Component Inspection

ESC switch Check
1. Ignition "OFF" & Engine "OFF".
2. Disconnect the ESC switch connector.
3. Measure resistance between power terminal and signal terminal of the ESC switch connector.
  Specification :
  
  Approx. below 1Ω (In case of pressing the ESC switch)
  
  Approx. ∞ Ω (In case of not pressing the ESC switch)
  
  Fig 1: Measuring Resistance Between Power Terminal & Signal Terminal Of ESC Switch Connector
  Courtesy of HYUNDAI MOTOR CO.
4. Is the measured value within specifications?
  YES
  - Fault is intermittent, caused by poor connection in ESC switch harness and/or HECU's connector. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Substitute with a known-good ESC switch and check for proper operation.
    If problem is corrected, replace ESC switch and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.