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matthiasTDI96 Profi-Schrauber

Joined: 02/27/2003 Posts: 5886 Karma: +251 / -0
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10-04-2015, 7:36 Subject: Touran Light Fault (FLA, MDF) |
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Hello,
A friend recently bought a used Touran (it was just out of warranty and purchased from a private seller).
Problem: The vehicle constantly has its lights on. The installed FLA (Front Light Assistant) and the masked high beam do not function, and neither does the cornering light, turning light, or daytime running light.
The error code 01800, "light switch," is always present. Since the coding assistant in VCDS indicates everything appears to be okay (according to my understanding), it seemed more sensible to first investigate the source of the error rather than trying to correct it through coding.
Okay, so simply swapping it with the Sharan's headlight switch doesn't change anything. The position of the switch makes no difference (except for the parking lights, which it does activate; otherwise, the headlights are always on), and it hasn't made any improvement.
Next, I checked the wiring and connectors. Everything seems to be in order.
Dann im Internet gesucht. Einige berichten von dem Fehler (01800) nach dem Nachrüsten eines Regensensors. Jetzt lässt das den Schluss zu, das da irgendwo etwas falsch codiert ist. Ich habe einen Punkt dann ausprobiert, indem ich in Byte 11 mal eine 00 codiert habe. Resultat Licht aus, Lichtsensor arbeitete wie er sollte, FLA MFD funktionslos, Fehler weiter vorhanden. Nach Fahrzeugneustart aber wieder (trotz der Codierung) Licht ein bei Schalterstellung 0. I then restored the original encoding...
Of course, it can't be ruled out that the previous owner might have tinkered with things. All of the car's features are factory-installed, and he obtained a system report from VW, so it doesn't appear that anything has been added after the fact.
Now, does anyone among you have access to a similarly equipped vehicle and could help with a comparison of the coding?
The owner sent me the attached car scan via email; it wasn't done with my VCDS, as my scan is at home.
Code: |
Fahrzeugtyp: 1T (7N0)
Scan: 01 03 08 09 10 15 16 17 18 19 25 37 42 44 46 52 55 56 61 62
69 72 77 A5
Fahrzeug-Ident.-Nr.: WVGZZZ1TZCW02xxx Kilometerstand: 115600km
01-Motorelektronik -- Status: i.O. 0000
03-Bremsenelektronik -- Status: i.O. 0000
04-Lenkwinkelsensor -- Status: i.O. 0000
08-Klima-/Heizungsel. -- Status: i.O. 0000
09-Zentralelektrik -- Status: Fehler 0010
10-Einparkhilfe 2 -- Status: i.O. 0000
15-Airbag -- Status: i.O. 0000
16-Lenkradelektronik -- Status: i.O. 0000
17-Schalttafeleinsatz -- Status: i.O. 0000
18-Standheizung -- Status: i.O. 0000
19-Diagnoseinterface -- Status: i.O. 0000
25-Wegfahrsperre -- Status: i.O. 0000
37-Navigation -- Status: i.O. 0000
42-Türelektr. Fahrer -- Status: i.O. 0000
44-Lenkhilfe -- Status: i.O. 0000
46-Komfortsystem -- Status: i.O. 0000
52-Türelektr. Beifahr. -- Status: i.O. 0000
55-Leuchtweitenreg. -- Status: i.O. 0000
56-Radio -- Status: i.O. 0000
61-Batterieregelung -- Status: i.O. 0000
62-Türelektr. hi. li. -- Status: i.O. 0000
69-Anhänger -- Status: i.O. 0000
72-Türelektr. hi. re. -- Status: i.O. 0000
77-Telefon -- Status: i.O. 0000
A5-Front-/Vorfeldkamera -- Status: i.O. 0000
-------------------------------------------------------------------------------
Adresse 01: Motorelektronik (J623-CFHC) Labeldatei: DRV\03L-906-018-CFF.clb
Teilenummer SW: 03L 906 018 NQ HW: 03L 907 309 N
Bauteil: R4 2,0L EDC H25 0670
Revision: 41H25--- Seriennummer: 00000000000000
Codierung: 0019003A042401080000
Betriebsnr.: WSC 01324 020 00200
ASAM Datensatz: EV_ECM20TDI01103L906018NQ 003001
ROD: EV_ECM20TDI01103L906018GA.rod
VCID: 0607F1E3B98A9E1154B-8053
Kein(e) Fehlercode(s) gefunden.
Readiness: 0 0 0 0 0
-------------------------------------------------------------------------------
Adresse 03: Bremsenelektronik (J104) Labeldatei: DRV\1K0-907-379-60EC1F.clb
Teilenummer SW: 1K0 907 379 BJ HW: 1K0 907 379 BJ
Bauteil: ESP MK60EC1 H31 0121
Revision: 00H31001
Codierung: 323B601609240EFE4C1006E9901F7052350150
Betriebsnr.: WSC 01324 020 00200
VCID: 7BF19017FA48D3F93B5-802E
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 08: Klima-/Heizungsel. (J255) Labeldatei: DRV\5K0-907-044.clb
