What is the issue with auxiliary battery failure?
2 Answers
Auxiliary battery failure is mainly caused by battery damage, wiring faults, or control circuit issues. Solutions: First, check the generator's belt and plugs to see if they are loose. Poor contact caused by looseness can be resolved by tightening them. Check if the battery is dead; if so, recharge it. For specific situations, it is recommended to visit a 4S store for professional inspection and determine the repair based on the results. Battery lifespan depends on usage frequency: The longevity of a car remote key mainly depends on how frequently the owner uses it. Like all battery-operated devices, the more it is used, the more power it consumes.
My car has experienced similar issues. The main common reasons for auxiliary battery problems are: severe aging of the battery itself, where capacity declines after several years of use and charging can't keep up with daily demands; secondly, issues with the vehicle's charging system, such as unstable output voltage from the alternator, leading to insufficient charging of the auxiliary battery; then there are loose or corroded wiring connections causing poor contact; and also malfunctioning control modules, which are particularly critical in complex systems like start-stop vehicles. When encountering a fault, the car might display warning lights on the dashboard, and some functions like power windows or automatic start-stop for the air conditioning may fail, affecting driving safety. I recommend taking it to a professional repair shop as soon as possible for inspection, using tools to check if voltage and current are normal. If the battery is aged, simply replace it with a new one, and also regularly check the battery condition during routine maintenance.
