Facelift Alarm going off randomly - Battery?

[alpesh26]

I am randomly getting my alarm going off but I'm not sure what's causing it. We have CCTV and there are definitely no theft attempts when the alarm goes off. I thought it could be spiders or something setting it off but I don't know if they can set off an ultrasonic alarm?

I did a scan with VCDS and nothing is pointing to the alarm being triggered (e.g. door being opened etc.). I'm thinking it could be the original battery going bad. I checked the terminals directly on the battery with a multimeter this morning (the alarm went off last night) and the voltage was 12.24v. The measuring blocks in module 19 show as below:

IDE00019 Voltage terminal 30 11.5 V
IDE00020 Terminal 15 status Terminal 15 on
IDE01834 Battery voltage 11.687 V
IDE01836 Battery current -15.659 A
IDE01839 Battery charge level 50 %
IDE01842 Usable battery charge 20 Ah
IDE01843 Battery voltage at rest 12.1 V
IDE03256-MAS06106 Battery adaptation-Battery technology EFB
IDE03256-MAS06107 Battery adaptation-Battery manufacturer BA2
IDE04186 Battery terminal recognition connected
IDE07616 Battery degradation for start/stop mode Phase 1

To give some context, I drove the car to work and back yesterday and Tuesday which is a 40 mile round trip. Yesterday, start/stop started to work which to me suggests that the battery has a good state of charge (of course other things can affect start/stop) and was parked up around 7:30pm. The car was connected to a CTEK battery charger on the weekend for about 2 days. The alarm went off at 00:50ish last night. It's done this a few times before and one time it went off during the day for no obvious reason after a 45 mile drive.

The usable battery charge looks low considering its a 69Ah battery. I do have a Thinkware F770 dashcam installed with the cut off voltage set to 12v, so this may not be helping. I've now increased the cut off to 12.2v.

Does anyone have any ideas as to what could be going on? Is my battery dead? I can post the VCDS AutoScan if needed

 

[AlS3BE]

Could be a dodgy door,bonnet, boot switch. Maybe water has got into one of the switches.
I have the same camera set to 12v and no false alarms. Even when my battery died I didn’t get false alarms but yours does show low charge.
does the scan show which sensor was tripped for the alarm to go off?

 

[alpesh26]

does the scan show which sensor was tripped for the alarm to go off?

It doesn't say what caused it to go off which is why I think its the battery.

The AutoScan is below, maybe I have missed something when checking it?

Friday,28,May,2021,10:55:52:00009

Mileage: 64147km-39859mi Repair Order:

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type 8V-AU37 (3Q0)
Scan: 01 02 03 08 09 10 15 16 17 19 22 42 44 47 4B 52 5F 6C A9 BB
BC

VIN: WAUZZZ8V3JA037263 Mileage: 64147km-39859miles

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
22-AWD -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
47-Sound System -- Status: OK 0000
4B-Multifunc. Module -- Status: INTERFACE NOT COMPATIBLE
52-Door Elect, Pass. -- Status: OK 0000
5F-Information Electr. -- Status: Malfunction 0010
6C-Back-up Cam. -- Status: OK 0000
A9-Struct. Borne Sound -- Status: OK 0000
BB-Door Rear Drv -- Status: OK 0000
BC-Door Rear Pass -- Status: OK 0000

-------------------------------------------------------------------------------
Address 01: Engine (J623-DJHA) Labels:. 06K-907-425-V1.clb
Part No SW: 8V0 906 259 J HW: 06K 907 425 B
Component: 2.0l R4 TFSI H13 0003
Revision: --H13---
Coding: 0A2500122426010B2000
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_ECM20TFS0208V0906259J 001005
ROD: EV_ECM20TFS0208V0906259J.rod
VCID: 479DEE1BFEADFDB342-8012

No fault code found.
Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 02: Auto Trans (J743) Labels:. 0BH-927-711.clb
Part No SW: 0GC 300 012 A HW: 0GC 927 711 G
Component: GSG DQ381 H06 1402
Revision: 00H06V07
Coding: 0014
Shop #: WSC 00000 000 00000
ASAM Dataset: EV_TCMDQ381061 001
ROD: EV_TCMDQ381061_VW37.rod
VCID: 2149508330C9E383EC-8074

