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Home >> Hyundai >> 2016 >> Sonata Plug-In Hybrid >> Repair and Diagnosis >> Brakes >> Traction Control >> Electronic Stability Program/Active Hydraulic Boost System Diagnosis (PHEV) >> DTC C1503-01: TCS/ESC Switch Circuit 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.
    Fig 1: Display - TCS/ESC Switch Circuit Error Screen
    G11638131Courtesy of HYUNDAI MOTOR AMERICA
  4. Is parameter displayed "History (Not Present) fault"?

    YES 

    • Fault is intermittent caused by poor connection in brake light switch line and/or IBAU's connector or was repaired and IBAU memory was not cleared. Go to "Verification of Vehicle Repair " procedure.

    NO 

    • Go to next step.
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