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| D3 - Interior Electrics Airbags, Sensors, climate modules, instrument clusters, switches etc |
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#1
24th August 2019, 11:47 AM
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Just a thought does anyone have a J126 controller knocking around, that I can borrow. You never know but the used one I got could also be faulty.
I'll then buy it off you, if it works or return it. Part number is 4E0820521
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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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#2
26th August 2019, 09:56 AM
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Still battling on with this, took interior apart and checked connections behind climate module and all is good.
Tried swapping old and replacement J126, still the same. I had a look at measuring blocks and things look wrong here. Address 08: Auto HVAC (4E0 910 043 ) 10:29:02 Group 044: Fresh air blower V2 0.000 A Current actual 0 h Solar usage 0.00 V Voltage actual 5.80 V Voltage specified The voltage specified goes up and down with the fan speed selection, but actual remains zero. Switch engine off and solar kicks in and fan starts, and will then stay on solar even with engine restarting although VCDS is reporting zero volts.
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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 10:03 AM.
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#3
26th August 2019, 10:34 AM
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Unlike a lot of other threads, mentioning lack of fuse 44 my D3 has one. Should have checked first before rooting around under the passenger carpet to discover mine is not there like in this post. http://forum.a8parts.co.uk/showpost....46&postcount=6
Anyway fuse was good, so now I am going to check the ground connection. Interestingly I removed the drivers side sill trim to get access to the grounds and now the car will not start either, and the starter is on the same ground point. Another observation, with fuse 44 removed, I get 12V on one side of the fuse, and the voltage from the solar roof feeding back on the other side. Another observation, with fuse 44 removed, the solar function of the fan continues to work and the fan spins.
__________________
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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#4
26th August 2019, 10:58 AM
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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.
__________________
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
26th August 2019, 11:26 AM
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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.
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#6
8th September 2019, 12:07 PM
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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.
__________________
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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#7
10th September 2019, 08:43 AM
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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.
__________________
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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