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DTC U1073: Bus-Off
 
 
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.
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
 
 
DTC SET CONDITIONS
The DTC is set when AWC-ECU ceases (bus-off).
 
 
PROBABLE CAUSES
  • The CAN bus line is defective.
  • Malfunction of AWC-ECU
  • ECU malfunction of other system

 
 
DIAGNOSIS
STEP 1. Scan tool (M.U.T.-IIISE) CAN bus diagnostics.
Use scan tool (M.U.T.-IIISE) to perform the CAN bus diagnosis.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Diagnostic Trouble Code Chart ).
 
STEP 2. Check whether the DTC is set again.
Is the DTC U1073 set?
Replace the AWC-ECU (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).