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Home >> Hyundai >> 2017 >> Accent Value Edition >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Antilock Brake System/Electronic Stability Control System Diagnosis >> DTC C1503: TCS/ESC(ESP) Switch error >> Component Inspection >> ESC(ESP) switch Check
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ESC(ESP) switch Check

  1. IG "OFF".
  2. Disconnect the ESP(ESC) switch connector.
  3. Measure resistance between power terminal and signal terminal of the ESP(ESC) 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 ESP(ESC) switch)

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

  5. Is the measured value within specifications?

    YES 

    • Fault is intermittent caused by poor connection in ESP(ESC) switch harness and/or HECU's connector. Go to Verification Of Vehicle Repair procedure below.

    NO 

    • Substitute with a known-good ESP(ESC) switch and check for proper operation. If problem is corrected, replace ESP(ESC) switch and then go to Verification Of Vehicle Repair procedure below.
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