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Home >> Hyundai >> 2020 >> Sonata SEL >> Repair and Diagnosis >> Electrical >> Gauges >> Head Up Display Diagnosis (Except HEV) >> DTC B2801-00: MM CAN Signal Line Error >> DTC Information And Inspection >> DTC Detecting Condition

DTC Information And Inspection: DTC Detecting Condition

Item Detecting Condition Possible Cause
Main Action
  • Monitor the CAN data
  1. Open/Poor Connection in M-CAN High line
  2. Open/Poor Connection in M-CAN Low line
  3. Short both M-CAN High line and Low line coincidentally
Prerequisite Condition
  • Power Voltage: Between 9V and 16V
  • M-CAN communication: Active
Threshold Value Case1
  • M-CAN "High" line error
Case2
  • M-CAN "Low" line error
Diagnosis Time
  • 2 sec
Component Name_ETM ETM
HUD* "HEAD-UP DISPLAY" SD200-8
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