Starting the engine on a machine with DISTRIBUTION It is possible only if the transmission control lever is in a strictly defined position, blocking the transmission of torque to the wheels. Unlike mechanics, where it is enough to squeeze the clutch, the automatic box requires the transfer of the selector to the zone. P (Parking) or, in some models, in N (Neutral), which is a critical condition for closing the starter circuit. Ignoring this requirement or attempting to start the engine in position D or R will not lead to anything, since the electronics will block the supply of voltage to the starter in order to avoid a sharp jerk of the vehicle.
Modern safety systems often supplement basic requirements by having the brake pedal fully locked before turning the key or pressing a button. Start/Stop. This action is recorded by the appropriate sensor, and only after receiving a signal that the driver's leg is pressing on the brake, the engine control unit allows the start procedure. If the starter is silent, although the key is turned, the first thing to check is not the battery charge, but the position of the lever. selector The force applied to the brake pedal, since these two factors are the most common causes of failure of a serviceable car.
The main provisions of the selector for starting the motor
Fundamental Rule of Operation transmission It is a logical understanding of the block mechanism. Engineers designed the system so that the engine would only start when the car was guaranteed to be immobilized. The main area for this is the provision PThis is often called parking. In this position, a special pin, called a parking dog, mechanically blocks the output shaft of the box, preventing even minimal rolling of the car on slopes.
There is also an alternative launch option, which is provided by the design of most of the DISTRIBUTION - It's a regime. N (Neutral) Being in a neutral position, the transmission separates the engine and wheels, allowing the motor to work at idle speeds without transferring traction. Launch in neutral It is often used for service purposes or in emergency situations, when it is necessary to start the car from the pusher (although this is rare for a machine) or when the parking mechanism is jammed.
- 🔒 Position
P- the main and safest mode, blocking the shaft of the gearbox with a special locker. - ⚙️ Position
N- an alternative mode that allows you to start the engine, but does not guarantee the immobility of the car without a hand brake. - 🚫 Positions
D,R,L- areas where the engine start is electronically blocked to avoid accidents.
⚠️ Attention: Never try to force the lever in intermediate positions between gears. This can lead to desynchronization of the sensors of the position of the selector, and the car will no longer recognize the start command even in the correct mode.
It is important to note that on some older or specific car models, the start in position N It may be prohibited by the control unit software. In such cases, the system will require the transfer of the lever to the P. If you feel that the lever does not enter the groove until the end, do not use force - perhaps a blockage from movement has worked, which is removed by simultaneously pressing a button on the handle of the selector and the brake pedal.
Algorithm of actions in the presence of a key fob
The process of revitalizing a car with a classic ignition lock requires a clear sequence of actions, the violation of which can lead to battery discharge or starter failure. The first step is to visually and tactilely check the position of the lever. selector. Make sure it is in position. P. If the indicator on the dashboard is green or white, this signals the readiness of the system.
Next, you need to squeeze the brake pedal to the point. In cars with The automatic transmission performs a dual function: physically holds the car and sends an electrical signal to the control unit about the intention of the driver to start driving or start the engine. Without this signal, turning the key can only turn on the tape recorder and backlighting of the devices, but will not turn the engine crankshaft.
☑️ Checklist before launch
After preparation, insert the key into the ignition lock and turn it into position ON or ACC. At this point, a survey of all vehicle systems is conducted: the presence of the key with the immobilizer chip is checked, the readings of temperature and pressure sensors are read. Light bulbs will light up. Check EngineThe battery and oil pressure indicator. Hold the key in this position for 2-3 seconds so that the gas pump has time to create the necessary pressure in the fuel ramp.
The final stage is to turn the key to the extreme position of the starter. As soon as the engine “captures” and starts to work smoothly, the key must be released – it will automatically return to the position. ON. Hold the key in the starting position after the engine has worked, it is absolutely impossible, since this leads to increased wear of the bendix and the flywheel crown.
Start the engine with the start/stop button
Modern cars are increasingly equipped with a keyless access system and start the engine button. The logic of the work here is similar to the key, but there are important nuances associated with electronics. The system must "see" the key mark in the cabin. This usually occurs when the key fob is in the driver's pocket or in a special compartment in the armrest if the battery charge in the key is critically low.
The start algorithm involves a squeezed brake pedal. Unlike older cars, where you could spin the starter without brakes (ignition only), modern machine-guns They often block any action if the foot does not press the pedal. When you press the brake, the readiness indicator on the button or on the dashboard lights up. Short pressing of the button when the brake is squeezed starts the starter, which is switched off automatically after starting the engine.
- 🔑 Make sure the key fob is in the reading area (usually the interior of the car).
- 🦶 Squeeze the brake pedal - the indicator of system readiness will light up.
- 👆 Press the button.
Start/StopOne time with a confident movement, not holding it for long.
If the starter does not work when you press the button, and the inscription “Shift to P” or “No Key Detected” lights up on the instrument panel, you should check the position of the selector and the battery charge in the key fob. Sometimes the system requires re-pressing the button without brake to turn on the ignition, and only then - with the brake to start. This double protection prevents accidental start-up of the engine.
