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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 64 (HEV Motor System Diagnosis (HEV)) >> DTC U0001: High Speed CAN Communication Bus Off (C-CAN) >> W/Harness Inspection >> CAN Register and Communication Line Inspection

CAN Register and Communication Line Inspection

WARNING: This page is about a different variant/trim than selected.

■ CAN Register and Communication Line Inspection 1 

  1. Ignition OFF.
  2. Connect all module connectors in proper locations.
  3. Measure resistance between terminal 3 and 11 of diagnostic connector.

    Specification:  About 60 Ω

    Fig 1: Measuring Resistance Between Terminals Of Diagnostic Connector
    G10602554Courtesy of HYUNDAI MOTOR AMERICA
    Fig 2: PCM Connector Terminal
    G10602555Courtesy of HYUNDAI MOTOR AMERICA
  4. Is the measured resistance within specification?

    YES 

    • Check Each Module 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.
    • Go to next procedure.

    NO 

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

■ CAN Register and Communication Line Inspection 2 

  1. Ignition OFF.
  2. Disconnect PCM and BMS connectors.
  3. Measure resistance between terminal CAN Low and CAN High of ECM and BMS Modules.

    Specification:  About 120 Ω

    Fig 3: Measuring Resistance Between Terminal CAN Low And CAN High Of ECM And BMS Modules
    G10602556Courtesy of HYUNDAI MOTOR AMERICA
    Fig 4: EWP Connector Terminal
    G10602557Courtesy of HYUNDAI MOTOR AMERICA
  4. Is the measured value within specification?

    YES 

    • Go to next procedure.

    NO 

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