Car won't start: battery, starter or fuel?

汽车无法启动：电瓶、启动机还是供油问题？

Use sounds, dashboard behaviour and a few safe checks to decide the next step without repeatedly cranking the engine.

通过声音、仪表表现和几个安全检查判断下一步，避免反复强行点火。

Beginner diagnosis · 10–15 min · Phone light, owner manual

1. Before you try again

Put the transmission in Park or Neutral, apply the parking brake and switch off lights, air-conditioning and accessories.

Check that the key or start button is recognised and the steering lock is released.
Do not crank for more than about 10 seconds at a time; wait at least 30 seconds between attempts.

挂入 P 挡或空挡、拉紧手刹，并关闭灯光、空调和其他用电设备。

The sound and dashboard give the safest first clues.

No lights and no sound: suspect a flat battery, loose terminal or main electrical supply.
Rapid clicking: the 12V battery is usually too weak to crank.
One solid click but no crank: stop; the starter circuit or engine may need professional diagnosis.
Engine cranks normally but will not fire: do not keep trying. Fuel, ignition or immobiliser diagnosis is needed.

声音和仪表是最安全的初步线索。

Only attempt a jump-start when the vehicle manual allows it and the battery is a conventional, undamaged 12V battery.

If lights are bright and the engine cranks normally, roadside assistance is safer than a jump-start.
If a warning says key not detected, try the manual emergency key position or spare key.
Record the sound and dashboard message for the mechanic.

只有在车辆手册允许、且电瓶为完好的普通 12V 电瓶时，才尝试搭电。

Stop for smoke, a burning smell, leaking fuel, severe cable heat, a swollen battery or a mechanical banging sound.

出现烟雾、焦味、燃油泄漏、线缆异常发热、电瓶鼓包或机械撞击声时立即停止。