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104) Labels: 5Q0-907-379-IPB-V1.clb
Part No SW: 8V0 614 517 C HW: 8V0 614 517 C
Component: ESC H25 0621
Revision: 00000000 Serial number: 62317000000418
Coding: 329C938D549C13B08B930B6A4194694CC92AC8D1D082967702415074820812
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_Brake1UDSContiMK100IPB 070001
ROD: EV_Brake1UDSContiMK100IPB_035.rod
VCID: 397998E3B8599B43C4-806C

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (E87) Labels:| 8V0-820-043.clb
Part No SW: 8V0 820 043 Q HW: 8V0 820 043 Q
Component: AC Automat H03 0130
Revision: 20002000 Serial number: 00000001323398
Coding: 03100004000000011000000000001100
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_AirCondiFrontVaAU37X 008022
ROD: EV_AirCondiFrontVaAU37X_008.rod
VCID: 408FF507DB83CA8B83-8014

Humidity sensor: exterior:
Subsystem 1 - Part No SW: 4H0 907 658 B HW: 4H0 907 658 B
Component: AQ_Hum_Sensor H02 0007
Serial number: C9F193C800PAG0MUFU03

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519) Labels:. 5Q0-937-08X-V2.clb
Part No SW: 5Q0 937 084 CP HW: 5Q0 937 084 CF
Component: BCM MQBAB M+ H36 0253
Serial number: 01001723402719
Coding: 000000000000000000000000000000000000000000000000000000000000
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_BCMMQB 018001
ROD: EV_BCMBOSCH_018.rod
VCID: 081F2D27B33332CB8B-805C

Wiper motor control module:
Subsystem 1 - Part No SW: 8V2 955 119 A HW: 8V2 955 119 Labels: 5QX-955-119-V1.CLB
Component: WWS370 170707 043 0580
Serial number: 170724101342
Coding: 0A47F7

Rain/Light Recognition Sensor:
Subsystem 2 - Part No SW: 8U0 955 559 C HW: 8U0 955 559 B Labels: 8U0-955-559.CLB
Component: G397_RLFS H06 0004
Serial number: 62960782
Coding: 00006C

Light switch:
Subsystem 3 - Part No SW: 8V0 941 531 AR HW: 8V0 941 531 AR
Component: E1 - LDS MQB H06 0032
Serial number: 19 04 2017 00001976

Anti-theft alarm system sensor:
Subsystem 4 - Part No SW: 8V0 951 177 HW: 5Q0 951 172
Component: Sensor, DWA 005 0316
Serial number: 000000000ZY172040UHC

Alarm horn:
Subsystem 5 - Part No SW: 5Q0 951 605 A HW: 5Q0 951 605 A
Component: Sirene, DWA 005 0314
Serial number: 00000000000070082720

No fault code found.

-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446) Labels:| 5Q0-919-294.clb
Part No SW: 5QA 919 294 B HW: 5QA 919 294
Component: PDC 8 KanalH07 0044
Serial number: 000308418617223
Coding: 0470051011
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_EPHVA18AU3700000 009035
ROD: EV_EPHVA18AU3700000.rod
VCID: 4B95D22BE2C519D366-801E

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234) Labels:| 5Q0-959-655.clb
Part No SW: 5Q0 959 655 BJ HW: 5Q0 959 655 BJ
Component: AirbagVW21 005 0336
Serial number: 003VWR39CFKN
Coding: 98CCC0000C0000005C5400CA00C800000065
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_AirbaVW20SMEVW37X 002158
ROD: EV_AirbaVW20SMEVW37X_VW37.rod
VCID: 09192823A8394BC394-805C

Crash sensor for side airbag: driver side:
Subsystem 1 - Part No SW: ----------- HW: 480 002 308 17
Component: SideSensor_Df 001 0887
Serial number: 35700000000B203DF62O
Coding: 2D2D2D

Front Passenger's Side Airbag Crash Sensor:
Subsystem 2 - Part No SW: ----------- HW: 480 002 308 17
Component: SideSensor_Pf 001 0887
Serial number: 358000000005942C562I
Coding: 2D2D2D

Rear Side Airbag Crash Sensor (on driver's side):
Subsystem 3 - Part No SW: ----------- HW: 480 401 908 17
Component: SideSensor_Dr 000 6149
Serial number: 3510001AD2645344E32.
Coding: 2D2D2D

Passenger side rear thorax airbag crash sensor:
Subsystem 4 - Part No SW: ----------- HW: 480 401 908 17
Component: SideSensor_Pr 000 6149
Serial number: 3520001AD2645344381V
Coding: 2D2D2D

