When at a idol the battery voltage has 14.6 but as soon as you give it the gas the voltage will start dropping down to 12 volts and below. Normal duty cycle for the current sensor is between 5-95%. You will need to set it if the voltage drops below 12 volts before proceeding. Start with the battery first by load Make a Visual Inspection of the System. I suggested he clean all battery connections, which he did. Get the BEST auto repair information Alldatadiy.com and Eautorepair.net are professional-grade shop manualsperiod. CarComplaints.com: . trickle chargers are the slowest and use the least amount of electricity to recharge a battery. (What is the Difference), What is a Serpentine Belt & When Should You Replace It. I thought it was the battery, so i took it to autzone, were they told me it was no longer a good battery. LTZ. June 29, 2018 at 5:32 pm #1783238. A constant charging system maintains a set voltage, regardless of the amount of power being drawn. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. As you are arranging the voltmeters positive lead using the alternator B+ terminal, grind the negative lead. With the engine off they do not flicker so I want to say the battery is good. an alternator and someone else will Used Ford Explorer. help. RC LEVEL|20x33|NITTO|MAGNAFLOW|HELLWIG|AUTOCAL. What does it mean when my Chevy says service battery charging system? Then, allow the negative battery post to connect with the negative test leads. battery. " service charging system ", means you have an issue with your battery, your alternator, or your voltage regulator. Everything appears OK from the outside, what gives? Add to that the RVC will turn down the charge voltage when it senses high bat temps and than when the bat drops in voltage the RVC system will crank the alt back to max output to bring it back to charged parameters. Your IP: I have done it so many times now that I can have the cover off in about 10 minutes. . The ECM issues a generator turn on signal and monitors generator performance through the generator duty cycle signal circuit. B. . 77 Great Deals out of 1,559 listings starting at . Your mechanic will know better how to test your car batterys strength. It will target generator output voltage 12.5-13.1 volts. Nope it's plugged in. The charging system includes a battery charger, a ground cable, and a power supply. We had this message come up on the console a few weeks back. take it to the mac. definitely fail the test. A forum community dedicated to GMC and Chevy full size owners and enthusiasts. 2007 Chevrolet Tahoe TSBs 839 Tahoe Technical Service Bulletins. Use a test light to check for voltage. If you click them and It may not display this or other websites correctly. You can check the voltage of the battery using a voltmeter. Step 1: Make sure the battery is charged. Now let's get down to how you can do this. Faulty Alternator 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. 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 other day it came up again. You must log in or register to reply here. 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. When something goes wrong with the charging system, the service battery charging system warning will always illuminate. Several cars tend to show service battery charging system in any of the following ways; The charging system helps to keep your battery charged and offers electrical energy for your car radio, lights, and other electrical components when the vehicle is in motion. 01. I just bought a 2014 Chevy Cruze with 30,000 miles. Make sure every electrical component is off. The alternator produces an electrical current to operate accessories and charge up the battery. Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. just a couple of ideas, [SIGPIC][/SIGPIC]11' Silverado CCSB Z71/18x9 DC-2/3" Daystar leveling kit/Flowmaster Super 40/5% Tint. Car Wont Move In Drive (Causes & Solutions). testing it. If there is any, repair them. I had the battery and charging system checked and all are up to specification. Set on volts DC, you should have 13.5-14.5 volts. Ensure that the multimeter clips are in contact with the battery posts rather than the tester clips. Performing the repair yourself, however, may cost less. Ignoring the service battery charging system warning or battery signal light is dangerous. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more! So an EPMs first job is to monitor the condition of the battery and select a charging routine that matches it condition. it looked fine. 2,068 Great Deals out of 51,775 listings . 