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 2.5 V or 2) HIGH and LOW signal are fixed at 3.5 V and 1.5 V, respectively, it is due to communication error between modules.

5.

Is the measured waveform normal ?

▶ Go to "Verification of Vehicle Repair".

▶ Replace the module which generates poor communication waveform, and go to "Verification of Vehicle Repair".

Яндекс.Метрика