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  #1  
Old 24th April 2018, 06:12 AM
mannyo mannyo is offline
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Default MY 2004 D3 electrical gremlins

I think my D3 is telling me its time to be sold, I have had her for 4 and half years now.

Latest problem.

Driving in stop and start traffic, out of the blue up will pop a series of faults on the DIS in the following order.

Headlight range control defective
Parking Brake Fault
And another I cannot remember.

ABS and ESP lights then come on in addition to the warning, and you cannot engage ACC cruise control.

The parking brake still works perfectly fine, if you turn off the engine before engaging.

I drove for three hours yesterday morning in regular traffic, and the car drove perfectly with no faults. I got stuck in traffic going to work, and within just a few minutes up pop the faults. The only thing I can think of is that in traffic the brake pedal is being used a lot more than when in motion, can a faulty brake switch cause this?
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2004 A4 1.8T Sport Cabriolet, 89K Miles
Past
2004 D3 A8 3.7 Quattro, Xenon, Bose, Blinds, Solar Sunroof, TV, ACC, phone and almost every option. 168K miles rising slowly
with retrofit AMI and DVB-T in place of Analogue
2003 Volvo S60 D5 SE Manual, 197K miles.
2001 D2 A8 3.7 QS, Bi-Xenon, Bose, Blinds, Electric Everything, retrofitted RNS-D, 191K Miles
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  #2  
Old 24th April 2018, 07:46 AM
Architex_mA8tey's Avatar
Architex_mA8tey Architex_mA8tey is offline
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Quote:
Originally Posted by mannyo View Post
can a faulty brake switch cause this?
Yes it can - and has done to my D3 - or at least the ABS and ESP lights part can be (I think that the Headlight range and Parking brake may well be seperate faults)
and the brake switch isn't too expensive or difficult to change so I'd definitely start with that first

Your adaptive cruise won't work of there is known issues with the ABS and ESP for safety reasons I would have thought
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Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange
2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee
20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble
Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior
Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble
Audi A8L D2 4.2 Petrol with LPG - Ebony Black
Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black
Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior
and some other A8's A8L's and Mercs

Last edited by Architex_mA8tey; 24th April 2018 at 07:48 AM.
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  #3  
Old 24th April 2018, 08:59 AM
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Delboy Delboy is offline
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I agree with Neil, first stop would be VCDS scan to see what errors are logged as brake switch defects will be logged in that
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Old 24th April 2018, 09:29 AM
mannyo mannyo is offline
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I've got an old dodgy copy of vcds, I'll try and scan the car later and post the results.
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Manny
2004 A4 1.8T Sport Cabriolet, 89K Miles
Past
2004 D3 A8 3.7 Quattro, Xenon, Bose, Blinds, Solar Sunroof, TV, ACC, phone and almost every option. 168K miles rising slowly
with retrofit AMI and DVB-T in place of Analogue
2003 Volvo S60 D5 SE Manual, 197K miles.
2001 D2 A8 3.7 QS, Bi-Xenon, Bose, Blinds, Electric Everything, retrofitted RNS-D, 191K Miles
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  #5  
Old 24th April 2018, 10:07 AM
Architex_mA8tey's Avatar
Architex_mA8tey Architex_mA8tey is offline
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Quote:
Originally Posted by mannyo View Post
I've got an old dodgy copy of vcds, I'll try and scan the car later and post the results.
I'll be down to Beaulieu at the weekend on Sunday at the show otherwise Manny and will happily catch up and plug in my vagcom for you somewhere if that helps, just let me know
__________________

Confidence is the feeling you have before you know better . . . .
Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange
2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee
20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble
Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior
Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble
Audi A8L D2 4.2 Petrol with LPG - Ebony Black
Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black
Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior
and some other A8's A8L's and Mercs
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  #6  
Old 24th April 2018, 08:58 PM
Joe2.0E Joe2.0E is offline
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I wouldn't be certain about the brake switch, when mine went the gearbox went into limp mode. I drove it to the garage thinking the gearbox was toast. I was thrilled to be told it just needed a brake switch.
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