Okay so, I replaced the alternator and this light came on after I replaced it. Bad or loose battery terminals can cause issues even if they look good. How to Diagnose Battery Saver Active. Before we get into the specifics of the charging system and its problems, you may want to look at some of the basic rules for troubleshooting in general, as presented in the beginning of every Haynes manual: Troubleshooting 101. It will be increasingly important for shops to have the tools needed to service the batteries found in these systems as they gain in popularity. It is best to get off the road and get it checked out. These batteries can be damaged if charged using an incompatible battery charger. New comments cannot be posted and votes cannot be cast. If the belt breaks or fails, it will not spin the alternator, which will cause it not to work. 2013 impala service battery charging system. Take them off and examine them to be sure they are good or need to be replaced. 5 volts, the system is charging and working. If the belt is there: 1) check (with the engine off) that the spring loaded tensioner is still functioning, or 2) check that the manual adjusting bolts and mounting bolts are tight. Undercharging/Not Charging.
If you work by process of elimination, starting with the most likely cause and working through to more complex issues, you can easily diagnose the problem yourself. 2009 impala service battery charging system. The simplest way to check this is to use a voltmeter and read the voltage while the vehicle is running. Once the battery is charged and connections are good, test the alternator to be sure it is charging. In addition, shops will need the equipment to properly assess battery condition for the various battery types encountered in these systems. What Is Battery Saver Active?
If you are experiencing dim dashboard lights or headlights, battery charging problems, or frequent light bulb replacements, this may point to a problem with the regulator. As mentioned before, modern cars do their voltage regulation as part of the engine management in the computer. Test the vehicle while running with a meter to see what the volts are. The main causes are the charging system and the current sensor. For instance, our flagship digital tester (Model BA327) will get a facelift later this year which will incorporate not only cosmetic changes but add new Start-Stop batteries to its menu of testable battery types. The 4 Amp 12V/6V switchable WeatherTech Battery Charger is designed to lengthen the life of lead acid batteries through its high performance charging functions. The charging system can be checked with a multi-meter to see if the alternator is putting out more than 13-volts DC. Inspect belt and adjust as required. If the system fails completely for some reason, the battery can provide just enough power to keep everything working properly for at least a handful of miles, but it depends greatly on the vehicle and what electric accessories are running. Overcharging - Battery shows signs of heat damage, fluid leaking, or gives off acidic smell. How to replace battery in 2014 impala. 5-volts while running the charging system is usually good, and there is likely a problem with the sensor. Check the belt and be sure it is tight on the alternator and not loose. Battery Current Sensor.
Internal short in alternator windings. A battery can be put in a charger to see if it holds a charge, or can be taken to an auto parts store which will charge and test it. If your 21st-century car is overcharging, the first thing to check for is a bad connection from the battery or alternator to the computer. After that, fixing it is often easy with the help of your Haynes manual. In many 2-battery systems, the auxiliary battery will be located away from the engine compartment, such as in the trunk or under a rear seat. A broken wire will be obvious, but a wire hanging on by a few strands can wreck havoc too, due to increased resistance. Is it Safe to Drive with a Battery Saver Active Error. Often times the first indication of a problem is headlights that get noticeably brighter when you step on the gas and rev the motor. Often there will be a clicking sound which is the starter trying to get power from the battery to turn the engine on. Manufacturers are expected to use Enhanced Flooded batteries (EFB) in these systems as well, though they are projected to be used in lower cost vehicles, as they are less expensive to manufacture. The test station at the local auto parts store will also reveal bad diodes, as will a multimeter set to AC volts - any reading over 0 means a bad diode. AC noise in the system can cause strange things to happen, confusing the computer and other electronics. If the sensor goes bad or does not have a good connection, it will give an error.
