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DTC U0141: ETACS CAN Timeout
 
 
caution
  • If the DTC U0141 stored 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 stores 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.-III), diagnose the CAN bus line
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III). 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.-III), read the ETACS-ECU diagnostic trouble code
Check again if the DTC is stored to the ETACS-ECU.
Is the DTC stored?
Diagnose the ETACS-ECU. Then go to Step 4.
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-III), read diagnostic trouble code No. U0141 for other system.
Check if the DTC U0141 stored in other system.
Is the DTC stored?
Replace the ETACS-ECU (Refer to GROUP 54A, ETACS - ETACS-ECU ).
Go to Step 4.
 
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is stored to the SRS-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is stored.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC stored?
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 ).