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Home >> Kia >> 2024 >> Telluride SX X-Line >> Repair and Diagnosis >> Brakes >> Traction Control >> Abs/ESC Diagnosis (3 Of 4) >> DTC C1840-87: Communication Error - RR_C_RDR >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • CAN message monitoring
  • Poor connector connection
  • Abnormal CAN communication circuits (open circuit, short circuit)
    • CAN high line open circuit
    • CAN low line open circuit
    • CAN high and low line open circuit
    • CAN high line short circuit to power/ground
    • CAN low line short circuit to power/ground
    • CAN high, low lines shorted to each other
    • Short circuit to ground after CAN high, low lines
  • Poor termination resistance
  • Transmitting controller bus off
  • Transmitting controller disconnected
  • Transmitting controller power, fuse or ground fault
  • Transmitting controller H/W, S/W fault
  • Faulty RR_C_RDR
Enable Condition
  • Normal 12V battery voltage (9 to 16V)
  • Ignition "ON"
Threshold Value
  • Not received ADAS message in BCA option
Detecting time
  • In control: 500 ms
  • Non-control: 1500 ms
Warning Lamp
  • None
Disable Condition
  • After ignition off/on, when ADAS CAN message is normally received consecutive 3 times