Bmw battery voltage engine off. 5V on my digital multimeter.

• Bmw battery voltage engine off 4V. 6 volts with key OFF, and between 13. 6V when at rest. With the engine off, you should get a reading of 12. That said, if its not been charging, it may be getting discharged anyway. 2 Volts, then it should slowly recover to close to 12. Your test data indicates Voltage in EXCESS of 8. It charges the old battery with lower voltage so if you skip this, the new one will get discharged after a while. A gas-engined car does not run on battery power, except maybe at idle, when the alternator may not be spinning fast enough to generate all the needed power. Personally, I don't believe it does. 3 battery charger to charge the battery when the car isn't driven much (I don't keep it connected, I just charge the battery if the car hasn't been driven for several weeks. The indicator is black on the battery, (bmw OEM batt). 7 volts, but around 12. 2 (alt. Even if the battery is kaput, you can use the float charger to maintain your new battery and extend its life. Keep the trunk and battery compartment open when charging. 5v with the engine idling and ~14. 8 - Battery voltage with engine idling = lower, around 11. 85-12. I would think 13. Also you should slow charge the battery overnight and see if the car will start in the morning. Also, I turned my steering wheel 5 - 10 degrees while the car was off (I was braking to a stop as I was changing into a next lane). 2 volts How do these numbers stand in regards to good numbers? Often, on cold nights I have bad idling. Aug 5, 2018 · 2012-2015 BMW 3-Series and 4-Series Forum I've got a warning message about low voltage battery yesterday while driving on the when turning off the car it Nov 15, 2019 · Battery voltage should be about 12. Therefore, it’s possible that the automobile doesn’t go to sleep properly and instead stays awake when the engine is turned off due to some current drain. 7 volts, indicating the alternator is charging the battery. Use a multimeter to check voltage both with the engine off and while running. Dec 17, 2016 · Measure the voltage across the battery after the engine has been off for a few hours - should be pushing out 12. 9 and results came back as charging system fault. 3v Battery voltage of 12. About 3 minutes after turning the engine off, the battery voltage is 12. If you’re looking to test the car battery voltage, only a few items are needed. My battery voltage is at 12. The battery is close to 3 years old. 6 volts when the engine is off and between 13. Also check for battery Voltage at X13376/21 (Red wire), which is Voltage Supply from F36. 2 volts. If the voltage does not increase, the alternator may be faulty. Nov 13, 2015 · IE during coasting, deceleration, or any other light duty on the motor will raise voltage. All this per Bentley manual. This is known as “resting voltage. Even discounting your jetpack the electronics in a BMW are never truly off, they're always drawing current. 5, i might need to drive it around more for alternator voltage to go up. Jump to Latest 21 - 23 of 23 Posts. You need to run the car for at least 15 minutes. Hooray! A forum community dedicated to BMW owners and enthusiasts. g in the past 2 1/2 weeks it's gone from 12. Feb 17, 2023 · With the engine off, the fully charged car battery voltage will measure 12. 6 but drops very quickly. Voltage readings while the car is running just measures the output of the alternator, not the battery. 5, depending on temperature and operating conditions. In the X3 and 325i It's not unusual to see a voltage drop when starting, because of the draw of the starter. Battery still seems to hold charge well cause i can listen to music with car off and not get any warnings. 6v on a cold start on my multimeter. 95-12. I take random readings with voltmeter— and have to occasionally top it off with the CTEK. Made sense in my head at least: engine running alternator charging battery at higher voltage, engine off ECUs feeding off the battery and lower voltage. Car starts up with no problem. 5V on my digital multimeter. Should be between 13. There SHOULD be Battery Voltage (UN-switched KL 30 voltage) at X13376/34 (Red/Blue wire). 5 volts. What's more of a concern is the 12v reading in the morning. 9V when it’s completely discharged. Start the engine and check again; the voltage should rise to between 13. With the ignition on, engine off, I'd SWAG the car is drawing between 20 & 30A. " I checked battery with load test- ok, check voltage on dash before starting engine and while cranking engine- never goes below 12V, maybe once went to Apr 10, 2020 · The car is my 2008 bmw 328i, love the car. 5 volts DC. 2 and 14. is new valeo). I think we need a real "mechanic" to confirm a weak battery affects engine performance. If your car does not have a weak or dead battery, then this is not the cause of your Start-Stop issues. But regardless of that you will have to reset the battery in the car's computer. 