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D3 - Everything Else Anything that doesnt fit elsewhere |
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Thread Tools | Display Modes |
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#1
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ECU and battery Problems
The ECU managemnt warning light comes on quite often when i start the car or leave it on but not running the engine for a minute or so, sometimes it turns a few things
The battery meter is down to 10%, Several times it went back to 100% but goes back down if i use any electrics without the engine running. I thought the battery may be old and have booked it in for a new one, however Im now unsure that it is the battery. I tested it today with a multimeter and found that it was at 12.6V turned the ignition to on for a minute , UCU warning came up, retested the battery still the same. unlike others not once has the car failed to start or even had a problem starting. it seems to me the power is there but the computer doesnt think so. If the battery Regulator is at fault it wouldnt charge the battery and the voltage would be drained. where is the problem, is it likely to still be a battery problem?
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______________________________________________ A8 4.2TDI - Ice Silver, Comfort heated/cooled/massage Seats, Alcantara, Extended Leather pack, Ambient light pack, Solar roof, Night Vision, Lane change assist, Audi presense, Audi BrakeGuard, ACC Cruise, Blinds, Quad Air, AMI, Online services, Parking with rear Camera, Aluminium brushed inlays, Adaptive Zenons, High beam assist, Bose Sound, and more Gone but not forgotten: A8 D3 2005- AMI HDD, Audible Parking, TV, NAV, Bluetooth, Hybrid TV, Aftermarket headrest monitors, Rosstech VCDS / Vagcom |
#2
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What codes is VagCom showing if any?
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Conan (the Librarian) Watch it if you dare Currently, 2000 S8, Merlin Purple, Leather Pack 1, Winter Pack 1, SPAX adjustable suspension, AP Racing 6 pot front caliper, 385mm fully floating disks, EBC Yellow Stuff Pads, Black Diamond grooved rear disks and predetor pads, D2 Doctors Brake Block. 1997 4.2 A8SQ - the Projekt. 12 years and ongoing! 1997 4.2 A8SQ - Ming Blue. Restoration sat waiting; saved from the Scrapyard 2003 C5 Allroad 4.2Q - Cobolt Blue. Towing car. Laid up awaiting manual conversion. 2005 C5 Allroad 2.5TDi FE - Grey - Workhorse. 2015 Q3QS SLine - Daytona Grey. Lots of extras! Long Haired Admirals cutter. Previously 2003 C5 A6 1.9TDI FWD - Loaner from D2 Doctor Lifex 1997 S8 - Ming Blue. Loaned out and written off. I loved that car. My first engine swap after cambelt failure. 1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex. 2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on. 1998 1.8T A4 Avant FWD. Ming Blue (there's a theme here), PEX for the 97 S8. And a list of non VAG going back 40 years before I saw the light. |
#3
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yeah bring up measuring blocks in the engine controller and watch the battery voltage
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www.facebook.com/obdworks full genuine ross-tech vcds full genuine vag- tacho full genuine mpps flash mapping |
#4
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Thanks for the quick responce
