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CAN Signal Inspection

  1. Ignition "OFF".
  2. Connect VMI to KDS/GDS and launch the oscilloscope (2 Channel):

    Channel A (+): Pin No. 5 (C-CAN High) terminal (IGPM connector)

    Channel A (-): Ground

    Channel B (+): Pin No. 4 (C-CAN Low) terminal (IGPM connector)

    Channel B (-): Ground

  3. Ignition "ON".

    Specification:  C-CAN High voltage - Approx. 2.4 to 3.5V/C-CAN Low voltage - Approx. 1.3 to 2.5V

    Fig 1: Scantool Display - Normal C-CAN Signal Waveform
    G12288295Courtesy of KIA MOTORS AMERICA, INC.
  4. Is the measured value within specification?

    YES 

    • 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 REPAIR " procedure.

    NO 

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