Common Mistakes and Why Your Car Doesn't Start
The situation when the vehicle with automatic-box It refuses to start, often causes panic, but in most cases the reason lies in the simple actions of the driver. The most common mistake is not pressing the brake pedal hard enough. The sensor may be tight or knocked down, and a light touch is not enough to activate the starter circuit. You need to push the pedal confidently, to a characteristic emphasis.
The second most common reason is a discharged battery. In cars with DISTRIBUTION Initial current requirements may be higher, as electronics need to power many systems before starting. If you hear clicks when you turn the key, and the light on the panel goes out, then there is not enough energy to scroll the crankshaft. Also, there is a problem with the brake pedal tip: if it is oxidized, the signal to press does not enter the control unit.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| Silence when turning the key | Not to squeeze the brake or selector not in P | Check the position of the lever and increase the pressure on the pedal |
| Clicks, but the engine doesn't turn. | Battery discharged or oxidized terminals | Clean the terminals, try to light up |
| The key indicator is on. | The battery's in the keychain. | Use emergency start-up method or replace the battery |
| Starter's spinning, but the engine's dead. | Problem with the immobilizer or fuel | Check the availability of fuel and alarm operation |
⚠️ Attention: If the starter turns the engine for more than 10 seconds, and the start does not occur, stop trying. Long-term work of the starter can lead to its overheating and failure. Pause for 30-60 seconds.
Another hidden reason may be the malfunction of the selector itself. DISTRIBUTION. The mechanical connection between the lever in the cabin and the transmission may be broken (the cable will stretch), and in fact the lever will stand in the car. PBut there's no transmission inside the box. In this case, it will help to gently swing the lever from side to side with a simultaneous attempt to start.
Features of the launch in winter
The cold season makes its own adjustments to the engine start procedure, especially for cars with automatic transmission. The thick transmission oil at low temperatures creates additional resistance, although the starter does not spin the box directly at start-up, the total load on the battery increases. Warming up of automatic transmission before the start of the movement - a mandatory procedure, but it begins from the moment of launch.
Before starting the engine in winter, it is recommended to turn on the headlights or music for a few seconds to “wake up” the battery and start chemical reactions in the electrolyte. It increases his return. After a successful launch, you should not immediately start moving. The car must work 2-3 minutes at idle speeds, so that the oil in the box warms up and acquires the necessary fluidity.
- ❄️ Before starting, squeeze the brake and stand for 10-15 seconds, allowing the electronics to warm up.
- 🔋 If the battery is weak, try to start the engine without the gas pedal (for injector cars this is the rule).
- 🕰 After launch, keep the selector in
PorNa few minutes to warm up the transmission fluid.
In addition, in the parking mode, the car is guaranteed not to roll on the icy section of the road immediately after launch.
Emergency launch and safety measures
In emergency situations, when standard methods do not work, drivers look for ways to start the car outside the box. For cars with machine-gun The classic method of "pusher" is practically not applicable and is extremely dangerous for the gearbox itself. Attempt to start the machine, towing the car, can lead to failure of the oil pump, which works only with the engine running, which will cause dry friction and destruction of the nodes.
The only safe emergency method is to use a starter ("booster") or "lighting" from another car. When connecting wires, it is important to observe polarity so as not to burn electronic control The EBU, which in modern cars is very expensive. First, the donor is connected, then his engine is started, and only after that attempts are made to start the stalled machine.
If the car is equipped with a remote start system, but does not start from the key fob, check whether the error indicator on the dashboard is on. Often, the system itself blocks a remote start if the door is open, the hood is not closed, or the fuel level is below critical. In such cases, you must personally approach the car and perform the standard procedure.
⚠️ Attention: Never leave a car with a running engine in a closed garage without running ventilation. Fuel combustion products, especially carbon monoxide, are odorless and deadly to humans.
Compliance with the algorithm and understanding the processes occurring in gearboxThis will avoid most of the launch problems. Regular battery maintenance, check the status of the terminals and careful handling of the selector will prolong the life of your car and ensure a confident start in any weather.
Frequently Asked Questions (FAQ)
Can I start the machine from the pusher?
It's not recommended. Unlike mechanics, there is no rigid connection between the wheels and the engine when the engine is stopped. The pump is out of order, there's no lubrication. An attempt to start with the pusher will lead to overheating and destruction of frictions. The exception is some older models with an additional pump, but it is not worth the risk.
Why does the car start only in position N and not in position P?
Most likely, the selector position sensor (TR-sensor) or the tip in the selector itself is defective or knocked down. The electronics “think” that the gear is not on at position P and blocks the starter. Diagnostics and adjustment of the scene or replacement of the sensor is required.
Do I have to keep my foot on the brakes while the starter is running?
Yes, on modern cars with a button Start/Stop and the brake pedal shall be squeezed out by the safety system at the time of pressing the button. On machines with a key, it is enough to squeeze the brake before turning the key to unlock the steering wheel and chain, but holding it with force at the time of scrolling is not necessary, although it is desirable for safety.
What if the key does not turn in the lock?
Maybe the steering shaft lock was working. Try to turn the steering wheel slightly to the left and right at the same time and turn the key. Also check if the key or lock is contaminated. If the key is worn out, try using a spare.