Component Inspection

Component Inspection

Check CAN communication waveform generation
1. Ignition "OFF"
2. Connect each channel scope to CAN-HIGH terminal and CAN-LOW terminal.
3. Ignition "ON" after disconnecting only PCM to CAN BUS.
4. Ignition "ON" after disconnecting only ABS/ESC ECM to CAN BUS.
5. Ignition "ON" after disconnecting only Instrument Cluster to CAN BUS.
A. Specification : At Ignition "ON", the waveform same as "Signal Waveform & Data" of above signal waveform.
** 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.








6. Does correct waveform generate from each module ?
YES
1) Go to "Verification of Vehicle Repair".
NO
1) Replace the module which generates poor communication waveform, and go to "Verification of Vehicle Repair".