Code No. U0141: ETACS CAN Timeout

  • 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.
  • Whenever the ECU is replaced, ensure that the communication circuit is normal.
  • When the diagnosis code No.C1785 is set in ACC/FCM-ECU, the diagnosis code may also be set in ETACS-ECU. When the diagnosis code is set in ETACS-ECU, perform the diagnosis of the diagnosis code for ETACS-ECU first.
  • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in GROUP 54A, Immobilizer System - How to Register Key ID .)


ACC/FCM-ECU receives the vehicle information stored in ETACS-ECU via CAN bus lines.


This diagnosis code is set when the abnormality below is detected:



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

Use M.U.T.-III to perform the CAN bus diagnosis.

Q. Is the check result normal?

Go to Step 2
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ).

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

Check the ETACS diagnosis code (Refer to GROUP 54A - Troubleshooting ).

Q. Is the diagnosis code set?

Perform the relevant troubleshooting.
Go to Step 3

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

Check if the diagnosis code No. U0141 is set to other ECU.

Q. Is diagnosis code set?

Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ).
Go to Step 4

STEP 4. Check whether the diagnosis code is reset.

Q. Is diagnosis code No.U0141 set?

Replace the ACC/FCM-ECU (Refer to ).
Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).