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Home >> Hyundai >> 2012 >> Elantra GLS, Automatic Trans >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System (Abs)/Electronic Stability Control (ESC) System >> DTC C1503: TCS_ESC (ESP) Switch error >> Inspection/Repair >> Component Inspection

Component Inspection

  1. IG "OFF".
  2. Disconnect the ESC (ESP) switch connector.
  3. Measure resistance between power terminal and signal terminal of the ESC (ESP) switch connector.
  4. Measure waveform between signal terminal of the wheel speed sensor harness connector and chassis ground with oscilloscope.

    Specification:  Approx. below 1Ω - (In case of pressing the ESC (ESP) switch)

    Approx. ∞ Ω - (In case of not pressing the ESC (ESP) switch)

    Fig 1: Measuring Waveform Between Signal Terminal Of Wheel Speed Sensor Connector And Chassis Ground
    G07272008Courtesy of HYUNDAI MOTOR CO.
  5. Is the measured resistance within specifications?

    YES 

    • Fault is intermittent caused by poor connection in ESC (ESP) switch harness and/or HECU's connector. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Substitute with a known-good ESC (ESP) switch and check for proper operation. If problem is corrected, replace ESC (ESP) switch and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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