Epc lights up after self-inspection, but does not light up after startup. Is it normal?

EPC is an engine electronic power control system, also called electronic throttle. After the key door is opened, the vehicle starts self-inspection, and the EPC indicator light will light up for a few seconds and then go out. If the vehicle does not go out after starting, it means that the mechanical and electronic system of the vehicle has failed.

In EPC system, the former accelerator cable is replaced by the sensor of pedal device, and the engine control unit (ECU) calculates the optimal target accelerator opening according to the position data fed back by the sensor of pedal device, and sends a signal to the accelerator drive motor to make the accelerator rotate to this angle.

Extended data

Advantages of electronic throttle

1, the biggest advantage of electronic throttle control system is that it can achieve the best torque output of the engine in the whole range.

2. Accurately control the throttle opening. ECU first judges and processes various working condition information and sensor signals, then calculates the optimal throttle opening, and then the driving motor controls the throttle to reach the corresponding throttle opening.

3. It has high vehicle running reliability. The electronic throttle control system is designed with redundant sensors. From the control point of view, the system can run normally with only one sensor, but the redundant design allows two sensors to detect each other and identify one sensor in time when it fails, which greatly increases the reliability of the system and ensures the safety of driving.

Baidu Encyclopedia -EPC (Engine Electronic Power Control System)

Baidu encyclopedia-electronic throttle