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| D2 - Common Faults Quick links to all known common faults and their solutions |
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#1
3rd March 2023, 01:16 PM
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D2 S8 Cruise Control Module Location?
Hi All.
For the life of me I cannot find this. Can someone help? It is not by the windcreen mechanisim or under the ECU's in the sealed box.. Any Ideas? Many thanks in advance. 
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#2
3rd March 2023, 01:24 PM
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Depends if yours is Pre-facelift with a real throttle cable or facelift "fly-by-wire".
PF has a module deep inside the ECU box under the bonnet, FL it's just part of the standard engine ECU software so has no separate module. As ever, always requested, add details of your vehicle to your signature please, it makes answering queries such as this so much easier.
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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!) 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. 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. 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! 
Last edited by HPsauce; 3rd March 2023 at 01:27 PM.
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#4
3rd March 2023, 04:04 PM
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It's just ECU, stalk and wires for FL. If the engine runs it cannot be faulty ECU as it's very unlikely to fail in such a way that car still runs but CC does not work. It's usually just dirty/oxidised contacts in the stalk. Soakong in contact cleaner and exercising vigorously sometimes can bring it back. Cannot remember if there was an option to have D2 without CC so could be ECU coding to enable/disable CC
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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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#6
3rd March 2023, 04:14 PM
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Check CC is enabled in the ECU coding. Details are on the Ross Tech web site.
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#7
3rd March 2023, 05:14 PM
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Quote:
Could be the slider switch is faulty, depending which switch signals you're seeing. The button on the end is only for "set" and "reduce speed" functions. And you don't need to be driving to check the switch operation, at least with full VCDS as your OBD tool.
__________________
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!) 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. 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. 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!
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#9
3rd March 2023, 09:43 PM
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Do you have any error codes? Anything to do with pedals, gearbox, throttle body, missfires or MAF will stop CC from working
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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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#10
4th March 2023, 06:56 PM
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Hi All.
So checked with VCDS that all was 'switched on'. Then watched as I used the switch on stalk. All good. However, when you watch closely, there was a 0000 signal between the switching. This could cause the CC to deactivate? Sprayed contact cleaner in the stalk switch at the same time as switching and pressing all functions... back to VCDS and did the same switching....hey..well you would not believe....now clean switching with no 0000 signal in between switching. Road test next...all well..working perfectly. Many thanks to all. Cheers.
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