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Excessive Battery Drain

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Hello all,

Help needed. Got a 2006 Octavia vRS Petrol. Battery went dead so decided to check the amps when off. I'm getting a reading of 0.68. I waited for 10 minutes and still 0.68. It occasionally dropped down to 0.34 but went straight back up to 0.68/0.69.

I took out a few of the fuses (that ones that matter when the ignition is off) and the only thing that made a slight difference were the windows and Climatronic. These were 0.11 together. The lowest I got the amps was 0.55. Not sure what else to do really. How many more fuses can I test? Has anybody else had issues like this? Do I need to wait longer than 10 minutes?

You advice is very welcome

Cheers!

Marc

  • Author

I've just tried every internal fuse with the ignition on and the only thing of any mention is the front window draw. It's 0.03.

What stereo do you have in the car?

  • Author

Hey,

Just the standard one. 6 CD autochanger.

I'm just in the process of removing each fuse in turn. Done the internal board. Now moving onto the engine fuses.

  • Author

Just got back in. The fuse labelled 'Control Unit for CAN Databus' is where the extra amps are going. When I remove the fuse. It goes to .07 which is ideal. Then it just shuts off. Going to google it now. Will keep you posted.

Yes, more info on your headunit/stereo setup required :)

A VCDS scan would also help in identifying your issue too.

Is it the original battery. I recently paid £160 for the privilage of a new battery for my 2006.

£160 for a battery? What make and model is it??

  • Author

Hi there,

It's now a new battery. As the one that was in it wasn't holding a charge even after 5 minutes. So it had to go. The radio is the original radio that Skoda supplied. SkodaAuto Stream. Although I'm not too sure who the original manufacturer is (phillips, sony etc) The CD autochanger is in the boot above the rear wheel. But this is a new problem and I've had the car for 18 months with no issues.

I stuck my camera in the glove box just to be sure and it does go out. I also jumped in the boot to ensure those lights were going off also.

I started the car a few times today (after 14 hours of being off). The first time the battery went to 9.55volts. Last night it was 10.55v. When I started another 2 random times it went to 10.10v and 11.4. The 9.55 could be a concern, but the other two readings are good. I'm leaving the battery connected tonight again which should technically drain it and prove that there is constant 0.7amps. Again, will keep you posted. Thank you for the help so far.

And £160 for a battery? That is quite steep. My new one is a Bosch S4 and it only cost £82 with a 3 year warranty.

Marc

That was my general line of thinking. I've got a spare (in addition to my original) CAN gateway if the OP gets to that stage of troubleshooting and wants to rule it out.

Another possible could be if a previous owner made a stereo change, replaced the original when selling and didn't revert the gateway coding? Don't know if that's applicable in this case though.

Another possible could be if a previous owner made a stereo change, replaced the original when selling and didn't revert the gateway coding? Don't know if that's applicable in this case though.

From what I recall, the Columbus/battery drain is where the unit doesn't shut down fully when the ignition is switched off. I seem to recall that it appears not to matter what CANbus you have if you've got Stream/MP3, so even if the gateway has the "wrong" coding with a Stream, it shouldn't drain the battery. (Stream doesn't have the components that are kept running to drain the battery.)

Not correct I'm afraid, I know this from experience.

If coding is incorrect for the equipment and module in the car, then there is the possibility that the CANBUS protocol continues to attempt connection to devices, even when not fitted. If the coding is telling the gateway that device is installed, battery drain can occur as the gateway continues to attempt communication.

Ah, I stand corrected then. I thought it was due to the device (Columbus / Bolero) still running.

Think that can be an issue with Columbus, if you have an unsupported CAN gateway revision. But suffice to say, battery drain can make itself known in more than one way :)

I agree with Wardy - an incorrectly coded CAN gateway can cause battery drain issues

Yep it does Mike

I'd agree as well. Sorry, did drift slightly off the original topic but thought it best to provide some additional info :)

In case it's of use...

Octavia II 2.0TD L&K Estate 140PD UK 56 plate

Original Battery: AKUMA 12V 70Ah 340A DIN 570A EN/SAE

Bolero fitted late 2009, no changes made to CAM gateway.

