needs to recharge it. The alternator in your Honda provides the electrical power to your vehicle after the engine starts. Don't drive the car in "Econ" mode, and leave the headlights on all the time while you drive. 0000002020 00000 n Albin, these are the pids I look at when I'm dealing with a Honda. Honda/Acura charging systems appear to be similar to other manufacturers. Almost instantly the battery voltage increased to a normal voltage signal. With the engine still running, you need to turn everything on, inside your Honda Civic, that you can possibly turn on. alternator. 0000001783 00000 n I also appreciate the systems such as the Ford products that report commanded and actual regulator control. So take all necessary safety precautions. At an idle with an adequately charged battery and no load the alternator shows no charging voltage increase. I am having the exact same problem with 2012 crv. crank and start the engine and 2.) Turning on the headlights increases the current draw and caused the The voltage jumps up and the the alternator when it thinks the battery has enough charge (voltage is high enough). I'd like to contact Honda and file a handful of complaints- the fact that no one updated my car despite requests to do so when in for regular maintenance, that no one even looked when they pulled up my VIN to see that I still didn't have the update, and the potential damage... even though I'm highly doubting they'd cover it. Even way back then, I kept saying "You have to know your OPPONENT". The longer the field rotor is … The voltage displayed on the meter should be above 12.5 volts. If the voltage displayed is the same or less than battery voltage, replace the alternator. This system requires a different approach for testing. 0000028477 00000 n 2012 Battery/Alternator/Voltage Regulator. Again a more active Lin bus signal is observed. The battery on your Honda Civic has to be fully charged, to be able to successfully accomplish this multimeter test. If driving with the lights on the battery will start to fully charge up. That test the service guy did by disconnecting the neg terminal only meant that the alternator was putting out enough voltage to keep it running, but maybe not enough to charge the battery. %PDF-1.5 %���� 74 0 obj << /Linearized 1.0 /L 312548 /H [ 28998 314 ] /O 77 /E 29312 /N 5 /T 311024 /P 0 >> endobj xref 74 26 0000000015 00000 n 0000004067 00000 n Since an alternator’s output can vary both up and down from 13.5V in real-world situations, it’s actual output limits will vary from the idle and rated numbers. around 12.3 vdc using a voltmeter across the battery terminals. 0000006587 00000 n When you do the test on your Honda Civic, it will be an On Car Test, so don't remove the alternator from the car. OK, let's interpret your multimeter test results in the next page. Or 12.5 Volts DC that will steadily decrease as long as the engine is running. 2012 Honda Civic Alternator. I had exactly the same problem on my 2012 when it was less that 2 This is absolutely true. As an Amazon Associate, I may earn a small commission from qualifying purchases from the Amazon product links from this website. A steady 13.5 to 14.5 Volts DC. ALTERNATOR TEST 1: Testing Battery Voltage With A Multimeter, ALTERNATOR TEST 2: Testing The Continuity Of The Bat (+) Circuit, ALTERNATOR TEST 3: Checking The Alternator Fuse. Then turn on the windshield wipers on high, and again take a look at your multimeter. Now my car doesn't overheat, instead Also, Honda is very good with chraging data PIDS. not dashboard lights or anything. With the multimeter test leads, probe the battery terminals. I know on some later models, the computer would not charge the battery under light electrical load to save fuel, so perhaps that update will help. keep the engine running for about 10 minutes while you perform this test. So it's a hunch from a Honda employee, but I'm going to share just in case it helps anyone else out: Hopefully that will help. Appreciate the information,although it is not new at all with Honda. Leaving the voltmeter. difference characteristics as it worked fine for the few months that I kept the car. The ECU throttles back the alternator to save fuel. The. If the voltage is low, charge the battery before further testing. Just trying to pass along some info that might save an incorrect diagnosis. The voltage will decrease from 12.5 Volts DC to 10-9 Volts DC the more stuff you turn on and the longer your Honda Civic stays running. 0000003416 00000 n 0000006245 00000 n Either your multimeter will register a nice and steady 13.5 to 14.5 voltage (in Volts DC) no matter what you turned on inside the Civic. Tools  |   All of our 2012 Civic alternators feature an output between 13.5 and 14.8 volts to power your accessories and keep … 2.) Is this problem a software issue, control module issue, etc. battery however may lose too much capacity before the charging system recognizes that it The eld was used for high electrical load compensation. Content will be removed if CarGurus becomes aware that it violates our policies. The battery in your Honda is constantly supplying power to the vital systems of the car, even when the engine isn't running. How much of that testing can be done with a scan tool, with both bidirectional control & pid data? replaced and relays replaced(A/C). 2012 Honda Civic Charging System Testing The alternator control on the 2012 Civic consists of single wire Lin bus controlled alternator, a battery load sensor, the instrument cluster and the PCM. x��Z[O7~�W�[�C]�/R��9�. I really doubt that the computer may show damage in the future due to that neg bat cable being disconnected. If there was some damage, it should show up pretty soon. Do NOT follow this link or you will be banned from the site! Touch the red test lead of the meter to the positive battery terminal and the black test lead of the meter to the negative battery terminal. Set the controls on your digital volt/ohm meter to the “Volt D/C” position. Alternator Output Supply … Just in case. WTF! They still use a belt driven three phased alternator and an internal electronically controlled voltage regulator that has three main functions. 0000028998 00000 n 0000001804 00000 n battery is charged. Battery is just a Then the voltage starts to drop down to around 12.3 vdc with the car running.