LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hyundai >> 2017 >> Elantra Value Edition >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Cluster Module Diagnosis >> DTC B1040-55: LKAS/LDWS Present Error - Coding Code Error >> DTC Inspection >> Monitoring DTC Status
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Monitoring DTC Status

  1. Connect GDS to "DATA LINK CONNECTOR (DLC)".
  2. IG key "ON", Engine "OFF".
  3. Select "Diagnostic Trouble Codes (DTC)  " with GDS.
  4. Monitor the diagnostic trouble code and present of the trouble code.
  5. Erase the DTC and operate the vehicle within DTC Enable conditions in General information.
    Fig 1: Scantool Display - Diagnostic Trouble Codes
    G12027898Courtesy of HYUNDAI MOTOR AMERICA
  6. Is the DTC output again?

    YES 

    NO 

    • Fault is intermittent caused by poor contact in LKAS ("LANE KEEPING ASSIST CONTROL MODULE")'s connector or CLU memory was not cleared after repair.

      → Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

      → Repair or replace as necessary, go to "VERIFICATION OF VEHICLE REPAIR " procedure.