Code No.U0100 Engine CAN Timeout
Code No.U0101 T/M CAN Timeout
Code No.U0121 ASC CAN Timeout
Code No.U0126 SAS CAN Timeout
Code No.U0141 ETACS CAN Timeout


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, always diagnose the CAN bus lines.
  • Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
  • When the steering wheel sensor is replaced, always carry out calibration to make ASC-ECU learn the neutral point. (Refer to GROUP 35C - On-vehicle service ).

DIAGNOSTIC FUNCTION



OPERATION



PROBABLE CAUSES


Code No.U0100
  • Malfunction of the CAN bus
  • Malfunction of the engine-ECU
  • Malfunction of the AFS-ECU
Code No.U0101
  • Malfunction of the CAN bus
  • Malfunction of the A/T-ECU, CVT-ECU or TC-SST-ECU
  • Malfunction of the AFS-ECU
Code No.U0121
  • Malfunction of the CAN bus
  • Malfunction of the ABS-ECU or ASC-ECU
  • Malfunction of the AFS-ECU
Code No.U0126
  • Malfunction of the CAN bus
  • Malfunction of the steering wheel sensor
  • Malfunction of the AFS-ECU
Code No.U0141
  • Malfunction of the CAN bus
  • Malfunction of the ETACS-ECU
  • Malfunction of the AFS-ECU

DIAGNOSIS PROCEDURE


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



Q. Is the check result normal?





STEP 2. M.U.T.-III other system diagnosis code



Q. Is the diagnosis code set?





STEP 3. M.U.T.-III diagnosis code



Q. Is the diagnosis code set?













STEP 4. 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 diagnosis code No. U0100, U0101, U0121, U0126, or U0141 set?