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DTC C1604 Ecu Hardware Error: DTC Detecting Condition

WARNING: This page is about a different car, the 2007 Kia Sedona and 2006 Kia Sedona. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTING CONDITION CHART

Item Detecting Condition Possible cause
DTC strategy
  • Internal monitoring
  • Inoperative HECU
Case 1 Monitoring Period
  • Continuous
Enable Conditions
  • If Internal control unit failures of the master/slave processor or peripheral integrated circuits is detected.
Case 2 Monitoring Period
  • Directly after ignition on, during reading of EEPROM-values
Enable Conditions
  • Failure is set if checksum not correct or PSW-EEPROM-Handler reported unknown failure during EEPROM-value reading.
  • If EEPROM reading sequence take longer then 3 s, a failure is set.
Fail Safe
  • The ABS/EBD/ESC functions are inhibited.
  • The ABS/EBD/ESC warning lamps are activated.
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