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Home >> Kia >> 2024 >> EV9 Light >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> SBW Control Unit (SCU) Diagnosis >> DTC U1017-83: VCU CAN Communication Error >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • CAN communication monitoring
  • Poor connection
  • CAN communication circuit (open, short)
    • CAN high line open
    • CAN low line open
    • CAN high line short to 12V battery
    • CAN low line short to 12V battery
    • CAN high, low line short to each other
    • CAN high, low line short to each other and short to ground
  • Terminating resistance fault
  • Transmitting controller bus off
  • Transmitting controller disconnected
  • Transmitting controller power, fuse or ground fault
  • Transmitting controller H/W, S/W fault
  • CAN line noise
  • VCU fault (CAN module fault)
  • SCU fault (CAN module fault)
Enable Condition
  • Ignition "ON"
  • 12V battery voltage is more than 9V
  • No VCU timeout error
  • No VCU Alive counter
Threshold Value
  • When normal VCU CRC value message is not received
Detecting Time -
Fail Safe
  • Activate with PWM signal from VCU