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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 78 (Telematics Unit Diagnosis (HEV)) >> DTC B2800: MM CAN Bus Off Error >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • Check for short circuit of CAN High/Low line.
  1. Wire of MM CAN between TMU and Head Unit short to ground or battery.
  2. Head Unit failure
  3. TMU failure.
Enable Conditions
  • ACC ON
  • Battery voltage is between 9V and 16V
Threshold value
  • CAN line is in the below status
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