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DTC U0431 ETACS (CAN message)
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C, CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
 
 
OPERATION
  • EPS-ECU communicates with the ETACS-ECU via the CAN bus lines.
 
 
 
TROUBLE JUDGMENT
Check Conditions
  • Ignition switch: ON position
Judgment Criterion
  • The DTC is set when abnormality is detected in the signal received from ETACS-ECU.
Fail Safe, Back Up Function
  • The EPS-ECU stores DTC No. U0431.
 
 
 
TROUBLESHOOTING HINTS
  • Malfunction of CAN bus line
  • Malfunction of the ETACS-ECU