2012 audi A4 battery drain problem.

[Lexas]

Anyone had an issue with battery drain on audi a4 2012. I lock the car, but every minute i can hear clicks in different places ( parking module, amplifier, somewhere under dash, in engine compartment). modules, ecu dont go in sleep mode. Any ideas where to start, please. i get lost...

[QwoleQ]

The car sleeps for a few hours.
Check power consumption after 2 hours.
How big a MMI update in the first place.

[lush29]

Anyone had an issue with battery drain on audi a4 2012. I lock the car, but every minute i can hear clicks in different places ( parking module, amplifier, somewhere under dash, in engine compartment). modules, ecu dont go in sleep mode. Any ideas where to start, please. i get lost...

Any faults?


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[Lexas]

Any faults?


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there was a lot of faults in every module, because battery dies after every night. there is fault in rear right door module, and this door lock doesnt work. i disconnected that door at all, but battery still drains. also air conditioning sensor faulty, but i dont think it can drain batter. i tried disconnect it too. relays clicks in every module every minute.

[Lexas]

The car sleeps for a few hours.
Check power consumption after 2 hours.
How big a MMI update in the first place.

after 2 hours relays keeps clicking... What you mean about MMI update, i dont understand?

[lush29]

there was a lot of faults in every module, because battery dies after every night. there is fault in rear right door module, and this door lock doesnt work. i disconnected that door at all, but battery still drains. also air conditioning sensor faulty, but i dont think it can drain batter. i tried disconnect it too. relays clicks in every module every minute.

Relay clicks in every module??? What do you mean? Thats your problem then... car is looking for something....door lock, can you check drainage?


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[hk06]

when you start the car you chould have 14v in the batterie voltage. that mean the batterie is in charging. unlesse 14v you have to change the alternator

[Lexas]

battery is new, charging ok. I understand that something doesnt lets modules to sleep. but why every module, at least most of them, get some signal every minute, that makes relays click. battery drainage is terrible. after i lock car with remote it stays at 3.30 amps and at the moment of relays click jumps up to 5...

[lush29]

And if you don't lock car is still the same?


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[Lexas]

And if you don't lock car is still the same?


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yes. any idea where can gateway module located on this model?

[MJRVR]

Has this car got Bluetooth?

[Lexas]

Has this car got Bluetooth?

i dont know if car equiped with bluetooth. if so, bluetooth can make this?

[Lexas]

Guys, check video, to see exactly whats going on.

https://youtu.be/1yXe7dRz3dY

https://youtu.be/dg6IT-6UJb8

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[lush29]

Guys, check video, to see exactly whats going on.

https://youtu.be/1yXe7dRz3dY

https://youtu.be/dg6IT-6UJb8

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Pull fuse by fuse and see if drainage stops. When drainage stops go and look on diagram what fuse is that for.


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[Lexas]

Sorted... problem was, led bulbs in car interior lighting, that customer installed himself 😂 After remove led bulbs, relays stops clicking and battery drain drops to 0.01

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