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Home >> Kia >> 2015 >> Optima Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 147 (Smart Key Code Saving (Button) Diagnosis - Optima (Except HEV)) >> DTC P1676: Immobilizer-Smartra Message Error >> DTC Inspection >> Monitor GDS Data

Monitor GDS Data

WARNING: This page is about a different car, the 2014 Kia Optima. However, it is still accessible from the selected car via links, so may be relevant.

Check PCM communication

  1. Ignition "OFF"
  2. Connect GDS and setup the oscilloscope.
  3. Ignition "ON"
  4. Measure signal waveform between PCM COM (Communication) terminal and chassis ground by using VMI A channel.
  5. Measure signal waveform of C-CAN-HIGH terminal of SMK unit connector and chassis ground using VMI B channel.
  6. Measure signal waveform of C-CAN-LOW terminal of SMK unit connector and chassis ground using VMI B channel.

    Specification:  Refer to the illustration below.

    Fig 1: C-CAN Signal Waveform Of SMK Unit And PCM When Ignition "OFF" Condition
    G00549566Courtesy of KIA MOTORS AMERICA, INC.
    Fig 2: C-CAN Signal Waveform Of SMK Unit And PCM When Ignition "ON" Condition
    G00549574Courtesy of KIA MOTORS AMERICA, INC.
  7. 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 

    • Perform following procedures.

SMK Status Information

  1. Ignition "ON" & Engine "OFF"
  2. Erase DTC after connecting GDS.
  3. Check Smart key status in "Vehicle S/W management" if DTC is retrieved.
    Fig 3: Checking Smart Key Status In "Vehicle S/W Management"
    G00549578Courtesy of KIA MOTORS AMERICA, INC.
    Fig 4: Number Of Registered Keys And Learning Status
    G00549582Courtesy of KIA MOTORS AMERICA, INC.
  4. Is the Smart key unit learnt status ?

    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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