Schwache Batterien als Ursache für Elektronik-Bugs? | Posts 16+

Hello!

So, I haven't replaced any control units myself yet.
Exception: My father once made a short circuit while installing a radio, which caused a control unit in a Skoda to fail.

Otherwise, it was once an A3, with a short circuit in the fan motor, which drained the battery overnight.
then the electronics started acting up, but it could all be re-learned.

Golf 4, well, the usual starting-up drama, which is common at cold starts, is known.
In winter, at 15° minus, it starts; when it's warm, it's bad; a new battery helped.

And especially spectacular:
Years ago, with my Corrado:
Without any prior warning, I get into the car in the afternoon, during the summer, and want to start the engine.
There was a loud bang, then nothing happened, everything was dead.
Battery explodes, a huge hole in the battery, and half of the engine compartment is ruined with acid.

Hello,

Quote:

should lead to a buildup of electrical and electronic problems in "modern" vehicles as soon as the battery reaches the end of its lifespan, i.e., becomes weaker, and therefore the voltage fluctuations in the on-board network (due to constantly changing loads such as air conditioning fans, electric steering assistance, blowers, etc.) are increasingly poorly buffered.

yes, unfortunately. ABS/ESP shows malfunctions/error entries regarding low voltage in the car's electrical system when the car is very cold and there are many consumers/devices drawing power.
The battery is from 10/2007.

With VCDS, you can learn more about the condition of your vehicle's battery through the battery management system: /viewtopic.php?t=26290

Best regards, Rainer