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Home >> Kia >> 2012 >> Optima LX, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 52 (Power Seat Module Diagnosis - HEV) >> DTC B1603: CAN Communication Bus Off >> Inspection Repair >> Component Inspection
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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 CAN communication units one by one and monitor DTC to find the cause.
    Fig 1: Body Control Module And Power Seat Module - Circuit Diagram
    G08311955Courtesy of KIA MOTORS AMERICA, INC.
    Fig 2: Identifying Body Control Module And Power Seat Module Connector Terminals End View
    G08311956Courtesy of KIA MOTORS AMERICA, INC.

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

  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.