[stefsaudi]

Is there any way to prevent the Infotainment system shutting down every 10 mins with the ignition off, I wait in the car for long periods of time sometimes , and I like to listen to music or watch a DVD it is soooo annoying having to turn it back on every time.

 

[john]

Roger will chime in but I think it is set that way to avoid draining the battery. Don't think there is a reset for it.
John

 

[Quatto]

Might be a setting on the back end of the system that allows you to do it, but i'm not sure how to access it. Have you checked the menu options already available?

 

[rnlabas]

Here's my chime - and sorry that it too was at least 10 minutes after you asked. But no, the only way to keep it on is to keep the ignition on - with infotainment systems having so much power these days compared to the past, they SUCK batteries - and you prolly have the expectation to start your car at some point. Many such systems can draw down a battery in less than 30 minutes so...

...and if you do keep your ignition on for 30 minutes, it will prolly throw a DTC (Diagnostic Trouble Code) for the engine-off timer, in case your battery IS discharged and won't start the car. Remember too , that makers are using smaller, lighter (more fuel efficiency driven) batteries that have less CCAs and time-to-discharge capabilities than the past - cuz y'all want them - or at least the results of having them -

 

[stefsaudi]

Thanks for your reply. I used to have an Alpine Navigation head unit in my old car with two amps and a sub, running for over an hour at times and no problems with the battery. Does the Infotainment system suck more power than a system such as that?

 

[rnlabas]

'old car' is prolly the clue - bet you had a battery with about twice the power of today's smaller cars (like the Q3) ... and we have amps that prolly have about the same power as those back then (~2-400 watts - or more - some Audi B&Os have 12-1400) -

 

[rnlabas]

btw, as a rule of thumb - let's say your infotainment system is rated at 400 watts - and you have it cranked up at about 1/3 volume, then it's prolly putting out nearly 300 watts and sucking up perhaps 400 watts. A nominal 12 v car battery will have a rating of perhaps 50Ah - DO NOT confuse this with CCAs which are for a VERY limited rating time of perhaps 3 minutes or so. Anyway, at 400 watts of consumption, you can expect to use up that 50Ah in : 400 watts/12v = 33A, then 50 Ah/33A = 1.5 H. Now that's the simple story. If you are sucking up that kind of current (33A) then it's likely the 50Ah will prolly derate to perhaps 40Ah (and quite likely even less), and the time will be lower [higher loads are NOT directly proportional just as the volume/power draw above isn't either].

Then you must realize that 'other stuff' may be on (blower fans, HVAC vent motors, CEU, etc.) whilst using your infotainment system, so there's more draws too - NET RESULT? You might get an hour, and if you do, yo will NOT be able to start your car and drive off - a pity,but true ...

 

[MPBQ3]

btw, as a rule of thumb - let's say your infotainment system is rated at 400 watts - and you have it cranked up at about 1/3 volume, then it's prolly putting out nearly 300 watts and sucking up perhaps 400 watts. A nominal 12 v car battery will have a rating of perhaps 50Ah - DO NOT confuse this with CCAs which are for a VERY limited rating time of perhaps 3 minutes or so. Anyway, at 400 watts of consumption, you can expect to use up that 50Ah in : 400 watts/12v = 33A, then 50 Ah/33A = 1.5 H. Now that's the simple story. If you are sucking up that kind of current (33A) then it's likely the 50Ah will prolly derate to perhaps 40Ah (and quite likely even less), and the time will be lower [higher loads are NOT directly proportional just as the volume/power draw above isn't either].

Then you must realize that 'other stuff' may be on (blower fans, HVAC vent motors, CEU, etc.) whilst using your infotainment system, so there's more draws too - NET RESULT? You might get an hour, and if you do, yo will NOT be able to start your car and drive off - a pity,but true ...

Roger sure does know his Audi's.

 

[rnlabas]

Thanks - I'm just a geek :nerd: