Jump to Latest Follow 1 - 20 of 26 Posts. The voltage in the battery will drop, which causes the Battery Light to come on. Smart Car Dashboard Warning Lights The 2 seater Smart Car was first introduced in 1998 in the form of the Smart Fortwo. I have a 2016 Honda HRV. But when I got in the car after buying the battery, the light had gone off. An hour later, the car starts up like nothing had ever been wrong. Once the battery light comes on, you have anywhere from 5 to 30 minutes of power left before the battery dies and the car stops working. My Smart car battery is flat can I bump start it? Putting the charger back on the car cause the malfunction warning to appear on the charging screen. If this is the case, pay it no mind. Additionally, the Smart Car service interval indicator system is algorithm-driven, and takes into account the differences between light and extreme driving conditions, load weight, towing, or weather conditions - important variables that affect oil life. Sometimes the battery light will come on when you start your car, but then the light will quickly flick off. Hi. The airbag computer will set a code and turn on the warning light when the system voltage is too high, or too low. What it means: This warning light can have a lot of different meanings depending on which car model you have.In most car models, it says that there is a minor problem with your engine.  Applies to: Answer: Yes, see page 261 of the 450 manual. Discussion Starter â¢ #1 â¢ Dec 29, 2011. If the battery light comes on and stays on while you are driving, the most common cause is a broken alternator belt. I turned the key to start the car and saw what I think was every warning light that car has come on and stayed on. There is a problem with the alternator : The alternator is used to charge the battery and help power the electrical system while the engine is working. I also couldnât get the car back charging. I replaced the battery anyway because it â¦ In some cars, itâs just a warning light that is telling you itâs time for scheduled service (like oil replacement, spark plug replacement, etc. It sounds to me like you have a problem with your alternator. 23 Posts . If you were just making a quick run to the supermarket or are a few minutes away from work, you can probably make it. I brought in my Smart ED with 40% on the battery - as I read somewhere that they would need to perform a full drain and recharge during the battery test. The battery warning light in most cars indicates there is problem with the charging system as a whole, not just the battery. ). I bought a new battery for it. My smart entry dash warning light came on. This is not the case. No engine. Smart ED Car Service Required Warning Light. I am closing in on 10,000 miles and I am now seeing a "wrench" symbol when I first start up the car. Owner Daimler then went on to manufacture a 4 seat variant, the Smart Forfour and later an electric version of the Fortwo and Forfour. Key fob battery did seem to be getting a bit slow. First things first: if the battery light comes on in your car when you turn it on, you probably have nothing to worry about. The battery light indicates a battery charging problem. Total failure of the alternator is another possibility. If this happens, it could be time to contact a mechanic for a battery replacement.