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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Adaptive Front Lighting System Diagnosis (HEV) >> DTC B1639-81: LIN Communication Error DBL (Dynamic Bending Light) Left >> DTC Inspection >> Monitor GDS Data

Monitor GDS Data

  1. Connect GDS to Data Link Connector (DLC).
  2. IG key "ON", Engine "ON".
  3. Warm up the engine to normal operating temperature.
  4. Monitor "Diagnostic Trouble Codes (DTC)" and present of trouble code.
  5. Are any DTCs present?

    YES 

    NO 

    • Fault is intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and AFLS ECU memory is not cleared yet. Thoroughly check all connectors (and connections) for looseness, bending, corrosion, contamination or damage.
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