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I noticed that the voltage gauge read above 14 volts on the dash, drove around for 30 minutes, stayed at 14+ volts. Your IP: The ECM issues a generator turn on signal and monitors generator performance through the generator duty cycle signal circuit. Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. If your charging system fails, the most common sign is loss of power. Very well is likely the alternator with an intermittent problem. Depending Locate the battery. 77 Great Deals out of 1,559 listings starting at . It is making a How do I remove 2nd row bench seats in As said, it might occur for several reasons; it could be a problem of low voltage battery, alternator, battery connections, broken wire, and others. The easiest way to check if your alternator is functioning is by running the car and disconnecting the batterys positive terminal. Service battery charging system also indicates that the vehicle cannot travel far before it halts due to a lack of electrical power. #3. 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. Grab ahold of them and wiggle around. If the battery light comes with a temperature light, you should avoid any activity with the vehicle. A charged battery is also more likely to provide a longer battery life because it is more resistant to being discharged. Thread starter ToddEdge; Start date Aug 22, 2013; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. C. Check the alternator belt and make sure it's tight and in good condition. But why wouldnt it be The battery light may be displayed anywhere between 10 seconds to 30 minutes. 2013 Chevrolet Silverado 1500 5.3L 70k. You have replaced a few of these components, but. Then, position the multimeter selector switch towards the DV volt position. Set on volts DC, you should have 13.5-14.5 volts. I have done it so many times now that I can have the cover off in about 10 minutes. 2007 Chevrolet Tahoe TSBs 839 Tahoe Technical Service Bulletins. the battery if when someone jumped Is a 2005 and 2007 chevy tahoe fenders and front On average, your vehicles charging system repairs will cost you between $250 and $1,000 if you have them done by an auto mechanic. service battery and charging system appears and disappears on warning monitor needle comes to discharge and charge and battery lite on dash comes on, new battery same problem. As you are arranging the voltmeters positive lead using the alternator B+ terminal, grind the negative lead. . The other day it came up again. Nope it's plugged in. The BCM indicates there is a system voltage range concern. Besides the warning my headlights, dash lights and interior lights flicker. If anyone has any ideas I'm all ears. For a better experience, please enable JavaScript in your browser before proceeding. For example, you can check your charging system by inspecting the Serpentine belt for probable damage or unfastened issue. I've noticed that when the service charging system warning comes on the voltmeter reads well over 14v. It may not display this or other websites correctly. Service charging system light - Service charging system light keeps coming on even after replacing two new batteries; what could be the problem? So an EPMs first job is to monitor the condition of the battery and select a charging routine that matches it condition. Mark helpful 60 coley8518 answered 8 years ago Likely a diode trio causing that. For example, if the device uses a power cord, the cord may need to be re-configured to allow the device to use the service battery. O. input. Technical Service Bulletins, or TSBs for short, are notifications made directly by Chevrolet to help automotive technicians diagnose and repair commonly reported Tahoe problems. With your Tahoe turned off, you'll connect the negative side of the meter to the negative battery post or wire. If the service battery charging system indicator is on and the alternator or battery is not faulty, the likely cause is a faulty computer system. If you click them and Stays on a few seconds to a minute or 2 and goes off. 2. when i have a battery issue i call around to auto part stores to see who has the equipment to test the battery to determine if the battery is the problem. Trying to fit in 05 Tahoe. battery cables first. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. To gain sufficient time, you can turn off all the electrical accessories that are not being used at that time, like the air conditioner, the heater, the radio, and so on. This may be caused by many possible issues such as a short in the electrical system, a bad grounding connection, a faulty alternator, or a weak battery. New battery. 4 Answers 23,620 oilyspill answered 4 years ago I don't know what testing you have done? Also Read: Car Stutters When Starting (How To Fix). Seems to be a very common problem If the battery isnt charging properly, it may need to be replaced. Content will be removed if CarGurus becomes aware that it violates our policies. about 8 months ago I upgraded the battery from the stock GM one to a bluestar 770cca battery. The generator bat terminal is hot all the time, even with key off. It will target generator output voltage 12.5-13.1 volts. 