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Home >> Kia >> 2019 >> Optima S >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Electric Parking Brake Diagnosis (Except HEV) >> DTC C1501-01: Switch Failure >> Wiring Inspection >> Signal Circuit Inspection

Signal Circuit Inspection

  1. Ignition "OFF".
  2. Disconnect EPB Switch connector.
  3. Ignition "ON".
  4. Measure voltage between pin No. 30, 31, 10, 11 (SW1, SW2, SW3, SW4) of EPB Switch harness connector and chassis ground.

    Specification:  See below

    G12926905Courtesy of KIA MOTORS AMERICA, INC.
  5. Is the measured value within specification?

    YES 

    NO 

    • Repair open or short in signal circuit between battery and EPB Switch harness connector and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.