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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> ESC/AHB Diagnosis (HEV) >> DTC C1638-08: ACC Communication Error >> DTC Inspection >> Monitor DTC Status

Monitor DTC Status

  1. Connect GDS and select "Diagnostic Trouble Codes (DTC)" mode.
  2. Confirm that "DTC Readiness Flag" indicates "COMPLETED". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
  3. Read "DTC Status" parameter in DTC menu of the GDS.
    G13840081Courtesy of HYUNDAI MOTOR AMERICA
  4. Is parameter displayed "History (Not Present) fault"?

    YES 

    • Fault is intermittent caused by poor connection in sensor harness, was repaired and IBAU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair " procedure.

    NO 

    • Go to next step.