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Home >> Hyundai >> 2017 >> Azera Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System Diagnosis >> DTC U0001: High Speed CAN Communication Bus Off >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • CAN BUS OFF
  • Open or short in CAN line
  • PCM/TCM
Enable Conditions
  • Time after TCM turns on >0.5sec
  • Battery voltage > 10V
  • Input speed > 400rpm
Threshold value
  • BUS OFF flag of CAN Controller ON
Detecting Time
  • More than 1sec
Fail safe
  • Engine speed:3000 rpm
  • Throttle: 50%
  • Engine torque: Max*0.7

* Inhibit TIME OUT happen at BUS OFF happen.
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