Starting the engine on a car with automatic transmission (automatic transmission) It just seems like a simple procedure. In practice, even experienced drivers sometimes make mistakes that reduce the life of the transmission or lead to breakdowns. In this article we will analyze not only the basic sequence of actions, but also hidden nuances: how the position of the selector affects the start, why you can’t ignore the mode P, and what to do if the car does not start after a long period of inactivity.

We will pay special attention winter launch - here automatic machines behave differently than mechanics and require a specific approach. You will also learn how the procedure differs for different types of automatic transmission (torque converter, robot, variator) and what two critical errors lead to 80% of automatic transmission breakdowns in the first 5 years of operation. If you just got behind the wheel of a car with an automatic transmission or are planning to switch from a manual one, save this manual to your bookmarks.

Preparing to start: what to check before turning the key

Before inserting the key into the ignition switch, visual inspection and checking key systems. This will take no more than a minute, but will save you from typical problems:

  • 🔋 Battery level. On the dashboard, after turning on the ignition (turning the key to the first position), a light should light up BATT or charge indicator. If it flashes or lights dimly, the battery is low.
  • 🚗 Automatic transmission selector position. Must be in mode P (Parking). If the lever is in position N (Neutral), the car may roll on a slope.
  • 🔑 Key in the lock. Make sure you are using the original key with the immobilizer chip. Duplicates without a chip block the launch.
  • 🚨 Alarm indicators. After turning on the ignition, check whether the lamps go out Check Engine, ABS and AT (if any). Lighting indicators indicate malfunctions.

If the car was parked in frost below −15°C, turn it on for 10–15 seconds before starting high beam. This will warm up the electrolyte in the battery and make it easier to crank the starter. For machines with Start/Stop system (for example, Volkswagen Golf or BMW 3 Series) this step is required - otherwise the electronics may block the launch.

⚠️ Attention: Never turn the key to START longer than 5 seconds in a row. If the engine does not start, pause for 30 seconds - this will prevent the starter from overheating. Three unsuccessful attempts in a row require diagnostics!

Step-by-step instructions: how to start a car with automatic transmission

The launch algorithm is the same for most machines, but there are differences for robotic boxes (for example, DSG at Volkswagen) and CVTs (Nissan X-Trail, Toyota RAV4). Follow this checklist:

Insert the key into the lock and turn to position ON (ignition)

Make sure the selector is in mode P (on some models it is allowed N)

Depress the brake pedal all the way (required!)

Turn the key to position START and hold until the engine starts (no more than 5 seconds)

After starting, wait until the speed stabilizes (1–2 seconds) and release the key

-->

For vehicles with start button (keyless) process simplified:

  1. Make sure the key fob is in the passenger compartment.
  2. Depress the brake pedal.
  3. Click the button START/STOP without holding (on some models a short press is required, on others - holding until launch).

If the engine does not start the first time, try again after 30 seconds. On machines with autostart system (for example, Hyundai Santa Fe or Kia Sorento) after three unsuccessful attempts, the system may be locked - you will need to remove the key and repeat the procedure after 2-3 minutes.

Torque converter (classic automatic)

Robot (DSG, Powershift, etc.)

CVT (CVT)

I don't know-->

Errors when starting an automatic transmission: what breaks the box

The two most common mistakes that lead to machine breakdown within 3–5 years:

  1. Starting without pressing the brake pedal. If the selector is in mode P, the lock will not allow you to turn the key, but on some models (for example, Ford Focus older than 2015) this mechanism is absent. Without pressing the brake when starting in mode N or D The car may jerk and damage the torque converter.
  2. Holding the key in position for a long time START. This leads to overheating of the starter and increased wear of the flywheel crown. On vehicles with Start/Stop system (for example, Audi A4) such a habit disables the intelligent launch controller.

Other common mistakes:

  • 🔄 Frequent startup attempts with an interval of less than 30 seconds - discharges the battery and heats up the starter.
  • ❄️ Cold start without warming up (relevant for CVTs). B Nissan Qashqai with a CVT this causes premature belt wear.
  • 🚗 Trying to start without warming up the automatic transmission in winter. The oil in the box thickens, and the first 1–2 km of movement without warming up reduces the life of the clutches by 15–20%.
⚠️ Attention: If the indicator on the dashboard lights up after starting AT (or PRND flashes), turn off the engine immediately! This is a signal that the box is faulty. Further launch may lead to complete failure of the automatic transmission.

Features of launching in winter: how not to kill the machine

At temperatures below −10°C The automatic transmission oil thickens, and the box works in extreme mode. To avoid breakdowns, follow this algorithm:

Why can’t you go straight away after the winter launch?

At low temperatures, the oil in the automatic transmission becomes viscous, and the pump cannot provide normal pressure in the valve body. For the first 1–2 minutes after starting, the box runs dry, which leads to accelerated wear of the friction discs and bearings. With CVTs, a cold belt can slip, causing jerking and overheating.

  1. Turn on the ignition (turn the key to the first position) and wait 5-10 seconds. This will allow the fuel pump to build up pressure in the fuel system.
  2. Press the brake pedal and start the engine. If the battery is weak, use the N (neutral) - this will reduce the load on the starter.
  3. Warm up the engine to operating temperature (the temperature gauge arrow should move from zero). Warm-up is critical for automatic transmissions oils in box - it takes 3-5 minutes.
  4. Smoothly move the selector for all modes (P→R→N→D→L), holding each for 2–3 seconds. This distributes the oil through the valve body channels.

For machines with CVT (Nissan Juke, Subaru Forester) is required additional heating: after reaching the operating temperature of the engine, let the box operate in mode D with the brake pressed for another 1–2 minutes.

