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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 U1008: Lost Communication With Radiator Shutter (Active Air Flap) (C-CAN) >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • MCU CAN signal confirmation
  1. Open/Short in CAN communication line of the AAF_1
  2. Poor connection of each wire harness/connectors of the AAF_1 (Driver's seat)
Enable Conditions
  • 5 seconds after turning ignition switch ON
Threshold Value
  • No receiving AAF_1 signal
Diagnosis Time
  • 5 seconds
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