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Home >> Kia >> 2015 >> Optima Hybrid >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Electric Parking Brake Diagnosis - Optima HEV >> DTC C1501: Switch Failure >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Signal Monitoring
  1. Poor connection or damaged wiring
  2. EPB switch
  3. EPB switch open or short
  4. EPB ECU
Enable condition
  • EPB Wake up status, normal battery condition
Threshold value
  • Switch wiring circuit open for more than 2 sec.
  • Short circuit to GND is detected in the switch for more than 2 sec.
  • Short circuit to battery is detected in the switch for more than 2 sec.
  • Switch wiring circuit short to each other for more than 2 sec.
  • Switch stuck "ON" is detected for more than 90 sec. on under 4 km/h (Approx. 2.5 mph) of vehicle speed
Warning Indicator Lamp Status
  • Warning Indicator Lamp "ON"
Fail Safe
  • EPB operation inhibited
Reset Condition
  • Ignition "OFF" and then "ON" or Return to normal state