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Home >> Kia >> 2012 >> Optima Hybrid >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Active Hydraulic Booster (AHB) System Diagnosis - HEV >> DTC C1604: ECU Hardware Error >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

Item Detecting Condition Possible cause
DTC Strategy
  • Internal Monitoring
  1. Faulty AHB ECU
Enable Conditions
  • When the MCU can't erase or write a data of the EEPROM.
  • If the master/slave processor detects abnormal operation in RAM, ROM, interrupt, timer, A/D converter and cycle time
  • If the ecu detects abnormal operation in internal power supply
Fail Safe
  • EBD warning lamp and buzzer are activated.
  • "Check Brake!" message is displayed on LCD.
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