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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> HCU/Low Dc-Dc Converter Diagnosis (HEV) >> DTC P1679: Immobilizer EMS Data Fail (Data Frame, CS, Message Error) >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Check Data
  1. Faulty EMS ECU
  2. Faulty HPCU
Enable Conditions
  • Ignition Key "ON"
  • Aux, Battery Voltage is between 9V and 16V
  • HPCU READY "ON"
Threshold Value
  • No receiving Immobilizer authentication data from EMS
Diagnosis Time
  • 2.5s
DTC
  • 2 Driving Cycle
Service Lamp On Condition
  • -