Much has happened since then, when these systems were found primarily in hybrid and luxury vehicles. The voltage regulator controls the amount of voltage produced by the alternator. Lately, especially in vehicles with fuel saving stop/start technology, the alternator/starter is doing double duty or even triple duty: Charging the battery, running accessories while the engine is off, and restarting the car when you step on the gas. Overcharging is much less of an issue these days, but it does still happen. Diodes are a one way valve for electricity, and when working properly convert alternating current (AC) to direct current (DC). The battery charger is easy to use and operate and is engineered to withstand harsh weather conditions as well as short and long-term vehicle storage. Bob R. gave our service a 5 star review on 7/14/2021. The onboard computer (ECM) detects the voltage from the charging system, which is determined by a battery current sensor. Lastly, and this may be hard to believe, but the little warning light on the dashboard can sometimes cause an over charge situation. This allows the vehicle to have more driving time and to get the vehicle off the road. Figuring out the problem and solution is simply the result of having the right knowledge combined with an intelligent, systematic approach. As auto manufacturers add this technology to an increasing array of models, shops will need to be prepared to service Start-Stop systems in all their variations. Much like our earlier posts on troubleshooting clutches, and troubleshooting brakes, there are two basic failure modes in the charging system as well: Either it is working too well and over-charges, or it isn't working well enough and under-charges. It also helps maintain a constant voltage within the charging system.
AGM batteries, in particular, require a specific charging routine with precise control of all charging parameters. I checked the alternator and it's good. The simplest systems connected through the light bulb, and if it blows out, it can cause the regulator to malfunction. If the alternator goes bad and stops charging, it will cause a battery saver active message. Bad connection to regulator/computer. A recently released study by AAA suggests that these systems are proving effective in improving fuel efficiency. On the 2014 Start-Stop equipped Malibu, it is located in the trunk. 5-volts, there is a problem with the alternator charging. So, what do these new systems look like, from a service perspective? The alternator can be tested with a meter while running for voltage. Mechanical faults and internal shorts are hard to see, but often are accompanied by a burned smell.
Read More Product Information. Keep in mind all vehicles have a different operating voltage, with most roughly at 14-volts DC when running. Still on after the battery. So I replaced the battery. No, it is not safe to drive with a "Battery Saver Active" error since the vehicle can break down. GM Genuine Parts 13505369 Battery Current Sensor. Be sure to call around first to see which store one can test it for you. It is critical to have battery charging equipment that can properly service the AGM and Enhanced Flooded batteries that are expected to be the dominant battery types found in these systems. Slipping auxiliary drive belt. This is not always the case, but the message is there since the onboard computer no longer sees the vehicle battery being charged. One of the hardest distinctions to diagnose in the charging system is determining if the battery is starting to go bad, the charging system is under-charging, or there is something draining the battery when the ignition is off. If the vehicle is charging, the current sensor has likely gone bad and needs to be replaced. If your battery appears to have overheated, or is leaking fluid, chances are it has been overcharged, and once the fluid all boils away it won't be able to store electricity any more.
As with charging, each battery type reacts differently to the testing process and it is very important to have testing equipment that is optimized to handle each specific battery type you expect to encounter. The newer your car is, the more complicated the electrical system will be, but the charging system is still fairly straight forward to diagnose and fix. If the voltage is lower than 13-volts DC, there is likely a problem with the charging system. It should not go over 15 volts. Not Charging - revving the engine does not make the lights brighter, or a multimeter shows no increase in voltage output at the battery. High powered sound systems, electric cooling fans, and brighter lighting started putting a strain on alternators back in the 1980s. Twenty-first century vehicles have integrated the voltage regulator into the Engine Control Module (ECM), or Body Control Module (BCM) computer. Navigant Research projects that sales of Start-Stop equipped vehicle sales will grow from an estimated 500, 000 vehicles in the US in 2013 to over 7 million vehicles by 2022. Be sure to look at the belt that drives the alternator as it can break and not spin the unit. If the alternator is not charging, the alternator may be bad, or the belt may have gone failed. If the belt breaks or is thrown off, it will be obvious and the car will likely be overheating from the water pump not turning. Our research indicates that, to date, the most popular battery type deployed in these systems is the AGM battery. Active gift card number for the amount chosen that they can use for future purchases on. Troubleshooting can seem like a mysterious "black art" only practiced by experienced, professional mechanics, when you don't know how certain systems in your car work.
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