Teilenummer SW: 5K0 907 044 FA HW: 5K0 907 044 FA
Bauteil: Climatronic H18 1112
Revision: 00001003
Codierung: 0000004003
Betriebsnr.: WSC 01324 020 00200
ASAM Datensatz: EV_Climatronic A01010
ROD: EV_ClimaAutoBasis_VW36.rod
VCID: 6FE9B447B630BF5987D-803A
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 09: Zentralelektrik (J519) Labeldatei: DRV\1K0-937-08x-09.clb
Teilenummer SW: 5K0 937 087 M HW: 5K0 937 087 M
Bauteil: BCM PQ35 H 011 0048
Revision: BE011001
Codierung: 40180A3888251AE0400800C8510011E44F759008626DA520E480CF000049
Betriebsnr.: WSC 28226 123 104857
VCID: 3F892407AED00FD957D-806A
Subsystem 1 - Teilenummer: 1T1 955 119 A Labeldatei: DRV\1KX-955-119.CLB
Bauteil: Wischer 27071 26 0512
Codierung: 009795
Subsystem 2 - Teilenummer: 1K0 955 559 AH Labeldatei: DRV\1K0-955-559-AG.CLB
Bauteil: RLS 020811 05 54 0403
Codierung: 0730ED
1 Fehler gefunden:
01800 - Lichtschalter (E1)
008 - unplausibles Signal - Sporadisch
Umgebungsbedingungen:
Fehlerstatus: 00101000
Fehlerpriorität: 3
Fehlerhäufigkeit: 2
Verlernzähler: 21
Kilometerstand: 115606 km
Zeitangabe: 0
Datum: 2015.04.01
Zeit: 00:32:53
Umgebungsbedingungen:
Kl.15 EIN
Spannung: 14.55 V
ein
ein
ein
aus
aus
-------------------------------------------------------------------------------
Adresse 10: Einparkhilfe 2 (J791) Labeldatei: DRV\3AA-919-475.clb
Teilenummer SW: 3AA 919 475 L HW: 4H0 919 475 E
Bauteil: PARKHILFE PLA H06 0025
Revision: -------- Seriennummer: 56261119403136
Codierung: 358201
Betriebsnr.: WSC 01324 020 00200
ASAM Datensatz: EV_EPHVA2C000000000 002008
ROD: EV_EPHVA2C000000000_SE36.rod
VCID: 44832BEBCF366C010AF-8011
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 15: Airbag Labeldatei: DRV\1T0-909-605.lbl
Teilenummer SW: 1T0 909 605 E HW: 1T0 909 605 E
Bauteil: 02 AIRBAG VW8 022 0100
Revision: 02022000 Seriennummer: 003K4D03URJX
Codierung: 0012338
Betriebsnr.: WSC 01324 020 00200
VCID: 37794C2746E037999FD-8062
Subsystem 1 - Seriennummer: 6332QSME305B356EM
Subsystem 2 - Seriennummer: 6342QSME4C4F265C-
Subsystem 3 - Seriennummer: 6352QSME015D26408
Subsystem 4 - Seriennummer: 6362QSME325A2C5AR
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 16: Lenkradelektronik (J527) Labeldatei: DRV\5K0-953-569.clb
Teilenummer SW: 5K0 953 501 CF HW: 5K0 953 569 H
Bauteil: LENKS.MODUL 014 0140
Revision: FF010040 Seriennummer: 20110618101192
Codierung: 318A240000
Betriebsnr.: WSC 01324 020 00200
ASAM Datensatz: EV_VW360SteerWheelUDS A03004
ROD: EV_VW360SteerWheelUDS.rod
VCID: 70EBB73BAB0EA0A19E7-8025
Steuergerät für Multifunktionslenkrad:
Subsystem 1 - Teilenummer SW: 5K0 959 542 A HW: 5K0 959 542 A Labeldatei: DRV\3C8-959-537.CLB
Bauteil: E221__MFL-TAS H09 0013
Codierung: 820000
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 17: Schalttafeleinsatz (J285) Labeldatei: DRV\5K0-920-xxx-17.clb
Teilenummer SW: 1T0 920 885 A HW: 1T0 920 885 A
Bauteil: KOMBI H04 0407
Seriennummer: 00000000000000
Codierung: 181F01
Betriebsnr.: WSC 01324 020 00200
ASAM Datensatz: EV_Kombi_UDS_VDD_RM09 A04114
ROD: EV_Kombi_UDS_VDD_RM09_SK35.rod
VCID: 3667412389EACE9184B-8063
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 18: Standheizung Labeldatei: DRV\1K0-815-007.clb
Teilenummer: 7N0 963 272 A
Bauteil: Standheizer 043 4730
Revision: 00043000 Seriennummer: 09022127000000
Codierung: 0031032
Betriebsnr.: WSC 01324 020 00200
VCID: 336178375298DBB9A35-8066
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 19: Diagnoseinterface (J533) Labeldatei: DRV\7N0-907-530-V2.clb
Teilenummer SW: 7N0 907 530 L HW: 1K0 907 951
Bauteil: J533 Gateway H41 1620
Revision: H41 Seriennummer: 140711F1000818
Codierung: 358002
Betriebsnr.: WSC 01324 020 00200
VCID: 397D4A1FB0F421E9699-806C
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 25: Wegfahrsperre (J334) Labeldatei: DRV\5K0-920-xxx-25.clb
Teilenummer SW: 5K0 953 234 HW: 5K0 953 234
Bauteil: IMMO H04 0407
Seriennummer: 00000000000000
Codierung: 000000
Betriebsnr.: WSC 00000 000 00000
ASAM Datensatz: EV_Immo_UDS_VDD_RM09 A03009
ROD: EV_Immo_UDS_VDD_RM09_SE25.rod
VCID: 6ADFA5538DD25A71D03-803F
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 37: Navigation (J0506) Labeldatei: DRV\1T0-035-680.clb
Teilenummer SW: 1T0 035 680 P HW: 1T0 035 680 F
Bauteil: RNS-MID H55 5238
Revision: AB001001 Seriennummer: VWZ6Z7L2204046
Codierung: 04000442040000802009
Betriebsnr.: WSC 01324 020 00200
VCID: 3B715017BAC813F97B5-806E
