Code No. U0100 Engine CAN timeout
Code No. U0101 T/M CAN timeout
Code No. U0114 4WD CAN timeout
Code No. U0126 SAS CAN timeout
Code No. U0141 ETACS CAN timeout
Code No. U1004 AS&G CAN timeout
Code No. U15A0 ACC/FCM ECU CAN timeout



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 - CAN Bus Diagnostics Table ).
  • If diagnosis codes U0100, U0101, U0114, U0126, U0141, U1004 and U15A0 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, CVT-ECU, 4WD-ECU, steering wheel sensor, ETACS-ECU, AS&G-ECU and ACC/FCM-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
  • CVT-ECU malfunction
  • 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
Code No. U1004
  • Wiring harness or connector failure of CAN bus line
  • Malfunction of AS&G-ECU
  • ASC-ECU malfunction
Code No. U15A0
  • Wiring harness or connector failure of CAN bus line
  • Malfunction of ACC/FCM-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 - CAN Bus Diagnostics Table ). On completion, go to Step 4.

STEP 2. Check whether the diagnosis code is reset.


Q. Is Code No. U0100, U0101, U0114, U0126, U0141, U1004 or U15A0 set?

Go to Step 3
The procedure is complete.

STEP 3. 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 4

STEP 4. M.U.T.-III diagnosis code


Use M.U.T.-III to check if the same diagnosis code (time-out) is set in the other ECU.

Q. Is any diagnosis code set?

YES (Code No. U0100 is set) : Replace the engine-ECU(Refer to GROUP 13A - Engine-ECU <4B1>, GROUP 13C - Engine-ECU <4J1>, GROUP 13D - Engine-ECU <4N1>), and then go to Step 5.
YES (Code No. U0101 is set) : Replace the CVT-ECU, and then go to Step 5.
YES (Code No. U0114 is set) : Replace 4WD-ECU, and then go to Step 5.
YES (Code No. U0126 is set) : Replace steering wheel sensor (Refer to ), and then go to Step 5.
YES (Code No. U0141 is set) : Replace the ETACS-ECU (Refer to GROUP 54A - ETACS .), and then go to Step 5.
YES (Code No. U1004 is set) : Replace the AS&G-ECU, and then go to Step 5.
YES (Code No. U15A0 is set) : Replace the ACC/FCM-ECU (Refer to GROUP 17 - Adaptive Cruise Control System (ACC) ), and then go to Step 5.
NO (No diagnosis code is set.) : The procedure is complete.

STEP 5. Check whether the diagnosis code is reset.


Erase the diagnosis code.

Q. Is Code No. U0100, U0101, U0114, U0126, U0141, U1004 or U15A0 set?

Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ).
The procedure is complete.