Temperature, °C Engine warm-up time Automatic transmission warm-up time Recommendations
0 to −10 2–3 minutes 1–2 minutes Standard warm-up is sufficient
−10 to −20 5–7 minutes 3–5 minutes Use the mode N to start, avoid high revs
−20 to −30 10+ minutes 5–7 minutes Use a preheater or autostart at intervals of 15 minutes
Below −30 Not recommended Not recommended Use a garage or heating, the risk of automatic transmission failure is higher than 50%
💡

If the car does not start in the cold, try turning on the low beam for 10-15 seconds, then turn it off and try again. This will “wake up” the battery and increase the chances of a successful start.

What to do if a car with automatic transmission does not start

If the engine does not respond to turning the key, follow this algorithm:

  1. Check the battery:
    • 🔦 Turn on the headlights - if the light is dim, the battery is low.
    • 🔧 Try to “light” from another car (observe the polarity!).
  2. Make sure the selector is in P. On some models (for example, Mazda CX-5) the start blocker is activated only in this position.
  3. Check immobilizer:
    • 🔑 The immobilizer indicator (usually a red light with a key image) should go out 2-3 seconds after the ignition is turned on. If it blinks, the key is not recognized.
    • 🔄 Try a second key or reboot the system by removing the key for 10 minutes.
  • Diagnose the starter:
    • 🔊 When you turn the key, you should hear the relay click and the starter rotate. If there is no click, the relay is faulty or the circuit is open.
    • 🔄 If the starter turns, but the engine does not catch, the problem is in the fuel system or spark plugs.

    For vehicles with Start/Stop system (for example, Mercedes-Benz E-Class) if the start is unsuccessful, resetting errors can help: turn off the ignition, remove the key for 1 minute, then try again. If the problem persists, a diagnosis is required ELM327 or contacting service.

    💡

    If the starter turns but the engine does not start, never hold the key in the START longer than 5 seconds. Every extra second of holding reduces the starter's life by 1–2%.

    Differences in starting for different types of automatic transmissions

    Not all machines are the same. Let's look at the features for the three main types:

    Automatic transmission type Launch Features Typical problems Examples of models
    Torque converter Classic algorithm. Allowed to start in mode N (neutral). Wear of the torque converter due to frequent starts in D or R. Toyota Camry, Honda CR-V, Ford Explorer
    Robot (DSG, Powershift) Required mode P. Launch in N may be electronically blocked. Overheating of clutches when starting with the gas pedal pressed. Volkswagen Golf, Ford Fiesta, Audi A3
    CVT (CVT) Requires mandatory warming up in winter. Launch only in P. Belt slippage during cold starts without warming up. Nissan Qashqai, Subaru Outback, Toyota RAV4

    For robotic boxes (for example, DSG-7 at Volkswagen) critical fully depressing the brake pedal at startup. If the pedal is not pressed all the way, the electronics may block the start. In CVTs (Nissan, Subaru) you cannot start the engine in mode N on a slope - this will lead to jerking and possible belt breakage.

    On hybrid cars (Toyota Prius, Lexus RX) starting occurs automatically when you press the brake pedal, but if the battery is discharged, you may need to force start the internal combustion engine by holding the button POWER.

    Frequently asked questions about starting cars with automatic transmission

    Is it possible to start a car with an automatic transmission using a pushrod?

    No, it's strictly prohibited for most automatic transmissions! Unlike mechanics, an automatic machine requires oil pressure to start the engine, which is created only when the engine is running. The exception is some older models with a 3-speed automatic transmission (for example, Toyota Corolla 1990s), but even there the risk of torque converter failure exceeds 70%.

    If the battery is dead, use lighting a cigarette or starter charger. For cars with a variator (Nissan) even one attempt to start from a pusher is guaranteed to disable the box.

    Why can't you start the car in D or R?

    In the provisions Drive or Reverse gearbox mechanically connected to the wheels. When starting the engine, the torque converter receives a shock load, which leads to:

    • 🔧 Wear of friction discs (in the torque converter and clutch packs).
    • 🔄 Breakdown of the planetary gear (in classic machines).
    • 💥 Belt rupture (in CVTs).

    The exception is emergency situations, but even then, after starting, you must immediately move the selector to N.

    How long can you turn the starter when starting?

    Maximum time continuous operation of the starter - 5 seconds. After this, a pause is required. 30 secondsto cool down:

    • 🔥 Starter (overheating of windings).
    • 🔋 Battery (risk of plate sulfation).
    • ⚙️ Flywheel crown (teeth wear).

    On vehicles with Start/Stop system (for example, BMW 5 Series) the electronics themselves limit the scrolling time, but when starting manually, this rule applies strictly.

    Is it necessary to warm up the machine in the summer?

    Summer warming up is not necessary, but it is recommended to give the box 10–20 seconds after starting the engine so that the oil is distributed through the channels of the valve body. This is especially important:

    • 🌡️ At temperatures above +30°C (the oil liquefies and the pressure in the system drops).
    • 🚗 After long-term parking (more than 2 weeks).
    • 🔄 If you have to drive intensely (for example, overtaking with sudden acceleration).

    For CVTs (Nissan, Subaru) even in summer it is useful to hold the brake for the first 30 seconds after starting with the mode on D - this stabilizes the pressure in the system.

    What happens if you start a car with an automatic transmission without pressing the brake pedal?

    The consequences depend on the model:

    • 🔧 Works on most cars start blocker — the key simply will not turn to position START.
    • 💥 On cars without a blocker (for example, Ford Focus 2 before 2011) when started in mode D or R will happen jerk, which can damage:
      • Torque converter (repair cost from 30,000 ₽).
      • Planetary bearings (from 15,000 ₽).
      • Variator belt (from 50,000 ₽).

    On robots (DSG) electronics may block the box with an error PRND blinking - a reboot or diagnostics will be required.