Check CAN communication Line

Ignition "ON"
Set-up the oscilloscope as mentioned below.
Back probe and measure signal waveform of Pin No. 1 (High) terminal of Passenger side Body Sensor connector and chassis ground.
Back probe and measure signal waveform of Pin No. 2 (Low) terminal of Passenger side Body Sensor connector and chassis ground.
Specification: Refer to Figure below

Courtesy of KIA MOTORS AMERICA, INC.
Is the measured signal waveform normal?
YES
- Carefully re-do this troubleshooting guide steps.
- If problem still occurs, replace Passenger side Body Sensor ECU and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Check for open in CAN (High) and CAN (Low) communication line between Body Sensor Mat and Body Sensor ECU, and repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.