VW T5 GP BCM Replacement 7H0937087 D => 089 F, Xenon Upgrade

Hello!

I want to retrofit Xenon headlights to my T5 GP Multivan Startline, manufactured in 10/2010. My T5 does not have the "auto-light" feature, but it does have an MFL (multifunction leather steering wheel), RNS510 navigation system, FSE-Premium phone system, and cornering lights. It does not have any parking sensors or electric doors, and it does not have Lane Assist. It has a 7H0 937 087 D BCM installed, but this is not suitable for operating Xenon headlights (although the coding option for that is available).

I've studied wiring diagrams extensively, and since there's a version without the automatic headlight function but with xenon headlights, I see similarities in the wiring that make my conversion possible.

After ALWR and SWR have been resolved, the only remaining obstacle is now the BCM.

Based on what I've found so far, I need a 089 F with software version 0254.

Unfortunately, I've discovered that there are so many different versions of the BCM (Body Control Module), so I'm looking for someone who really knows this area well. There was a BCM version for vehicles up to May 24, 2012, then one up to November 4, 2012, and now there's a current version. This type of conversion has been done several times before, but always only by VW workshops, which of course don't reveal any details. Also, everyone initially had to deal with various functional problems, especially with the interior lighting. In none of the conversions did the interior lighting work immediately. It was not disclosed whether the information needed to be re-entered or simply re-coded.

Okay, let's start with the first problem: Which BCM (Battery Charging Module) should I buy, and where's the best place to get it?
Can I use VCDS to activate a brand new BCM (Body Control Module)? What functions must it have? Can it have more features than I need, and if so, can I simply disable the ones I don't need in the installation list?
In my studies of various model years and BCMs (Body Control Modules), I was unable to find any connection differences except for one instance. In that single case, I had a wiring diagram for a BCM that differed in 38 points regarding the pin assignments. That's why I'm afraid of making a mistake when making the change.

Can the 087 BCM be "rebuilt" or "refurbished"? At least, that's what someone claimed once.

With the hope of your help,

Peter.

Quote:

I am looking for someone who really knows a lot about this subject.

What is t5-board.de?

They were very eager to get their hands on the Xenons as soon as they were released, and they managed to do so.

m;

Hello Martin!

Thank you for the suggestion, but I'm already active in that area.

Sure, some people have already converted their vehicles there, but 99% of those who did so had T5 GP or Highline variants equipped with the automatic headlight feature, which significantly simplified the process of changing the BCM (Body Control Module). It essentially only required a one-to-one replacement of the BCM with a compatible software version, connecting two lines to the TFLs, retrofitting the ALWR (and SWR, if not already present), and then coding it – and that's it.

Unfortunately, that's not so easy with a T5 GP model without automatic headlights. There's now an option to order the T5-GP without the automatic headlights but with xenon bulbs, so there must be a compatible BCM (Body Control Module) available, but which one?

Unfortunately, the wiring for a T5 with automatic headlights and a T5 without automatic headlights differs significantly, which makes the conversion quite difficult.

That's why the confusion.

Some people have used a module to dim the LEDs, but this module apparently doesn't work in my case.

Regards,

Peter.

Too bad.

The two T5 scans I have also both have a "089 F" marking.

m;

Hello!

Okay, it's an 089 F, but there's also a distinction based on equipment. There's an 089 F offered for vehicles with "bi-xenon headlights," and an 089 F for vehicles with "halogen headlights." Then there's also an 089 F for vehicles with and without a rear fog light, and with or without lane assist, but they all have the same spare part number. Only the abbreviation behind it is listed in the AKTE system, but this abbreviation is not found on the BCM itself.

Or is it to be understood that the "089 F" designation can be used for any vehicle with these features, regardless of the specific configuration? I don't quite understand that.

