Monster MotorsportBadger5
Results 1 to 15 of 15
  1. #1
    Reverse Gear

    Status
    Offline
    Join Date
    Feb 2012
    Location
    Scotland
    Posts
    6

    Unhappy Factory LED DRL Failure?

    Hi,

    Today my dash bulb warning came on showing a fault on the right DRL / sidelight. I have checked and none of the LEDs are illuminating on the right hand side.

    A scan with VAG-COM gives the fault below in the Central Electrics.
    02897 - Supply Voltage for LED Module for DRL and Parking Light; Right
    010 - Open or Short to Plus
    The car is a 2009 A3 Sportback TDI Quattro Black Edition, so has factory Xenon and LED DRL lamps.

    The only results I can find from searching the fault code are from people who are carrying out LED retrofits.

    Has anyone experienced this before? I have read that if an LED unit fails the complete headlight unit needs to be replaced, so hoping there is something else to check first! ELSA Current Flow diagram shows an LED control unit inside the headlamp and two wires from the central electrics to this - I didn't want to put a meter across the wires in case they are running CAN rather than simply putting voltage to the LEDs, as not sure if the dimming etc. will be controlled by the central electrics or the LED control unit.

    Cheers.

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    Artimus's Avatar
    Short Back

    Status
    Offline
    Join Date
    May 2012
    Location
    Hertfordshire
    Posts
    1,841
    Have you tried any fixes yet? like pulling the plug to look for corroded contacts. HID still working okay?
    ................................................
    2009 A3 SB 2.0T DSG S line
    ''''''''''''''''''''''''''''''''''''''''''''''''''

  4. #3
    NHN
    NHN's Avatar
    Modmetractor

    Status
    Online
    Join Date
    Jan 2008
    Location
    Coding Something
    Posts
    27,073
    Didn't we discuss this before or was it another member with the same problem?

    Just meter the pins 10/12 & ground being 7, do a comparison of the other side to check readings as this uses the same pin numbers.

    OEM RETROFITS - CRUISE CONTROL - SAT NAV - BLUETOOTH - AMI - HEADLIGHT SYSTEMS

    PARKING SYSTEMS - DIAGNOSTICS - FAULT FINDING - BODYWORK - PAINTWORK

  5. #4
    Reverse Gear

    Status
    Offline
    Join Date
    Feb 2012
    Location
    Scotland
    Posts
    6
    Hi,

    It could have been another member, although I couldn't find any similar thread. Mine rather typically just went wrong on Friday afternoon before I was heading away for the weekend!

    All of the connections look shiny and wiring seems to be in tact, and everything else in the lamp is working fine - it is only the LEDs that are out.

    I have been out with the multimeter tonight and got the following results -
    Ign Off Key Out -
    Right 10 - 0.06
    Right 12 - 0.00
    Left 10 - 0.06
    Left 12 - 5.77

    Ignition On, DRL Off -
    Right 10 - 0.08
    Right 12 - 0.00
    Left 10 - 0.08
    Left 12 - 5.70

    DRL On -
    Right 10 - 12.14
    Right 12 - 12.15
    Left 10 - 12.14
    Left 12 - 12.15

    Sidelights On -
    Right 10 - 12.09
    Right 12 - 11.34
    Left 10 - 12.09
    Left 12 - 11.47
    With the DRLs or sidelights turned on the voltages are similar enough for me to believe that the headlamp unit is at fault and the central electrics unit and wiring are fine, although I can't understand why with the DRLs and sidelights off there would be 5V at pin 12 of the left lamp but 0V at the right one?

    Assuming the headlamp unit is faulty, is there anything that may be repairable inside? Seems strange for all of the LEDs to blow at the same time, so I presume it is some LED control unit in the lamp that has gone. If it wasn't a case of removing the bumper etc. to get the lamp out I'd just go ahead and remove it to take a look, but didn't have time to get the bumper off tonight.

    Cheers.

  6. #5
    NHN
    NHN's Avatar
    Modmetractor

    Status
    Online
    Join Date
    Jan 2008
    Location
    Coding Something
    Posts
    27,073
    Well with those readings, next step is to swap the lights over & test, but the voltage difference maybe part of the cold diagnosis system & the fact its already detected an issue with the right side & thus isn't applying any voltage.

    I wonder if the voltage shows up as 5.7 when you clear the fault with vcds in 09 for the right headlight, as affectively this resets the system.

    OEM RETROFITS - CRUISE CONTROL - SAT NAV - BLUETOOTH - AMI - HEADLIGHT SYSTEMS

    PARKING SYSTEMS - DIAGNOSTICS - FAULT FINDING - BODYWORK - PAINTWORK

  7. #6
    Reverse Gear

    Status
    Offline
    Join Date
    Feb 2012
    Location
    Scotland
    Posts
    6
    Thanks for the quick reply. I thought the same about the voltages, but by the time I measured the voltage at the left headlight the fault for it was already showing up in VCDS too due to having the plugs disconnected. I did try resetting the faults afterwards and rechecked, but the results were still the same.

