Code No. U0141 ETACS CAN timeout


caution
  • If the diagnosis code No. U0141 is set, be sure to diagnose the CAN bus line.
  • Before replacing the ECU or sensor, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
  • 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 Immobilizer System - How to Register Key ID .)
  • When the illuminated licence plate is installed, the sensors may not operate because of noise from the plate. (When the ultrasonic noise is received, the bass toned buzzer sound continuously. When the ultrasonic noise stops, the normal operation will be resumed immediately.)

DIAGNOSTIC FUNCTION


The corner sensor/back sensor-ECU sets diagnosis code No.U0141 when it cannot receive signals from the ETACS-ECU.

JUDGEMENT CRITERIA


The corner sensor/back sensor-ECU cannot receive the signal from the ETACS-ECU via the CAN bus line.

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 GROUP 54C - Troubleshooting - CAN Bus Diagnosis Chart ).

STEP 2. Check the M.U.T.-III Diagnosis code for other systems


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

Q. Is the diagnosis code set?

Go to Step 3.

Go to Step 4.

STEP 3. Diagnosis code recheck


Check again if the diagnosis code is set to the corner sensor/back sensor-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
(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 in the CAN bus line between the corner sensor/back sensor-ECU and the ETACS-ECU (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

STEP 4. Diagnosis code recheck


Check again if the diagnosis code is set to the corner sensor/back sensor-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace the corner sensor/back sensor-ECU.

A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the corner sensor/back sensor-ECU and the ETACS-ECU (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).