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Home >> Kia >> 2020 >> Soul GT Line Turbo >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning System Diagnosis >> DTC B1685-88: Engine RPM fault - CAN Signal >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • CAN signal monitoring
  • Poor connector connection
  • CAN communication circuit
  • Faulty ECM/PCM
Enable Condition
  • Ignition "ON"
Threshold Value
  • CAN signal is not received for 0.5s or error signal is received
Fail Safe
  • RPM value replaced by "650"
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