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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 118 (Body Control Module (BCM) Diagnosis (HEV)) >> DTC B1603: CAN Bus Off >> Component Inspection

Component Inspection

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

Check internal errors of CAN communication units.

  1. Connect GDS.
  2. IG "ON" and engine "OFF".
  3. Select "DTC Analysis" mode.
  4. Disconnect DDM and monitor DTC to find the cause.
    Fig 1: CAN Communication Unit Diagram With PDM & Instrument Cluster Connector End Views
    G10602656Courtesy of HYUNDAI MOTOR AMERICA
    Fig 2: Body Control Module, Smart Key, PCM & EBS Control Module Connector End Views
    G10602657Courtesy of HYUNDAI MOTOR AMERICA

    *CAN communication units: BCM (Body Control Module), CLU (Cluster), PDM (Power Distribution Module), SMK (Smart Key), SJB (Smart Junction Box).

  5. Is the code erased?

    YES 

    • Substitute with a known - good unit and check for proper operation.

      If the problem is corrected, replace the unit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.