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DTC U1073: Bus-off
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code (DTC) may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
  • If the EPS-ECU sets DTC U1073, diagnose the CAN bus lines. If there is any fault in the CAN bus lines, an incorrect diagnostic trouble code may be set.
  • Before replacing ECU, ensure that the communication circuit is normal.
 
 
TROUBLE JUDGMENT
This code is set when the EPS-ECU has ceased the CAN communication (bus off). Then, if a penalty mode is entered after approximately five minutes, regular data transmission will be cancelled.
 
 
COMMENT ON TROUBLE SYMPTOM
The wiring harness, connector, or EPS-ECU may be faulty.
 
 
PROBABLE CAUSES
  • Defective wire(s) or connector(s) in the CAN bus lines
  • Malfunction of the EPS-ECU