on the PDFs and make a note of all the T17 points and try and build a table up of the two, current and new.

Only annoying thing about the 6J current flow diagrams is on both it shows only bixenon configuration 7L6, not dual headlight. Assuming they would be different?



I have found a bcm on ebay for 7E0 937 090B for a fair price. If it's compatible I will purchase asap to get the ball rolling, also found a 7H0 937 090B which is cheaper, what are the differences between 7E0 and 7H0?

Thanks

[iichel]

Only annoying thing about the 6J current flow diagrams is on both it shows only bixenon configuration 7L6, not dual headlight. Assuming they would be different?

Well, yes and no. I think you can take the Polo 6R schemes for your ElsaWin for the headlights since it has the same BCM Max and T10 connector for the headlight.
You can then use the fuse box layout from your Ibiza schemes for the feed to the BCM for DRL, low and high beam.
In the Polo 6R they are SB39 and SB59 for low/high beam and SB57 for the DRL/fog lights.

The low beam and high beam on bi-xenon headlights are operated from the same BCM/stalk outputs as the H4/H7 headlights.
The high beam outputs on the BCM however are not listed in the schemes for the Polo 6R but are from a T6.

The high beams now come from T41/39 (stalks) and via SB34 (sometimes also and SB36) to to the headlights.
If you want to operate the high beams via BCM, that's possible. But then you need to wire the high beams via T73a/1 and T73b/1.
Otherwise you can either leave it (if your current setup uses SB34 AND SB36) or also use SB36, so that each high beam has its own fuse.

Have a look at this schematic that ciclo made for the new 7E0 stalks (return-to-center with BCM control for high beam).

Autolight 7E0.png (1.69 MiB) Viewed 3486 times