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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Adaptive Front Lighting System Diagnosis (HEV) >> DTC B1220-87: Speed Signal Fault >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Signal monitoring
  1. CAN communication circuit open/short
  2. Wheel speed sensor circuit open/short
  3. Faulty in wheel speed sensor
  4. Faulty VDC (ESP)
Enable Conditions
  • IG ON
Threshold Value
  • Wheel speed sensor signal is invalid value CAN communication signal not output from ABS (ESC)
Detecting Time
  • 1 second
Check Lamp
  • No
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