1. Fully charged overnight Tuesday 04-09-12

2. Voltage Wednesday 05-09-12: 12.7V, not used until...

3. Voltage Saturday 08-09-12: 12.6V

4. Battery drain, unlocked, everything off, including MDF: 6.4mA

5. Engine started & stopped

6. Voltage: 12.2V

I came across this topic after having a problem starting last Sunday, she cranked but wouldn't fire.

Charged the battery for a couple of hours, and managed to start her after cranking for 30 seconds.

Understand from other topics that the battery needs to be in a good charge condition to supply enough power to the fuel pump as well as the starter motor.

I only do a couple of 10 mile journeys a week, and in view of the voltage difference between condition 3. and 6. above, I have concluded I need a new battery.

Thought the battery drain of 6.4mA with everything off might be helpful.

Brian - just to be clear, what CAN gateway revision is fitted to your car?

Hi Wardy

This is the gateway info from the VCDS log...

Address 19: CAN Gateway Labels: 1K0-907-530.lbl

Part No SW: 1K0 907 530 K HW: 1K0 907 951

Component: J533__Gateway H04 0020

Revision: H04 02 Serial number: 291006F2000421

Coding: 7D7F47C007002303

Shop #: WSC 73430 790 00000

VCID: 2F66845DBE066D1

No fault code found.

Interestingly. address 56 for the radio shows a fault, '01044 - Control Module Incorrectly Coded'.

This this doesn't seem to cause any problems other that the Bolero display being dim.

What is the correct coding?

Address 56: Radio (J503) Labels: 5M0-035-1xx-56.clb

Part No SW: 1Z0 035 156 F HW: 1Z0 035 156 F

Component: BOLERO 007 0040

Revision: 0A001001 Serial number: SKZ1Z3H3652857

Coding: 050004000201

Shop #: WSC 73430 790 00999

VCID: 356AB6359C5A571

1 Fault Found:

01044 - Control Module Incorrectly Coded

000 - -

Freeze Frame:

Fault Status: 01100000

Fault Priority: 5

Fault Frequency: 1

Reset counter: 207

Mileage: 62831 km

Time Indication: 0

Date: 2000.00.00

Time: 01:35:34

I don't suppose any of this is going to help MarcSmith1983, sorry

Brian

I thought rev K CAN gateways were borderline with Bolero/Columbus?

Is your Bolero coded for Telephone being fitted or MDI? There isn't much you can code on a Bolero.

I had the dim display issue with a Bolero from a 2010 car retro-fitted to a 2006, if you turn the headlights on does the backlight come on?

Hi Andyvee

Bought the car off my brother last year when he upgraded to a scout.

He fitted a bluetooth phone kit which I access through the MDF, and this lowers the media volume on the Bolero when making or receiving calls. Phone volume is also controlled through the Bolero. Of course you know all that :blush:.

Switching the headlights on doesn't make any difference to the backlight level of the Bolero, which is set to bright anyway.

It's difficult to read in daylight, but I've learnt to live with it, but would be nice to resolve unless it requires a new CAN gateway.

Battery drain is low at 6.4mA, so would imagine the the Bolero is not causing a problem for me.

Wardy asked what CAN gateway revision I was on, so posted the info, hope it helps.

Thanks

Edited by Brian Giles

Odd, the problem I had with the Bolero was that the backlight only came on when you turned the headlights on!

As for your incorrect coding, have you checked that the Bolero is coded for Telephone? From memory it works anyway, but if it isn't coded and it has detected the phone kit it will throw up a coding error.

I will have to investigate the Bolero coding requirements for the telephone by looking on the forum, as I don't know what they should be.

I have my brothers VCDS cable once I know what to check/change.

Any tips most welcome.

This is the telephone log entry...

Address 77: Telephone Labels: 5P0-862-335.lbl

Part No SW: 5P0 862 335 C HW: 5P0 862 335 C

Component: FSE_2P5x H24 0100

Revision: 00000001 Serial number: 00000000575487

Coding: 0000422

Shop #: WSC 00000 000 00000

VCID: 336E882D522E491

No fault code found.

Thanks

Edited by Brian Giles

Go to Select Control Module, Audio, Coding then click on long coding helper. Make a note of the coding before you do anything.

Check if any options are enabled that you don't have (MDI, CD Changer?) and check if any are not enabled that you do have (Telephone).

Not much to play about with on a Bolero.

If you haven't changed coding before and aren't sure then have a look here for a general guide

http://octavia-vrs.com/cms/content/enabling-cornering-light-function

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