What are the reasons for no response when starting a smart engine?

[SanEmmanuel]

When a smart engine shows no response during startup, it is generally caused by the following reasons: 1. Low battery voltage: You can turn on the headlights and some electrical devices and observe whether the dashboard and interior lighting dim significantly during the startup process. If confirmed, it indicates insufficient battery voltage, which cannot drive the engine to reach the required starting speed. 2. Excessive carbon buildup in the intake pipe: Excessive carbon deposits on components such as the throttle valve and idle motor prevent the engine's air-fuel mixture from reaching the required ratio, causing the vehicle to fail to start. 3. Insufficient fuel supply in the fuel system: This phenomenon is similar to excessive carbon buildup in the intake pipe, as it also prevents the engine from achieving the required air-fuel mixture ratio, resulting in the vehicle's failure to start. 4. Faulty starter motor or related wiring: The magnetic coil cannot maintain an engaged state and fails to provide the starting torque, leading to the engine's inability to start. 5. Ignition system failure: This directly causes the engine to fail to start.