0v So I figured the alternator was cutting out. When key is in position 1 the battery indicator is faint (not bright). Its just it only stays at a steady voltage for about 3 to 5 minutes (11. 01 volts Car on no accessories on at battery - 13. Oct 23, 2016 · I checked the voltage on the E39’s battery and found that it was pretty run down, less than 12 volts. 2v (after 48hrs of ctek magic), during the cranking voltage drops bellow 10v, after it stabilizes alternator kicks in and voltage goes to 14. With the engine off, you are reading battery voltage. How to Test the Battery Voltage in Your Car. Sep 4, 2012 · My wife's X3 is getting the "Battery discharging while stopped" message. Jul 15, 2012 · Well, i went ahead and replaced the alternator, checked OBC for voltage. So a battery with a 100 A-hr capacity would be somewhere between the C/5 (20A) and C/3 (33A) curves. i get a jump from my May 12, 2009 · - Battery voltage with engine off = 11. 0 volts or better with engine OFF, and 14. You need a clean source of power for programming, especially if it's a long session, and running off another car isn't the best way to provide that. 9. Your BMW Engine Temperature Must be in Operating Temperature: Step 4: Start the engine and read the battery voltage once more. 5 would be a more normal/healthy range. Nov 16, 2017 · The battery you bought may not be fully charged. Is it the battery getting old/bad? charging voltage ensures a better battery charge balance. 18v. That is per SIB 120405. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Jan 5, 2011 · What's considered a normal battery voltage with the engine/alternator off? In all three of our BMWs, the voltage is approx. It has treated me good for about 2 years now, I got the car at 119000 miles its currently at 130000 miles. A fully charged battery is 13. Over the past week that I have been monitoring the voltage, My running voltage has not be at 14 or higher for 3 days. Should be at least 11. ) Nov 24, 2022 · The battery voltage drops steadily from about 12. 3V (engine off) indicates a low state of charge; it should be closer to 12. 5. Nov 13, 2024 · The battery itself could be the culprit if you are experiencing voltage problems. Under load would mean adding things like stereo, AC fan, engine fan (120W), headlights, etc and those loads tend to lower the voltage you'll read across the terminals. Jul 5, 2019 · the voltage youre seeing at the cluster isnt off for your car, given wire gauges connections etc to the source of the wiring a drop of . no? Battery is most likely a couple years old, but had it tested at autozone and it said good battery. About 2 months ago I also got the message battery running low when I was listening music with the engine turned off. Dec 14, 2017 · A car runs fine on a dead, jump started battery. 11,7-11,8 V based on the Board Computer. A jump start Jul 27, 2012 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Jan 27, 2021 · What is the voltage with the engine off? Pre-BMW Whackjob (2014): 1977 Monte Carlo, 1966 Chevy, 1986 Monte Carlo SS, 1978 Caprice Classic, 1992 Camaro RS, 1984 Aug 19, 2022 · With the car off, there is no static connection between the charging terminal and the aux battery terminal, with the hood either open or closed. Yesterday, after back from work and letting the car rest for about 30mins, I re-checked the battery standing voltage and it was 12. The battery needs to provide at least 12 volts. 4 - Battery indicator is black (insufficiently charged) - 2001 530i with 95k miles - Battery's voltage was already on the low side a few months ago (~12. 3 V) My questions are: 1) Is the alternator on the E39 a known culprit for failure? Jan 22, 2021 · The car idles fine but it just start to stall when putting the gear in drive and RPM go up. Literally ran an energy diag on a car yesterday and it was charging at 14. Apr 25, 2022 · The voltage should be in the range >= 13. 5 volts then the idle rpm dropped and so did the voltageto 12. 6 volts when the car is off. Apr 16, 2021 · So my Car is at BMW for 2 Recalls One is: Battery Cable Insulated Bulkhead Connector I don't know if all BMW Dealerships do this now but I received a video link to my phone from the Technician that does a walk around on my vehicle. The replacement is a stock Duralast AGM battery H8-AGM 95amp 1000CCA with a 3yr warranty. Oct 2, 2022 · I would suggest to FIRST check for Voltage at Pin #34 of Connector X13376 at the CAS Module. 