If the signal waveform is normal, it means that the interlock circuit between the measurement point and the vehicle controller VCM is normal. If the signal voltage is low, it means that the interlock circuit between the measurement point and the vehicle controller VCM is faulty. Downstream troubleshooting.
The detection signal of the high-voltage interlock system is a duty cycle signal, so it is impossible to use a multimeter to judge whether the high-voltage interlock system is normal by measuring the voltage signal or on-off. Generally, the waveforms on the interlock input line and output line of the high-voltage component are measured at the same time. , to judge whether the interlock circuit is normal.
The above are the detection and processing methods for insulation resistance faults, voltage/current faults and high-voltage interlock circuit faults in high-voltage systems.