The Function of the Selenoid Valve in Cars and How It Works, Let's Find Out!

The function of the solenoid valve should not be underestimated by car owners. So what is the actual function of this component? And how does it work? For more details, please pay attention to the following review.

Function of the Solenoid Valve in Cars

The solenoid valve has several functions in cars that you need to know. Here are the complete functions.

1. Shifting automatic gear transmission

The first function of the solenoid valve is to facilitate the process of shifting automatic gears in the car's transmission system. This way, the driver can easily control the speed of the car.

2. As an oil flow regulator

The second function is that the solenoid valve is used to control the flow of oil in the valve body area. The oil flow will be regulated according to the amount needed by the transmission system. This way, the transmission can be shifted easily and smoothly.

3. Stopping fuel distribution at the idle port

The last function is that the solenoid valve can be used to stop fuel distribution at the idle port. This condition can prevent the risk of dieseling when the engine is locked (contact position off) or when the engine is running.

Read Also: Let's see how to easily repair a damaged solenoid

How the Solenoid Valve Works

The solenoid valve has a relatively simple yet unique way of working. When you start the car engine, the engine automatically analyzes data. This data analysis comes from the vehicle speed and engine speed sensors. 

When the engine is running, the solenoid valve will be pulled and open the valve. This condition helps facilitate the delivery of fuel from the low-speed circuit. Subsequently, this part will release fuel from the idle port.

Meanwhile, when you turn off the engine or the car's ignition key is in the OFF position, the fuel line will automatically be closed by the solenoid valve. This condition causes the fuel to remain in the idle port, preventing the engine from experiencing dieseling.

Signs of a Problematic Solenoid Valve

When your car's solenoid valve has problems, several signs and symptoms will appear.

1. A noisy sound from the car engine when shifting the transmission from position N to D or from P to R.
2. The engine pull becomes heavier and the car stutters while driving.
3. There will be a loss of power condition when going uphill.
4. There is a leak in the solenoid area causing oil to seep.
5. Interruption of the electrical flow in the solenoid and surrounding components.

Causes of Solenoid Valve Problems and Damage 

Here are some factors that can cause damage to the solenoid valve.

1. Burning of the solenoid coil.
2. Worn or damaged solenoid seal due to interruption of the electrical circuit in the solenoid.
3. Presence of rust on the solenoid valve block.
4. Accumulation of dirt in the piston area due to the entry of dirty air.
5. Absence of an oil tube that lubricates the piston in the air supply section.
6. Absence of an air filter tube in the air supply area, making the solenoid block susceptible to water.

How to Address a Damaged Solenoid Valve

To avoid damage to the function of the solenoid valve, you need to check this component regularly. If damage occurs, immediately visit a workshop or the nearest Daihatsu dealer. This way, the mechanic will repair the damage to the solenoid valve and other car components.

The Daihatsu dealer not only helps repair your car but also provides original and quality spare parts. This way, the spare parts you use are guaranteed to be of high quality.