Did you ever had this trouble trying to start your car in the morning and it doesn’t work ? If it never happened to you , at least you’ve already had that fear. So when you find out an alternator noise on Toyota Corolla, you can already see yourself breaking down, stuck waiting for the tow truck. That’s why our team has decided to write this article to support you find the sources of alternator sounds. In this article, you will first learn the role and operation of the alternator in your Toyota Corolla and then what the causes and solutions to alternator noise on Toyota Corolla may be.alternator-noise-toyota-corolla

Role and alternator operation Toyota Corolla

Alternator role

Your alternator is an fundamental part of your Toyota Corolla. Indeed, its mission is to give power to your entire electrical system: headlights, interior lighting, signalling, computer… It will have the mission of recharging the battery once the car is in motion, to provide power to the car in motion and to allow you to always have a sufficient energy reserve to be able to restart the next time.

Alternator functioning

The alternator functions on an electrical principle that has been used for decades, the concept of copper coil wound around a magnet . This coil while rotating generates electricity. It is the engine motor itself that will give the energy required by the alternator to generate the energy, via the accessory belt or alternator belt. When your Toyota Corolla engine stops, the battery takes over to give the car with energy.

What are the distinctive alternator noises or sounds on my Toyota Corolla and what are the causes?

I find out a knocking noise coming from the alternator of my Toyota Corolla

One of the typical noises of a tired alternator on Toyota Corolla is a knocking noise. This alternator sound on Toyota Corolla will generally show up when your engine is idling, it can be linked to voltage drops that could affect the normal operation of electrical elements such as headlights for example. In general, it is a of both bearings of the alternator that is malfunctioning, to verify it, use a multimeter on the terminals of your car with the engine running and you must get a value between 12 and 14.7 volts, which means that your alternator is recharging your battery well. If the value is lower, the alternator of your Toyota Corolla is tired and you should think about changing the bearing if it is the only cause otherwise the whole part.

I find out a grinding noise coming from the alternator of my Toyota Corolla

If you are in the situation where the alternator of your Toyota Corolla produces grinding sounds, in this case you will have to look at it more seriously. This warning sign can testify as for the knocking sound of a tired bearing, but generally, we often notice by looking more closely that it is the accessory belt that is loosened or worn and is therefore the cause of it. In this case, we recommend that you look for advice this article to find all the necessary information to solve an accessory belt noise on Toyota Corolla.

I find out a loud noise from the alternator of my Toyota Corolla

Listening a loud noise from the alternator of your Toyota Corolla is quite common, in fact, it emits an audible sound when creating the electrical pulses it generates. It is up to you to verify that the battery indicator light on your dashboard does not show up, and that you do not have a voltage drop when your engine is running (headlight or dashboard light that jumps for example. If this noise is too loud, we recommend that you have a look this article to find other ways to solve problem of noises from front end on Toyota Corolla.