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Engine controlWhen the unit fails to drive,Binance download the engine control unit (ECU) of the vehicle is the "brain" of the vehicle's engine. It controls functions such as engine fuel injection, ignition, and emission system. However, when the ECU fails, the vehicle may not be able to start and other problems. I. The function of the engine control unit. The engine control unit is one of the important controllers on automobiles. It is responsible for detecting, measuring and calculating multiple engine parameters, real-time adjustment and control, and ensuring that the engine works under the right condition. If there is a problem with the ECU, it will cause the engine to work unstable or fail to start. II. The reason for the failure of the engine control unit 1. Circuit short-circuit or broken-circuit ECU will send electrical signals to control fuel injection, pointFire and other engine operations, if the circuit is short-circuited or broken, the signal cannot be sent normally, thus affecting the normal operation of the engine. In this case, it is usually necessary to replace or repair the ECU circuit. Two. There is an embedded program in the internal storage of the program error ECU to control the engine. If there is an error in the program, it will cause the ECU to not work properly, causing the engine to fail to start or other abnormal situations. 3. The power supply failure ECU needs a power supply to work. If the ECU power supply fails, the engine operation cannot be controlled smoothly. In general, checking whether the power line is normal can solve the problem. Four. The capacitor is aged inside the ECU, and there are multiple capacitors used to store and balance charges. If the capacitor ages or fails, it will cause the ECU to fail.III. The main manifestations of ECU failure 1. If the vehicle fails to start or starts slowly, if there is a problem with the ECU, the engine will not be able to start normally, or it will take a long time to start. This is the most common manifestation of ECU failure. Two. Unstable engine operation. When the ECU cannot control the engine normally, it will lead to unstable engine operation, shaking, insufficient power or uneven speed. 3. The yellow or red fault light is on. If there is a problem with the ECU, the fault light of the vehicle will light up. Usually, the yellow light means that the ECU is faulty, and the red light means that there is a more serious failure. IV. How to solve the problem of ECU failure 1. Replace the ECU. If the ECU is damaged and cannot be repaired, the only solution is to replace the ECU.Before replacing the ECU, it is necessary to clear the data previously stored in the old ECU to ensure that the new ECU can work normally. Two. Protect the circuit board during the repair process to better protect the ECU circuit board. It is recommended that electrical technicians wear anti-static gloves during the repair process and avoid direct contact with the circuit board. 3. Regular maintenance and regular car maintenance will reduce the failure rate of ECU. It is recommended that car owners check the ECU at least once a year to ensure that it works properly. Conclusion ECU is one of the important controllers of the vehicle engine. It controls the functions of fuel injection, ignition and emission system of the engine. When the ECU fails, the vehicle may not start or run unstably. Therefore, in order to improve driving safety, car owners should regularly maintain and check the ECU to ensure that the engine works normally.If the ECU fails, you need to find professional and technical personnel for repair or replacement in time.

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