Code No.U0141 ETACS CAN timeout


caution
  • If diagnosis code No. U0141 is set, be sure to diagnose the CAN bus line.
  • When replacing the ECU, always check that the communication circuit is normal.

DIAGNOSIS FUNCTION


If no signal from ETACS can be received, KOS&OSS-ECU sets diagnosis code No. U0141.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


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


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 line (Refer to GROUP 54C - Troubleshooting ).

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


Check if any diagnosis code is set in the ETACS-ECU.

Q. Is the diagnosis code set?

Perform troubleshooting for ETACS (Refer to GROUP 54A - ETACS - Troubleshooting ).

Go to Step 3.

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


Check if diagnosis code No.U0141 is set in the combination meter.

Q. Is the diagnosis code set?

Go to Step 4.

Go to Step 5.

STEP 4. Check whether the diagnosis code is set again.


Recheck if the diagnosis code is set in the KOS&OSS-ECU.
(1)Erase the diagnosis code.
(2)Turn the power supply mode of the engine switch from "OFF" to "ON".
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace the ETACS-ECU.

A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the ETACS-ECU and the KOS&OSS-ECU(Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

STEP 5. Check whether the diagnosis code is set again.


Recheck if the diagnosis code is set.
(1)Erase the diagnosis code.
(2)Turn the power supply mode of the engine switch from "OFF" to "ON".
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace KOS&OSS-ECU and register the ID codes (Refer to ).

A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the ETACS-ECU and the KOS&OSS-ECU (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to cope with Intermittent Malfunction ).