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DTC Description

If MCU can't erase or write a data of the EEPROM or master/slave processor detects abnormal operation in RAM, ROM, Interrupt, Timer, A/D Converter and Cycle time, HECU sets DTC 1604. DTC Detecting Condition

Item Detecting Condition Possible cause
DTC Strategy
  • Signal Monitoring
  1. Defective HECU
Threshold Value
  • MCU can't erase or write a data of the EEPROM
  • Master/Slave processor detects abnormal operation in RAM, ROM, Interrupt, Timer, A/D converter, Cycle time
Warning Indicator Lamp Status
  • EBD/ABS/ESC (ESP) Warning Indicator Lamp "ON"
Clear Condition
  • Ignition "OFF" and then "ON"
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