97v. 4-12. i go to the trunk and check the voltage on the battery with a dmm and its 11. I was pissed, so i took the battery out of my e36 m3, and put it in my car, all went well, car is working well now and the voltage for alternator was running around 13 and battery around 12. 5v (engine off). The car likes to draw from it more than charge it. the light will come on and then go out when the computer is satisfied voltage seems OK. I use a CTEK MUS4. 0 to 12. See it all the time. 6V with the car off. 3VDC is normal on the test reading. Come join the May 4, 2011 · Car sits at around 13V idle and 14V driving on the freeway. 1 2. 5 years old. This is with all the electrics on, key position II, and the vehicle not started for at least one day. 5 volts, for 30 minutes AFTER Ignition off. 5V, the Pump speed increases. last night i left my hazards on for roughly 15 minutes, when i returned and tried to start the car, it was a no go. 7 on a good battery. If you measure the voltage right at the alternator with most power consumers off and it is below these values then my bet would be that the alternator is not working properly. 6 volt open Mar 5, 2018 · Measured the voltage on the battery and it said 11. Jul 11, 2021 · I got an E90 with 140k miles. 4 volts. Check Battery Voltage. 8V is indication of need for Voltage Regulator replacement. 5V vs. 7V off and 13. I try to get it to around 12. Engine running charging voltage 14. Battery voltage is like 12. You should consider getting a battery float charger to see if you can get your current battery back up to a full charge. Alternator is new so I am sure it is charging the battery. battery drops to 11v. What doesn't make sense, is when the car is at 0 MPH and idling, the voltage is 14. Mar 7, 2021 · Yesterday while driving to and from work the battery light kept flashing and the voltage would drop as low as 9. Jan 6, 2011 · Better to test at 27°C/80°F by loading battery with 15 amperes for 1 minute (or just turn headlights on w/o engine running) and then perform a 1. May 25, 2023 · With the engine off, the fully charged car battery voltage will measure 12. This is also known as a multimeter. All that needed to be replaced was the battery, but 15 V is out of spec for bmw. Jan 12, 2017 · Seems like the car battery dies within less than 5 mins of having the car on (engine off), what does that mean? After the jump, I drove home (about 10-15mins) and am still able to restart the car with no problemno "Increased Battery Discharge" these 2 days. Normal battery voltage should be close to 12. TESTING/RESEARCH: That night I checked the battery voltage. Feb 15, 2015 · When I measured the voltage on my original BMW battery it was at 12. 2017 328d xDrive Sports Wagon: Estoril Blue, Black Sensatec, M-Sport Pkg May 28, 2023 · The ideal car battery voltage with the engine running is between 13. If the battery isn’t fully charged, it will diminish to 12. XBimmers | BMW X3 Forum • BMW X3 and X4 Forums | F25 (2011 - 2017) | F26 (2014 - 2017) • Second Generation BMW X3 (F25) General Forum • Min. yes i've got a trickle charger and i've brought the battery to full charge or close enough to fully operate the car. An item known as a digital voltmeter will be needed, but an analog voltmeter can be used, too. 7 - 14. 0V. You may check the battery’s output voltage while trying to start the engine. Especially when applying the brakes. By the time you see a voltage drop on your meter your battery is already drain too much to start the car Jan 2, 2019 · With a voltmeter in the auxiliary power port below the center of the dashboard for over 2 years, I've watched the voltage drop to as low as 11. Car accelerating, alternator fully disengaged, thus 13. When the engine is running, the battery voltage is 14. Jan 25, 2012 · The standing voltage after full re-charge was 12. 5 to 14. If you do get it running check the voltage again across the battery terminals. Its an exact match to the stock BMW battery all the factory clips/mounts fit perfectly. Also checked with the OBD menu and got the same reading. 2v after charging all nite. Take it to the dealer or get the software and cable and do it yourself. With the car running the voltage should read over 14 volts. * Today i got a new battery and i was under the impression that with engine off voltage should be 12. 5 volts to 14. Battery should be 12. An old battery may have faulty cells or no longer hold a charge. Car coasting or braking, alternator is fully engaged, thus 14. 