The problem lies in the pin assignments of the two connectors on the BCM (Body Control Module). These assignments can be fundamentally different, depending on the vehicle's equipment. Therefore, I highly doubt that a single "089 F" BCM could be universally applicable. For example, a T5 Transporter with automatic headlights has a completely different pin assignment on the two connectors compared to a T5 Transporter without automatic headlights. Both variants exist, and they are now available with either xenon or halogen headlights. The complete confusion

Regards,

Peter.

Hi Peter,

Have you found anything out about this yet?

The xenon headlights of the T5GP look very, very similar to those of the Touran and Sharan.

Only the cars have an H7 bulb in addition to the DE lens, which serves as a turning light.
Beautiful from above - perfect, just like in the 2007 3C.

The T5 also has an H7 bulb... but it's designated for high beam (despite having bi-xenon), and the low beam is achieved using the fog light (which is poor, flat, and low).

If the T5-H7 light bulb fits, you could wire them as turn signals and possibly discard the fog lights. Then, one could even have "all-weather lights" like the A6 .

The question is really about the image quality... and I can't test drive another T5 right now .

m;

Hi Martin!

Unfortunately, I don't have any information yet about the display quality when it's installed, as I haven't found a solution for the BCM replacement yet.

"Those who have successfully converted their headlights report a uniform and wide illumination of the road with the xenon bulbs. The H7 high beam bulbs in the T5 xenon headlights are linked to the shutter. They primarily serve as a visible high beam flash. Unless it's a very dark night, you wouldn't otherwise be able to see the high beam flash. Using them as a turning light is unlikely, as the H7 bulbs are located in a traditional high beam reflector. This focuses the light primarily forward, which would cause glare for oncoming traffic when turning." The desired direction of turning cannot be illuminated in this way.

Regards,

Peter.

Quote:

They primarily serve as a recognizable high-beam indicator. Except in the darkest of nights, you would otherwise not be able to see the high beams.

And how are *all* the others handling Bi-Xenon headlights?
Just like in the 3BG, it's wired in such a dumb way that even during the day, not only do the bulbs ignite, but the H7 headlights also turn on.

But I think my (pure Xenon) high beam headlights are

Quote:

classic high beam reflector

I couldn't detect that same (inherent) difference from the fixed turn indicators in the Sharan. That's strange...

For the high beams, they don't provide enough brightness.
http://www.t5-board.de/board/threads/59711-Original-T5-2-Xenon-mit-LED-Tagfahrleuchten-Umr%C3%BCstung?p=757700&viewfull=1#post757700


Hmm, I really need to get my hands on one of those.

m;

dieselmartin wrote:

And how are *all* the others handling Bi-Xenon headlights? Just like in the 3BG, it's designed in such a dumb way that even during the day, not only do the bulbs turn on, but also the H7s.

According to the wiring diagram, the H7 lamp is only connected to the shutter, and the burner should ideally remain dark.

dieselmartin wrote:

I couldn't detect that same (inherent) difference from the fixed turn indicators in the Sharan. That's strange... For the high beams, they don't provide enough brightness.

Hmm, I really need to get my hands on one of those.

m;http://www.t5-board.de/board/threads/59711-Original-T5-2-Xenon-mit-LED-Tagfahrleuchten-Umr%C3%BCstung?p=757700&viewfull=1#post757700

You might be right; the reflector of the H7 bulb is narrow and positioned laterally towards the front, which should normally result in lateral illumination.

But right now, I'm still struggling with controlling the LED daytime running lights. The dimming function has not yet been successfully activated.

Regards,

Peter.

Have you installed the software yet?

Hi Martin!

No, because I only do that after the dry test has been passed or a final decision has been made regarding BCM and occupancy.

I can't just leave the car sitting around in a half-finished state; the conversion has to work perfectly the first time.

Just now, I read on the T5 forum that on a T5 GP Highline, apparently without the "Auto-Light" function, the conversion to Xenon headlights was successful by replacing the Body Control Module (BCM) with the part number 7H0 937 087F (mine is an H).

Is it possible that my 087 H BCM supports Xenon headlights if it's properly coded? The latest firmware, version 0254, was installed by the dealer, so it should be up-to-date. Or is this xenon support function only available from the 2012 model year onwards, and specifically for BCMs from that model series and production period, due to its design?

