Why is my Honda alternator not charging the battery?
I was in the process of limping it home when I realized that the alternator was not charging the battery (pulled the negative cable off the battery and the van died). No bid deal, Im a mechanic so I went to Advance Auto Parts and got a replacement alternator. Put it on, charge the battery and problem solved for a while.
How to reset my Honda Accord after changing a battery?
The anti-theft system on your Honda Accord helps to prevent unauthorized starting of the vehicle. But, if you need to change your battery, you will need to disable the alarm. If you forget to do this it will go off and you’ll need to reset the system.
How do I Reset my Honda radio serial number?
Go to https://radio-navicode.honda.com/ and click on the tab labeled “Get codes.”. Input your radio’s serial number, vehicle’s VIN and your personal information, then click “Submit.”. Write down the security code.
Where is the disarm button on a Honda?
Press the valet’s disarm button, which is located between the stereo and CD control buttons on the instrument panel. Continue to hold the disarm button, and check that the power doors cycle. Hold until the last step is carried out.
Alternator is good but not charging due to missing power supply. Test to battery voltage at the main mast. It should be hot at all times. Check the 4 pin connector for secure connection. Perform alternator output test. 1.With engine at normal operating temperature, remove alternator harness connector.
How to test the alternator on a Honda Accord?
To begin our first test in our DIY How To Test your Honda Alternator, start your Honda Accord with the hood open. If your battery is dead, make sure to charge your battery fully before starting your Honda Accord. With your 2.2 liter or 2.3 liter Accord started, locate your battery on the left side of your Accord engine bay.
What happens if you blow fuse on Honda Accord alternator?
Because this inline fuse is meant to protect the battery and vehicle, if blown it will prevent the alternator from charging the battery. Replace the 80 amp or 100 amp fuse inside your Accord fuse box and then start our tests from step 1 again.
What should the voltage be on a Honda Accord battery?
Steady voltage from 13.5 volts to 14.5 volts – Voltage does not fall or waver on battery terminal – This is the condition you want at your battery while your Honda Accord is running. Voltage that falls and continues to fall from 13 volts or lower – This is a condition that indicates an issue with your Accord’s charging system or alternator.
To begin our first test in our DIY How To Test your Honda Alternator, start your Honda Accord with the hood open. If your battery is dead, make sure to charge your battery fully before starting your Honda Accord. With your 2.2 liter or 2.3 liter Accord started, locate your battery on the left side of your Accord engine bay.
What does it mean when Honda alternator is not charging?
CASE 2: Your multimeter registered a voltage that steadily dropped down to 9 Volts. This is a clear indication that your Honda’s alternator IS NOT charging the battery. Replacing the alternator at this point usually solves around 90% of the No Charge Conditions on any Honda Accord (or Odyssey or Prelude or any 2.2L, 2.3L Honda) around the world.
What to do if your Honda Accord battery won’t charge?
Repair guides and support for the 5th generation Honda Accord coupe, sedan, and wagon. I have changed a new alternator new battery new fuse box new ground wire checked all fuses and the car alternator is not telling the battery its time to charge but has.
Because this inline fuse is meant to protect the battery and vehicle, if blown it will prevent the alternator from charging the battery. Replace the 80 amp or 100 amp fuse inside your Accord fuse box and then start our tests from step 1 again.
What should the amperage be for a Honda alternator?
Amperage should be 30 amps or greater. With engine still at 2000 RPM, full-field charging system. Amperage should be 40 amps or greater. 7.If amperage is not within specification, replace alternator. If voltage is not within specification, replace defective internal voltage regulator.
How does an alternator affect the charging system?
The alternator is at the heart of the charging system of your vehicle. Alternator problems and charging system problems can affect your vehicle in different ways. You may notice: your ALT or CHARGE indicator light comes on, your engine is hard to start and cranks slowly, or doesn’t crank, your battery demands lots of water,
What to do if your alternator goes bad?
When the alternator is going bad, other systems that are powered by the alternator may start to act up. These can include the power windows, power locks, dashboard lights, air conditioning, even your car radio. Other things might be causing these failures, but it’s worth taking it to a trusted auto repair service to have it checked out. 4.
What happens when an alternator goes bad in a car?
The alternator plays a vital role in supplying power to the car’s AC, recharging the battery and ignition. When your alternator is faulty, the battery power is drained fast, and you will find yourself with a stalled car. But what can cause the alternator to go bad?
Why is there a noise coming from my alternator?
Noise from the alternator could be caused by a faulty rotor shaft, rectifiers, bearings, slip rings, stator winding or brushes. You will need to carefully inspect each of these components and replace them. One sure way of confirming that the noise is coming specifically from the alternator is to use a vacuum hose.
Can a loose tensioner cause an alternator to fail?
Nevertheless, if the tensioner wears out, it can cause alternator problems (loose belt or worse, the belt can totally fall of the alternator pulley). Broken or damaged wires This happens mostly in older cars duo to material fatigue of the electric installation.
What causes an alternator to have a service interval?
Main causes of alternator problems (at least from what I’ve seen) are: This is the first and most common reason of them all. Alternators have a service interval of their own. Many drivers neglect this fact which can lead to having alternator problems.
What to do if your alternator is over charging the battery?
Ask an assistant to start the engine and hold engine speed at about 1500 RPM. Measure voltage across the battery with your DMM. You should get 0.5 to 2 volts higher than base voltage. If you are getting more than 2 volts above base voltage, most likely your alternator is over-charging the battery or the battery is faulty.
