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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Active Air Flap-Left Diagnosis (HEV) >> DTC U1009: Lost Communication With Radiator Shutter (Active Air Flap 2) >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
Main Action
  • Monitor CAN signal
  1. Open/Short in CAN communication line of the AAF_2
  2. Poor connection of each wire harness/connectors of the AAF_2 (Passenger seat)
Prerequisite Condition
  • 5 sec after turning ignition switch ON
Threshold Value
  • No receiving AAF_2 signal
Diagnosis Time
  • 5 sec
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