1 Fog Light Fail - How Do I Resolve?

   #1  

Fireblade69

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I have been trying to resolve an issue with the right hand front fog light not working and throwing an error in DIS. In the UK this is an MoT (yearly roadworthiness test) failure which means that the car canot be driven on the road until rectified.

After extensive testing of the bulb, wiring, switches etc. the end result of all of that is that the Body Control Module is not sending 12V out on the pin when the front fog lights are switched on. The left hand side works fine And when I jump the pin on the circuit board to another live 12v point, the light will work - this proves the connector, cables, holder and bulb are all working. The cables from the bulb end to the pin on the connector pass continuity tests, the bulb and holder when plugged into the left hand side work fine, the left hand bulb and holder when plugged into the right hand side do not work - switch around test.

I’ve purchased the VCDS to help me solve this problem (plus a couple of other issues) either by diagnosing and fixing the issue or, as it looks like it is heading, by buying a 2nd hand BCM and recoding it to the car.

I would like some suggestions on how this can be done please. I have used VCDS (VAG-COM when I had it back in the day) but that was years ago so I’m relearning.

Scan Output

01500 - Bulb for Fog-Lamps; Right (L23)
010 - Open or Short to Plus
Freeze Frame:
Fault Status: 01101010
Fault Priority: 4
Fault Frequency: 254
Reset counter: 192
Mileage: 139843 km
Time Indication: 0
Date: 2024.01.05
Time: 16:57:05

Freeze Frame:
Term 15 On
Voltage: 12.60 V
ON
ON
Term 50 Off
OFF
OFF
 
Last edited:
   #3  

Fireblade69

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I Hope this is correct!

Code:
Sunday,07,July,2024,08:37:00:40922
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 11 x64
VCDS Version: 24.5.0.0 (x64)  HEX-V2 CB: 0.4643.5
Data version: 20240429 DS355.0
www.Ross-Tech.com
 
 
VIN: TRUZZZ8J8B1025925   License Plate:
 
 
Chassis Type: 8J (8P0)
Scan: 01 03 08 09 15 16 17 19 25 37 42 44 46 47 52 55 56 61 77
 
VIN: TRUZZZ8J8B1025925  
 
01-Engine -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: OK 0000
37-Navigation -- Status: Cannot be reached 1100
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: Malfunction 0010
52-Door Elect, Pass. -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
61-Battery Regul. -- Status: OK 0000
77-Telephone -- Status: Malfunction 0010
-------------------------------------------------------------------------------
Address 01: Engine (CES)       Labels:. 06J-907-115-CES.clb
  Part No SW: 8J0 907 115 AJ    HW: 8J0 907 115 AJ
  Component: 2.0l R4/4V AVS   01 0080 
  Revision: EIH06---    Serial number: AUX7Z0K3FNS06L
  Coding: 0113000C18070160
  Shop #: WSC 01211 210 01254
  VCID: 74B6062C82B2D20A43B-8020
  VINID: 92296AAAA21A212040085242141DD5EE35
 
No fault code found.
Readiness: 0000 0000
 
-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 8J0-614-517.clb
  Part No SW: 8J0 614 517 B    HW: 8J0 614 517 B
  Component: ESP MK60E1          0010 
  Revision: 00H60001   
  Coding: 0083344
  Shop #: WSC 01236 785 00200
  VCID: 2C06DE4C1A02CACADBB-8078
 
No fault code found.
 
-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 8J0-820-043.clb
  Part No SW: 8J0 820 043 BB    HW: 8J0 820 043 BB
  Component: J255  Klima 1 Zone  0110 
  Revision: 00H09006    Serial number: 00000001184650
  Coding: 1573892
  Shop #: WSC 01236 785 00200
  VCID: 678C6160C3642992F69-8032
 
No fault code found.
 
