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D3 - Interior Electrics Airbags, Sensors, climate modules, instrument clusters, switches etc

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  #21  
Old 17th September 2019, 05:12 PM
HPsauce HPsauce is offline
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Quote:
Originally Posted by ainarssems View Post
It's definitely separate relay on PF D2, maybe in FL they moved it inside AC unit.
Someone will have and be able to interpret the D3 wiring diagram; it sounds to me EXACTLY like the relay isn't switching.
That of course could be a faulty relay or a failing trigger signal (or wiring).
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
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!)
Finally: gone, but not forgotten.....
1998 D2 PF S8. AgateGrey/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, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
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  #22  
Old 17th September 2019, 07:18 PM
MikkiJayne MikkiJayne is offline
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The solar panel is connected directly to J126 blower control unit. That appears to have a single connection to / from J255 climatronic control unit.

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  #23  
Old 17th September 2019, 09:17 PM
HPsauce HPsauce is offline
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So "almost, but not quite, totally unlike a D2". I guess V2 is the blower motor and J355 the solar panel?
What is C20?
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
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!)
Finally: gone, but not forgotten.....
1998 D2 PF S8. AgateGrey/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, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
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  #24  
Old 18th September 2019, 08:12 AM
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moltuae moltuae is offline
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Quote:
Originally Posted by HPsauce View Post
So "almost, but not quite, totally unlike a D2". I guess V2 is the blower motor and J355 the solar panel?
What is C20?
C20 looks like the solar panel to me, judging by the symbol. So I expect J355 is a DC-DC convertor (probably stepping up/down the solar panel voltage to provide a consistent, regulated output).
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  #25  
Old 18th September 2019, 08:56 AM
HPsauce HPsauce is offline
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Indeed, I didn't look properly at the C20 symbol. Another level of sophistication over the D2, so probably almost nothing to learn from my/our comments I'm afraid.
__________________
2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
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!)
Finally: gone, but not forgotten.....
1998 D2 PF S8. AgateGrey/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, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
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  #26  
Old 18th September 2019, 01:20 PM
MikkiJayne MikkiJayne is offline
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Yeah C20 is the panel, J355 is the regulator.
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  #27  
Old 19th September 2019, 10:25 AM
mannyo mannyo is offline
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J126 is the part I replaced, but the replacement I got was a used one from a car of similar age.

It's quiet possible that the used one is also faulty, so I might go ahead and buy the new no OEM one from ebay.

J126 is what controls the fan speed, it has a number of inputs, and just two wires going out to the fan motor itself.

The fan is definitely running on solar power when the engine is running, you can see it spinning quiet happily by looking into the box with the pollen filter removed, ant it's speed varies based on the amount of sun.

There is 12V coming into the controller from the car side, and the voltage from the sunroof varies based on the amount sun.

It is possible of course that J255 is faulty, in that maybe the required signal is not getting to J126. I have no means of checking this as I do not know what the signal that controls the speed of the fan into the controller is meant to look like. J255 has component protection, so it's not easy to just swap a replacement in.
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2004 A4 1.8T Sport Cabriolet, 89K Miles
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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.
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Last edited by mannyo; 19th September 2019 at 10:42 AM.
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  #28  
Old 19th September 2019, 10:48 AM
MikkiJayne MikkiJayne is offline
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From the SSP it looks like J126 is on the LIN bus so tricky to see what J255 is telling it.
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  #29  
Old 19th September 2019, 02:06 PM
mannyo mannyo is offline
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I found a document explaining the LIN bus, I guess its working because I don't have any fault codes except the implausible signal from J126. I do not have the no communication fault mentioned in this document.

http://www.volkspage.net/technik/ssp/ssp/SSP_286_d1.pdf
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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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  #30  
Old 20th September 2019, 03:24 PM
ainarssems ainarssems is offline
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Quote:
Originally Posted by mannyo View Post
J126 is the part I replaced, but the replacement I got was a used one from a car of similar age.

It's quiet possible that the used one is also faulty, so I might go ahead and buy the new no OEM one from ebay.

J126 is what controls the fan speed, it has a number of inputs, and just two wires going out to the fan motor itself.

The fan is definitely running on solar power when the engine is running, you can see it spinning quiet happily by looking into the box with the pollen filter removed, ant it's speed varies based on the amount of sun.

There is 12V coming into the controller from the car side, and the voltage from the sunroof varies based on the amount sun.

It is possible of course that J255 is faulty, in that maybe the required signal is not getting to J126. I have no means of checking this as I do not know what the signal that controls the speed of the fan into the controller is meant to look like. J255 has component protection, so it's not easy to just swap a replacement in.
I think it's safe to assume that default mode for J126 if it does not receive signal is to switch to solar for example when ignition is off and climatronic is switched off. So it looks like J126 in not seeing signal from J255 either because it is itself faulty and does not sense signal, there is break or short in wiring or J255 is faulty and not sending signal. You could start checking for break or short in wiring with multimeter and if you have oscilloscope you could check if there is any signal coming out of J255 and if it is reaching J126
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