Crash sensor for front airbag: driver side:
Subsystem 5 - Part No SW: ----------- HW: 480 400 707 17
Component: FrontSensor_D 001 6149
Serial number: 3550002B124F3851625Z
Coding: 2D2D2D

Driver's side crash data pedestrian protection:
Subsystem 6 - Part No SW: ----------- HW: 480 400 908 17
Component: PedP_Sensor_D 000 6149
Serial number: 2280001A125EAC15D279
Coding: 2D2D2D

Passenger's side crash data pedestrian protection:
Subsystem 7 - Part No SW: ----------- HW: 480 400 908 17
Component: PedP_Sensor_P 000 6149
Serial number: 2290001A3268527491C/
Coding: 2D2D2D

Driver's side crash data pedestrian protection 2:
Subsystem 8 - Part No SW: ----------- HW: 480 003 107 17
Component: PedPSensor_D2 001 0887
Serial number: I0M00000000C52BCA62E
Coding: 2D2D2D

Passenger's side crash data pedestrian protection 2:
Subsystem 9 - Part No SW: ----------- HW: 480 003 107 17
Component: PedPSensor_P2 001 0887
Serial number: I0N00000000352BCA626
Coding: 2D2D2D

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel (J527) Labels:| 5Q0-953-549.clb
Part No SW: 8V0 953 521 HB HW: 5Q0 953 549 E
Component: Lenks. Modul 003 0140
Revision: -------- Serial number: 19081704401379
Coding: 2418
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_SMLSKLOMQB 020002
ROD: EV_SMLSKLOMQB_009_AU37.rod
VCID: 0109300390090383CC-8054

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285) Labels:| 5G0-920-XXX-17.clb-SRI2
Part No SW: 8V0 920 790 A HW: 8V0 920 790 A
Component: FBenRDW------ H16 0069
Coding: 24AD08422B8006000101FE001000000000000000
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_DashBoardFPKAU37X 001027
ROD: EV_DashBoardFPKAU37X.rod
VCID: 3A7B87EFBD5F905BCD-806E

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533) Labels:| 3Q0-907-530-V1.clb
Part No SW: 3Q0 907 530 G HW: 3Q0 907 530 C
Component: GW MQB High 433 4303
Revision: -------- Serial number: 0006703024
Coding: 030100043F085A005B00826A3C0B00000001010000000000000000000000
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_GatewNF 013023
ROD: EV_GatewNF_AU37.rod
VCID: 3365AACB9A3561130E-8066

Generator:

Multifunction steering wheel control module:
Subsystem 2 - Part No SW: 8W0 951 523 F HW: 8W0 951 523 F
Component: J453 MFL H04 0002
Serial number: 20170726064214 00712

Battery Monitoring Control Module:
Subsystem 3 - Part No SW: 5Q0 915 181 J HW: 5Q0 915 181 J
Component: J367-BDMConti H03 1050
Serial number: 75886000001708220925

2 Faults Found:
131689 - Rear View Camera System Control Module
U104C 00 [008] - No communication
[New feature! Extended UDS fault detail is only supported by current gen. interfaces]
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 254
Reset counter: 168
Mileage: 62938 km
Date: 2021.03.06
Time: 13:23:00

Terminal 30 power supply: 11.2 V
Terminal 15: OFF

8531970 - Quiescent Current
U1406 00 [008] - Too High
[New feature! Extended UDS fault detail is only supported by current gen. interfaces]
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 7
Fault Frequency: 23
Reset counter: 168
Date: 2000.00.00
Time: 00:00:00

Terminal 30 power supply: 12.0 V
Terminal 15: OFF


-------------------------------------------------------------------------------
Address 22: AWD (J492) Labels:* 0CQ-907-554.clb
Part No SW: 0CQ 907 554 C HW: 0CQ 525 130
Component: Haldex4Motion H52 7756
Serial number: HA1-00030.06.17
Coding: 0001
Shop #: WSC 00000 000 00000
ASAM Dataset: EV_AllWheelContrHA1VW37X 002015
ROD: EV_AllWheelContrHA1VW37X.rod
VCID: 4581E413C4A1EFA3B0-8010

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386) Labels:| 5QX-959-X93-42.clb
Part No SW: 5Q0 959 593 E HW: 5Q0 959 593 B
Component: TSG FS 020 0041
Serial number: 130817EHB26811
Coding: 005F8A205C01040000001002
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_DCUDriveSideEWMAXKLO 006003
ROD: EV_DCUDriveSideEWMAXCONT.rod
VCID: 4385FA0BCA95D1939E-8016