-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 8P0-907-063.clb
  Part No SW: 8P0 907 063 H    HW: 8P0 907 063 H
  Component: BCM PQ35  H   108 0615 
  Revision: 00108 AG   
  Coding: 46000B2FA005F1202070C9E00000094C521E58AA3000D928DC000E440045
  Shop #: WSC 01236 758 00200
  VCID: 3928F718E9506F6250D-806C
 
  Subsystem 1 - Part No SW: 8J2 955 119 A    HW: 8J2 955 119   Labels: 1KX-955-119.CLB
  Component: Wischer AU354  H08 0070
  Coding: 00FD10
 
  Subsystem 2 - Part No: 8J0 951 177
  Component: DWA-Sensor H0  H03 0030
 
  Subsystem 3 - Part No: 1K0 951 605 C
  Component: LIN BACKUP HO  H05 1501
 
2 Faults Found:
01500 - Bulb for Fog-Lamps; Right (L23)
           010 - Open or Short to Plus
            Freeze Frame:
                   Fault Status: 01101010
                   Fault Priority: 4
                   Fault Frequency: 254
                   Reset counter: 183
                   Mileage: 139843 km
                   Time Indication: 0
                   Date: 2024.01.05
                   Time: 16:57:05
 
            Freeze Frame:
                       Term 15 On
                   Voltage: 12.60 V
                       ON
                       ON
                       Term 50 Off
                       OFF
                       OFF
 
01503 - Bulb for 3rd Brake Light (M25)
           010 - Open or Short to Plus - Intermittent
            Freeze Frame:
                   Fault Status: 00101010
                   Fault Priority: 1
                   Fault Frequency: 64
                   Reset counter: 222
                   Mileage: 142933 km
                   Time Indication: 0
                   Date: 2024.06.02
                   Time: 10:11:54
 
            Freeze Frame:
                       Term 15 On
                   Voltage: 14.50 V
                       ON
                       ON
                       Term 50 Off
                       OFF
                       ON
 
 
-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 8J0-959-655.lbl
  Part No SW: 8J0 959 655     HW: 8J0 959 655
  Component: -t Airbag 9.43  H03 0020 
  Revision: 93H03002    Serial number: 0036K0057XZN 
  Coding: 0011636
  Shop #: WSC 01236 785 00200
  VCID: 79A83718A5D0AF6210D-802C
 
  Subsystem 1 - Serial number: 6332DRB40D908995-
 
  Subsystem 2 - Serial number: 6342DRB403BC0A20M
 
  Subsystem 3 - Serial number: 63747RB4061494C3M
 
No fault code found.
 
-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 8P0-953-549.lbl
  Part No SW: 8P0 953 549 K    HW: 8P0 953 549 K
  Component: J0527           H37 0070 
  Coding: 0004041
  Shop #: WSC 01211 210 01254
  VCID: 46D28CE4A4AE109A2DF-8012
 
  Subsystem 1 - Part No: XXXXXXXXXXX
  Component: E0221           H06 0030
 
No fault code found.
 
-------------------------------------------------------------------------------
Address 17: Instruments
Cannot be reached
 
-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 7N0-907-530-V2.clb
  Part No SW: 8P0 907 530 C    HW: 1K0 907 951
  Component: J533  Gateway H43 0311 
  Revision:   H43       Serial number: 280411F2003080
  Coding: 354101
  Shop #: WSC 01236 758 00200
  VCID: 3334C530CB3C95329A1-8066
 
3 Faults Found:
00470 - Company Comfort Databus in Single Wire
           011 - Open Circuit
            Freeze Frame:
                   Fault Status: 01101011
                   Fault Priority: 3
                   Fault Frequency: 172
                   Reset counter: 179
                   Mileage: 139843 km
                   Time Indication: 0
                   Date: 2024.01.05
                   Time: 16:45:59
 
01300 - Control Module for Navigation with CD-Rom (J401)
           004 - No Signal/Communication
            Freeze Frame:
                   Fault Status: 01100100
                   Fault Priority: 2
                   Fault Frequency: 1
                   Reset counter: 140
                   Mileage: 143234 km
                   Time Indication: 0
                   Date: 2024.06.15
                   Time: 14:12:34
 
01044 - Control Module Incorrectly Coded
           000 - - - Intermittent
            Freeze Frame:
                   Fault Status: 00100000
                   Fault Priority: 1
                   Fault Frequency: 254
                   Reset counter: 255
                   Mileage: 139843 km
                   Time Indication: 0
                   Date: 2024.01.05
                   Time: 16:45:59
 
 
-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
  Part No SW: 8J0 920 980 P    HW: 8J0 920 980 P
  Component: KOMBIINSTR. VDO H01 0591 
  Revision: D0H01004    Serial number: AUX7Z0K3FNS06L
  Shop #: WSC 00137 211 56823
  VCID: 3E22E404FC7E485A65F-806A
 
No fault code found.
 