Unfortunately, the tear-wipe function has been lost with the BCM update from SW 0221 to SW 0254. The channel is non-functional in the adaptation settings. Officially, this function was never available on the T5-GP, but I found it useful. Why couldn't there have been a function added?

Who is an expert in the field of BCM?

Regards,

Peter.

Quote:

Who is a specialist in the field of BCM?

Unfortunately, I can't.

I haven't even managed to get past a test drive so far - and that was already a year ago .

m;

Thank you, Martin!

Does anyone else in this forum specialize in BCMs?

KUFATEC seems to be quite knowledgeable in that area, so I sent them an email. Let's see what they have to say.

I would be grateful for any helpful advice, whether it's just putting me in touch with someone who knows more about the subject, anything would be appreciated.

Regards,

Peter.

For everyone reading this, here's a brief overview of the BCMs (Business Continuity Managers) of the T5 GP:

BCM for T5.2:

7H-C-000 001 >>
7H0 937 087 H, 434 MHz, replacement for 7H0 937 086 H (part number 7L3).
7H0 937 087 H Z 0A (PR 7Y0)
7H0 937 087 H Z 01 (PR 7Y1)

7H0 937 089 F 434 MHz (PR 8K3, 8K8+7L3)
7H0 937 089 F Z 2K 434 MHz (PR 7Y0+8BB, 8BF, 8EK, 8EL+8TA)
7H0 937 089 F Z 2L 434 MHz (PR 7Y0+8BB, 8BF, 8EK, 8EL+8TC, 8TD)
7H0 937 089 F Z 2P 434 MHz (PR 7Y0+8EC, 8ED, 8EM, 8EN+8TA)
7H0 937 089 F Z 2Q 434 MHz (PR 7Y0+8EC, 8ED, 8EM, 8EN+8TC, 8TD)
7H0 937 089 F Z 2M 434 MHz (PR 7Y1+8BB, 8BF, 8EK, 8EL+8TA)
7H0 937 089 F Z 2N 434 MHz (PR 7Y1+8BB, 8BF, 8EK, 8EL+8TC, 8TD)
7H0 937 089 F Z 2R 434 MHz (PR 7Y1+8EC, 8ED, 8EM, 8EN+8TA)
7H0 937 089 F Z 2S 434 MHz (PR 7Y1+8EC, 8ED, 8EM, 8EN+8TC, 8TD)

7H0 937 089 G 315 MHz (PR 7L3)
7H0 937 089 G Z 2K 315 MHz (PR 7Y0+8BB, 8BF, 8EK, 8EL+8TA)
7H0 937 089 G Z 2L 315 MHz (PR 7Y0+8BB, 8BF, 8EK, 8EL+8TC, 8TD)
7H0 937 089 G Z 2P 315 MHz (PR 7Y0+8EC, 8ED, 8EM, 8EN+8TA)
7H0 937 089 G Z 2Q 315 MHz (PR 7Y0+8EC, 8ED, 8EM, 8EN+8TC, 8TD)
7H0 937 089 G Z 2M 315 MHz (PR 7Y1+8BB, 8BF, 8EK, 8EL+8TA)
7H0 937 089 G Z 2N 315 MHz (PR 7Y1+8BB, 8BF, 8EK, 8EL+8TC, 8TD)
7H0 937 089 G Z 2R 315 MHz (PR 7Y1+8EC, 8ED, 8EM, 8EN+8TA)
7H0 937 089 G Z 2S 315 MHz (PR 7Y1+8EC, 8ED, 8EM, 8EN+8TC, 8TD)

7H0 937 088 434 MHz (PR 5D0, 5D1, 5D9+7L6)
7H0 937 088 Z 0A 434 MHz (PR 8BB, 8BF, 8EK, 8EL+7Y0)
7H0 937 088 Z 0B 434 MHz (PR 8EC, 8ED+7Y0)
7H0 937 088 Z 0C 434 MHz (PR 8BB, 8BF, 8EK, 8EL+7Y1)
7H0 937 088 Z 0D 434 MHz (PR 8EC, 8ED+7Y1)

7H0 937 088 A, 315 MHz (PR 5D0, 5D1, 5D9+7L6)
7H0 937 088 A Z 0A 315 MHz (PR 8BB, 8BF, 8EK, 8EL+7Y0)
7H0 937 088 A Z 0B 315 MHz (PR 8EC, 8ED+7Y0)
7H0 937 088 A Z 0C 315 MHz (PR 8BB, 8BF, 8EK, 8EL+7Y1)
7H0 937 088 A Z 0D 315 MHz (PR 8EC, 8ED+7Y1)


PR codes.

5D0 Without carrier frequency.
5D1 Carrier frequency: 433.92 MHz - 434.42 MHz.
5D9 Carrier frequency: 433.92 MHz - 434.42 MHz, with a modified transmission period.
7L3 Without start/stop system, without regenerative braking.
7L3 Without start/stop system, without regenerative braking.
7L6 Start/stop system with regenerative braking.
7Y0 Without lane change assist.
7Y1 Lane change assistant.
8BB Halogen headlight for driving on the right.
8BF Halogen headlight for driving on the left.
8EC Bi-functional headlight with gas discharge lamp, for driving on the left.
8ED Bi-functional headlight with gas discharge lamp, for right-hand traffic.
8EK Headlight with double reflector for driving on the left.
8EL Headlight with double reflector for driving on the right.
8EM bi-functional headlight with gas discharge lamp and fixed bending light, for driving on the left.
8EN Bi-functional headlight with gas discharge lamp and fixed bending light, for right-hand traffic.
8K3 Separate daytime running lights with low beam assist and "Coming Home" function.
8K8 Low beam assistant with "Coming Home" function.
8TA Without rear fog light.
8TC Rear fog light for driving on the right.
8TD Rear fog light for driving on the left.

According to that, in my case, it must be a 7H0 937 089 F Z2Q...

Regards,

Peter.

And?

Is everything already included?

Have you been able to create a light distribution pattern for the H7 headlights yet?

m;

Hi Martin!

Last Friday at 8:15 AM, I finally started working on the project. Before that, I had been tinkering with the wiring harness and all the connections almost every day, and testing the LED control system. I checked everything over and over again. The installation turned out to be more complicated than I had anticipated. Since I don't like any loose wires, and I hate using makeshift connections, I completely redesigned everything so that it's actually almost invisible. The wiring harness I created was tucked inside the protective sheaths of the existing harnesses, and the internal part was wrapped with a very fine non-woven adhesive tape. The original fuse locations were used, and all necessary signals were tapped directly at the connectors of the BCM.

The lower part, meaning the installation of the axle sensors and the replacement of the right, front suspension arm, was already taken care of. The new bumper with SWR was fitted with an original xenon wiring harness, the washer fluid reservoir was replaced, the pump was wired, and the tire pressure monitoring system (TPMS) cable was also routed to the ABS unit.

The whole process lasted until Friday at 6 PM, when the workshop unfortunately closed, as my van was on a lift there. It continued on Monday at 8 AM. Everything was carefully installed and reassembled. Unfortunately, I made a mistake when connecting the drive shaft cable to the BCM connector, not fully securing the connector, which resulted in the ABS, airbag control unit, etc. failing. The error was quickly found and fixed.

The LWR control unit then caused further problems. It cannot be coded. Even with the latest beta version 12.10.2, the control unit can be accessed, but either the coding is not accepted, or access is denied. It seems there isn't a label file yet .

The left headlight washer nozzle isn't working either; it's spraying water out to the side.

So, it's a construction site that's not quite finished yet.

Unfortunately, I didn't have time to take a picture of the light pattern produced by the H7 headlights. Since then, I haven't been driving in the dark.

Regards,

Peter.