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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 U0100: Lost Communication With ECM/PCM 'A' (C-CAN) >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • CAN signal confirmation
  1. Poor connection at each module connector.
  2. Open or short in CAN communication.
  3. Faulty ENG ECU.
Enable conditions
  • IG "ON" or Engine "ON"
Threshold value
  • No signal regarding EMS 1/2/5 CAN message
Diagnosis time
  • 2seconds.
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