Check whether the battery has power, use a meter to measure the voltage at both ends
Check whether the electrical connectors are in good contact, and check whether the connectors are corroded
The third step: Check whether the ignition is normal, you can use the flashover method to check. If carbon deposits occur in the spark plug, the voltage will be reduced and the spark cannot be fired. In addition, if the wire of the coil is not in good contact, loose, open, or the coil is not tight, it will cause the voltage to decrease, the spark of the spark plug will become weak, and affect the starting.
Fourth step: Check the pressure in the cylinder, and use an engine analyzer to analyze its waveform. Mainly observe the size of the breakdown voltage of the waveform and the duration of the spark.
Step 5: Check the engine electronic control unit (ecu). The electronic control unit (ecu) has a self-diagnostic function. When the engine microcomputer control system is working, the self-diagnostic system continuously monitors the input signal of each sensor and the feedback signal of each actuator feedback circuit. If there is an abnormality, it means that the microcomputer control system is malfunctioning. , The fault self-diagnosis stores the fault code corresponding to this fault in the memory, and at the same time lights up the "check" fault indicator on the meter to indicate that the microcomputer control system is faulty and should be reduced in time.
