Component Inspection

Ignition "OFF".
Disconnect ESC switch connector.
Press the ESC switch.
Measure resistance between terminal "3" of the ESC switch harness connector and terminal "4" of the ESC switch harness connector.
Specification: Approx. below 1Ω

Fig 1: Measuring Resistance Between Terminal 3 Of ESC Switch Harness Connector And Terminal 4 Of ESC Switch Harness Connector
Courtesy of HYUNDAI MOTOR CO.
Is the measured resistance within specifications?
YES
- Fault is intermittent caused by poor connection in ESC switch line or was repaired and HECU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then 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.