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist (J500) Labels:| 5Q0-909-144.clb
Part No SW: 3Q0 909 144 K HW: 3Q0 909 144 H
Component: EPS_MQB_ZFLS 506 5072
Coding: 8107
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_SteerAssisMQB 013144
ROD: EV_SteerAssisMQB_013.rod
VCID: 3A7B87EFBD5F905BCD-806E

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System (J525) Labels:| 81A-035-466.clb
Part No SW: 81A 035 466 B HW: 81A 035 466
Component: MIB2_amp_P_A3 H10 0440
Revision: 00000001 Serial number: AUZ8ZAH5F00Q7D$
Coding: 0173030000AAAA2AAA0000010000
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_AMPMst16C9Gen2ALPI 001002
ROD: EV_AMPMst16C9Gen2ALPI.rod
VCID: 244759972FDBF6AB87-8070

No fault code found.

-------------------------------------------------------------------------------
Address 4B: Multifunc. Module
Interface not compatible.
Please upgrade to a current Ross-Tech interface.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387) Labels:| 5QX-959-X92-52.clb
Part No SW: 5Q0 959 592 E HW: 5Q0 959 592 B
Component: TSG BFS 020 0041
Serial number: 110817EHA27728
Coding: 005F82205E01040000001002
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_DCUPasseSideEWMAXKLO 006003
ROD: EV_DCUPasseSideEWMAXCONT.rod
VCID: 428BFF0FD58FD89B95-8016

No fault code found.

-------------------------------------------------------------------------------
Address 5F: Information Electr. (J794) Labels:* None
Part No SW: 8V1 035 035 B HW: 8V1 035 035
Component: MU-P-LND-EU 054 1106
Serial number: A698B0J2532926
Coding: 017353010000000011111102000A00332F0027E701700100DE
Shop #: WSC 36224 001 1048576
ASAM Dataset: EV_MUHig6C3Gen2HBAS 001115
ROD: EV_MUHig6C3Gen2HBAS_VW37.rod
VCID: 3169A0C3602953037C-8064

Data carrier:
Subsystem 1 - Part No SW: V03 959 802 TH HW: -----------
Component: ECE 2020 --- 0184
Serial number: --------------------

Multimedia System 1:
Subsystem 2 - Part No SW: 8V0 919 604 C HW: 8V0 919 604 C
Component: DU High H49 0014
Serial number: AUZ8Z9H1Y04WD9

Multimedia system control head:
Subsystem 3 - Part No SW: 8V0 919 614 BJ HW: 8V0 919 614 BJ
Component: ControlUnit_H H85 0855
Serial number: ALJAL117041700010966

Compact disc data bank:
Subsystem 4 - Part No SW: V03 959 800 EG HW: -----------
Component: Gracenote2 --- 1016
Serial number: --------------------

2 Faults Found:
3073 - Cellular Antenna
B1053 13 [009] - Open Circuit
[New feature! Extended UDS fault detail is only supported by current gen. interfaces]
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 4
Fault Frequency: 10
Reset counter: 101
Mileage: 62938 km
Date: 2021.03.06
Time: 13:22:36

Voltage terminal 30: 11.2 V

3084 - GSM antenna 2
B1533 13 [009] - Open Circuit
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 4
Fault Frequency: 1
Reset counter: 7
Mileage: 62938 km
Date: 2021.03.06
Time: 13:22:36

Voltage terminal 30: 11.2 V


-------------------------------------------------------------------------------
Address 6C: Back-up Cam. (J772) Labels:| 5Q0-980-556.clb
Part No SW: 5Q0 980 556 B HW: 5Q0 980 556 B
Component: RVC Compact H12 0231
Coding: 01140601A2002017000040
Shop #: WSC 00078 790 00125
ASAM Dataset: EV_CamSysRVRVCPANAMQBAB 006009
ROD: EV_CamSysRVRVCPANAMQBAB.rod
VCID: 397998E3B8599B43C4-806C

No fault code found.

-------------------------------------------------------------------------------
Address A9: Struct. Borne Sound (J869) Labels: 4H0-907-159.clb
Part No SW: 8V0 907 159 A HW: 4H0 907 159 A
Component: SAS-GEN 2 H07 0001
Serial number: 170803200498
ASAM Dataset: EV_SoundActuaGen2AU64X 003010
ROD: EV_SoundActuaGen2AU64X.rod
VCID: 3E738BFFA177BC7BF1-806A

No fault code found.