    Looks like its time to swap the lamps, or if I can get hold of the correct plug housing handy it might be easier to rig up a test loom to extend the wiring over to the other side of the car to test in place without removal - I should get away with just extending over pins 7, 10 and 12 to test the LEDs I think.

  8. #7
    NHN
    NHN's Avatar
    Modmetractor

    Status
    Online
    Join Date
    Jan 2008
    Location
    Coding Something
    Posts
    27,073
    Yeah the connectors can be bought of audi aswell as the pins & sounds like a plan, but you could take bumper of quicker than getting those parts.

    OEM RETROFITS - CRUISE CONTROL - SAT NAV - BLUETOOTH - AMI - HEADLIGHT SYSTEMS

    PARKING SYSTEMS - DIAGNOSTICS - FAULT FINDING - BODYWORK - PAINTWORK

  9. #8
    Reverse Gear

    Status
    Offline
    Join Date
    Feb 2012
    Location
    Scotland
    Posts
    6
    Just to update, I got the pins and plug housings yesterday and made up a loom to test the headlamp and wiring on the other side without removal.

    Headlamp unit is definitely at fault, it must be the LED control unit that has gone in it, so looks like a replacement headlamp is the way forward. Not a cheap fix unfortunately!

  10. #9
    NHN
    NHN's Avatar
    Modmetractor

    Status
    Online
    Join Date
    Jan 2008
    Location
    Coding Something
    Posts
    27,073
    What's the part number of your headlight?

    OEM RETROFITS - CRUISE CONTROL - SAT NAV - BLUETOOTH - AMI - HEADLIGHT SYSTEMS

    PARKING SYSTEMS - DIAGNOSTICS - FAULT FINDING - BODYWORK - PAINTWORK

  11. #10
    Reverse Gear

    Status
    Offline
    Join Date
    Feb 2012
    Location
    Scotland
    Posts
    6
    Headlight part number is 8P0 941 030 BF.

  12. #11
    NHN
    NHN's Avatar
    Modmetractor

    Status
    Online
    Join Date
    Jan 2008
    Location
    Coding Something
    Posts
    27,073
    The lights £374 from audi mate, we maybe able to save a few quid & get delivered to you, but we're not talking vast amounts, but we can try & help.

    OEM RETROFITS - CRUISE CONTROL - SAT NAV - BLUETOOTH - AMI - HEADLIGHT SYSTEMS

    PARKING SYSTEMS - DIAGNOSTICS - FAULT FINDING - BODYWORK - PAINTWORK

  13. #12
    Reverse Gear

    Status
    Offline
    Join Date
    Feb 2012
    Location
    Scotland
    Posts
    6
    Thanks for the offer, can get a bit of discount from Audi locally though so will prob go down that route and save any hassle with delivery etc.

  14. #13
    Reverse Gear

    Status
    Offline
    Join Date
    Sep 2013
    Posts
    2
    I have just had the same happen, where is the control unit to swapover and check?

  15. #14
    NHN
    NHN's Avatar
    Modmetractor

    Status
    Online
    Join Date
    Jan 2008
    Location
    Coding Something
    Posts
    27,073
    On bottom of headlights.

    OEM RETROFITS - CRUISE CONTROL - SAT NAV - BLUETOOTH - AMI - HEADLIGHT SYSTEMS

    PARKING SYSTEMS - DIAGNOSTICS - FAULT FINDING - BODYWORK - PAINTWORK

  16. #15
    Reverse Gear

    Status
    Offline
    Join Date
    Sep 2013
    Posts
    2
    Quote Originally Posted by NHN View Post
    On bottom of headlights.
    Not easy to get to is it. Any chance there is a link to a guide with images on how to access this?

 

 

Similar Threads

  1. My final version of Integrated LED DRL's
    By Richardesty in forum Audi S4/A4/A4 Cab (B7 Chassis)
    Replies: 33
    Last Post: 18th September 2009, 18:59
  2. Non LED DRLs
    By panamadi in forum A3/S3/Sportback (8P Chassis)
    Replies: 3
    Last Post: 17th August 2009, 16:27
  3. LED DRL's
    By Amchlolor in forum A3/S3/Sportback (8P Chassis)
    Replies: 4
    Last Post: 8th July 2008, 10:17
  4. LED DRL
    By 06060918@Brookes.ac.uk in forum A3/S3/Sportback (8P Chassis)
    Replies: 6
    Last Post: 6th June 2008, 07:37
  5. LED DRL
    By 06060918@Brookes.ac.uk in forum A3/S3/Sportback (8P Chassis)
    Replies: 1
    Last Post: 4th June 2008, 07:05

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO