DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U1104: Lost Communication with Driving Support ECU (03/2012 - 07/2012): Procedure

CHECK FOR DTC (CAN COMMUNICATION SYSTEM)
1. Clear the DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .
2. Check for DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .
  OK
  
  DTC is not output.
NG → See step 3

OK → See step 2
CHECK INTERMITTENT PROBLEMS. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - 07/2012]
GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - 07/2012]