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Honda CRV Battery Issues (Draining/Not Charging)

The Honda CRV is a popular SUV that is generally trouble-free due to its quality and attention to detail.

However, in recent years, the CRV has been plagued by problems related to its battery either not charging properly or draining.

When your Honda CRV battery is draining overnight or not charging, then the reason is that it is likely suffering from a parasitic drain from the air conditioner relay. If the battery is faulty or the alternator is broken, it can also cause the battery to drain.

Testing car battery

If the battery is more than 3 years old, replacing it will usually resolve the problem if the alternator is fine and there is no current being used when the vehicle is switched off.

If the alternator is not working properly, the battery will not charge during driving and it will eventually cause the vehicle to run out of electrical power. The problem could be related to a wiring fault, poor connections, or a faulty voltage regulator.

If replacing the relay with a new one doesn’t restore power to the battery, then replacement of the alternator is required.

Parasitic draw is a common fault on older cars and not only a problem with Honda CRVs. However, it is common for the air conditioner relay to cause problems with the electrical system. A failed relay will cause the battery to lose charge and drain quite quickly. Replacing the relay solves the problem.

What Causes Honda CRV Battery Keeps Dying?

Jump starting car battery

It can be extremely inconvenient to find your battery dead first thing in the morning.

You may be able to jump-start your car, but if the battery isn’t charging then you’ll have the same problem later in the day.

A Honda CRV battery can keep dying for many reasons. If you don’t look after the battery, it is common for the battery connections to corrode. Loose connections are another reason that the battery may fail to keep its charge. A faulty alternator or extreme temperature changes also affect performance.

Corrosion is a common reason that batteries fail. If the corrosion is severe enough, it will create resistance across the connection, preventing the battery from receiving a charge. The only way to fix this is to replace the battery wiring.

Loose connections can cause intermittent problems that are hard to pin down. When experiencing battery failures, it is good practice to check each battery connection as well as the connections to the alternator and voltage regulator.

Batteries are designed to work within a normal temperature range. If the weather is particularly hot or cold, the battery may not work properly and fail to hold its charge.

How to Fix Honda CRV Battery Keeps Dying

Angry confused guy

Before replacing your battery, it is a good idea to locate the problem.

Unless the battery is older than 3 years, in which case it should be replaced, there are a variety of reasons that the battery may not be holding its charge.

It is well-documented that Honda CRVs experience problems with a parasitic drain due to the air conditioner relay. They also experience problems with their alternators. To solve the problem of a drained battery, either replace the battery with a new one or replace the A/C relay.

If the alternator or voltage regulator is found to be the problem, then they can be easily replaced.

However, before replacing any components, check that the alternator pulley and drive belt are functioning correctly. If the belt is too slack, the pulley will not have sufficient tension on it to turn the alternator.

It is best to check the belt tension and check that the pulley turns while the engine is running.

Once the belt is correctly tensioned, check that the battery is receiving a charge by placing a multimeter on the battery and checking the voltage.

If the alternator is providing a charge of at least 14.5 volts, then the battery should charge normally. If it fails to hold its charge, then the battery is faulty. If the alternator is not producing 14.5 volts, then the alternator needs to be replaced.

What Causes Honda CRV Battery Keeps Draining?

Nervous confused female

There are many different reasons why a Honda CRV battery will keep draining.

A Honda CRV battery will drain due to faulty relay switches or interior lights may cause it to lose charge while the ignition is off. The air conditioner relay is a common fault in certain Honda CRVs. A faulty alternator may also cause the battery to drain when not working properly.

A battery will lose charge if there is a wiring short circuit or if a switch is faulty.

In these cases, even when the ignition is off, the battery will still lose current as the component shorts. This can be as simple as the insulation on wires wearing out from constant chaffing, like in a door at the hinges, or it can be due to a switch inside the air conditioner not working properly.

When batteries get old, they are not able to keep the charge for long and will also build up resistance that prevents them from charging. This can also occur when there is corrosion on the battery terminals and clamps.

How to Fix Honda CRV Battery Keeps Draining

Testing car battery

Once the source of the problem is located, fixing a battery that keeps draining is relatively easy.

If the battery is faulty, replacement is the only option.  If there is a parasitic draw, then it must be located and the components replaced or the wiring fixed. When the alternator or voltage regulator is the cause, they should be replaced only after being properly diagnosed.

To check the battery, place a multimeter on the terminals and check the voltage. A fully charged battery should show at least 12.4 volts. If the voltage is lower than this, the battery is most probably old and needs replacement.

To check if the alternator is working, place the multimeter on the battery and run the engine. The alternator should provide at least 13 to 115 volts to the battery while it is charging. If there is less charge than this, then you should check the voltage regulator.

The alternator is hooked up to the ECU in most newer models. This means that the electrical field in the coil is adjusted depending on the conditions. If the ECU is receiving incorrect information or if the ECU is faulty, then the battery won’t charge properly. You’ll need to check the engine fault codes to see if the ECU is operating correctly.