Subsystem 1 - Teilenummer: 1T0 919 859 B
Bauteil: EU West V12 8195
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 42: Türelektr. Fahrer Labeldatei: DRV\1K0-959-701-MAX3.lbl
Teilenummer SW: 1T0 959 701 AA HW: 1T0 959 701 AA
Bauteil: Tuer-SG 009 2121
Codierung: 0135351
Betriebsnr.: WSC 01324 020 00200
VCID: 76E78123016A8E9144B-8023
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 44: Lenkhilfe Labeldatei: DRV\5N1-909-144.clb
Teilenummer SW: 5N1 909 144 M HW: 5N1 909 148 G
Bauteil: J500__APA-BS KL.293 1002
Revision: 1AH03733 Seriennummer: 00112160260401
Codierung: 0000258
Betriebsnr.: WSC 01324 020 00200
VCID: 3C73530B7FC614C172F-8069
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 52: Türelektr. Beifahr. Labeldatei: DRV\1K0-959-702-MAX3.lbl
Teilenummer SW: 1T0 959 702 S HW: 1T0 959 702 S
Bauteil: Tuer-SG 009 2121
Codierung: 0135607
Betriebsnr.: WSC 01324 020 00200
VCID: 489B3FDB3B1E4861E67-801D
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 55: Leuchtweitenreg. (J745) Labeldatei: DRV\5M0-907-357-V3.clb
Teilenummer SW: 5M0 907 357 E HW: 7L6 907 357 C
Bauteil: AFS-ECU H04 0100
Revision: -------- Seriennummer: --------------
Codierung: 038200104F000200
Betriebsnr.: WSC 01324 020 00200
ASAM Datensatz: EV_HeadlRegulVWAFSPt 002014
ROD: EV_HeadlRegulVWAFSPt_SE36.rod
VCID: 3667412389EACE9184B-8063
Left_headlamp_power_output_stage:
Subsystem 1 - Teilenummer SW: 1T0 941 329 A HW: 1T0 941 329 A
Bauteil: LeiMo links H06 0007
Codierung: 3D0000
Right_headlamp_power_output_stage:
Subsystem 2 - Teilenummer SW: 1T0 941 329 A HW: 1T0 941 329 A
Bauteil: LeiMo rechts H06 0007
Codierung: 3D0000
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 56: Radio (J0506) Labeldatei: DRV\1T0-035-680.clb
Teilenummer SW: 1T0 035 680 P HW: 1T0 035 680 F
Bauteil: RNS-MID H55 5238
Revision: AB001001 Seriennummer: VWZ6Z7L2204046
Codierung: 04000442040000802009
Betriebsnr.: WSC 01324 020 00200
VCID: 3B715017BAC813F97B5-806E
Subsystem 1 - Teilenummer: 1T0 919 859 B
Bauteil: EU West V12 8195
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 61: Batterieregelung (J840) Labeldatei: DRV\1K0-907-534.clb
Teilenummer SW: 7N0 907 534 HW: 1K0 907 951
Bauteil: Batt.regelung H41 1620
Seriennummer: 140711F1000818
Codierung: 030B185A
Betriebsnr.: WSC 01324 020 00200
VCID: 71EDB23FA804A9A9919-8024
Subsystem 1 - Teilenummer SW: 1K0 915 181 H HW: 1K0 915 181 A
Bauteil: J367-BDM H07 0180
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 62: Türelektr. hi. li. Labeldatei: DRV\1K0-959-703-GEN3.lbl
Teilenummer SW: 5K0 959 703 A HW: 5K0 959 703 A
Bauteil: Tuer-SG 007 2104
Codierung: 0131216
Betriebsnr.: WSC 01324 020 1012552
VCID: 326F7D33AD82D2B1A83-8067
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 69: Anhänger (J345) Labeldatei: DRV\1K0-907-383-MY8.lbl
Teilenummer SW: 1K0 907 383 F HW: 1K0 907 383 F
Bauteil: Anhaenger H09 0100
Revision: 3A001001 Seriennummer: 00000151102719
Codierung: 410D000100000000
Betriebsnr.: WSC 01324 020 00200
VCID: 306B773B638EE0A1DE7-8065
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 72: Türelektr. hi. re. Labeldatei: DRV\1K0-959-704-GEN3.lbl
Teilenummer SW: 5K0 959 704 A HW: 5K0 959 704 A
Bauteil: Tuer-SG 007 2104
Codierung: 0131216
Betriebsnr.: WSC 01324 020 1012552
VCID: 336178375298DBB9A35-8066
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse 77: Telefon (J412) Labeldatei: DRV\3C8-035-730-A.clb
Teilenummer SW: 3C8 035 730 D HW: 3C8 035 730 D
Bauteil: Telefon 022 0982
Revision: -------- Seriennummer: 35502105190059
Codierung: 010100010100010000000101
Betriebsnr.: WSC 12345 123 12345
ASAM Datensatz: EV_UHVPremi 002709
ROD: EV_UHVPremi_SE36.rod
VCID: 24438B6B2F764C012AF-8071
Kein(e) Fehlercode(s) gefunden.
-------------------------------------------------------------------------------
Adresse A5: Front-/Vorfeldkamera (R242) Labeldatei: DRV\3AA-980-654.clb
Teilenummer SW: 3AA 980 654 C HW: 3AA 980 654 A
Bauteil: MFK_Gen1 H08 0203
Seriennummer: 0152402228
Codierung: 010102000102020E0200040001000000
Betriebsnr.: WSC 01324 020 00200
ASAM Datensatz: EV_47X 001639
ROD: EV_47X.rod
VCID: 387B4F1B83FE38E1967-806D
Kein(e) Fehlercode(s) gefunden.
Ende----------------------------(Dauer: 03:46)-----------------------------
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Translated on 17-07-2026, 15:13.
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dieselmartin Profi-Schrauber


