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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 114 (Antilock Brake System/Electronic Stability Control System Diagnosis (HEV)) >> DTC C1604: ECU Hardware Error >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

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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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