Repair guides and support for the 5th generation Honda Accord coupe, sedan, and wagon. I have changed a new alternator new battery new fuse box new ground wire checked all fuses and the car alternator is not telling the battery its time to charge but has.
Alternator is good but not charging due to missing power supply. Test to battery voltage at the main mast. It should be hot at all times. Check the 4 pin connector for secure connection. Perform alternator output test. 1.With engine at normal operating temperature, remove alternator harness connector.
How can I tell if my alternator is charging the battery?
Use your multimeter (if you don’t have one get one). Turn it to dc volts put your leads on your battery (with the car running), if your alternator is charging it should read from 13.5V-14.5V (thats a good charge). If your not getting a reading from there you can check your output from your alternator.
What should the voltage be on a Honda alternator?
I also ran across a Haynes vehicle manual that states that the voltage should be around 13.5 V – 15 V, but it is not always this way. The alternator that I bought was new from Honda and not re-manufactured (the cost was just over $470.00), the part number is 31100-5A2-A02 (Made in Japan). Here is a side picture and install picture:
Can a broken belt cause an alternator to not charge?
The alternator will not be able to charge if your belt wears down over time. Fortunately, the broken belt is easy to replace, and can be a quick fix to get your alternator backup and charging again. A broken pulley goes hand-in-hand with the broken belt. The pulleys and belts are part of the system which converts energy into the alternator.
How to troubleshoot an alternator and charging system problem?
If necessary, adjust the belt with the help of your car owner’s manual or repair manual. Inspect the belt for signs of cracks, cuts, shiny spots, deterioration or other signs of wear or damage. Change the belt and belt tensioner at the manufacturer’s recommended interval. 2. Check for Wiring Problems
The alternator will not be able to charge if your belt wears down over time. Fortunately, the broken belt is easy to replace, and can be a quick fix to get your alternator backup and charging again. A broken pulley goes hand-in-hand with the broken belt. The pulleys and belts are part of the system which converts energy into the alternator.
What should battery voltage be when alternator is not charging?
The alternator is connected to a set of belts which when loose can cause it not to function as required. To differentiate an alternator problem from the battery, you will need to use a voltmeter to check for voltage. First, turn off the engine and check the battery voltage. A fully charged battery should have a reading of 12.65 volts.
Where can I buy a new Honda alternator?
The alternator that I bought was new from Honda and not re-manufactured (the cost was just over $470.00), the part number is 31100-5A2-A02 (Made in Japan). Here is a side picture and install picture: I asked AutoZone to test my old alternator stand alone, but they said their machine says that they cannot test it this way.
The alternator is connected to a set of belts which when loose can cause it not to function as required. To differentiate an alternator problem from the battery, you will need to use a voltmeter to check for voltage. First, turn off the engine and check the battery voltage. A fully charged battery should have a reading of 12.65 volts.
The alternator that I bought was new from Honda and not re-manufactured (the cost was just over $470.00), the part number is 31100-5A2-A02 (Made in Japan). Here is a side picture and install picture: I asked AutoZone to test my old alternator stand alone, but they said their machine says that they cannot test it this way.
Amperage should be 30 amps or greater. With engine still at 2000 RPM, full-field charging system. Amperage should be 40 amps or greater. 7.If amperage is not within specification, replace alternator. If voltage is not within specification, replace defective internal voltage regulator.
Steady voltage from 13.5 volts to 14.5 volts – Voltage does not fall or waver on battery terminal – This is the condition you want at your battery while your Honda Accord is running. Voltage that falls and continues to fall from 13 volts or lower – This is a condition that indicates an issue with your Accord’s charging system or alternator.
What to do when your Honda Accord won’t charge?
In fact, you may throw away a perfectly good alternator when the problem might be a blown fuse. Check the Accord’s fuse box, which is located under the hood and near the passenger side. When this fuse is blown, the alternator won’t charge the battery. Replacing fuse number 15 with a new fuse of 7.5 amperage should be able to revive the alternator.
When to change the battery in a Honda Accord?
Motoring experts advise for a battery replacement when there’s a sluggish engine crank during ignition, the check engine light is on, there’s a low battery fluid level, any leaks are present, or it has a bloated battery case. Also, experts suggest replacing a battery about every three years.
What to do if your Honda alternator won’t charge?
3.If battery voltage is not present, check dash fuse No. 2 (15A). Check for open circuit in Black/Yellow wire between dash fuse box and alternator. Check for open circuit in White/Green wire between PGM-FI ECM and alternator.
In fact, you may throw away a perfectly good alternator when the problem might be a blown fuse. Check the Accord’s fuse box, which is located under the hood and near the passenger side. When this fuse is blown, the alternator won’t charge the battery. Replacing fuse number 15 with a new fuse of 7.5 amperage should be able to revive the alternator.
Motoring experts advise for a battery replacement when there’s a sluggish engine crank during ignition, the check engine light is on, there’s a low battery fluid level, any leaks are present, or it has a bloated battery case. Also, experts suggest replacing a battery about every three years.
I also ran across a Haynes vehicle manual that states that the voltage should be around 13.5 V – 15 V, but it is not always this way. The alternator that I bought was new from Honda and not re-manufactured (the cost was just over $470.00), the part number is 31100-5A2-A02 (Made in Japan). Here is a side picture and install picture:
Is the alternator at the heart of the charging system?
Dan Ferrell writes about do-it-yourself car maintenance and repair. He has certifications in automation and control technology. The alternator is at the heart of the charging system of your vehicle. Alternator problems and charging system problems can affect your vehicle in different ways.