6V, immediately after hooking it up in my car, the standing voltage dropped to 12. This tells the car that the battery is new, & to adjust for the proper charging cycle. Apr 4, 2014 · THE CAR: 2011 BMW 328i with X-Drive. 265 specific-gravity hydrometer test of each of the six cells (add or subtract 0. 7V when engine is at 1,500 rpm. You can connect a charger whilst the battery is in the car. 61 at the battery while the car is on. 34 at the battery while car is off (dead battery), 12. 7V. start engine" in the cluster. It's important to understand that the IBS monitors battery voltage even when the car is "asleep". It should be in the vicinity of 13v. 90v after the surface voltage fades BMW Battery Health. I got into the hidden menu to read the voltage while the car once started (15. Bought in Jan '14 with 55k. Alternator is charging (measured 14. At Bimmerforums, you will find technical how-to information maintenance specifics audio advice wheel and tire combinations and model specific details not found anywhere else. Jul 27, 2012 · Also, the voltage should be tested with the engine off and the surface charge eliminated. 5v to 13. May 12, 2023 · With the engine off, the fully charged car battery voltage will measure 12. The dash lights up like a Christmas tree (4x4, ABS, Airbag, Yellow brake light, Red Brake light when engine stalls, Red Battery light when engine stalls, Gear with exclamation point, sometimes EML) Question: Can a bad battery cause most of those codes? Spend 10 seconds on Google or work for bmw. Started the car, the running voltage spiked to 14, 14. Old batteries won't hold a full charge. Then monitor your alternator output with the engine running, test#9. 4V, took the battery May 29, 2016 · See the attached image for the discharge voltage characteristics of a so called "typical" battery. 6 Volts after the headlights have been turned off for close to 10 You need to check the battery voltage with the engine off and with the engine running. The most important condition that needs to be met is a good battery condition and voltage. 32V <-- measured voltage at engine start Oct 10, 2016 · I've been coming out to a dead battery way too often. 4v. Modern Battery Management Systems never fully charge a battery as battery life is extended if it is kept at 80-85% charged, which is about 12. View attachment 838309 View attachment 838311 I am hoping that this is only due to the temperatures since it has not been above 15*F since we got it and it is -12*F now. 4 volts won’t always be able to supply enough electricity to start the automobile. 7. This a "Sanity-check" since INPA showed voltage from that fuse (KL30L). 100 amp load for 10 sec. When I start the car (hood up), the aux battery starts charging from the alternator, with 14. 4v Feb 6, 2024 · The main signs of a bad battery on your BMW are the following: No or fewer lights lighting up on the dashboard; Dimming of dashboard lights while cranking; No radio turning on; No noise coming from the car; A healthy BMW battery should read around 12. Jan 29, 2015 · welp I've determined it's the alternator. 8V. 9 volts Car on all accessories on (brights, heater, a/c, radio) at battery - 11. 3 to 12. the codes that appear for my car is 90{144} battery voltage open circuit in red but it states shadow, 3b[059]interior light short circuit red fault currently present,0f[015] power on reset red and currently present, bf[191] internal fault eefrom checksum coding Feb 9, 2015 · That low of voltage, will make the engine run with a miss. A fully charged battery should provide around 12. If the drop during starting is significant (below 10V), it indicates that the battery is weak. May 21, 2023 · With the engine off, the fully charged car battery voltage will measure 12. Voltage with car off would drop to 11. 7-14. Battery was replaced a few months ago. When the car was warm, the voltage was all This weekend I tried this: left the ctek charger on, enter into the car, turned off every electrical switch (lights, AC, radio) but entered in the CIC option to monitor battery voltage. BMW battery, you Apr 5, 2014 · Here's a huge writeup from the WDS on bmw-planet alternators in our cars are way smarter than a fixed voltage regulator module inside the alternator. Apr 2, 2014 · With the engine on, you are essentially reading alternator output voltage. If running voltage is low (less than 13VDC) you may have other charging issues and your battery isn't being charged. Plus, it's putting a lot of load on the other car, as I've seen close to 40-50a peak draws when programming. A couple of days ago, I noticed the clock has been reset, along with other things, but the car started fine. I have a 2013 BMW X1 (original owner and luckily haven't had too many issue yet). 