-------------------------------------------------------------------------------
Address BB: Door Rear Drv (J388) Labels:* None
Part No SW: 5Q0 959 595 E HW: 5Q0 959 595 B
Component: TSG HFS 020 0041
Serial number: 130717EGD03864
Coding: 000E82204001040000001002
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_DCURearDriveMAXKLO 006003
ROD: EV_DCURearDriveMAXCONT.rod
VCID: 4581E413C4A1EFA3B0-8010

No fault code found.

-------------------------------------------------------------------------------
Address BC: Door Rear Pass (J389) Labels:* None
Part No SW: 5Q0 959 595 E HW: 5Q0 959 595 B
Component: TSG HBFS 020 0041
Serial number: 130717EGC13812
Coding: 000E82204001040000001002
Shop #: WSC 06314 790 00021
ASAM Dataset: EV_DCURearPasseMAXKLO 006003
ROD: EV_DCURearPasseMAXCONT.rod
VCID: 4581E413C4A1EFA3B0-8010

No fault code found.

End-------------------------(Elapsed Time: 04:51)--------------------------

 

[AlS3BE]

How old is the battery? Was told the efb batteries has a lifespan of about 3-4 years and needs replaced. Mine died in a year and replaced under warranty.
don’t know if it’s the same with the audis but previous cars I’ve had if the alarm goes off the first time you unlock the indicators or led flashes and the number of flashes corresponds to what was tripped like door, bonnet etc.

 

[alpesh26]

How old is the battery? Was told the efb batteries has a lifespan of about 3-4 years and needs replaced. Mine died in a year and replaced under warranty.
don’t know if it’s the same with the audis but previous cars I’ve had if the alarm goes off the first time you unlock the indicators or led flashes and the number of flashes corresponds to what was tripped like door, bonnet etc.

It's the original battery so around 3.5 years old. I was thinking of changing it to a Bosch S5 AGM

I have a plan for now: Disconnect the dashcam, fully charge the battery, measure the voltage at the terminals and see if the battery drains considerably to 12v by itself, if it does then its probably kaput, if it doesn't, the dashcam is likely the culprit. I believe a fully charged battery is around 12.5-12.7v

I have a JB4 connected to the OBD port but I can't see that causing battery drain

 

[AlS3BE]

It's the original battery so around 3.5 years old. I was thinking of changing it to a Bosch S5 AGM

I have a plan for now: Disconnect the dashcam, fully charge the battery, measure the voltage at the terminals and see if the battery drains considerably to 12v by itself, if it does then its probably kaput, if it doesn't, the dashcam is likely the culprit. I believe a fully charged battery is around 12.5-12.7v

I have a JB4 connected to the OBD port but I can't see that causing battery drain

mine after a good drive settles around 12.3-4 volts. These new batteries are unlike the old
School lead acid batteries they can have a good state of charge and still be low 12.xx Volts.
think the obd can drain more than you think.

 

[JohnM100]

Battery is on its way out - whether that’s the root cause or not, but likely it is, even with a current drain when car switched off. If you are swapping, then do go AGM as they are a lot better even if a bit more expensive and are better suited to stop/start as well as coping with partial charge.

Bosch and Varta are the same battery with different stickers on them. FL cars don’t need BEM codes, just change the battery serial number, capacity in VCDS and set battery type to ‘fleece’ if you fit an AGM.

You’ll get more info with an updated VCDS cable as yours looks to be previous generation.

When changing the battery, do remove the air box as it makes access much easier. I didn’t and it made a quick 10 min job a lot longer.

 

[AlS3BE]

Battery is on its way out - whether that’s the root cause or not, but likely it is, even with a current drain when car switched off. If you are swapping, then do go AGM as they are a lot better even if a bit more expensive and are better suited to stop/start as well as coping with partial charge.

Bosch and Varta are the same battery with different stickers on them. FL cars don’t need BEM codes, just change the battery serial number, capacity in VCDS and set battery type to ‘fleece’ if you fit an AGM.

You’ll get more info with an updated VCDS cable as yours looks to be previous generation.

When changing the battery, do remove the air box as it makes access much easier. I didn’t and it made a quick 10 min job a lot longer.

Just curious why change it to fleece? Is it better?
On mine there’s an option for agm batteries.

 

[JohnM100]

Good question - it seems those with AGM batteries from factory were coded as fleece. I don’t know why they have separate fleece and AGM options.

