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Home >> Kia >> 2020 >> Optima EX Premium >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Dual Clutch Transmission Diagnosis - 1.6L (2 Of 2) (Except HEV) >> DTC U0121-87: Lost Communication With Anti-Lock Brake System (ABS) Control Module >> DTC Inspection >> Monitor DTC Status

Monitor DTC Status

  1. Connect KDS to Data Link Connector (DLC).
  2. Ignition "ON"
  3. Select correct Vehicle Model, Year, and Engine Type.
  4. Select "Engine" and "A/T", "ESP" and "BCM (Cluster Module)" system.(1)
  5. Select "Fault Code Searching".(2)
    G12937459Courtesy of KIA MOTORS AMERICA, INC.
  6. Monitor DTCs in selected systems.
    G12937460Courtesy of KIA MOTORS AMERICA, INC.
  7. Does selected system have any CAN related DTCs or failed to communicate via KDS?

    YES 

    • Repair any CAN related DTCs first and then carefully re-do this troubleshooting guide steps.
    • If problem still occurs, go to "TERMINAL AND CONNECTOR INSPECTION " procedure.

    NO 

    • Fault might be intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and control module memory is not cleared yet. Thoroughly check terminal of battery, all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
    • Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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