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Home >> Kia >> 2021 >> Niro Touring >> Repair and Diagnosis >> Accessories & Equipment >> Collision/Avoidance >> Autonomous Emergency Braking (AEB) System Diagnosis (HEV) >> DTC C1638-81: ACC/SCC Communication Error >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Monitoring CAN messages
  • Faulty IBAU system
  • Faulty SCC (FCA) system
  • Open or short in C-CAN communication line
Enable Condition
  • Ready (Ready signal received more than 2s)
  • Auxiliary battery voltage is between 9V and 16V
  • CAN communication line in normal condition
Threshold Value
  • When there are communication fail between SCC (FCA) and IBAU Module via C-CAN
Diagnosis Time
  • 0.5s
Fail Safe
  • SCC (FCA) Disengagement/Shutdown
  • SCC (FCA) Warning lamp turns ON
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