Code No.U0019 Bus off (CAN-B)


caution
  • If diagnosis code No. U0019 is set, be sure to diagnose the CAN bus line.
  • When replacing the ECU, always check that the communication circuit is normal.

DIAGNOSIS FUNCTION



JUDGEMENT CRITERIA



PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Check whether the diagnosis code is reset.



(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?





STEP 2. M.U.T.-III CAN bus diagnostics



Q. Is the check result normal?