The general steps for diagnosing automatic engine shutdown faults are nine in number; what is the fourth one?

Before diagnosing automatic engine stalling faults, safety must first be ensured: pull the vehicle over and engage the parking brake, then open the hood and make sure the engine is cold. Check fault codes: Use a diagnostic tool or OBD scanner to connect to the vehicle's diagnostic port and read the fault codes. The fault codes can provide clues about the cause of the stalling. Check the fuel system: Inspect the fuel pump, fuel filter, and fuel injectors to ensure they are working properly, and confirm that the fuel supply is sufficient with no blockages or leaks. Check the ignition system: Inspect the ignition coils, spark plugs, and ignition wires to ensure they are functioning correctly, verify that the spark plug gaps are correct, and confirm that the ignition system has no electrical faults. Check power circuits and sensor connections: Verify that the power circuits of the engine control unit (ECU) are properly connected, and check the connections of sensors such as the oxygen sensor and throttle position sensor. Check the mass air flow sensor: A faulty mass air flow sensor can cause the engine to stall. Inspect the sensor's operating condition to ensure it is not contaminated or damaged. Check the exhaust system: Inspect the exhaust pipe for blockages and verify that the exhaust valves are working properly. Issues in the exhaust system can also lead to engine stalling. Check the cooling system: Ensure the coolant level is normal and that the cooling system has no leaks or faults, to prevent engine stalling due to overheating. Check the drivetrain system: Drivetrain faults, such as clutch problems or transmission failures, can also cause the engine to stall. Inspect the drivetrain's operating condition to ensure there are no faults. Perform a comprehensive analysis: Based on the previous inspection results, conduct a comprehensive analysis to identify the possible cause of the stalling. If the cause cannot be determined, further inspection or consultation with a professional technician may be necessary.