 

[AlS3BE]

Good question - it seems those with AGM batteries from factory were coded as fleece. I don’t know why they have separate fleece and AGM options.

done some digging around the interweb and there’s no definitive answer. Some say fleece is a German translation for agm as it’s the material used. Agm coding is meant for binary/bipolar agm batteries which is a different type of battery.
maybe the more knowledgeable on here can weigh in.

 

[alpesh26]

Battery is on its way out - whether that’s the root cause or not, but likely it is, even with a current drain when car switched off. If you are swapping, then do go AGM as they are a lot better even if a bit more expensive and are better suited to stop/start as well as coping with partial charge.

Bosch and Varta are the same battery with different stickers on them. FL cars don’t need BEM codes, just change the battery serial number, capacity in VCDS and set battery type to ‘fleece’ if you fit an AGM.

You’ll get more info with an updated VCDS cable as yours looks to be previous generation.

When changing the battery, do remove the air box as it makes access much easier. I didn’t and it made a quick 10 min job a lot longer.

So far it’s at 12.3v since taking it off charge Friday evening and disconnecting the dashcam. I had to start it a couple times to move it so that’s not helped probably. If it drops to 12v tomorrow then it’s probably on its way out.

 

[AlS3BE]

So far it’s at 12.3v since taking it off charge Friday evening and disconnecting the dashcam. I had to start it a couple times to move it so that’s not helped probably. If it drops to 12v tomorrow then it’s probably on its way out.

Checked mine this morning and it was at 11.6v. Car still started, no warning and charge status was around 50-60%. Think the charge status on these new type batteries is more important than the voltage. My cars just been used to shops and back so not had many long journeys.

 

[JohnM100]

Checked mine this morning and it was at 11.6v. Car still started, no warning and charge status was around 50-60%. Think the charge status on these new type batteries is more important than the voltage. My cars just been used to shops and back so not had many long journeys.

^This

 

[PatC]

I am randomly getting my alarm going off but I'm not sure what's causing it. We have CCTV and there are definitely no theft attempts when the alarm goes off. I thought it could be spiders or something setting it off but I don't know if they can set off an ultrasonic alarm?

I did a scan with VCDS and nothing is pointing to the alarm being triggered (e.g. door being opened etc.). I'm thinking it could be the original battery going bad. I checked the terminals directly on the battery with a multimeter this morning (the alarm went off last night) and the voltage was 12.24v. The measuring blocks in module 19 show as below:

IDE00019 Voltage terminal 30 11.5 V
IDE00020 Terminal 15 status Terminal 15 on
IDE01834 Battery voltage 11.687 V
IDE01836 Battery current -15.659 A
IDE01839 Battery charge level 50 %
IDE01842 Usable battery charge 20 Ah
IDE01843 Battery voltage at rest 12.1 V
IDE03256-MAS06106 Battery adaptation-Battery technology EFB
IDE03256-MAS06107 Battery adaptation-Battery manufacturer BA2
IDE04186 Battery terminal recognition connected
IDE07616 Battery degradation for start/stop mode Phase 1

To give some context, I drove the car to work and back yesterday and Tuesday which is a 40 mile round trip. Yesterday, start/stop started to work which to me suggests that the battery has a good state of charge (of course other things can affect start/stop) and was parked up around 7:30pm. The car was connected to a CTEK battery charger on the weekend for about 2 days. The alarm went off at 00:50ish last night. It's done this a few times before and one time it went off during the day for no obvious reason after a 45 mile drive.

The usable battery charge looks low considering its a 69Ah battery. I do have a Thinkware F770 dashcam installed with the cut off voltage set to 12v, so this may not be helping. I've now increased the cut off to 12.2v.

Does anyone have any ideas as to what could be going on? Is my battery dead? I can post the VCDS AutoScan if needed

I had the same problem with a TTRS. It took AUDI some time to rectify the problem. It turned out to be corrosion around the battery associated with the siren of the alarm. I hope this helps.

 

[Wowitsdan]

Did you ever figure this out? I have the same set up as you and the very same issue.

 

[alpesh26]

Did you ever figure this out? I have the same set up as you and the very same issue.

Yeah, keeping the battery charged stops the alarm going off by itself. The battery itself is still OK so I'm going to sweat it until it fails. I recommend a CTEK charger if you haven't got one already.

 

[Wowitsdan]

Yeah, keeping the battery charged stops the alarm going off by itself. The battery itself is still OK so I'm going to sweat it until it fails. I recommend a CTEK charger if you haven't got one already.

I guess replacing the battery might fix the issue. My battery reads 12.5volts with a multimeter ,but my terminal 30 is around 11.7 using obd