Vag com is showing these to do with the batt regulator, these have been there before long before the ecu warnings though ------------------------------------------------------------------------------- Address 61: Battery Regul. Labels: 4E0-910-181.lbl Part No SW: 4E0 910 181 C HW: 4E0 915 181 C Component: ENERGIEMANAGER H11 0340 Revision: 00000000 Serial number: 00000000003460 Shop #: WSC 00847 210 56212 VCID: 204A67C68AB1 Part No: 4E0 915 105 A Component: von VA0 390830U0EZ Coding: 34453039313531303541205641303339303833305530455A Shop #: WSC 00468 210 67755 5 Faults Found: 02273 - Quiescent Current Stage 2 000 - - - Intermittent Freeze Frame: Fault Status: 00100000 Fault Priority: 7 Fault Frequency: 8 Mileage: 136992 km Time Indication: 0 Date: 2010.08.27 Time: 18:43:55 02276 - Quiescent Current Stage 5 000 - - - Intermittent Freeze Frame: Fault Status: 00100000 Fault Priority: 7 Fault Frequency: 7 Mileage: 136992 km Time Indication: 0 Date: 2010.08.27 Time: 18:44:04 02274 - Quiescent Current Stage 3 000 - - - Intermittent Freeze Frame: Fault Status: 00100000 Fault Priority: 7 Fault Frequency: 7 Mileage: 136992 km Time Indication: 0 Date: 2010.08.27 Time: 18:44:14 02277 - Quiescent Current Stage 6 000 - - - Intermittent Freeze Frame: Fault Status: 00100000 Fault Priority: 7 Fault Frequency: 7 Mileage: 136992 km Time Indication: 0 Date: 2010.08.27 Time: 18:44:24 02272 - Quiescent Current Stage 1 000 - - - Intermittent Freeze Frame: Fault Status: 00100000 Fault Priority: 7 Fault Frequency: 2 Mileage: 137177 km Time Indication: 0 Date: 2010.09.08 Time: 14:13:36 Im new to VAGCOM so didnt know about the measuring blocks in the engine controller, i will look it up and get the results
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______________________________________________ A8 4.2TDI - Ice Silver, Comfort heated/cooled/massage Seats, Alcantara, Extended Leather pack, Ambient light pack, Solar roof, Night Vision, Lane change assist, Audi presense, Audi BrakeGuard, ACC Cruise, Blinds, Quad Air, AMI, Online services, Parking with rear Camera, Aluminium brushed inlays, Adaptive Zenons, High beam assist, Bose Sound, and more Gone but not forgotten: A8 D3 2005- AMI HDD, Audible Parking, TV, NAV, Bluetooth, Hybrid TV, Aftermarket headrest monitors, Rosstech VCDS / Vagcom |
#5
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just had a look at vag com, im not sure what the relevant fields to use are, any specific instruction to measure voltage
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______________________________________________ A8 4.2TDI - Ice Silver, Comfort heated/cooled/massage Seats, Alcantara, Extended Leather pack, Ambient light pack, Solar roof, Night Vision, Lane change assist, Audi presense, Audi BrakeGuard, ACC Cruise, Blinds, Quad Air, AMI, Online services, Parking with rear Camera, Aluminium brushed inlays, Adaptive Zenons, High beam assist, Bose Sound, and more Gone but not forgotten: A8 D3 2005- AMI HDD, Audible Parking, TV, NAV, Bluetooth, Hybrid TV, Aftermarket headrest monitors, Rosstech VCDS / Vagcom |
#6
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When the engine is running just cycle through the measuring blocks until you find voltage readout.
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Conan (the Librarian) Watch it if you dare Currently, 2000 S8, Merlin Purple, Leather Pack 1, Winter Pack 1, SPAX adjustable suspension, AP Racing 6 pot front caliper, 385mm fully floating disks, EBC Yellow Stuff Pads, Black Diamond grooved rear disks and predetor pads, D2 Doctors Brake Block. 1997 4.2 A8SQ - the Projekt. 12 years and ongoing! 1997 4.2 A8SQ - Ming Blue. Restoration sat waiting; saved from the Scrapyard 2003 C5 Allroad 4.2Q - Cobolt Blue. Towing car. Laid up awaiting manual conversion. 2005 C5 Allroad 2.5TDi FE - Grey - Workhorse. 2015 Q3QS SLine - Daytona Grey. Lots of extras! Long Haired Admirals cutter. Previously 2003 C5 A6 1.9TDI FWD - Loaner from D2 Doctor Lifex 1997 S8 - Ming Blue. Loaned out and written off. I loved that car. My first engine swap after cambelt failure. 1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex. 2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on. 1998 1.8T A4 Avant FWD. Ming Blue (there's a theme here), PEX for the 97 S8. And a list of non VAG going back 40 years before I saw the light. |
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