「Knowledge」 list

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Knowledge Maintenance Useful tips

What causes black or white smoke to come from a diesel car’s exhaust?


Diesel engines are commonly associated with black smoke spewing from the exhaust, right? You can often see, on uphill slopes and the like, trucks spitting out black smoke from behind. I will tell you the reason why diesel engines produce black or white smoke. Black smoke and white smoke are signals of a dangerous engine Care must be taken when black smoke, white smoke, or both are emitted from the exhaust of a diesel engine. Depending on the cause, this may be a sign of a malfunction or failure of the engine, so if you leave it as it is, ...

Knowledge Maintenance Useful tips

The battery warning light does not light up when the battery is broken


When the battery warning light turns on while driving, it can make you panic, right? Actually, the battery warning light turning on does not mean that the battery is broken. I will tell you why the battery warning light illuminates and how to deal with it. What is the role of the battery warning light? The battery warning light is a warning light that lights up when there is an abnormality in the state of charge of the battery. Generally, the battery of a car is 12 V, and around 14 V while running, but it is voltage below a ...

Driving Knowledge Useful tips

Do you know how to use overdrive?


A switch with "O/D" written on it on or around the shift lever of an automatic vehicle and its surroundings. Do you know what it is for and when to use it? What is overdrive (O/D)? Cars have a transmission, in order to start from the stopped state and increase the speed. This is easy to picture if you imagine the gears of a bicycle. Bicycles with gears can start moving without exerting much force, and can run much faster than bicycles without gears. Cars also have at least 3 gears. Some even have 8 or 10 speed gears. Starting ...

Knowledge Useful tips

Do automatic cars also engine stall?


When most people hear of a car stalling, they think of manual-transmission cars, and situations like failed hill-starts or stalling when starting after waiting at traffic lights. However, in fact, even automatic cars can stall. Why does this happen? The cause of stalling in automatic vehicles Here, we will introduce the engine stalling by symptoms. 1.Quiet stalling without warning On occasion, a vehicle might suddenly stall without any warning when running. There is a possibility that trouble may have occurred in the ignition system. Specifically, there is a problem with spark plug or plug cord. Because the spark plug does ...

Accessories Knowledge Useful tips

What are the “recirculation” and “fresh air mode” buttons on a vehicle’s air conditioner for?


There are two buttons on a car’s air conditioner. One is the “recirculation” button, and the other is the “fresh air mode” button.   How to use these buttons is one of the things commonly reported as unknown by vehicle owners, so here I will tell you about their distinctions. What is “recirculation mode”? Recirculation is used is to circulate the air inside the car. Selecting this button closes an air duct in the front of the car so that the air from outside the car does not enter the car. What is “fresh air mode”? Selecting this button introduces ...

Knowledge Maintenance Useful tips

Noise and vibration from the engine! Why does knocking occur?


If there are unusual sounds that have never been heard from the engine or vibrations that are different from usual, it makes us very uneasy, right? Perhaps the engine is causing "knocking". What kind of phenomenon is knocking? Knocking refers to a phenomenon in which abnormal noise and vibration are generated from the engine. These sounds can be heard as a kind of "rattle rattle", "cancan cancan" or "kinkin kinkin". It is called knocking because noise sounds like the sound of knocking on a door. Why knocking happens There are several types of knocking. For each type, I will introduce ...

Driving Knowledge Useful tips

Understanding the functions of the shift lever of an Automatic car


Automatic transmission vehicles have a shift lever, but some people only use P and D. Understanding the functions of the shift lever will allow you to use your automatic vehicle more functionally. The Function of each range of the shift lever Written on the shift lever of an automatic vehicle are letters, rather than numbers. In an automatic vehicle, the letters or numbers are called the "range". Below is a summary of each range. Other buttons Several other buttons exist in and around the shift lever of automatic vehicles. Operation button The operation button is used to move the shift ...

Knowledge Useful tips

Why is the accelerator pedal always on the right, and the brake pedal on the left?


Accelerator on the right, brake on the left. Currently, if you look at any car on the road, they all have the same pedal configuration, so we think that it is natural. Is there any reason for this pedal placement? I investigated to try to answer this simple question. Is it decided by law and the automobile industry? In order to manufacture and sell vehicles that can use public roads in Japan, manufacturers have to conform to the "road safety standards of road transportation vehicles" established by the Ministry of Land, Infrastructure and Transport of Japan. I investigated, to see ...

Knowledge Useful tips

How to unlock if you’ve been locked out while your key is in the car


People sometimes gets in a trouble that the person left the car key in the car and locks him/herself out. There is no need to rush. I will explain how to deal with this lock-out situation. How to unlock You can unlock by yourself. However, please be advised that there is a possibility of damage to your vehicle so unlock at your own risk. Use a wire hunger This is a classic way to unlock. No cost incurred. You could unlock the door with a wire hanger if your vehicle was an older model. Between the window glass and the ...

Knowledge Maintenance Useful tips

What will happen if diesel put into a petrol vehicle?


You are supposed to fill a diesel vehicle with diesel and a petrol (gasoline) vehicle with petrol. What would happen if you put incorrect fuel to the vehicle? I will explain the symptom the vehicle may have when you have accidentally pumped diesel to a petrol vehicle and vice versa-. Symptoms of incorrect fuel contamination Putting petrol to a diesel car It will lower the engine power significantly if diesel has been mixed with petrol in the fuel tank.  Also, some other unusual symptoms may be seen, for example, odd idling, the engine noise, vibration, or black smoke from the ...

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