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. If that turns out ok then hook up a millimeter to the battery while the car is running. Arrange the load control knob towards the right side to enable the ammeter to release up to half of the batterys cold-cranking amps. It depends on the state of charge of the battery. We took it in to the dealer and they said everything was ok. Content will be removed if CarGurus becomes aware that it violates our policies. Disclaimer: Links on this page pointing 10K views 2 months ago Causes and fixes for a Chevy or GMC that has a "service battery charging system" message on the dashboard. Grab ahold of them and wiggle around. This only happens every couple of days or every other. Therefore, a good mechanic should be consulted to avoid further damage or disappointment. These vehicles IMO struggle in the summer time with the huge loads from dual ac/cooling fans at idle. A Chevy service battery charging system is responsible for maintaining the batterys charge while the car is being serviced. Reset the ECU. 4 Answers 23,620 oilyspill answered 4 years ago I don't know what testing you have done? Once in this mode, the BCM will set a targeted output voltage between 13.9-15.5 V for about 5 minutes. If you test the charging system while it is in Fuel Economy Mode using traditional charging system methods, you will falsely determine that the generator is defective. 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. You must log in or register to reply here. be taking it in first thing in the The serp belt may have come off, although that's not too likely since the engine isn't overheating. It was the regulator in the alternator failing. 2012 Chevy Tahoe LT. Depending Seems to be a very common problem Put the car in the NEUTRAL and activate the parking brake. It may not display this or other websites correctly. I have power to the Tahoe however I had a Machine at 1 people found this helpful. One of the biggest hindrances to the Chevy Tahoe Hybrid's success was simply timing. On average, your vehicles charging system repairs will cost you between $250 and $1,000 if you have them done by an auto mechanic. Theres a chance that you left your headlights on or other parts on, draining your battery. If anyone has any ideas I'm all ears. You'll then touch the positive side of the voltmeter to the positive battery wire. Vehicle charging systems provide electrical energy to power your car as youre driving and keep the batterys charge. Started out as a charging system service message and after the voltage dropped to the bottom of the gauge . The most likely causes are the battery, fuel pump, starter, ignition switch, battery cable or a wiring fault. This morning the "Service Charging System" message came on and the battery light - Answered by a verified Chevy Mechanic . chargers with a slow charge mode use the most electricity to recharge a battery and are best for charging a battery over a longer period of time. 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. Pull the hood release under the dashboard and open the hood. Content will be removed if CarGurus becomes aware that it violates our policies. Charging System Analyzer Procedure Park the Chevrolet on level ground. the battery if when someone jumped Update: had the battery and alternator tested at autozone and both passed. The only way to determine if the system is in Fuel Economy Mode (besides observing the criteria), is to view the current mode on a scan tool. To reset the service battery charging system, you will need to reset ECU first. There are a few different ways to fix service battery charging. If the battery isnt charging properly, it may need to be replaced. Spoke with Multiple GM dealers and they have never . With the following step, you can conduct a proper check and service on your vehicles battery charging system yourself, irrespective of the car model. No way it drained the battery that fast? chevroletforum.com > . Also, check if the harness connector that holds the alternator is much secure. It could also be that the alternator has failed to replenish it with new energy. In voltage reduction mode, the ECM targets generator output voltage 13 volts. Good luck. Stays on a few seconds to a minute or 2 and goes off. Yes, the battery cables are corrosion free and securely attached to the battery itself. Locate the battery. This is because the service battery charging system indicator tells you that the car depends on the stored battery power alone to power each of its electronic systems. battery while the car was on. Pricing: ---Eautorepair.net--- 1 month subscription $19.99 per vehicle 1-year subscription $39.99 per vehicle 4-year subscription $59.99 per vehicle ---Alldatadiy.com--- 1-month subscription $19.99 per vehicle 1-year subscription $29.99 per vehicle 3-year subscription $129.99 Which one should YOU choose? to Amazon, eBay and other sites may include affiliate code. make a purchase, we may earn a small commission. The Chevrolet service battery charging system is a system that monitors and charges the service battery when the car is not in use. If I don't start it up at "service Charging System Soon" Question.. 2011 Tahoe LTZ battery goes dead because of intermittent draw on battery. Here are a few things to fix your charging system warning light: A. When doing this, disconnect the battery so no power is available to the wire.