Component Inspection

Component Inspection

Check CAN communication waveform generation
1. IG "OFF" and connect each channel scope to CAN-HIGH terminal and CAN-LOW terminal.
2. IG "ON" after disconnecting only ECM to CAN BUS.
3. IG "ON" after disconnecting only ABS/ESC ECU to CAN BUS.
4. IG "ON" after disconnecting only Instrument Cluster to CAN BUS.

Specification : At Ignition "ON", the waveform is same as the one of "Signal Waveform & Data".





** Different from "Signal Waveform & Data", if 1) both CAN HIGH and LOW signal are fixed at 2.5V or 2) HIGH and LOW signal are fixed at 3.5V and 1.5V, respectively, it is due to communication error between modules.




5. Is the measured waveform normal ?