Joined: 03/13/2003 Posts: 10121 Karma: +29 / -0 Location: in der Werkstatt 2007 Volkswagen Passat Premium Support
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10-04-2015, 9:42 Subject: Touran Light Fault (FLA, MDF) |
Quote |
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Hi.
I once removed the white lines from the scan  .
Wow... a 3C8..D FSE, jealousy!
Okay, back to the topic:
My knowledge doesn't recognize byte 18 of the BCM in that way.
40180A3888251AE0400800C8510011E44F75 9008626DA520E480CF000049
However, I did it with a...
Code: |
Adresse 09: Zentralelektrik (J519) Labeldatei: RKS\1K0-937-08x-09.clb
Teilenummer SW: 1K0 937 087 J HW: 1K0 937 087 J
Bauteil: BCM PQ35 H 103 0615
Revision: 00103 AD
Codierung: 40180A3AE8251AE040080080710089EC437D0E88737D8D60648000000040
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compared.
Okay, he doesn't recognize "0E" here either...
Nevertheless:
Are you sure that byte is correct?
It's just a very rough guess  .
Okay, please provide the German text you would like me to translate into English. I will only provide the translation. Transparency, Teamwork
... there was another T.
I don't know what the f*ck it was.
Translated on 17-07-2026, 15:17.
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matthiasTDI96 Profi-Schrauber

