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DTC U0141: ETACS CAN Timeout
 
 
caution
  • If the DTC U0141 set in the SRS-ECU, diagnose the CAN main bus lines.
  • Whenever the ECU is replaced, ensure that the communication circuit is normal.
 
 
DIAGNOSTIC FUNCTION
If the signal from ETACS-ECU cannot be received, the SRS-ECU sets the DTC U0141.
 
 
JUDGMENT CRITERIA
Because of the CAN-C bus circuit malfunction, if SRS-ECU becomes unable to perform the normal data transmission, SRS-ECU determines that an abnormality is present.
 
 
TROUBLESHOOTING HINTS
  • The CAN bus line may be defective
  • The ETACS-ECU may be defective
  • The SRS-ECU may be defective
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the scan tool ."
(2) Turn on the power supply mode of the electric motor switch.
(3) Diagnose the CAN bus line.
(4) Turn off the power supply mode of the electric motor switch.
Is the CAN bus line found to be normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C, Diagnosis ).
 
STEP 2. Using scan tool (M.U.T.-IIISE), read the ETACS-ECU DTC
Check again if the DTC is set in the ETACS-ECU.
Is the DTC set?
Diagnose the ETACS-ECU. Then go to Step 4.
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-IIISE), read DTC No. U0141 for other system.
Check whether an ETACS "time-out" related DTC is set in other ECUs (Refer to GROUP 54C - CAN-Related Diagnosis Code Table ).
Is the DTC set?
Replace the ETACS-ECU (Refer to GROUP 54A, ETACS - ETACS-ECU ).
Go to Step 4.
 
STEP 4. Recheck for DTC.
Check again if the DTC is set.
(1) Erase the DTC.
(2) Turn on the power supply mode of the electric motor switch.
(3) Check if the DTC is set.
(4) Turn off the power supply mode of the electric motor switch.
Is the DTC set?
Replace the SRS-ECU.
There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).