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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 57 (Engine Control System Diagnosis (2 Of 2) (HEV)) >> DTC U0001: High Speed CAN Communication Bus Off >> W/Harness Inspection >> Check CAN communication line for open

Check CAN communication line for open

WARNING: This page is about a different variant/trim than selected.
  1. Ignition "OFF".
  2. Disconnect PCM harness connector.
  3. Measure resistance between High signal terminal and Low signal terminal of PCM harness connector.

    Specification:  Approx. 110~130Ω

    Fig 1: Measuring Resistance Between High Signal Terminal And Low Signal Terminal Of PCM Harness Connector
    G10606978Courtesy of HYUNDAI MOTOR AMERICA
  4. Is resistance within the specification?

    YES 

    • Go to next step as below.

    NO 

    • Check for open in wiring related to the CAN communication (PCM, EPS, MTS and vertical resistor at the junction box). Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
      NOTE: Vertical Resistor Resistance: Approx. 110~130Ω
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