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D3 - Interior Electrics Airbags, Sensors, climate modules, instrument clusters, switches etc |
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Thread Tools | Display Modes |
#11
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Looking at the bottom of the UK drivers side A pillar under the carpet as suggested in another thread cannot see any ground points. What I do have is a fabric taped cover heading upto the fusebox.
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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 |
#12
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Well that's all the diagnostics I can do done, cannot see anything odd and everything checks fine.
Seems the controller J126 is not switching to 12v when commanded. I wonder if A8Parts would send a known good fan speed controller to me FOC so I can at least rule things out, I cannot trust my original or the other used one I ordered from elsewhere. I would of course pay for or return the part depending on outcome. I am sitting in the car now writing this, engine is on and the fan is outputting lovely cool air at 3c according to VCDS via solar power of course.
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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 Last edited by mannyo; 26th August 2019 at 11:29 AM. |
#13
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I've finally had enough of trying to fix this problem, so today put the whole blower motor assembly back together and took the car for a drive.
It's not been anywhere for weeks and covered 60 miles since mid July. I did not drive far, about 6 miles or so. Enough to warm up the engine , and put some charge back into the battery which I leave disconnected anyway. Can confirm the problem is still present, and not fixed. Solar power still working great but that's it.
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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 |
#14
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This is weird
So yesterday and today I've driven the car to work and back, and whilst sitting in the car park this morning the heater fan sprung into life, worked for about 30 seconds producing lovely warmth and then stopped again. Remember the fan works perfectly fine on solar, I really have no idea what's going on.
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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 |
#15
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Quote:
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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 |
#16
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Its weird, the motor must have a ground connection as it runs on solar. I've checked using a multimeter and all seems fine with regards to the incoming voltage.
I actually drove the D3 to hertfordshire last weekend, 350 mile round trip and on the Dorset to Herts leg the A/C actually came on around Winchester for 5 minutes and I had full control of the fan speed from the A/C controls. Get to Basingstoke and it's off again and did not work anytime after that when driving during the whole weekend except on solar. If the sky is clear, the fan continues on solar power pumping a very small amount of lovely cool air into the cabin even whilst driving. You are right, it sounds power related but no amount of wire wiggling in the blower motor housing, or even behind the climate controller gets it working again. No fan fault listed in VCDS, just the implausible signal because the unit is trying to run the fan but it is drawing 0 amps. Tempted to buy an aftermarket new unit from Germany to see what happens, but that's just under £100 plus delivery.
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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 Last edited by mannyo; 17th September 2019 at 02:54 PM. |
#17
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Just guessing here, because I know very little about these newfangled D3s .... but is there maybe some kind of fan speed controller that could be at fault? The power coming from the solar panels will be quite weak, so it's likely that it bypasses any fan speed control device to enable it to give every bit of power it's able to deliver directly to the motor. In fact I think Andrew had a similar issue with his D2 blower, did he not? If I understand correctly, the D2 has some kind of inline power/voltage regulator (aka 'the hedgehog') which was a likely suspect in his case. I'm wondering if the D3 has a similar power control unit.
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Mark ------------------------------------------------------ 2002 FE S8 Ebony Black Pearl ------------------------------------------------------ ------------------------------------------------------ Cars Owned: The Tesla Era: 2020 Model S Performance Ludicrous+ (present) (Black, with all black premium interior and carbon fibre décor, 21" sonic carbon twin turbine wheels and FSD capability) The Audi Era: '97 A8 4.2 (Ming Blue) --> '96 A8 4.2 QS (Dark Green) --> '02 FE S8 (present) The Citroen Era: '84 BX 1.6 RS --> '89 BX 1.9 DTR Turbo --> '94 XM 2.0L Turbo --> '96 XM 2.0L Turbo Exclusive --> '00 Xantia Activa 2.0L Turbo The Banger Era: '76 1.2L Lada VAZ-2101 (Ruski Fiat 124) --> '80 1.7L Morris Ital HL, finished in Ermine White and Rust |
#18
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Is it really running from solar when ignition is on/driving? Or is it just oncoming wind going through it and turning it? If it's definitely running from solar then it is not switching over as you cannot have solar and battery connected at the same time. On D2 it's separate relay doing switch over but on D3 I don't know, it could be internal relay inside climate control unit.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure |
#19
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I don't recall the relay setup, but the solar power circuit in a D2 totally bypasses the hedgehog and all other controls and basically just connects the panel straight to the fan motor.
It really is a simple setup; I think Ian (IT) documented the retrofit here long ago. I only really looked at the circuitry in order to fit a cutoff switch, which I placed in the earth side of the solar panel circuit. Easily accessible around the front passenger footwell. My (failing) memory says that I thought the relay was actually in the HVAC unit, but it may be that it's an external relay and the HVAC controls it. Either way, the D2 relay is in the more complex +ve circuitry, which is why I went for the solar earth for my switch. I would expect (hope) that the D3 didn't "reinvent the wheel" so follows a similar pattern/logic. My fan motor problems (currently not manifest) were equally evident in either mode by the way.
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions and extended leather. Ski hatch retrofit. Aftermarket reversing camera. DVB-T and XCarlink now removed as redundant. 2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (A much rarer model than a D2 S8 by the way!) Oh, and a brand new engine at just under 30,000 miles on the factory one! Finally: gone, but not forgotten..... 1998 D2 PF S8. Agate Grey/Platinum. Every option (I think) except electric rear seats, Tiptronic steering wheel, ski hatch, towbar & dimming door mirrors. e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later) 1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon. Added Auto-dim mirror, Leather seats, Trip computer, Cruise control, OEM Ford SatNav with CD changer. And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850! |
#20
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It's definitely separate relay on PF D2, maybe in FL they moved it inside AC unit.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure |
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