Joined: 02/27/2003 Posts: 5886 Karma: +251 / -0
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10-04-2015, 10:04 Subject: Touran Light Fault (FLA, MDF) |
Quote |
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Thank you for editing; I'm not very good at it myself.
As I mentioned, I don't know the original state, so unfortunately, many things are possible. I'm happy to consider any suggestions.
Translated on 17-07-2026, 15:18.
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Roger Profi-Schrauber


Joined: 10/11/2002 Posts: 3035 Karma: +88 / -0 Location: Rodgau 2017 Volkswagen Golf Premium Support
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10-04-2015, 10:19 Subject: Touran Light Fault (FLA, MDF) |
Quote |
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Hi,
Was the windshield replaced?
There might be something wrong with the rain sensor. Gruß
Roger
MJ 2018 GTI Performance DLBA
Translated on 17-07-2026, 15:19.
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matthiasTDI96 Profi-Schrauber

Joined: 02/27/2003 Posts: 5886 Karma: +251 / -0
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10-04-2015, 10:27 Subject: Touran Light Fault (FLA, MDF) |
Quote |
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I had already suspected that the windshield has only a few minor chips, given its mileage of 115,000 km, but the car itself also shows signs of wear. According to Volkswagen's records, service intervals were performed at approximately 30,000, 60,000, 90,000, and 112,000 km, with the last one only being an oil change, for some reason. A new radiator was installed, but otherwise there's nothing else listed, which of course doesn't mean that other work wasn't done elsewhere.
Everything I see in the measurement blocks for the RLS (Radar Localizer System) and the camera makes sense, and there's also a distinction made between light being on and off.
I can only imagine that someone might have tampered with the code.
The acquaintance readily received a lot of information about the car from VW, but the local dealer couldn't fix the problem. He wants to replace the control unit (module) 09 and the light switch, then the A5 (camera), in order to solve the issue. This doesn't sound convincing to me, and it seems quite expensive.
Translated on 17-07-2026, 15:20.
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dieselmartin Profi-Schrauber


Joined: 03/13/2003 Posts: 10121 Karma: +29 / -0 Location: in der Werkstatt 2007 Volkswagen Passat Premium Support
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10-04-2015, 11:23 Subject: Touran Light Fault (FLA, MDF) |
Quote |
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Okay, so errors in the LDS (likely referring to a specific system or device) and "lights always on" definitely go hand in hand.
When operating an AUTO-LDS without RLS (Remote Lighting System), the light on the AUTO setting will always be illuminated.
If the vehicle is operated without the Lane Departure System (LDS), the headlights are always on.
As it stands, the error message and the phrase "short circuit after positive voltage" seem quite reasonable and point to a problem with the cables.
What do the MWB (Main Water Block) say when switching between different LDS (Liquid Distribution System) configurations?
Is everything making sense? / Does everything seem reasonable?
Is it the 3C8...A LDS?
Okay, please provide the German text you would like me to translate into English. I will only provide the translation. Transparency, Teamwork
... there was another T.
I don't know what the f*ck it was.
Translated on 17-07-2026, 15:23.
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dieselmartin Profi-Schrauber


