How does the Honda alternator charge the battery?
During startup and periods of low electrical loads or after the battery has been recharged after startup, the ECM will set the charging voltage at a lower 12.4-12.9 volts. Honda maintains voltage at this low rate once the battery is fully charged in order to maintain battery charge.
What should the charge voltage be on an alternator?
Turn on the high beams for 10 seconds and then turn them off. Measure battery voltage across the battery posts with your DMM. You should get between 12.4 and 12.6V. This means your battery is fully charged. If you get a reading below 12.4V, charge the battery before continuing. 5b. Measure the Charging System’s No-Load Voltage
How often do Honda alternators need to be replaced?
If you don’t know how the Honda alternator and charging systems work in your particular vehicle, it’s very easy to misdiagnose it and falsely conclude that the alternator has failed. Thousands of perfectly good Honda alternators are replaced each year. Let’s take a look at the different generations and how they work so you can avoid a misdiagnosis
Where is the ELD on a Honda alternator?
When the alternator reports a problem to the ECM, the ECM sets a trouble code and communicates digitally with the gauge control module to light the BATTERY light on the instrument cluster. The ELD inside the fuse box or at the battery terminals.
During startup and periods of low electrical loads or after the battery has been recharged after startup, the ECM will set the charging voltage at a lower 12.4-12.9 volts. Honda maintains voltage at this low rate once the battery is fully charged in order to maintain battery charge.
How does the 79-83 Honda DOHC charging system work?
79-83 Honda DOHC charging system help The regulator/rectifier is a box that actually contains two separate devices. The regulator is what sends the power to the rotor. It turns on and off power to the rotor so the magnet turns on and off so the system can maintain 14.4 volts at the battery.
Why is my Honda alternator not working properly?
I recently went to AutoZone to have my battery and alternator tested. They hooked up the test tool and said that the battery was good, starter was good, but the alternator is bad because the voltage regulator test failed. I called the Honda dealer near me and ordered a new alternator. The wait time was 1 day.
Turn on the high beams for 10 seconds and then turn them off. Measure battery voltage across the battery posts with your DMM. You should get between 12.4 and 12.6V. This means your battery is fully charged. If you get a reading below 12.4V, charge the battery before continuing. 5b. Measure the Charging System’s No-Load Voltage