In voltage reduction mode, the ECM targets generator output voltage 13 volts. to Amazon, eBay and other sites may include affiliate code. Ben, if your talking about the one that is right there by the cylinder head on the passenger side, it is good and tight, haven't checked it for voltage drop or resistance yet. You are using an out of date browser. "service Charging System Soon" Question.. 2011 Tahoe LTZ battery goes dead because of intermittent draw on battery. Stays on a few seconds to a minute or 2 and goes off. If the voltage is low or the current is high, the battery may not be charging properly. Save my name, email, and website in this browser for the next time I comment. just a couple of ideas, [SIGPIC][/SIGPIC]11' Silverado CCSB Z71/18x9 DC-2/3" Daystar leveling kit/Flowmaster Super 40/5% Tint. So when it comes up with a service battery or service charging system message, it gives you some pretty good information on whats wrong. Set your multimeter to 20volts direct current (DC) and start the vehicle. passes the load test, then Id move to When the service battery charging system light comes on, it means that there is an issue with the charging system, often because the battery has become faulty or the alternator has ceased functioning. Once in this mode, the BCM will set a targeted output voltage between 13.9-15.5 V for about 5 minutes. Your mechanic will know better how to test your car batterys strength. If you have issues with your driving belt to the extent that it prevents the alternator from functioning properly, it can make the service battery charging system indicator come on. The high speed cooling fan, rear defogger and HVAC high speed blower is activated Battery temperature is less than 0C (32F). Therefore, a good mechanic should be consulted to avoid further damage or disappointment. the computer was update also and it still will charge for a liitle while then . Charging System Analyzer Procedure Park the Chevrolet on level ground. Take your car to a mechanic for computer system inspection after every other problem has been checked and rectified. Read full answer. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more! You must log in or register to reply here. The first time it came up it lasted for about 40 mins before it went away. Jun 18, 2016. Remember to disconnect #3. Hasn't come on sense, but maybe it wouldn't have anyway. The BCM and the ECM will send a GMLAN message to the DIC for the SERVICE BATTERY CHARGING SYSTEM message to be displayed. 4 Answers 23,620 oilyspill answered 4 years ago I don't know what testing you have done? Mar 2, 2012. The voltage regulator produces a fixed output voltage, which keeps the system from overloading. Here are the steps to take if you intend to service battery charging system impala for example: Put OFF all electrical accessories Ensure that the car is in the "NEUTRAL" and the parking brake is on. FlexOffers, Cool Automotive Products and Tool Recommendations, Read AUTO REPAIR ARTICLES sorted by topic, What is electronic brake force distribution (EBD), Reduced engine power message on Buick Encore,Chevrolet Trailblazer, Custom Wordpress Website created by Wizzy Wig Web Design, Minneapolis MN. Again, inspect the battery terminals and ensure it is up to 12 volts without loads. Sep 21, 2019. Sep 24, 2014. Thread starter ToddEdge; Start date Aug 22, 2013; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. A Tech2, the computer used by the dealerships for these trucks, can see the health of the battery and alternator. Therefore, you should take it to your mechanic, who can check the alternator voltage. As mentioned earlier, the light is a sign that the alternator has stopped charging the battery, thereby preventing your cars electrical system from acquiring the complete power it desires. . When doing this, disconnect the battery so no power is available to the wire. You can of course buy your own and save a bundle. Set on volts DC, you should have 13.5-14.5 volts. Set the Battery Tester to its ammeter function. Today while sitting parked in my 2012 Chevy Impala LS 83,000 miles, "the service battery charging system", "battery light", and "battery saver active" notifications came on. The indicator light appears in red and shows the BATT anytime a key is in the ignition and the engine is off. For example, you can check your charging system by inspecting the Serpentine belt for probable damage or unfastened issue. The most common sign is displaying a red color icon that stands for a vehicle battery. You must log in or register to reply here. They include wiring diagrams and technical service bulletins. . To solve your vehicle charging system issue, you should check it yourself, and you should do it the right way as well. If the battery light comes on as youre driving in the daytime, it means there is enough time for you to figure out the solution since you arent relying on electrical devices such as headlights. Ignoring the service battery charging system warning or battery signal light is dangerous. He Loveswriting about Automotive Diagnostics and Repair, Trouble codes, Buyer guides for various car parts and accessories, and lots more. This means that the battery is not constantly being topped off and will slowly discharge while