Code No. U0100 Engine time-out error
Code No. U0101 CVT time-out error
Code No. U0114 4WD time-out error
Code No. U0126 Steering wheel sensor time-out error
Code No. U0141 ETACS time-out error


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C, Trouble code diagnosis ).
  • If the diagnosis codes U0100, U0101, U0114, U0126, and U0141 are set in ASC-ECU, always diagnose the CAN bus line. If there is any fault in the CAN bus lines, an incorrect diagnosis code may be set. In this case, the set diagnosis code is not highly reliable.
  • Before replacing the ECU, ensure that the communication circuit is normal.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if ASC-ECU cannot receive the signal sent from other ECU for a certain period.

OPERATION
ASC-ECU communicates with the engine ECU, 4WD-ECU, the steering wheel sensor, and ETACS-ECU via the CAN bus lines.

PROBABLE CAUSES
Code No. U0100
  • Wiring harness or connector failure of CAN bus line
  • Engine ECU malfunction
  • ASC-ECU malfunction
Code No. U0101
  • Wiring harness or connector failure of CAN bus line
  • ASC-ECU malfunction
Code No. U0114
  • Wiring harness or connector failure of CAN bus line
  • 4WD-ECU malfunction
  • ASC-ECU malfunction
Code No. U0126
  • Wiring harness or connector failure of CAN bus line
  • Steering wheel sensor malfunction
  • ASC-ECU malfunction
Code No. U0141
  • Wiring harness or connector failure of CAN bus line
  • Malfunction of ETACS-ECU
  • ASC-ECU malfunction

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis
Use M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 4.

STEP 2. M.U.T.-III other system diagnosis code
Use M.U.T.-III to check that other diagnosis code is set in the ECU corresponding to the relevant diagnosis.

Q. Is other diagnosis code set?
Troubleshoot for the relevant diagnosis code.
Go to Step 3.

STEP 3. M.U.T.-III diagnosis code
Use M.U.T.-III to check that the diagnosis code is set in ASC-ECU.

Q. Is the diagnosis code set?
YES (diagnosis code No. U0100 is set) : Replace the engine ECU, and then go to Step 4.
YES (diagnosis code No. U0101 is set) : Replace the CVT-ECU, and then go to Step 4.
YES (diagnosis code No. U0114 is set) : Replace 4WD-ECU, and then go to Step 4.
YES (diagnosis code No. U0123 is set) : Replace the steering wheel sensor, and then go to Step 4.
YES (diagnosis code No. U0141 is set) : Replace the ETACS-ECU, and then go to Step 4.
NO (No diagnosis code is set.) : This diagnosis is complete.

STEP 4. Check whether the diagnosis code is reset.

Q. Is the diagnosis code No. U0100, U0101, U0114, U0126, or U0141 set?
Replace the ASC-ECU.
This diagnosis is complete.