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Thread: Alarm siren sounding.

  1. #1
    quattrojames's Avatar
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    Alarm siren sounding.

    When I shut the tailgate this morning, the alarm went off, Locking/unlocking it didn't stop it, and it get going even when I started the car! Luckily, after four cycles it stopped, and seemed fine afterwards. Locked the car at work and all was fine, but then the exact same thing happened when I cam to go home. As it coincided with closing the boot, I wondered if it was maybe a microswitch, or tailgate hinge wiring issue, but I seemed unable to replicate it.

    A scan showed code 01134

    01134 - Alarm Horn (H12)

    01134 - Alarm Horn (H12): No Signal/Communication

    Possible Symptoms

    • Anti-Theft Alarm sporadically triggered
    Possible Causes

    • Fuse(s) faulty
    • Wiring and/or Connector(s) from/to Alarm Horn (H12) faulty
    • Alarm Horn (H12) faulty
    Possible Solutions

    • Check Fuse(s)
    • Check Wiring and/or Connector(s) from/to Alarm Horn (H12)
    • Check/Replace Alarm Horn (H12)

    Then halfway through the evening it starts randomly going off and won't stop at all, so I remove the siren from the car. Tomorrow, I'll cut it open and see what's inside. Possibly just the batteries have gone, but I haven't had any of the telltale three beeps etc. Maybe the batteries have just leaked and killed the PCB.

    I'm assuming it's not a microswitch as nothing is showing on the scan, and the DIS shows the boot as shut, and presumably the siren would stop when you disarmed the car?

    Anything else I'm missing?
    Ingolstance Read about my A6 HERE.

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  3. #2
    Mav190sline's Avatar
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    James

    Sounds like the siren could be a good place to start. Working with pcbS daily I know first hand they can do some very funny things when faulty😡😡

    Hope you sort it

    Mark

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    pauldazzle's Avatar
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    Sounds like leaking batteries in the siren module to me. I had the same thing on an A3 Quattro a few years ago.
    A4 Avant B6 1.9 TDI 130 Sport (6) Moro Pearl Blue, GMBH S Line Kit, Decat, 165bhp remap, EGR delete, K&N panel, Dunlop SP Sport Max, Full Leather, Cruise Control, Full DIS, Bose, Audi phone prep, Cooled Glove Box, Rear privacy glass, Rear parking assist.
    2003 Seat Ibiza 1.2 TSI FR in Lima green.

  5. #4
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    Both correct.

    Batteries have leaked and killed the PCB. Interesting that I never had the three beep low battery warning from the siren.

    Replacement siren seems to be £40 ish used from ebay, so could have been worse.



    Ingolstance Read about my A6 HERE.

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    pauldazzle's Avatar
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    I didn't get the 3 beeps warning either, just the neighbours raising a lynch mob.
    A4 Avant B6 1.9 TDI 130 Sport (6) Moro Pearl Blue, GMBH S Line Kit, Decat, 165bhp remap, EGR delete, K&N panel, Dunlop SP Sport Max, Full Leather, Cruise Control, Full DIS, Bose, Audi phone prep, Cooled Glove Box, Rear privacy glass, Rear parking assist.
    2003 Seat Ibiza 1.2 TSI FR in Lima green.

  7. #6
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    Luckily B6 sirens are so quiet no one really hears them anyway...
    deano1978 likes this.
    Ingolstance Read about my A6 HERE.

  8. #7
    Pabs's Avatar
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    Mine has done this in the last week. Not had a proper look but i guess it is this as it no longer beeps when activated.
    A4 1.8T 190 S-Line, Stage 2 Shark Performance Map 230 BHP, Pipercross Panel Filter, Forge 007 DV, Blue Flame Performance Exhaust + High Flow Sports Cat, 8k HID Lights, 8k HID Fog Lights, LED Sidelights, LED Number Plate, Front + Rear Ambient Lighting, LED Interior Bulbs, Grooved Dimpled Disks, Ultimax Pads, RNS-E DVD, Tinted Windows, S4 Grill, Votex Rear Skirt, BOSE, Leather, Engine Covers, S4 Mirrors, RS4 Pedals, Gloss Black Wrapped Grills, 19" BBS LM's Summer, 19" RS6's Winter, Coilovers

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    Interesting. Glad you sorted it. Guess its something else that we all have to expect will pack up eventually. Lol
    B6 S4 4.2L V8 Cabriolet Black Manual Quad Milltek Non Res

 

 

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