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Post by driftmeh on Dec 22, 2023 22:54:07 GMT
I seem to have got myself in a pickle. I did a retrofit of the gtd led tail lights. I removed the standard halogen lights and put the leds. I didn't do any coding before hand and It was working okay all of a sudden it showed a "check right tail light" fault after I removed the the tail lights to swap the bootlid to a gti bootlid. I assumed the harness on the bootlid was exactly the same as the one I had on my standard car.
From what I've gathered I'm assuming it's the inner tail light that's giving the warning? I've plugged it in and I have these codes
B12BF15 - Right tail lamp bulb Open circuit/short circuit to B+
static
B12C315 - Right brake light bulb Open circuit/short circuit to B+
Intermittent
U101400 - Control module incorrectly coded
static
U10DC00 - Local data bus 4 Electrical error
static
How can I sort this out? Or how can I get the warning triangle to reset?
Thanks in advance
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Post by dv52 (Australia) on Dec 23, 2023 20:15:05 GMT
driftmeh : Hi. It's not clear from your post if some of these faults resulted from the tail-light change-over process, or if the errors have been generated from the LED lamps in the new fittings (LEDs are far more efficient at producing photons than your old incandescent lamps- so they draw less electrical current, which the monitoring circuits in the module can see as an open-circuit) Try clearing the faults using OBD11 - do the errors re-appear? Don
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Post by driftmeh on Dec 27, 2023 3:12:55 GMT
Hi don
I've tried clearing the codes, but I got the orange triangle and the warning on the infotainment. The lights work perfect but it shows the error. To answer your question, the error only started from when I replaced the bootlid as mine had a big dent on it. The loom is the original car boot loom. I just transfered everything over.
Thanks Benson
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Post by dv52 (Australia) on Dec 27, 2023 21:19:37 GMT
Brenson: Hmm...... OK - more information, please!!
If this car was factory built with incandescent tail-light fittings, then the cable loom in the boot-lid would NOT have sufficient wires to operate the new GTD LED tail-lights! This is because OEM style LED tail-lights have an additional turn-signal lamp on the 2 x inner fittings.
How did you reconcile this deficiency on the retrofit project? And did you make any coding changes as part of the exercise (if so, please describe)?
Don
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Post by driftmeh on Jan 7, 2024 13:03:32 GMT
Hi Don, happy new year
Yes it left factory with incandescent bulbs. As for the inner turn light. I bought a loom that had a wire to go into the inner turn signal.
So when I fitted a new tailgate, I terminated it onto the plug that's inside the bootlid. Soo for now it works.
As for the coding all I've done was change the brake lights and the turn signals to led as well. Everything else is factory.
Is there a way I can use my bcm and run a wires from it? Or would I need a different bcm from a car that came with the led from Factory?
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Post by dv52 (Australia) on Jan 7, 2024 20:45:06 GMT
Brenson: Season's greeting to you too!! OK- so the answer to your question is that you shouldn't need a new module because the BCM in MQB platform cars (like your mk7) can be programmed to control both LED and incandescent tail-light fittings. That said, the harness that you installed with the new tail-lights has made this a non-OEM installation.
The interesting aspect of this problem is that the error messages in your first post don't relate to the turn-signal lamps!! With the information provided thus far - I'm not sure whether this is coding issue, or a wiring problem. Let's tackle the coding question first.
Please post-up screenshots of Leuchte21BR RC8 and Leuchte24SL HRA65. To be clear, I need to see the values for ALL 19 x channels for each Leuchte-set in your pictures
Don
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Post by driftmeh on Jan 10, 2024 18:11:46 GMT
Hello Don Yes my previous post. It turns out I had turned on something I wasn't meant to do. I reverted back to the oem coding and everything was okay until recently when I had a small hiccup at work with a forklift going through my bootlid. Story for another day. I've attached what you requested me to post. The only coding I've done was activate the 5 brake light mod from one of the old forum posts Other than that everything else hasn't been touched I think Much appreciate your help.   |
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Post by dv52 (Australia) on Jan 10, 2024 21:30:19 GMT
Brenson: Hmm......... please don't take offense (because none is intended) - but your screenshots show a very innovative Leuchte-programming attempt!! 
The Leuchte-sets that I requested in your pictures relate to the lamps on the right car-side tail-lights (because your faults relate to the right car-side).
However, and again with no offense intended, because of the values in your screenshots - I fear that maybe (perhaps) the Leuchte-programming on the mating lamps for the left car-side might be equally "innovative"! My apology if this assumption is incorrect.
Anyway, I suggest that you make changes to both car-sides as below:
Right car-side: Leuchte21BR RC8 and Leuchte24SL HRA65
Left car-side: Leuchte20BR LA71 and Leuchte23SL HLC10
- Lasttyp > 34 - LED Bremsleuchten
- Lampendefektbitposition > don't change
- Fehlerort mittleres Byte DTC-DFCC > don't change
- Lichtfunktion A > Bremslicht
- Lichtfunktion B > nicht aktiv
- Dimmwert AB > 100
- Lichtansteuerung HD AB > Always
- Lichtfunktion C > Standlicht allgemein (Schlusslicht; Positionslicht; Begrenzungslicht)
- Lichtfunktion D:
- Leuchte21BR RC8 > Parking light right
- Leuchte24SL HRA65 > nicht aktiv
- Leuchte20BR LA71 > Parklicht links (beidseitiges Parklicht aktiviert li & re)
- Leuchte23SL HLC10 > nicht aktiv
- Dimmwert CD > 10
- Dimming Direction CD > maximize
- Lichtfunktion E > nicht aktiv
- Lichtfunktion F > nicht aktiv
- Dimmwert EF > 0
- Dimming Direction EF > maximize
- Lichtfunktion G > nicht aktiv
- Lichtfunktion H > nicht aktiv
- Dimmwert GH > 0
- Dimming Direction GH > maximize
After making the changes - clear ALL errors and cycle ignition - Do any errors return?
Don
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Post by driftmeh on Jan 11, 2024 17:44:24 GMT
Hi Don
First off I appreciate all the help you are giving me
I take no offense you can't learn anything if you haven't made any mistakes.I just need to stop trusting what youtube and other posts do or copy what they suggest
As for all the changed they are done, but I still have the fault. This is what it says after clearing it and cycling the ignition. Even left it for a while and it still came up with check right tail light.
B12BF15 - Right tail lamp bulb Open circuit/short circuit to B+
static
U101400 - Control module incorrectly coded
static
U10DC00 - Local data bus 4 Electrical error
static
B122415 - Spray nozzle heater Open circuit/short circuit to B+
static
Out of curiosity I thought let me have a look at the live data output for the brake lights and everything is okay except for
Connector number - Plug A
connector terminal number - 65
Duty cycle - 8.50%
Signal state - active
Open circuit or short to positive
Connector number - plug C
connector terminal number - 6
Duty cycle - 18.00%
Signal state - active
Open circuit or short to positive
I don't know if that will help at all. Just thought I would shoot in the dark with that one.
Thanks Benson
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Post by dv52 (Australia) on Jan 11, 2024 23:18:45 GMT
Brenson: hm........ curious!!! What country is this? Yes, thanks for providing the live-data information (good pick-up).
It's possible to translate the live data records onto the Leuchte-programmimg values in my suggestion and make a diagnostic hypothesis like this: Consider the nomenclature on Leuchte24SL HRA65: - the "A" means "Socket A". The connectors on the housing of the central electrics module (otherwise called BCM) has 3 x sockets - A, B and C (see my BCM picture below)
- the "65" means pin #65
- the "R" means "Rechts", or "right-side"
So, consider your Live-data records
- Connector number - Plug A
- Connector terminal number - 65
- Duty cycle - 8.50%
- Signal state - active
- Open circuit or short to positive
Clearly the first 2 x records align in both instances. Duty cycle is a measure of lamp dimming- this car uses Pulse-Width-Modulation (PWM) for lamp dimming. I suspect that in this case, the value reflects my suggested setting Dimmwert CD > 10. This dimming level happens when the Parking-Light function is activated.
So, what the live data is saying is that the central electrics module has sent a Leuchte-command to the lamp that is connected to pin #65, socket A - but the monitoring circuits inside the module has detected an inappropriate flow of electrical current in the wire that's terminated on the lamp (I suspect zero Amps). In addition to the odd coding values in your previous screenshots, this new information suggests (to me, at least) that there is a problem with either the wiring loom that runs to the rear of the car, or the terminations on route, or the tail-light fitting
Not sure about Leuchte27NSL RC6 - this Leuchte-set doesn't normally have a brake-light function. Please post-up screenshots (again, I need to see ALL 19 x channel values in your pictures)
Don
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Post by driftmeh on Jan 12, 2024 3:21:42 GMT
 I had a rough idea that it was something to do with the pinout of the bcm. Thanks for clarifying that one. Country wise it's England. Also find attached the results of leuchte27 I'll have a look at the light clusters to make sure there isn't any corroded pins or dodgy connectors Thanks |
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Post by dv52 (Australia) on Jan 12, 2024 20:37:50 GMT
Brenson: This is indeed a most interesting (and very curious) car!!! Your Leuchte27NSL RC6 is currently programmed for the following light-functions: - DRL
- Public Lighting
- Brake-light
And the Leuchte-set has been programmed to operate a LED style lamp (including the correct factory settings for diagnostics and lamp monitoring)
However, the odd aspect of the current programming is that on cars that are factory built with incandescent tail-lights (like your mk7), this Leuchte-set is ALWAYS deactivated. This means that on these "incandescent tail-light" cars there is NO wire terminated on pin #6, Socket C on the central electrics module - which also means that there is NO wire for this Leuchte-set in the tail-light loom at the rear of the car!!
Or said another way, Leuchte27NSL RC6 is normally ONLY active on mk7s that have been factory built with LED tail-lights
So- riddle me this: do any of the lamps on the tail-lights of this car illuminate as DRL (I suspect not)?
If the answer to my question above is NO - deactivate the Leuchte-set like this:
Leuchte27NSL RC6
Lasttyp 27 > not active
Lampendefektbitposition 27 > 0
Fehlerort mittleres Byte DTC-DFCC 27 > 0
Lichtfunktion A 27 > not active
Lichtfunktion B 27 > not active
Dimmwert AB 27 > 0
Lichtansteuerung HD AB 27 > Always
Lichtfunktion C 27 > not active
Lichtfunktion D 27 > not active
Dimmwert CD 27 > 0
Dimming Direction CD 27 > maximize
Lichtfunktion E 27 > not active
Lichtfunktion F 27 > not active
Dimmwert EF 27 > 0
Dimming Direction EF 27 > maximize
Lichtfunktion G 27 > not active
Lichtfunktion H 27 > not active
Dimmwert GH 27 > 0
Dimming Direction GH 27 maximize
Don |
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Post by driftmeh on Jan 16, 2024 7:46:54 GMT
Hi Don
Answer to the question is no
I've set leuchte27 channels to not active and reset the code, locked it and left it over night. Started it this morning and the triangle of doom has disappeared.
Thank you soo much Don. You my friend is a Legend.
I still don't know where I got the coding from 😂,
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