Joined: 03/13/2003 Posts: 10121 Karma: +29 / -0 Location: in der Werkstatt 2007 Volkswagen Passat Premium Support
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10-04-2015, 11:29 Subject: Touran Light Fault (FLA, MDF) |
Quote |
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Ich hab in den MJ11er Golf+ mit o.g. BCM, regarding this RLS:
(0)
Code: |
Subsystem 2 - Teilenummer: 1K0 955 559 AG Labeldatei: RKS\1K0-955-559-AG.CLB
Bauteil: RLS 151210 05 55 0403
Codierung: 4730BB
|
You have.
0730ED ... the bit (4 instead of 0) at the beginning is not documented?!?!
(1) In my MJ07 RLS, the value is 0.
(2) Even the older coding tools (RLS.exe) do not take this into account.
(3) The Touran has activated the rain sensor wipers.
(4) Das hatte m.W. NONE from the factory.
From points 3 and 4, it follows that someone encoded it.
From 1 and 2, he may have deleted the bit that was presumably necessary from 0.
(5) If there's a problem with the LDS (Light Dependent Sensor) or RLS (Remote Light Switch), the light will always be on!
You can see the result.
Set bit 6 in byte 0 of the RLS.
I miss the LCode version that showed the set but undocumented bits  Transparency, Teamwork
... there was another T.
I don't know what the f*ck it was.
Translated on 17-07-2026, 15:25.
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matthiasTDI96 Profi-Schrauber

Joined: 02/27/2003 Posts: 5886 Karma: +251 / -0
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10-04-2015, 12:02 Subject: Touran Light Fault (FLA, MDF) |
Quote |
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Okay, so far I also see that as logical; if there's any kind of error, the failsafe light should always be on. It works correctly without the light switch, with its own light switch, and even with my light switch. Therefore, I don't suspect the switch itself. That's why the suspicion fell on a wiring problem. We checked the wiring as much as we could, but it wasn't 100% certain.
However, I'm going to investigate that "umbrella closure" issue; it's a good clue and reinforces the suspicion of some kind of obfuscation or manipulation.
Translated on 17-07-2026, 15:27.
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dieselschrauber Administrator


Joined: 04/12/2002 Posts: 18049 Karma: +792 / -0 Location: St.Gallen 2018 Volkswagen T6 
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11-04-2015, 10:02 Subject: Touran Light Fault (FLA, MDF) |
Quote |
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Quote: | | Therefore, the error message and the phrase "short circuit after positive voltage" sound quite okay and suggest a problem with the cables. |

Translated on 17-07-2026, 15:28.
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matthiasTDI96 Profi-Schrauber

Joined: 02/27/2003 Posts: 5886 Karma: +251 / -0
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11-04-2015, 11:56 Subject: Touran Light Fault (FLA, MDF) |
Quote |
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"Hmm, did I misunderstand something? Is an 'implausible signal' the same thing as a short circuit to the positive terminal? The cables are all fine; that's been checked again..."
Translated on 17-07-2026, 15:29.
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dieselschrauber Administrator


Joined: 04/12/2002 Posts: 18049 Karma: +792 / -0 Location: St.Gallen 2018 Volkswagen T6 
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11-04-2015, 12:12 Subject: Touran Light Fault (FLA, MDF) |
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Quote: | | Is an implausible signal the same as a short circuit to positive |
No, but in both cases, I wouldn't rule out wiring harness problems - especially if replacing the switch with a different one didn't work.
Can you check the different positions of the light switch within the measurement data blocks from the vehicle's body control module?
Best regards, Rainer.
Translated on 17-07-2026, 15:29.
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matthiasTDI96 Profi-Schrauber

Joined: 02/27/2003 Posts: 5886 Karma: +251 / -0
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11-04-2015, 15:23 Subject: Touran Light Fault (FLA, MDF) |
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Yes, that's possible and it works perfectly. It's completely inconspicuous... I need to check again on Sunday evening. Let's see what happens.
Translated on 17-07-2026, 15:30.
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matthiasTDI96 Profi-Schrauber

Joined: 02/27/2003 Posts: 5886 Karma: +251 / -0
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30-05-2015, 18:27 Subject: Touran Light Fault (FLA, MDF) |
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The errors caused by the component replacement have finally been fixed. Everything is now working perfectly again with the original code.
Translated on 17-07-2026, 15:30.
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dieselschrauber Administrator


Joined: 04/12/2002 Posts: 18049 Karma: +792 / -0 Location: St.Gallen 2018 Volkswagen T6 
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30-05-2015, 18:58 Subject: Touran Light Fault (FLA, MDF) |
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Thank you for your feedback!
Translated on 17-07-2026, 15:31.
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