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DTC U0141 ETACS CAN timeout
 
 
caution
  • If DTC U0141 is set, diagnose the CAN bus lines.
  • When replacing the ECU, always check that the SRS circuit is normal.
 
 
FUNCTION
If the signal from ETACS-ECU cannot be received, the SRS-ECU sets the DTC U0141.
 
 
TROUBLE JUDGMENT
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.
 
 
PROBABLE CAUSES
  • Malfunction of CAN bus line
  • Malfunction of SRS-ECU
  • Malfunction of the ETACS-ECU
 
 
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 the ignition switch to the "LOCK" (OFF) position 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 the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
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), check whether the other system DTC is set.
Check the ETACS-ECU DTC.
Is the DTC set?
Diagnose the ETACS-ECU (Refer to GROUP 54A - ETACS, Diagnosis ).
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-IIISE), check whether the other system DTC is set.
Check the combination meter DTC U1109.
Is the DTC set?
Go to Step 4
Go to Step 5
 
STEP 4. Recheck the DTC.
Check the DTC.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check the DTC.
Is the DTC set?
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS, ETACS-ECU ). After replacing the combination meter, carry out the CAN bus diagnostics.
A poor connection, open circuit or other intermittent malfunction in the CAN bus line between the ETACS-ECU and the SRS-ECU (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
 
STEP 5. Recheck the DTC.
Check the DTC.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check the DTC.
Is the DTC set?
Replace the SRS-ECU (Refer to ). After replacing the combination meter, carry out the CAN bus diagnostics.
A poor connection, open circuit or other intermittent malfunction in the CAN bus line between the SRS-ECU and the ETACS-ECU (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).