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.

TROUBLE JUDGEMENT


If the signal from ETACS-ECU cannot be received, the gateway-ECU sets diagnosis code No. U0141.

JUDGEMENT CRITERIA


With the ignition switch is at "ON" position, diagnosis code No. U1190 is not set, if the communication with ETACS-ECU cannot be established for 2500 ms or more, the gateway-ECU determines that a problem has occurred.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


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


Use the 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 ). Repair the CAN bus line and go to Step 6.

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


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

Q. Is the diagnosis code set?

Diagnose the ETACS-ECU (Refer to GROUP 54A - ETACS, Troubleshooting ).

Go to Step 3.

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


Check if a diagnosis code, which relates to CAN communication-linked systems below, is set.

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.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code is not set again.

Q. Is the diagnosis code set?

Replace ETACS-ECU (Refer to GROUP 54A - ETACS ) and then go to Step 6.

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

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 ignition switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code is not set again.

Q. Is the diagnosis code set?

Replace gateway-ECU (Refer to ) and then go to Step 6.

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

STEP 6. Check whether the diagnosis code is set again.


Recheck if the diagnosis code is set.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code is not set again.

Q. Is the diagnosis code set?

Go to Step 1.

The procedure is complete.