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. A test can be done to measure the voltage between the battery poles, check the . on who you talk to someone will call it Service battery charging system 40 Answers I have a 2013 Chevy impala it's not holding any power after I have replaced the battery and I also took the alternator out and had it tested which the store rep at auto zone said it was a good alte. Since your car depends on a reliable electricity supply to power all the vehicles electrical parts, the service battery charging system wont be an issue that would be resolved easily over time. . The charging system may have failed or been damaged by road debris. Position your tester towards the OFF area. Thanks for the insight, gang! . morning. Below are some of the reasons why the service battery charging system come on: Often, the alternator is at the root of the service battery charging system indicator. Remember to disconnect Late production 2007 Silverado 1500 with 5.3 engine. Once in this mode, the BCM will set a targeted output voltage between 13.9-15.5 V for about 5 minutes. This system helps to keep the battery healthy and charges it when it is needed. Set the Battery Tester to its ammeter function. You are using an out of date browser. Set on volts DC, you should have 13.5-14.5 volts. It is not advisable to drive with the service battery charging system indicator on, as it could leave you potentially stranded by the roadside. If the batterys charge falls below a certain level, the charging system will activate to bring the battery up to a proper level. What test are they performing? the negative and then the positive 1,500 RPM's. Check the voltage again. Everything appears OK from the outside, what gives? Performing the repair yourself, however, may cost less. Models: 2007 Chevrolet Avalanche, Silverado, Suburban, Tahoe 2007 GMC Sierra, Yukon, Yukon XL with Active Fuel Management System Vortec GEN IV 6.0L V8 Engine (VIN Y -- RPO L76) and HYDRA-MATIC 4L70-E Transmission (RPO M70) This bulletin is being revised to remove the 4L60-E transmission and add condition information. GMs new Electrical Power Management (EPM) system is pretty smart and very fuel efficient. The alternator produces an electrical current to operate accessories and charge up the battery. Then, activate the No-Load Test and Load Test. ENGINE CRANKS BUT WILL NOT START, CHARGING SYSTEM LIGHT ON, SERVICE BATTERY CHARGING SYSTEM MESSAGE . the alternator. To solve your vehicle charging system issue, you should check it yourself, and you should do it the right way as well. Service Hybrid System, or Service Battery Charging System message will appear in the driver information center, the malfunction indicator lamp and red Would love to know the fix. If you are getting a " battery saver active " message, it means that your Suburban's electrical system voltage has dropped to a critical level (less than 11.7 volts). 2023 CarGurus, Inc., All Rights Reserved. It may not display this or other websites correctly. . In older vehicles, there would have been a regulator. So, My 2009 Yukon Denali throws the "service battery charging system" message on a daily basis. I'm guessing alternator but whenever the warning comes up on the dic, I look at the volt meter and everytime it reads just over 14 volts. Thanks in advance. 30 Great Deals out of 504 listings starting at $7,999. Disclaimer: Links on this page pointing Used Ford Explorer. goodness. 1. The BCM will enter Charge Mode when all these conditions are met: Windshield wipers operate for more than 3 seconds. The car is started and charging system output is measured and compared against the factory OEM specification to ensure that the new battery will properly recharge. was to come, Sounds like they did the alternator test that I described. Then follow the diagnostic routine for that code. B. What are the four stages of a Chevrolet service battery charging system? If not then the alternator is the problem. You are using an out of date browser. possibility of it being your voltage regulator, or alternator starting to go. You are using an out of date browser. For proper servicing of the battery charging system, you can take the following steps; Also Read: How To Test An Alternator (3 Best Ways). Spoke with Multiple GM dealers and they have never . A Chevy service battery charging system is responsible for maintaining the battery's charge while the car is being serviced. How much is it to fix the battery charging system? 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. If the battery is weak, it will It can also be used to command the alternator to change its output levels for testing purposes. Once the battery loses its charge, it triggers the voltage regulator to send a message to the alternator to recharge the battery. It could be due to a weak battery, voltage regulator failure, or a bad alternator. Parasitic test done on ALL fuses, I'm told it's either Radio or Cluster? One of the biggest hindrances to the Chevy Tahoe Hybrid's success was simply timing. Occasionally the red battery icon on the dash comes on and in the message center I get "Service Battery Charging System". me off it starts up no problem. 2007 - 2014 Tahoe/Yukon/Escalade Models. You will need to set it if the voltage drops below 12 volts before proceeding. Tomorrow I just 2008 Chevrolet Silverado - 5.3L/4x4/Extended Cab/LT.