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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Active Air Flap-Right Diagnosis (HEV) >> DTC U0001: High Speed CAN Communication Bus off >> Wiring Inspection >> CAN Register and Communication Line Inspection >> CAN Register and Communication Line Inspection 1

CAN Register and Communication Line Inspection 1

  1. IG key OFF.
  2. HCU, PCM, MCU, BMS, A.A.F, FATC..., connector.
  3. Measure resistance between terminal 3 and 11 of diagnostic connector.

    Specification:  About 60 Ω

  4. Is the measured value within specification?

    YES 

    • Check HCU, PCM, MCU, AAF, FATC, connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Go to next procedure.
    • If the measured value is out of specification, repair or replace 120Ω CAN register (Inside of PCM and BMS and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
    • If the measured value is lower than 10Ω, repair or replace CAN High and CAN Low are short each other. And then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
    • If the measured value is ∞ Ω, repair or replace the open in CAN High/CAN Low circuit. And then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
    • Go to next procedure.
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