-------------------------------------------------------------------------------
Address 37: Navigation
Cannot be reached
 
-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels: 8P0-959-801-MIN3.lbl
  Part No SW: 8J8 959 801 J    HW: 8J8 959 801 J
  Component: Tuer-SG         004 0102 
  Coding: 0000565
  Shop #: WSC 01236 785 00200
  VCID: 44D696EC9292228A33B-8010
 
No fault code found.
 
-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1K0-909-14x-GEN3.clb
  Part No: 8J0 909 144 M
  Component: EPS_ZFLS Kl. 235    3201 
  Revision: 00H20000   
  Shop #: WSC 01236 785 00200
  VCID: 3A2AE814E056647A597-806E
 
No fault code found.
 
-------------------------------------------------------------------------------
Address 47: Sound System        Labels: 8J0-035-223.lbl
  Part No SW: 8J0 035 223 D    HW: 8J0 035 223 D
  Component: J525 Amp High   H04 0160 
  Revision: PROD_01     Serial number: 00000000026911
  Coding: 0236117
  Shop #: WSC 01236 785 00200
  VCID: 25102B6879E8FB82045-8070
 
1 Fault Found:
01316 - ABS Control Module
           004 - No Signal/Communication - Intermittent
            Freeze Frame:
                   Fault Status: 00100100
                   Fault Priority: 6
                   Fault Frequency: 6
                   Reset counter: 223
                   Mileage: 140415 km
                   Time Indication: 0
                   Date: 2000.00.00
                   Time: 31:63:63
 
 
-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels: 8P0-959-802-MAX1.lbl
  Part No: 8J8 959 802 C
  Component: Tuer-SG         H02 0050 
  Coding: 0000565
  Shop #: WSC 01236 785 00200
  VCID: 3E22E404FC7E485A65F-806A
 
No fault code found.
 
-------------------------------------------------------------------------------
Address 55: Headlight Range        Labels: 8P0-907-357.lbl
  Part No: 8P3 907 357 B
  Component: Dynamische LWR  H02 0010 
  Revision: 00000001    Serial number:              
  Coding: 0000009
  Shop #: WSC 01236 785 00200
  VCID: 3C26EE0CEA625A4A4BB-8068
 
No fault code found.
 
-------------------------------------------------------------------------------
Address 56: Radio
Cannot be reached
 
-------------------------------------------------------------------------------
Address 61: Battery Regul. (J840)       Labels:. 1K0-907-534.clb
  Part No SW: 8P0 907 534     HW: 1K0 907 951
  Component: Batt.regelung H43 0311 
  Serial number: 280411F2003080
  Coding: F322015A
  Shop #: WSC 01236 758 00200
  VCID: 74B6062C8EB2D20A43B-8020
 
  Subsystem 1 - Part No SW: 8X0 915 181     HW: 8X0 915 181
  Component: J367-BDM  H07 0140
  Serial number: 00000000005650380248
 
No fault code found.
 
-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 8P0-862-335.lbl
  Part No SW: 8P1 862 335     HW: 8P1 862 335
  Component: FSE_256x BT     H41 0650 
  Revision: 00000000    Serial number: 00000005371721
  Coding: 0011422
  Shop #: WSC 01236 785 00200
  VCID: 74B6062C82B2D20A43B-8020
 
1 Fault Found:
02503 - Output Wire to Radio
           011 - Open Circuit
            Freeze Frame:
                   Fault Status: 01101011
                   Fault Priority: 5
                   Fault Frequency: 1
                   Reset counter: 140
                   Mileage: 143234 km
                   Time Indication: 0
                   Date: 2024.06.15
                   Time: 14:12:38
 
 
End----(Elapsed Time: 01:22, VBatt start/end: 12.0V/12.0V. VIgn 12.0V)-----
 
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   #4  

Dr Sheldon

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the end result of all of that is that the Body Control Module is not sending 12V out on the pin
It will send 12v for a few milliseconds - see a fault an switch power off !! You're not going to see that unless you use a scope, perhaps an LED or a 5w bulb.

Cheap or wrong bulbs can do this too but I see you have tried Swaptronics
 

Fireblade69

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Having swapped the bulbs and bulb carriers out and the fault stays in the same place plus the wiring loom all checks out (continuity all tested okay) then is there a way through VCDS of forcing the 12v to live?
 

Fireblade69

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Thanks @Uwe it is for the front fog light I need.
 

Fireblade69

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Awesome, I’ll have a look for it.
 
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