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Home >> Kia >> 2020 >> Optima Plug-In Hybrid EX >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Smart Key Code Saving Diagnosis (PHEV) >> DTC P1676-00: Immobilizer Smartra Message Error >> DTC Inspection >> Monitor KDS Data >> Check PCM communication

Check PCM communication

  1. Ignition "ON" & Engine "OFF"
  2. Connect KDS and setup the oscilloscope.
  3. Back probe and measure signal waveform of Pin No. 14 (EMS) terminal of PCM main harness connector and chassis ground by using VMI A channel.

    Specification  : Refer to figure below

    G13371815Courtesy of KIA MOTORS AMERICA, INC.
  4. Is the measured signal waveform normal?

    YES 

    • Fault is intermittent caused by poor contact in Smart key unit and/or PCM's connector or was repaired and Smart Key unit and memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

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