Code No.U1073 Bus-off


caution
  • If diagnosis code No. U1073 is set in the CAN converter-ECU, diagnose the CAN bus lines.
  • Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

TROUBLE JUDGMENT



COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of the CAN converter-ECU
  • Malfunction of wiring harness or connector

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics



Q. Is the check result normal?





STEP 2. Check whether the diagnosis code is reset.



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

Q. Is the diagnosis code set?