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C1604 ECU Hardware Error: DTC Detecting Condition

Item Detecting Condition Possible cause
DTC Strategy
  • Internal monitoring
  • Faulty HECU
Case1 Monitoring Period
  • Continuous
Enable Conditions
  • If Internal control unit failures of the master/slave processor or peripheral integrated circuits is detected.
Case2 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 3s, 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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