To check if the battery is suffering from a parasitic load, place the multimeter across the negative terminal and the wiring clamp. Make sure that all electrical equipment is turned off. Then check to see what the amp reading is. If it is more than 25 to 50 milliamps, then you have a parasitic draw.

To trace the fault, remove each fuse in turn and see if it affects the amperage. As soon as you remove a fuse in the faulty circuit, the amperage reading will drop down to around 25 milliamps. This narrows down what the problem component may be.

Cause of Honda CRV Battery Not Charging

Fixing car battery

The Honda CRV is a reliable vehicle but it is known to have electrical problems related to the battery not charging.

A Honda CR-V’s battery may not charge due to a faulty alternator. The alternator is driven by a belt around the alternator pulley. Checking that the tension is correct ensures that the alternator is turning when the engine is running. If the battery is old, it won’t hold a charge for long.

A loose connection can also prevent the battery from charging, along with corrosion of the wires.

If there is physical damage to the wire or the insulation, the alternator may not be able to charge the battery.

The alternator is also connected to the vehicle’s ECU. This connection controls the energy field inside the alternator coil. If the signal is interrupted, the coil may not energize, which results in the alternator failing to charge the battery.

How to Fix Honda CRV Battery Not Charging

Testing car battery

While it may appear to be a difficult task, tracing the cause of a battery not charging is simple. It just takes patience to go through each step methodically.

If the battery is old, the terminals may be corroded or the plates inside the battery may have worn out. This requires a battery replacement. If the alternator is not charging the battery, then the alternator or the voltage regulator may be responsible and need replacement.

Corrosion on the battery terminals should be cleaned with a baking powder and water solution. Once clean, petroleum jelly acts as a good countermeasure to prevent corrosion.

Any broken wiring or damaged insulation is cause for the wire to be replaced.

If the alternator is found to not be providing sufficient voltage, it must be replaced. However, it should be checked by an auto electrician before a new alternator is bought. The alternator is connected to the ECU which controls the electrical field inside the alternator’s coil. If the ECU sends the wrong signal or no signal, then the alternator will not produce any current.

Signs of Honda CRV Bad Battery Symptoms

Cleaning corroded car battery

As batteries age, they give signals that they are about to die. If you pay attention to what is going on with your electrical system, then you can avoid getting stranded with a bad battery.

The most common sign of a Honda CRV with a bad battery is the vehicle becoming hard to start. The engine will either turn over very sluggishly or it will make a rattling or clicking noise. You can confirm that the battery is losing charge by checking the voltage after leaving it on charge overnight.

When you inspect the battery terminals, you may find a build-up of corrosion. This white powder is acid that will burn your skin or eyes. Avoid touching it with your bare hands or getting it on your face.

When you turn the ignition key, you’ll find that the engine will turn over very slowly or take longer than normal to start. Checking the battery voltage should reveal that the battery is low on charge.

When the battery is very low on charge, turning the ignition key will either not produce any noise or movement at all, or the starter motor will just click or make a rattling noise.

This indicates that the voltage is low and is insufficient to turn the engine over.

What is Honda CRV Battery Life Expectancy?

Confused guy with hands up

As with all components in a motor vehicle, you cannot expect the battery to last forever. If the battery is very old, it may still work until one day it just dies suddenly.

Honda CR-V batteries can last for 3 to 5 years. However, this will depend on how you drive as well as on the weather. By ensuring that the vehicle is protected from adverse weather conditions and keeping all connections secure, you can prolong the life of the battery.

Copyright protected article by Know My Auto and was first published on Aug 26, 2022. .

Different makes and types of batteries last for different periods.

Closed cell batteries are less likely to develop problems whereas open, wet cell batteries that require a top-up when their fluid levels drop can deteriorate quickly if not looked after properly.

If you only drive for very short distances, you’ll not give the alternator enough time to recharge your battery.

Starting the engine uses a lot of charge, which must be replaced by the alternator. You should therefore make sure that your engine runs for at least 30 minutes, twice a month, to keep the battery at the correct charge level. A battery in good condition will have a voltage reading of at least 12.4 volts when the engine is off.

Batteries are designed to work at normal temperatures. If it is very hot or very cold, then the battery will not last very long.

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Tips on How to Keep Your Honda CRV Battery Life Longer

Guy holding wood sign

It stands to reason that your battery will last longer if it is looked after properly.

Here are a few ways that you can ensure that you get the best out of your battery.

Batteries need to be charged for at least 30 minutes at a time to top them up after starting. You should do this at least twice a month. Make sure that the battery cannot move around and that the terminal clamps are tight and free of corrosion or physical damage. Replace damaged cables.

Avoid only driving for very short trips as this drains the battery. Try to drive for at least half an hour at a time so that the battery has time to receive a full charge.

Refrain from playing the radio for long periods with the engine off. Using electrical devices when the engine is off, drains the battery. 12-volt starter batteries are not designed for long-drawn-out periods of use. They are designed to provide a quick burst of energy and then get charged back up again quickly.

Avoid leaving the car standing for months at a time without being used. Start and run the engine at least twice a month for half an hour.

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KnowMyAuto is the sole owner of this article was published on Aug 26, 2022 and last updated on .

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