High current draw when ignition is off, drains battery.
#1
High current draw when ignition is off, drains battery.
Car:
02/03 Audi A6 Avant (4B, C5) 1.8 T quattro manual trans.
Problem:
Battery goes flat over night.
Findings:
This list of fault codes looks frightening, but the information panel between the odometer and speedometer says OK. So to the unknowingly, everything seems OK.
02/03 Audi A6 Avant (4B, C5) 1.8 T quattro manual trans.
Problem:
Battery goes flat over night.
Findings:
- Battery voltage at rest, charged: 12.6V
- Alternator Charging voltage: 14.2V
- Current draw (measured via negative battery cable to negative battery terminal) when ignition is off: More than 2A.
- Excess current draw ceases when fuses 15 (Kombigerat, Klimaanlage) and 37 (Telefon, Radio) are pulled.
- When ONLY fuse 15 is pulled, the current increases is a pulsing manner, almost like when engaging the turn signal.I don't know if this is normal behaviour.
Code:
VCDS Version: Release 11.11.5 (x64) Data version: 20121222 Sunday,05,May,2013,10:00:22:39271 Chassis Type: 4B - Audi A6 C5 Scan: 01 02 03 06 08 15 16 17 18 22 34 35 36 37 45 55 56 57 65 67 75 76 77 VIN: WAUZZZ4B83N004654 Mileage: 116150km/72172miles ------------------------------------------------------------------------------- Address 01: Engine Labels: 06B-906-018-AWT.lbl Part No: 4B0 906 018 DC Component: 1.8L R4/5VT G 0001 Coding: 11702 Shop #: WSC 02325 VCID: 65C16926FFF8A130B2A WAUZZZ4B83N004654 AUZ7Z0B2163064 1 Fault Found: 18010 - Power Supply Terminal 30 P1602 - 35-00 - Voltage too Low Readiness: 0000 0000 ------------------------------------------------------------------------------- Address 03: ABS Brakes Labels: 4B0-614-517.lbl Part No: 4B0 614 517 H Component: ABS/ESP allrad 1728 Coding: 06275 Shop #: WSC 00000 VCID: 26432E2AC27E6A287B0 No fault code found. ------------------------------------------------------------------------------- Address 08: Auto HVAC Labels: 4B0-820-043-MY2.lbl Part No: 4B0 820 043 AD Component: A6-Klimavollautomat 0105 Coding: 00000 Shop #: WSC 02325 VCID: 5CB74CC2CCB2E0F81D4 3 Faults Found: 01592 - Air Quality Sensor (G238) 57-00 - Electric Circuit Failure 01317 - Control Module in Instrument Cluster (J285) 49-10 - No Communications - Intermittent 01206 - Signal for Duration of Ignition Off Time 27-00 - Implausible Signal ------------------------------------------------------------------------------- Address 15: Airbags Labels: 4B0-959-655-AI84.lbl Part No: 4B0 959 655 P Component: Airbag 8.4EP 2002 Coding: 0000706 Shop #: WSC 02325 785 00200 VCID: 3D71E14667E8C9F00AA 3 Faults Found: 01044 - Control Module Incorrectly Coded 000 - - - Intermittent 00592 - Seat Belt Switch; Passenger (E25) 000 - - - Intermittent 00532 - Supply Voltage B+ 002 - Lower Limit Exceeded - Intermittent ------------------------------------------------------------------------------- Address 17: Instruments Labels: 4B0-920-xxx-17.lbl Part No: 4B0 920 933 N Component: KOMBI+WEGFAHRS. VDO D11 Coding: 00144 Shop #: WSC 00490 VCID: 2E53D60AEA8E2268830 WAUZZZ4B83N004654 AUZ7Z0B2163064 3 Faults Found: 01300 - Control Module for Navigation with CD-Rom (J401) 49-10 - No Communications - Intermittent 01304 - Radio 49-10 - No Communications - Intermittent 00668 - Supply Voltage Terminal 30 53-10 - Supply Voltage Too Low - Intermittent ------------------------------------------------------------------------------- Address 35: Centr. Locks Labels: 4B0-962-258.lbl Part No: 4B0 962 258 L Component: Zentralverriegelung D37 Coding: 06721 Shop #: WSC 02325 VCID: 326BC27AFEB60688E78 5 Faults Found: 00668 - Supply Voltage Terminal 30 07-10 - Signal too Low - Intermittent 01559 - Drivers Door 58-10 - Can't Lock - Intermittent 01559 - Drivers Door 59-10 - Can't Unlock - Intermittent 01560 - Passenger Door 60-00 - Won't Safe 01559 - Drivers Door 61-10 - Won't De-Safe - Intermittent ------------------------------------------------------------------------------- Address 37: Navigation Labels: 4B0-035-192-RNSD-37.lbl Part No: 4B0 035 192 K Component: RNS 4.2 H06 BNO 0102 VCID: 25412926BF78613072A No fault code found. ------------------------------------------------------------------------------- Address 55: Xenon Range Labels: 4Z7-907-357.lbl Part No: 4Z7 907 357 Component: dynamische LWR D07 Coding: 00050 Shop #: WSC 02325 VCID: 040754A214827838054 1 Fault Found: 00532 - Supply Voltage B+ 07-10 - Signal too Low - Intermittent ------------------------------------------------------------------------------- Address 56: Radio Labels: 4B0-035-192-RNSD-56.lbl Part No: 4B0 035 192 K Component: Radio BNO 0001 Coding: 00207 Shop #: WSC 00490 VCID: 25412926BF78613072A No fault code found. ------------------------------------------------------------------------------- Address 57: TV Tuner Labels: 4D0-919-146.clb Part No: 4D0 919 146 B Component: TV Tuner H08 0805 Coding: 0000010 Shop #: WSC 02325 785 00200 VCID: 285F2012986A7C5849C No fault code found. End ---------------------------------------------------------------------
#2
Follow-up post:
I ended up purchasing a new battery, which I installed 13th of May 2013. I deleted old fault codes and started using the car as normal. After this I have not been able to reproduce the problems as described above. Problem solved, actually. I would never have believed that an old battery would cause these kind of problems, but it seems like this actually was the case. In the future I will be less reluctant to buy a new battery when the car fails with similar symptoms...
I ended up purchasing a new battery, which I installed 13th of May 2013. I deleted old fault codes and started using the car as normal. After this I have not been able to reproduce the problems as described above. Problem solved, actually. I would never have believed that an old battery would cause these kind of problems, but it seems like this actually was the case. In the future I will be less reluctant to buy a new battery when the car fails with similar symptoms...
#3
I had the same thing happen with my 1998 A6 2.8 30v. The battery was draining, tested ok. I thought it might be the hood switch, but then left it at auto parts store for a day to drain and trickle charge, it tested bad. Replaced battery, no further problems.
#4
the same thing keeps happening to my battery it drains over night when the radio fuse is in. I got the battery tested yesterday and they said the battery was good but this morning I went to crank the car to go to work and the car would not start
Thread
Thread Starter
Forum
Replies
Last Post
intergalactic
Audi A4
5
03-05-2012 09:42 AM
compman723
Audi TT
0
06-13-2011 09:59 PM
salinas
General Tech
5
12-11-2007 08:09 PM