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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 U0164: Lost Communication With HVAC Control Module >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • FATC CAN signal confirmation
  1. Open or short in CAN communication
  2. Faulty FATC.
Enable conditions
  • 2 seconds later after IG KEY ON
Threshold value
  • No CAN message from FATC
Diagnosis time
  • 0.5 seconds.
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