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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> ESC/AHB Diagnosis (HEV) >> DTC C1503-01: TCS Switch Error >> Component Inspection >> ESC Switch Inspection

ESC Switch Inspection

  1. Turn "OFF" the ignition switch.
  2. Disconnect ESC OFF switch connector.
  3. Measure the resistance between the terminals of ESC OFF switch (component side).

    Specification:  Infinity

  4. Is the measured value within specifications?

    YES 

    • Fault might be intermittent caused by poor contact in the sensor's and/or ECU's connector or was repaired and ECU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair " procedure.

    NO 

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