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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 80 (Active Air Flap Diagnosis (HEV)) >> DTC U0101: Lost Communication With TCM >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • CAN signal from TCM
  1. Poor Connection at each module connector.
  2. Open or Short in CAN communication line.
  3. Faulty TCU.
Enable conditions
  • IG "ON" or Engine "ON"
Threshold value
  • No receiving CAN signal from TCU
Diagnosis time
  • 2seconds.
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