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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Adaptive Front Lighting System Diagnosis (HEV) >> DTC B1304-87: Engine Speed Signal Fault >> DTC Inspection >> Monitor GDS Data

Monitor GDS Data

  1. Connect GDS to Data Link Connector (DLC).
  2. ENG "ON".
  3. IG "ON" 3. Monitor the "RPM" parameters on the GDS.

    Specification:  500 RPM above → ON

  4. Is parameter displayed within specifications?

    YES 

    • Fault is intermittent caused by poor contact in the sensor's and/or AFLS ECU's connector or was repaired and AFLS ECU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair " procedure.

    NO