Code No.U1120 Bus line (CAN-C) low input
Code No.U1121 Bus line (CAN-C) high input


JUDGMENT CRITERIA




  • If the CAN bus line voltage is 0.3 V or less, the diagnosis code No. U1120 is set.
  • If the CAN bus line voltage is 4.7 V or more, the diagnosis code No. U1121 is set.

PROBABLE CAUSES



  • Malfunction of CAN bus line

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?