6 volts. 5 VDC running - your battery may be gasping it's last volt. Nearer 12 is poorly, anything below 12 is dead. It's not unusual to see a voltage drop when starting, because of the draw of the starter. 6 volt charge when the car is off, however, that may drop considerably while cranking the engine over if it's weak. However, if Steuern/ Activations will NOT allow you to control alternator output, I would expect you have a problem in the BSD bus that is used to control alternator output. Running the car for just a few minutes doesn't charge it up enough to make itworth starting the car. ” When the engine is running, battery voltage will typically rise to 13. How old is the battery? You are correct that a fully-charged 12v battery should read around 12. 5, and battery at 11. Sep 2, 2005 · Car off all accessories off volt at battery - 13. Inspect Battery Cables and Terminals What should the voltage be on my BMW battery? Verify the voltage reading. 61 at the b+ terminal while the car is on, 12. Voltage with car on would hover between 12. 7 and 14. 7 v. So I started monitoring voltage with MHD. If the voltage drops below 10 volts, your battery won’t have enough charge, making it difficult to start the automobile. Start the car and recheck the voltage. 5 volts appearing at its terminals. Mar 3, 2011 · Yes. 5 and 14. battery terminal OR other assumption is that both i3 and Gas car are adjusting voltage to 12V at cigarette lighter socket. The specified voltage is dependent on: • The battery temperature • The current consumption of the vehicle. Sep 5, 2015 · Most cars have a proper charging Voltage of around 13. After the car is off for a while it winds down the parasitic draw and it goes up to 12. 5–12. Jan 16, 2021 · The IBS provides the DME information both while the vehicle is "on" and "off". May 13, 2019 · During the winter months I often charge my battery to ensure it is in good working order. 2V after few hours from turning car off, car is just 2 years old. The car computer controls charging, and measures battery voltage using the IBS right at the battery. 5+, the battery is dying. Battery Voltage Google Search Search Forums Jan 30, 2019 · I have been seeing a message after turning the engine off that says "battery discharged. Is this normal? The reading is from my cigarette socket phone charger with a voltage display. 45 volts and hitting the Start button cranks the engine with vigor and it starts right up. 9-ish. BMW does describe the theory of operation, and will bore most in detail, but essentially collects up to 5 days of battery charge status data, as "charge state histogram". 5V to 8. Another quick inspection technique - look for the battery age. Procure a set of safety goggles and rubber gloves for protection. at least there's not a faulty connection somewhere I need to track down. 6v, but that’s OPEN circuit voltage, and assumes the battery was charged and then left to sit at room temp for a period of time to dissipate the surface charge. It has an OEM 80 ah AGM battery which is about 4. May 1, 2016 · I drove out in the E39 with a freshly-charged battery in the trunk. Oct 15, 2020 · Generally, if the Violet wire at X6035/3 voltage goes UP in its NORMAL range of 7. tested voltages with a multimeter and got: 12. A 12 volt battery with a charger putting out even 18 volts will read 12volts when connected to a load. Appeared within a few minutes after shutting down the engine. Higher than 14. The "C" in the labels is the Amp-hr rating of the battery. i hear click click click and the fuel pump start up but no start :( . Certified Preowned. Also, Pin #1 Voltage, which is B+, Terminal 30, Battery Voltage, goes UP from 12. 9 V before the DC-DC converter turns on after a few seconds even when the 12 V battery's resting voltage is >12. After a good drive (key in ignition/engine off) battery reads 12. It stores electrical energy and supplies power to start the engine, operate various electrical systems, and support electronic components in modern BMWs. 375 volts) and then the voltage just drops and drops until the car eventually stalls out and the lights on the dash go out even the back orange lights behind the dash. Having similar issue, 12. 