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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 >> Component Inspection

Component Inspection

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  1. Ignition "OFF".
  2. Measure resistance between High signal terminal and Low signal terminal of PCM connector (PCM side).

    Specification:  Approx. 110~130Ω

    Fig 1: Measuring Resistance Between High And Low Signal Terminal Of PCM Connector (PCM Side)
    G10606981Courtesy of HYUNDAI MOTOR AMERICA
  3. Is resistance within the specification?

    YES 

    • Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Check PCM for contamination, deterioration, or damage. Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.