the charger is working to recharge the battery. My Tahoe only goes on short 20 min trips to and from work, so I am assuming its not getting a long enough run to charge up the battery. This only happens every couple of days or every other. CarComplaints.com: . Start with the battery first by load Swapping Yukon XL Captain chairs with Seat Rails from 03 Escalade. I check all the cables coming off the battery. Trying to fit in 05 Tahoe. Nope it's plugged in. Normal duty cycle for the current sensor is between 5-95%. Service battery charging system 40 Answers. Service charging system light - Service charging system light keeps coming on even after replacing two new batteries; what could be the problem? The light may appear in red or amber color and show the CHG or ALT icons. The BCM commands sulfation mode if it sees charging voltage dip below 13.2 volts for 45-mins. A few weeks ago my battery light started coming on intermittently while driving. May 28, 2019. Performance of the truck doesn't seem to be hurt in any way however the voltage gauge doesn't stay super consistent while driving. Hello, I can not believe that I've been in here since 2018 and never Posted! Used Chevrolet Tahoe. It could also be that the alternator has failed to replenish it with new energy. Is Unleaded Gas Regular Gas? Posted on Feb 02, 2011 1 Related Answer It is common to go through four to six generators, (aka alternator, but that term is copyrighted by Chrysler), in the life of the vehicle. The battery charging system is integrated into the computer in todays vehicles. I am travelling for one month. JavaScript is disabled. goodness. 2008 CHEVY TAHOE BATTERY DRAIN, THE PAST 8 MONTHS. battery. Heres an example of the correlation between duty cycle and voltage output, 10% 11 V 20% 11.56 V 30% 12.12 V 40% 12.68 V 50% 13.25 V 60% 13.81 V 70% 14.37 V 80% 14.94 V 90% 15.5 V. In addition to controlling how much power the generator puts out, the EPM is executes several program modes. But why wouldnt it be Swapping Yukon XL Captain chairs with Seat Rails from 03 Escalade. well. If youre tracking down a wiring issue, Eautorepair.net is the better choice. Disclaimer: Links on this page pointing http://www.tahoeyukonforum.com/forum/showthread.php?t=63936. 2005 Chevy Tahoe "Charging system failure" 2005 Chevy Tahoe "Charging system failure" By BEEKAY, May 15, 2016 in Electrical-battery- Alternators- Wiring. chevroletforum.com > . Put the car in the NEUTRAL and activate the parking brake. What is the problem with getting aftermarket battery? If anyone has any ideas I'm all ears. The BCM sets a targeted generator output at startup. Shuddering/Grinding Noise Only When Turning Off Engine and Throttle-Oil Pressure - SOLVED. Should I disconnect the battery of my Tahoe This system helps to keep the battery healthy and charges it when it is needed. The charging system will enter a battery sulfation mode which tries to increase the vehicle charging when the charging system voltage is less than 13.2 V for about 30 minutes. If there is any, repair them. I hope this is not something that will cost me a ton of money, plus its only 2years old!! The generator bat terminal is hot all the time, even with key off. Most battery places can test battery and charging system. Another possible result could be dim or flickering light within the cabin or dimmer headlights. I just bought a 2014 Chevy Cruze with 30,000 miles. on the Information Center has started to pop up more frequently now. If I don't start it up at This type of charging system is typically found in appliances such as lamps, radios, and calculators. A ground battery charging system allows the battery to be constantly topped off and will constantly be charging. . I've noticed that when the service charging system warning comes on the voltmeter reads well over 14v. I could go on and on about the system, it does work and i have left it intact, i also install a overdrive pulley on the alt for the summer months to compensate for the extended idleing and dual ac on max that we experience here in the ca desert. Make sure its making good contact. 2007 Chevrolet Tahoe TSBs 839 Tahoe Technical Service Bulletins. Battery sulfation mode is used to help maintain the battery life. It was the regulator in the alternator failing. ( see pic). 77 Great Deals out of 1,559 listings starting at . Thank you souch for your Check battery cables and cabel ends and grounds. make a purchase, we may earn a small commission. Get the BEST auto repair information Alldatadiy.com and Eautorepair.net are professional-grade shop manualsperiod. With both terminals connected, you will ideally look for a figure of around 12.6 volts or more. Thanks. In voltage reduction mode, the ECM targets generator output voltage 13 volts. Battery State of Charge is less than 80 percent. Locate the battery. I had the old battery checked and replaced shortly after I bought the truck a couple of months back since it had trouble starting. definitely fail the test. First make sure that there is no excess corrosion on the battery terminals, and check to make sure it doesn't look like it has been leaking acid. Performance of the truck doesn't seem to be hurt in any way however the voltage gauge doesn't stay super consistent while driving.