Chasing OBD2 U-Codes and Diaganos CAN Communication Problems. U0121 Lost communication with ABS.
bunch of indicator lamps are lit on the Dash, No power stearing, No ABS break, no Auto stop function work. bunch of U codes in the scan report. it was a Suzuki Hustler 2015 after collision repair.
in this video we diaganos U- Codes including U0121 Lost communication with ABS and Invalid CAN Data.
use Oscilloscope and observe the CAN high and CAN Low signal waveform to determine whether notwork is communicating.
just watch and get an idea.