Correct Method for Warming Up and Starting an Automatic Transmission Vehicle
4 Answers
When entering the vehicle, the owner only needs to carry the key and stand within the detector range (within 2 meters), then directly open the door for convenient access to the car. After the driver is seated, press and hold the brake pedal, then gently press the one-touch start button. At this point, the vehicle's systems will power on and enter the self-check procedure. Observe if there are any warning alerts. While keeping the brake pedal depressed, shift the gear to N (Neutral) position, then press the one-touch start button again to start the engine. Allow the engine to warm up slightly for about 30 seconds. Observe the surrounding conditions of the vehicle, turn on the left turn signal, press the brake pedal to shift to N or D (Drive) gear, release the handbrake, then slowly release the brake pedal to start moving.
In winter, I turn on the power for a self-check before driving and wait for the dashboard lights to go off before starting the engine. After starting, I keep the car idling for about 30 seconds, or up to a minute when it's extremely cold in the north. During this time, I check the dashboard for any warning lights and also fasten my seatbelt and adjust the mirrors. Once the RPM drops from around 1200 to about 800, I shift to D gear and start driving gently for the first two or three kilometers without pressing the accelerator too hard. In summer when temperatures are high, there's usually no need to deliberately warm up the car—I can start driving about 10 seconds after ignition, but still drive gently at the beginning. The key isn't how long you wait idling, but avoiding putting too much strain on the engine during the initial driving phase.
After repairing cars for over a decade, I've noticed many people misunderstand warm-up procedures. The key is watching the coolant temperature gauge, folks! For automatic transmission vehicles, you can start driving as soon as the temperature needle begins to rise - no need to wait until it reaches the midpoint. The high RPM during cold starts is normal fuel injection programming protecting the catalytic converter. Just drive gently for the first few minutes to allow oil to properly lubricate engine components. Idling for warm-up beyond one minute actually promotes carbon buildup and wastes fuel. Here's a pro tip: Low-speed driving while warming up is more efficient.
I was shocked when my driving instructor said that idling to warm up the car is harmful! Later, I understood the principle: modern fuel-injected cars can drive immediately after ignition. Waiting for about 30 seconds is mainly to allow the oil to circulate to the turbocharger. The key to protecting the engine is to avoid stomping on the throttle when it's cold. My routine is: press the brake and start the engine → shift to N gear → wait for the RPM to stabilize (about 20 seconds) → shift to D gear and drive off. Keep the RPM below 2000 until the coolant temperature reaches 50°C. Transmission oil warms up slower than coolant, so aggressive driving within the first 10 minutes is particularly damaging to the transmission.