6V, indicating that the alternator wasn’t charging the battery. Something is wrong because leaving the key in the ignition for an hour should not kill a healthy battery. With engine running, the circuit measurement should be 13. Then it would shut off after immediately turning the car off. Jun 3, 2012 · Once hooked up to a load (the battery) the battery will then dictate the system voltage. Feb 14, 2012 · It should be a little over twelve volts with the car off. I installed the charged battery, started the car, did the charging-system basic health test, and found that with the engine running, the battery voltage stayed at 12. If the voltage is not 12. A jump or a charge and i can drive my 2002 like normal. 4 while engine on is 13-14 but as im drving it stays at 12. Jun 2, 2023 · M140i, march 2017, original battery. 5 V (all verified by measuring the voltage at the 12 V battery terminals). If it does not then you need an alternator. Apr 29, 2019 · As the stock battery was from 2011 and it was dying very fast so I got a new battery from BMW dealership, I replaced it successfully but when i received brand new battery from BMW, I measured its voltage while it was not connected to car in any way, and the battery volts were 12. In this scenario the voltage across the battery will gradually rise until it's fully charged. Measure the voltage after an overnight charge, and 1 hour after disconnecting the charger. Not more than 12. Alternator read at 11. 35 volts indicating the charging system is working. 7 volts when the car is running. Doing regular daily commute of totally ~1-1. It should drop a little and then increase to around 14V. Take the old battery to the store to get a $15 discount. Keep in mind a poor mans battery load test is to turn the headlights on for 2 minutes and make sure the battery Voltage does not drop below 12. 7V with engine running, then the alternator IS charging. Cig lighter is OFF Accessories ON - 12. 6V. 7 to 12. You should never remove a battery and then try to start a car directly off a charger even if charger is very large and can put out enough amps to start a car. Your BMW’s battery must be in good condition and have sufficient voltage. The alternator is a key piece of equipment on a BMW. car off: 12. 2 volts so I charged it up for a few hours and started the car and everything seemed fine again. Dec 15, 2008 · I have a 1999 540i, it died on the road, bad alternator/battery, replaced both but the battery indicator still flickers. A healthy battery should read around 12. I had issues with the internal voltage regulator on one of those 85 amp Ebay alternators that are a direct replacement for your 2002 alternator. This is because the alternator provides additional voltage to power the car's electrical systems and recharge the battery. Do not measure just after switching the engine off, as the residual charge will give you a false measurement. . If there is a large dump in the car or there is a large current demand, voltage will rise. Jul 27, 2018 · My car randomly shut off in the middle of the road***8230; >snip< I checked the battery voltage as I was driving to the dealer, and it was a solid 14+. While I was measuring the voltage at the battery with the car running it was 14. 3, 11. May 7, 2010 · Correct Battery Voltage with Engine Off. 1V. If the battery voltage goes below about 11V. 1-13. 2V is an indication of the battery that is '50% discharged' a fully charged battery should read closer to 12. How can I tell if the battery in my BMW is low? The engine either struggles to crank and start or won’t crank Aug 17, 2011 · Use your car like you said then use the battery pack if you drain the car battery. Before cracking: 12. 15 means most likely the battery is pooched. Cig lighter shows 12V Cig lighter appears to be under reporting by 0. 5hr of suburban/urban driving to work and back. Google DIY car power supply. Jan 5, 2012 · For couple of months i had problem with electronics and battery. Feb 29, 2020 · I'm getting 11. 2 when over 1000 rpm. Nov 16, 2010 · Thank"s for your reply StuartJohn24. In the video the BMW tech states that my Battery is failing and Oct 31, 2014 · The way to charge a flat battery is to apply a constant current to it - the rule of thumb being 1/10th of the capacity of the battery. Battery voltage engine off 12. 5-14. if you wish to test the alternator, start the car, turn headlights on hi beam, A/C fan to full speed, rear window defroster on, A/C on, and read the battery terminal voltage Dec 29, 2017 · If car-off battery voltage is less than 12VDC and then jumps to 13. Outside that range indicates issues. I was driving down the road at about 30 mph when i noticed the yellow brake light come on followed by the abs and then the triangle for traction control came up, im sure there is a couple im leaving out like messages in the dash menu. This means, in the case of a 110A/hr battery, that you will limit the current of your charger to 11 amps. Apr 21, 2019 · SOC 100% - 12. 