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Home >> Kia >> 2015 >> Optima Hybrid >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Electric Parking Brake Diagnosis - Optima HEV >> DTC C1604: ECU Hardware Error >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Internal Monitoring
  1. EPB ECU
Enable condition
  • Ignition "ON"
Threshold value
  • EPB ECU internal hardware error (EEPROM, RAM, ROM, interrupt, timer, A/D converter, cycle time)
  • Current sensor voltage is either higher than 4.7V or lower than 0.1V for more than 200 msec.
  • Current value is 2A for more than 200 msec after 5 seconds upon complete control
  • CAN Hardware Failure
Warning Indicator Lamp Status
  • Warning Indicator Lamp "ON"
  • EPB status lamp
    • ON: EPB switch "ON" and hold both of wheels
    • OFF: EPB switch "OFF" and release both of wheels
    • Illumination : EPB switch "ON" and not fully secure both of wheels
Fail Safe
  • EPB operation inhibited
Reset Condition
  • Ignition "OFF" and then "ON"