A modern car with automatic transmission (AGB) greatly simplifies the life of the driver, especially in conditions of dense urban traffic. However, for a beginner who is first-time switching from mechanics or who has just received the license, the engine start process can seem complicated due to the lack of a clutch pedal and the presence of additional locks. Understanding the logic of work electronic control unit and mechanical transmission locks are the key to a safe start.
Incorrect actions when starting the power unit can lead not only to the inability to move from the spot, but also to serious breakdowns of the starter or the box itself. In this article, we will analyze in detail all the stages of preparation, the launch algorithm in various conditions and the nuances that are silent in driving schools. Careful study This will help to avoid expensive repairs.
Preparation of the car for engine start
Before you turn the key in the ignition lock or press the start button, you need to make sure that the car is in a safe condition. The first thing to pay attention to is the position of the gear lever. Unlike mechanics, where the neutral is determined by hearing and by the free movement of the lever, in the machine there is a clear fixation of positions. P (Parking) and N (Neutral). To guarantee the start of the engine, the lever must be in the parking position.
The second critical point is the state of brake. Most modern cars are equipped with a start lock, which will not allow the starter to turn the engine if the brake pedal is not squeezed out. This is done for safety so that the car does not accidentally roll at start. Also, before starting, it is recommended to check whether powerful energy consumers such as headlights or climate control are turned off to make the battery easier to run.
⚠️ Warning: Never try to start a car with gear on
D(Drive) orR(Reverse) Although the electronics of most cars will block this process, on older models or if sensors fail, this can lead to a sharp jerk of the car and an accident.
It is also worth visually inspecting the dashboard for burning error indicators before turning the key. If the light is turned on after the first click (the light bulb) Check Engine or low oil pressure indicator, that's normal - they should go out after the engine starts. If they burn constantly, starting the engine can be dangerous.
Engine start algorithm: step-by-step instructions
The engine start process on automatic transmission cars is standardized, but requires a clear sequence of actions. First, the driver must take a comfortable position, adjust the seat and mirrors. Then, you should completely squeeze the brake pedal with your left leg (or right, if you are used to it), holding it in this position throughout the start-up process. This is a prerequisite for unlocking the starter.
Next, you need to make sure that the gearbox selector is in position. P. In some models of cars, for example BMW or MercedesThe selector can be located on the center console or on the steering column, but the logic remains the same. After that, you can turn the ignition key to the extreme position or press the button. Engine Start/Stop.
☑️ Checklist before engine start
If the engine does not catch the first time, do not hold the starter for more than 10 seconds. It is necessary to pause in order to battery I reset the charge and try again. After successful start-up, let the engine work for 30-60 seconds, especially in the cold season, so that the oil disperses through the lubrication system.
Start Nuances from the Start/Stop button
In modern cars, the classic ignition key is often replaced by a system. Keyless Go or the launch button. The algorithm of actions is similar, but has its own characteristics. The chip fob should be in the cabin, usually in the driver's pocket or in a special compartment if his power supply is sat down. The system reads the signal and allows the launch only if there is a tag.
Pressing a button Start without the brake is included only the ignition mode (lights, the tape), but the engine does not start. This is done to save fuel and check systems. For a full start, it is necessary to combine: the button Start + brake pedal squeezed. In some models, such as Toyota or LexusIt requires a short but confident push.
What to do if the battery is in the keychain?
Most cars with the Start/Stop button have an emergency start method. Find a mechanical key on the key fob, open the door, and then apply the fob directly to the start button or to a special label on the steering column (usually marked with the key symbol). After that, holding the brake pedal, press the start button. The system counts the chip at close range even without a key fob power.
The car will go into mode. READYAnd the drive starts on electric. This is normal and the driver should focus on the readiness indicator on the dashboard, not the sound of the motor.
Starting a car with a manual box and automatic transmission: what is the difference
The main difference is the need to control the position of the gear shift lever and work with the pedals. On the mechanics, the driver must squeeze the clutch to separate the engine and transmission. On the machine, this function is taken over by a hydrotransformer, but the requirement to transfer the selector to the parking lot remains strict.
Below is a comparative action table for different types of powertrains that will help you better understand the differences in algorithms:
| Action. | Mechanical transmission (ICAT) | Automatic transmission (ACP) |
|---|---|---|
| Lever position | Neutral (N) | Parking (P) |
| pedals | Squeeze the clutch | Pull the brakes out. |
| Lockdown | Often not required | Definitely (brake) |
| Risk of a jerk | High (if gear is included) | Low (thanks to electronics) |
Another important difference is the ability to tow. The machine with automatic transmission can not be started "from the pusher", since when the engine does not work, the pressure of the oil in the box is not created, which will lead to its instant failure. For owners. Volkswagen or Audi With robotic boxes (DSGs), this rule is also relevant.
If you are transplanting from mechanics to automatic, at first, specifically put your left leg on the rest area to the left of the brake pedal. This will develop the habit of not keeping your foot above the pedals and eliminate accidental brake pressing instead of gas in a stressful situation.
Typical Beginner Mistakes at Startup
One of the most common mistakes is trying to move the lever out of position. P without brakes being pressed. On many cars, the selector simply won’t budge because of the blocker, but on older models, this can lead to a break in the lock. The driver starts pulling the lever, risking damage gear-box.
Another mistake is to start the engine with the power consumers on. In winter, when the battery capacity is reduced, the power included at full oven power, heated seats and headlights can "land" the battery at the time of start. It is better to start the engine first, let it work a little, and only then turn on the climate system.
⚠️ Note: Do not stop the car immediately after an active ride if you have a turbocharged engine. Allow the turbine to cool at idle speeds for 1-2 minutes, otherwise the oil in the turbine bearings may cork, leading to expensive repairs.
Also, beginners often forget to check whether they are delayed. parking-brakebefore removing the leg from the main brake pedal after starting. On gradients, this can lead to uncontrolled rollback of the car.
Features of the launch in winter
In winter, the launch algorithm requires additional actions. Before turning the key, it is recommended to turn on the high beam headlights for a few seconds. This will trigger a chemical reaction in the battery and "heat" the electrolyte, which will increase its return. After that, you can try to start the engine.
If the first time the car did not start, do not panic. For diesel engines, especially on cars of brands Land Rover or JeepIt is important to wait until the indicator of heating of candles incandescent (spiral on the panel) goes out. Only then should the starter be turned.
The main rule of the winter start: do not hold the starter for more than 10 seconds and take breaks of 30-60 seconds between attempts, so as not to "kill" the battery and not to fill the candles.
After a successful launch, do not start immediately. Give the oil time to spread all over the nodes. hydrotransformer and transmissions. In severe frosts, the warming up time can be up to 5-10 minutes, until the engine speed drops to normal idling values.
What if the lever is stuck in position P?
If after starting the engine you can not transfer the lever from the parking lot, it is possible that the solenoid locking or the battery is not faulty. Find an emergency unlock (usually a small hole next to the selector where you need to press the screwdriver) or try to sway the steering wheel slightly, as the lock is often related to the position of the wheels.
Can I start the machine from the pusher?
Absolutely not. Unlike mechanics, where you can close the wheels and crankshaft through the clutch, automatic transmissions do not have a hard connection. An attempt to start the machine from the pusher will lead to the shafts of the box turning without oil pressure and its guaranteed breakage. Use a launcher or help from another vehicle.
Why did the car twitch at launch?
A sharp jerk at start may indicate a malfunction of engine supports (pillows) or problems with the hydraulic transformer. It is also possible if the launch was carried out with the gear turned on, which is extremely dangerous. If the jerks are repeated, a diagnosis is necessary in the service.