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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 U1001: High Speed CAN Communication Bus (H-CAN) >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • CAN Signal Check
  1. H-CAN communication line short-circuit the battery power
  2. H-CAN communication line short to ground
  3. H-CAN communication line disconnection
  4. H-CAN high line and low line at the same time short to ground
  5. Poor contact connectors Controller
Enable Conditions
  • IG ON
  • HPCU READY ON
  • Aux. Battery Voltage is between 9V and 16V
Threshold Value
  • Failure on CAN communication line for more than 1 sec
Diagnosis Time
  • 1 sec
DTC
  • 2 Driving Cycle
Service Lamp On Condition
  • 2 Driving Cycle
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