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Home >> Hyundai >> 2020 >> Sonata SEL >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Seat Heater Ventilation Control Unit (Rear) Diagnosis (Except HEV) >> DTC B1603-00: CAN Bus OFF >> DTC Information And Inspection >> DTC Setting Condition

DTC Setting Condition

Trouble Shooting Condition Possible Cause
Main Action
  • Monitor the CAN communication
  1. Open/Poor Connection both B-CAN High line and Low line
  2. Simultaneous Short-to-Battery both B-CAN High line and Low line
  3. Simultaneous Short-to-Ground both B-CAN High line and Low line
Prerequisite Condition
  • IG key "ON"
  • B-CAN communication: Active
Threshold Value
  • Impossible to send B-CAN message
Diagnosis Time
  • 2 sec
Component Name_ETM ETM
SHVU RR* "REAR SEAT WARMER CONTROL MODULE" SD200-6
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