91V <-- voltage with engine and ignition off, at battery terminal State of health 100% 1035 CCA <-- above the spec'ed 900CCA and 1000A cranking amperage cranking health 100% 10. May 2, 2010 · That voltage, with no load, is for a nearly discharged battery. 4V at 75%, 12V when it’s only operating at 25%, and down to 11. Jun 13, 2013 · Monitor test #9 and monitor your battery voltage with the engine off. 0v) and Oct 25, 2024 · Set the multimeter to voltage reading and connect the multimeter test probes to the battery terminals (red to positive, black to negative) under the hood while the engine is off. Would this have damaged steering pump or steering rack? Aug 19, 2020 · With engine off, the battery voltage of 12. 5 Volts at idle or fast idle (1500-2000 RPM) with a small to full load. The DME in this car will vary voltage to extend battery life as well. If it detects the battery is topped off, the DME will slow the charge rate to prevent over Sep 16, 2011 · The battery should hold a 12. 86v to 12. Feb 26, 2024 · With the engine off, use a voltmeter to check the battery voltage. Turn on the ignition; the battery voltage should remain over 12 volts. It should be about 12. 5 volts with engine runningThe regulated voltage (engine running, battery charged, accessories and lights OFF) is usually between 13. 42V at battery terminals. Jul 10, 2018 · If INPA shows battery voltage of 12. It powers the engine, charges the battery while driving, and provides electricity for various systems. It could be time to replace your automobile battery if the reading falls below this range. I would measure your battery voltage while the engine is off, just to make sure it is above 12 volts? If you have to replace the battery, it must be registered to the car. Yesterday, getting back to the car after about 6 hours of getting somewhere, the car was completely dead. No any issues so far, but wondering when temps go into -10C or lower in month or two, will the car start with such low There is a chance that a battery with a value of more than 12. With ignition off if you have a lights or radio on after 2 min warning goes on "recharge battery" "battery is heavy discharged. The battery charging voltage is controlled as a function of . 4 with the engine off. Your BMW’s battery plays a vital role in your vehicle’s electrical system. 004 to the hydrometer reading for every 10°F/6°C above or below 27°C/80°F respectively); and a 12. I replaced the battery in August and reset the battery counter, whilst it does hold out better it's still significantly discharging, e. Always comfort mode, start-stop deactivated. I have been making short trips, five to seven miles lately. I dropped the battery into Kugel, and with some coaxing, the car started up. The brains will store a code if there's a fault that causes overvoltage (among other reasons). But, when running the voltage never geta above 14. One of the basic electrical checkups you can do in a car is to use a multimeter to measure the resting voltage—the voltage across the battery terminals with the car off. 25 @ battery terminals w/DMM) battery voltage is 12. After changing with a CTEK charger I sometimes measure the voltage. The last 4 months I haven't been driving that much as I'm used to, I only did a few trips a month. 0v. Fixing a faulty alternator Apr 14, 2018 · I replaced the battery and now the code is in yellow/ fault currently not present. 55V at battery terminals. With the engine off, a fully charged battery should have ~12. However, with the engine running, this should increase to between Jul 12, 2018 · In Gas car, Accessories OFF - 12. Nov 3, 2010 · The car is a 99 528iThis is now day 2 where my car has either had a very weak start or a no start. If the disappeared problem was emissions related the light may never go out on its own for some problems, or take many drive cycles (20+) for other problems. The power management controls the specified voltage for the charging voltage of the alternator via the BSD line. 0 (and stays there) within a minute or two of turning the engine off. 45 volts is the ideal range. The car was not started for a couple of days but I guess that shouldn't be the problem. If the low battery warning remains on while the engine is running this may indicate a problem with the charging system. 2. Conclusion. 2-14. Well my old battery wasn't even lasting 2 weeks, it was the original battery so I made (a possibly bad) assumption it was just shot. 2V, matching when the car is just sitting there with engine off. _____ Sep 11, 2023 · 1. gewxj dlvoy pokki kgrjp ezzz quv vyj wpwwkwv uztrkd cfsgvjz isxcq dfjdyvyu ugqwyuh nnfug oseb